JP2022165110A - Sheet conveying method, conveying device and bag making machine - Google Patents

Abstract

To provide a sheet conveying method and conveying device capable of properly conveying a folded sheet.SOLUTION: A conveying device comprises: a conveying unit 73 that conveys a folded sheet; a discharge unit 88 that is installed on an upstream side of the conveying unit 73 for discharging the sheet to the conveying unit 73; and an angle adjusting unit 79 for adjusting an angle of a conveying surface 201 of the sheet of the conveying unit 73. In the above configuration, the angle adjusting unit 79 comprises a folding adjustment unit 96 that adjusts the angle of the conveying surface 201 according to a folded state of the sheet when the sheet folded at a fold set in a direction intersecting the conveying direction of the conveying unit 73 is discharged to the conveying unit 73 by the discharging unit 88. The folding adjustment unit 96 comprises a tilting unit 97 for tilting the conveying surface 201 at a predetermined angle when the folded sheet is discharged by the discharging unit 88 along the conveying direction of the conveying unit 73 with the fold as a top.SELECTED DRAWING: Figure 9

Description

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

2. Description of the Related Art Conventionally, a sealing device is known that folds a flap while moving an envelope along a predetermined transport path. Japanese Unexamined Patent Application Publication No. 2002-200000 discloses a sealing device in which an envelope having an adhesive film attached thereto is conveyed to a flap pressing mechanism, and a folding plate that rotates folds the flap of the envelope. The flap is pressed against the envelope body and sealed.

JP-A-9-240628

In the sealing device described in Patent Document 1, only the flaps need to be folded and sealed. On the other hand, in a bag making machine that manufactures envelopes by folding a sheet cut into a predetermined shape and applying glue, the edge of the folded sheet interferes with other envelopes while the sheet is being conveyed, resulting in a jam. may cause

SUMMARY OF THE INVENTION It is an object of the present invention to provide a sheet conveying method and a conveying apparatus capable of properly conveying a folded sheet.

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

Further, in the above configuration, the angle adjustment unit adjusts the angle when the sheet folded at a fold set in a direction intersecting the conveying direction of the conveying unit is discharged to the conveying unit by the discharging unit. A folding adjustment unit is provided for adjusting the angle of the conveying surface according to the folded state of the sheet.

Further, in the above configuration, the folding adjusting section adjusts the conveying surface to a predetermined position when the folded sheet is discharged by the discharging section along the conveying direction of the conveying section with the fold as the leading edge. Equipped with a tilting part for tilting at an angle.

Further, in the above configuration, the folding adjusting section is configured to cause the sheet, which has been folded to form a first fold, to be transported by the discharging section along the conveying direction of the conveying section with the first fold leading. A flattening portion is provided for flattening the conveying surface along the horizontal direction when the sheet is reversed toward the upstream side to form the second fold after being discharged by a fixed amount.

Further, in each of the configurations described above, a stacking section for vertically stacking the plurality of sheets is provided on the downstream side of the conveying section.

The bag-making machine of the present invention includes a conveying device according to each of the above configurations, a folding unit provided on the upstream side of the conveying unit for folding the sheet, and applying glue to a predetermined position of the sheet along the conveying direction of the sheet. and a glue applying part for applying.

A sheet conveying method according to the present invention is a sheet conveying method for conveying a folded sheet by a conveying unit, wherein the sheet is conveyed from a discharge unit installed upstream of the conveying unit toward the conveying unit. When the sheet is discharged, the sheet is conveyed by the conveying section in which the angle of the conveying surface of the sheet is adjusted according to the folded state of the sheet.

Further, in the above configuration, the fold is formed by being folded at a fold set in a direction intersecting the conveying direction of the conveying unit, and the fold is set as a leading edge and along the conveying direction of the conveying unit. When the sheet is discharged by the discharging section, the conveying surface is tilted at a predetermined angle.

In the above configuration, the sheet folded and formed with the first fold is discharged by the discharge unit by a predetermined amount along the conveying direction of the conveying unit with the first fold at the head, and then the second sheet is discharged. When the sheet is reversed toward the upstream side to form a fold, the conveying surface is flattened along the horizontal direction.

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

In the bag-making method of the present invention, a glue applying section applies glue to a predetermined position of the sheet along the conveying direction of the sheet, the sheet is folded by the folding section, the glue is applied, and the folded sheet is folded as described above. Conveyed by each process.

According to the present invention, a conveying section that conveys a folded sheet, a discharge section that is installed on the upstream side of the conveying section and discharges the sheet to the conveying section, and a conveying surface of the sheet of the conveying section. Since the angle adjustment part adjusts the angle, when the leading and trailing sheets interfere with each other due to the folded sheets, the angle of the conveying surface can be adjusted to eliminate the interference. can be avoided, and the sheet can be properly conveyed.

In addition, the angle adjusting section is adapted to fold the sheet when the sheet folded at a fold set in a direction intersecting the conveying direction of the conveying section is discharged to the conveying section by the discharging section. In the case where the folding adjustment unit is provided for adjusting the angle of the conveying surface according to the state of (1), when the edge of the sheet interferes with another sheet by folding in the direction intersecting the conveying direction, the folding The angle of the conveying surface can be adjusted by the adjusting section, and the sheet can be properly conveyed.

The folding adjusting section includes a tilting section that tilts the conveying surface by a predetermined angle when the folded sheet is discharged by the discharging section along the conveying direction of the conveying section with the folded sheet at the top. In this case, by tilting the conveying surface with the tilting section, the preceding sheet can be conveyed downstream at a position lower than the discharge height of the discharge section, thereby avoiding interference with the succeeding sheet being discharged. is.

The folding adjustment unit discharges a predetermined amount of the sheet, which has been folded and formed with the first fold, by the discharge unit along the conveying direction of the conveying unit with the first fold leading, When the sheet is reversed toward the upstream side to form the second fold, if the sheet is provided with a flattened portion that lays down the conveying surface along the horizontal direction, the sheet is folded at the second fold. When the sheet is reversed, the edge of the sheet folded at the first fold interferes with the discharge section and is not conveyed properly, thereby avoiding jamming.

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

The bag making machine of the present invention includes: a folding section provided upstream of the conveying section for folding the sheet; , the folded sheet can be properly conveyed when the sheet is folded at the folding section and the glue is applied at the glue application section to manufacture the envelope.

A sheet conveying method of the present invention is a sheet conveying method in which a folded sheet is conveyed by a conveying section, and the sheet is conveyed toward the conveying section from a discharge section installed upstream of the conveying section. When the sheet is discharged, the sheet is conveyed by the conveying unit in which the angle of the conveying surface of the sheet is adjusted according to the folded state of the sheet. When there is a risk of jamming due to interference, the angle of the conveying surface can be adjusted to avoid the interference, and the sheet can be properly conveyed.

Further, the sheet is folded at a fold set in a direction intersecting the transport direction of the transport section to form the fold, and the sheet is formed by the discharge section along the transport direction of the transport section with the fold leading. When the conveying surface is tilted at a predetermined angle when discharging the sheet, tilting the conveying surface enables the preceding sheet to be conveyed downstream at a position lower than the discharge height of the succeeding sheet.

Then, a predetermined amount of the folded sheet on which the first fold is formed is discharged by the discharge unit along the conveying direction of the conveying unit with the first fold leading, and then the second fold is formed. When the sheet is reversed toward the upstream side for folding, when the conveying surface is flattened along the horizontal direction, when the sheet is reversed for folding at the second fold, the first fold It is possible to avoid the edge of the eye-folded sheet from being properly conveyed by the discharge section and causing a jam.

Further, when a plurality of sheets conveyed from the conveying section are vertically stacked on the stacking section provided downstream of the conveying section, the folded sheets can be properly stacked.

According to the bag-making method of the present invention, the paste is applied to a predetermined position of the sheet along the conveying direction of the sheet at the glue applying section, the sheet is folded at the folding section, and the glue is applied by the conveying method in each of the steps. Since the coated and folded sheet is conveyed, the folded sheet can be properly conveyed when the sheet is folded at the folding section and the glue is applied at the glue applying section to manufacture the envelope.

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

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

The bag making machine 10 has eight conveying roller pairs 81-88. The conveying roller pairs 81, 82, 83 are connected to the first driving section 91 and driven to rotate. The pair of conveying rollers 84 and 85 are connected to a second driving section 92 and driven to rotate. The conveying roller pairs 86, 87, and 88 are connected to a third driving section 93 and driven to rotate. The conveying roller pairs 86 , 87 , 88 can reversely travel the sheet 100 along the conveying surface 200 by the reverse rotation of the third driving section 93 .

The eight conveying roller pairs form a conveying surface 200 on which the sheet 100 is conveyed, and the conveying surface 200 is coplanar from the air supply unit 12 to the conveying roller pair 88 . On the conveying surface 200 on which the sheet 100 is conveyed, sensors 23, 24, 25, 26, 27, and 28 for detecting passage of the sheet 100 at each position (detecting double feeding) are provided. are placed. Each sensor uses, for example, an optical transmission sensor.

A common form of "Western-style envelope" has a horizontally long rectangular shape and a sealing opening is formed on the long side. When producing a Western-style envelope with the bag making machine 10, for example, as shown in FIG. It is crimped to the side piece 103 .

Specifically, the bag making machine 10 conveys the planar sheet 100 shown in FIG. The Western-style envelope 90 is manufactured by processing it so that it can be folded.

The sheet 100 is composed of a bottom piece 101, a main body 102, side pieces 103 protruding from both sides of the main body 102 and serving as glue substitutes, and flaps 104. - 特許庁The sheet 100 is formed with three folds 110 including a longitudinal fold 111 and first and second folds 112 and 113 . The vertical crease 111 extends along the transport direction F. The first and second folds 112 and 113 are set to intersect the conveying direction F of the sheet 100 by the conveying roller pairs 81-88. Particularly in this embodiment, the first and second folds 112 and 113 are along the width direction W orthogonal to the transport direction F. As shown in FIG.

The sheet 100 is folded along the longitudinal crease 111 that is the boundary line between the main body 102 and the side piece 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 crease 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. As shown in FIG.

The sheet 100 is conveyed with the bottom plate 101 on the downstream side in the conveying direction F and the flap 104 on the upstream side, and is made into a bag. In the state of FIG. 2(c), the first fold 112 is the leading edge of the conveyed sheet 100, and the contents of the envelope 90, such as letter paper, various documents, advertisements, etc. is located on the upstream side in the conveying direction F of the .

FIG. 3(a) shows a perspective view of the envelope 90 of FIG. 2(c). The flap 104 of the envelope 90a of FIG. 3(a) is not folded. If necessary, the envelope 90 may be further folded at the second fold line 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 creases 110 . According to the above configuration, when the contents are inserted from the insertion slot 116 of the envelope 90b and then sealed with tape or glue, the flap 104 is neatly sealed on the folded bottom piece 101 because of the crease. can be done.

[Supply unit 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 the sheets 100 sent out by the air supply unit 12. Further, it has a conveying roller 81 for conveying to the downstream side in the conveying direction F. Further, the air supply unit 12 is provided with a sensor 22 for detecting 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, and a sensor 22 on the supply tray 11. 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 unit 1 and its periphery, FIG. 5 is a view of FIG. 4 viewed from the upstream side in the transport direction F, FIG. 6 is a plan view of FIG. 4, and FIG. It is a cross-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 guides 13 guide the sides of the sheet 100 . When the side edges 114 of the sheet 100 are not straight, as in 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 each other and separate from each other in the width direction W according to the size of the sheet 100 . Endless guide belts 18 are installed above and below the guide 13 so as to rotate with a predetermined distance therebetween. Each guide belt 18 is stretched over 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 portion 29 . A pair of upper and lower gears 19a shown on the right side in FIG.

The guide 13 is composed of 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 the 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 the upper and lower guide belts 18 moving forward. The left guide 131 is fixed to the rear left portion of the belt 18, and the right guide 132 is fixed to the front right portion of the belt 18, respectively.

The guide portion 15 guides movement in the width direction W of the guide 13 . The guide portion 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 both upper portions of the left and right guides 13 . Thus, the guide 13 is vertically provided on the guide shaft 31 through the connecting member 34 and guided.

In FIG. 5, the operation portion 14 is provided on the connecting member 34a shown on the right side. The operation part 14 is provided for the operator to manually adjust and position the position of the guide 13 in the width direction W. As shown in FIG. The operating section 14 has a knob 141 . By rotating the knob 141 by the operator, the state in which the guide 13 is fixed at a predetermined position in the width direction W and the state in which the guide 13 is movable in the width direction W are switched. When the operator manually moves the operating portion 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 circulate by the same distance as the amount of movement of the right guide 132 . The left guide 131 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 in a rod shape. The support member 41 is rotatably supported on the lower surface of the supply tray 11 by a swing shaft 42 .

Locking portions 40 are provided at upstream end portions in the transport direction F of the left and right support members 41 . The locking portion 40 is connected to and locked to the biasing member 43 below the supply tray 11 . Both locking portions 40 are biased 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 urged in the direction of separating the pair of guides 13 from each other by the urging force of the urging member 43 . Therefore, the contact portion 39 always contacts the inner surface of the guide 13 . As the guide 13 is moved in the width direction W, the support member 41 swings around the swing shaft 42 . As the length between the guides 13 increases, the length between the left and right contact 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 surface of the supply tray 11 on which the sheet 100 is placed. The notch 17 is provided with an accommodating portion 44 that accommodates the exposed portion 45 of the support member 41 from the notch 17 . When the left and right guides 13 are positioned closest to each other, the support member 41c is oriented along the conveying direction F, and the exposed portion 45 from the notch 17 of the support member 41 is positioned as indicated by the two-dot chain line in FIG. is housed in the housing portion 44 .

[First crease processing unit 2]
As shown in FIG. 1, the first crease processing unit 2 is composed of an upper mold having a convex upper part and a lower mold having a concave lower part. A horizontal crease is formed in a direction perpendicular to the conveying direction F of the sheet 100 . A known mechanism can be employed as the crease processing portion 2 .

[Second crease processing unit 4]
As shown in FIG. 1, the second crease processing unit 4 has a lower crease blade having a round edge with a convex portion formed on the outer circumference, and an upper blade having a round edge with a concave portion formed on the outer circumference. They are installed at two locations in the width direction W perpendicular to the conveying direction F, and form vertical creases along the conveying direction F of the sheet 100 at the vertical creases 111 (two locations) of the sheet 100 . A known mechanism can be employed as the second crease processing portion 4 .

[First folding part 3]
The first folding section 3 folds the sheet 100 . The first folding unit 3 serves as folding means for folding the left and right side pieces 103 of the sheet 100. The first folding unit 3 is a pair of folding devices (first folding units) arranged on both sides in the width direction W perpendicular to the conveying direction F of the sheet 100 so as to face each other. 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 therebetween, and a pair of conveying roller pairs 84 (a driving roller 38 and a driven roller 84) for conveying the sheet 100 conveyed on the lower guide plate 33 to the downstream side. rollers 35).

[Glue application unit 5]
The glue applying unit 5 applies glue to a predetermined position of the sheet 100 along the conveying direction F of the sheet 100 . The glue application section 5 is composed of a pair of application devices 5a and 5b arranged opposite to each other in the width direction W. As shown in FIG. In addition, the coating device 5a and the coating device 5b have a bilaterally symmetrical configuration.

The coating devices 5a and 5b have a nozzle portion, a position setting mechanism, and a vertical driving mechanism (not shown). The nozzle portion can apply glue to the conveyed sheet 100 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 portion 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 conveying roller pair 86 is arranged upstream in the conveying direction F of the sheet 100 , and the conveying roller pair 87 is arranged downstream of the conveying roller pair 86 in the conveying direction F of the sheet 100 . The guide plate 65 is erected above both upper conveying rollers 861 and 871 of the conveying roller pairs 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 upward the sheet 100 that has reached above the upper roller 861 of the conveying roller pair 86 . The front guide plate 67 guides upward the sheet 100 that has reached above the upper roller 871 of the conveying roller pair 87 .

The switching unit 63 is installed between the pair of conveying rollers 86 and 87 . The switching portion 63 interferes with the sheet 100 being conveyed on the conveying surface 200 and guides the front end or the edge of the sheet 100 above the conveying surface 200 . The switching portion 63 can swing around the support shaft 631 . The switching portion 63 is swung among the parallel posture P, the forward upward posture Q, and the rearward upward posture U. As shown in FIG. The parallel posture P is a posture substantially parallel to the transport surface 200, as indicated by the solid line in FIG. In the parallel posture P, the switching portion 63 guides the sheet 100 in the substantially horizontal direction toward the nip 873 of the conveying roller pair 87 on the front side.

The forward-upward posture Q is indicated by a dashed line in FIG. The forward upward attitude Q is inclined with respect to the conveying surface 200 such that the front portion is positioned above the conveying surface 200 and the rear portion is positioned below the conveying surface 200 . In the front-up posture Q, the front end of the sheet 100 is guided above the upper roller 871 of the transport roller pair 87 at the front. The front end of the seat 100 is further guided by a guide plate 67 installed above it.

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-up posture U, the edge of the sheet 100 is guided above the upper roller 861 of the rear conveying roller pair 86 . The edge of the sheet 100 is further guided by a guide plate 66 placed above it.

The folding guide 62 is arranged above the switching portion 63 . The folding guide 62 is formed in a substantially U shape when viewed from the side. The folding guide 62 includes an upper guide portion 625 , a front guide portion 626 , an inclined guide portion 627 and a rear guide portion 628 . The upper guide portion 625 extends in the width direction W while maintaining a posture substantially parallel to the conveying surface 200 . The upper guide portion 625 guides the upper surface of the seat 100 . The front guide portion 626 is erected at the front end portion of the upper guide portion 625 . The front guide portion 626 guides upward the front end portion of the sheet 100 guided upward on the conveying surface 200 by the switching portion 63 . A front edge 621 is provided at the connecting portion between the upper guide portion 625 and the front guide portion 626 . The front edge 6221 contacts the fold line 100 and acts to fold the sheet 100 when the folding guide 62 is lowered to fold 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 the sheet 100 is folded.

The inclined guide portion 627 is provided at the edge of the upper guide portion 625 . After the rear part of the sheet 100 is folded at the second folding line 113 set in a direction intersecting the conveying direction F, the inclined guide part 627 guides the edge of the sheet 100 upward when the sheet 100 is conveyed downstream. It guides the entry into the gap between the portion 625 and the switching portion 63 .

The rear guide portion 628 is erected on the edge of the inclined guide portion 627 . The rear guide portion 628 guides upward the edge of the sheet 100 guided upward on the conveying surface 200 by the switching portion 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 the sheet 100 is folded.

The folding guide 62 is configured to be movable in the vertical direction while maintaining a state in which the upper surface guide portion 625 is along the substantially horizontal conveying surface 200 . The folding guide 62 is moved up and down between the folding position and the retracted position. At the folding position, the folding guide 62 approaches the switching portion 63 in the parallel posture P and folds the sheet 100 . At the retracted position, the folding guide 62 is retracted from the switching portion 63 and positioned at a predetermined distance.

[Pressure part 8]
The pressure unit 8 is composed of an upper mold 8a movable in a width direction W orthogonal to the conveying direction F, and a lower mold 8b extending within a range of movement of the upper mold 8a. By moving the upper die 8a in the width direction W, the sheet 100 folded at the first and second folds 112 and 113 set in the direction intersecting the conveying direction F at the second folding section 6 is folded at the first fold. , the second folds 112 and 113, so that the sheet 100 is folded at the first and second folds 112 and 113 more reliably.

[Receiving part 7]
The receiving part 7 constitutes the conveying device of the present invention. The receiving section 7 includes a conveying roller pair 88 , a conveyor 72 and a stacking section 71 . The conveying roller pair 88 constitutes the discharge section of the present invention. A conveying roller pair 88 discharges the sheet 100 to 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 conveying roller pair 88 is installed downstream of the pressure unit 8 in the conveying direction F. As shown in FIG. The transport roller pair 88 is installed upstream of the conveyor 72 .

9 is a perspective view of the conveyor 72 and its periphery, 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. . The conveyor 72 includes belts 73 , rollers 77 , pressers 78 , support members 76 and angle adjusters 79 .

The belt 73 constitutes the conveying section of the present invention. A belt 73 conveys the folded sheet 100 . The conveying direction of the folded sheet 100 by the belt 73 is the same as the conveying direction F by the pair of conveying rollers 81-88. The height of the conveying surface 201 of the sheet 100 by the belt 73 is set at a position lower 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 stretched over rollers 77 that are spaced apart from each other by a predetermined amount in the forward and rearward directions in the conveying direction F of the sheet 100 .

A pair of front and rear rollers 77 is composed of 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 . A retainer 78 is installed above the support member 76 . The presser foot 78 is supported by a 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 portion of the side member 50 rotatably supports the rear roller 74 and the edge thereof supports the 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 described later instead of the side member 50 .

The link 51 is formed in an L shape when viewed from the side. The link 51 has a vertical member 53 and a horizontal member 54 . The upper end of vertical member 53 is rotatably connected to the front end of 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 stacking section 71 is connected to this connecting portion.

Edges of the left and right horizontal members 54 are connected by a construction shaft 56 . The installation shaft 56 protrudes outward from the lateral member 54 . Engagement portions 57 are provided at both left and right ends of the installation shaft 56 . The engaging portion 57 is engaged with the guide hole 58 of the angle adjusting portion 79 .

The angle adjuster 79 adjusts the installation angle of the belt 73 . Accordingly, the angle adjustment unit 79 adjusts the angle of the conveying surface 201 of the sheet 100 by the belt 73 . The angle adjuster 79 includes a folding adjuster 96 . The folding adjustment unit 96 adjusts the sheet 100 when the sheet 100 folded in the direction intersecting the conveying direction F of the belt 73 as the conveying unit is discharged onto the belt 73 by the conveying roller pair 88 as the discharging unit. The angle of the conveying surface 201 is adjusted according to the folding state.

The folding adjusting section 96 includes a tilting section 97 and a flattening section 98 . When the folded sheet 100 is discharged along the conveying direction F of the belt 73 as the conveying portion by the conveying roller pair 88 as the discharging portion with the first fold 112 as the leading edge, the tilting portion 97 The conveying surface 201 is tilted at a predetermined angle. In the lying portion 98, the sheet 100 having the first crease 112 formed thereon is folded along the conveying direction F of the belt 73 as the conveying portion by the conveying roller pair 88 as the discharging portion with the first crease 112 as the leading edge. After the sheet 100 is discharged by a predetermined amount, the conveying surface 201 is flattened along the horizontal direction when the sheet 100 is reversed toward the upstream side to form the second fold 113 .

The angle adjuster 79 has a guide hole 58 . The guide hole 58 guides the locking portion 57 and makes the conveying surface 201 at a plurality of angles. The guide hole 58 includes a horizontal guide portion 580, 1-3 guide portions 581-583, and a storage guide portion 584. As shown in FIG. 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-third guide portions 581 to 583 lock the locking portion 57 so that the conveying surface 201 of the sheet 100 has three different angles. The storage guide part 584 guides the locking part 57 so that the conveyor 72 is folded when the apparatus is stored.

The stacking unit 71 is installed downstream of the belt 73 as a conveying unit. The stacking unit 71 vertically stacks a plurality of sheets 100 . The stacking unit 71 includes a stacking tray 70 . The stacking tray 70 is installed at a position lower than the conveying surface 201 of the sheet 100 of the belt 73 and extends forward. The stacking portion 71 maintains a substantially horizontal posture or a posture in which the front end is slightly higher than the edge. When stored, the stacking portion 71 is swung relative to the support member 76 , tilted vertically, and hung down on the support member 76 .

A pair of upper and lower guides 89 for guiding the sheet 100 on the conveying surface 200 is installed downstream of the conveying 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 configured as described above will be described.
The operator loosens the knob 141 to make the guide 13 movable in the width direction W. An operator places a plurality of sheets 100 on the supply tray 11 such that the bottom piece 101 is on the downstream side in the transport direction F and the flap 104 is on the upstream side in the transport direction F. FIG. Then, according to the size of the sheet 100 , the guides 13 are positioned so as to contact the left and right side edges 115 of the side pieces 103 of the sheet 100 .

Both the upper ends 133, 135 and the lower ends 134, 136 of the left and right guides 13 are fixed to predetermined positions of the guide belt 18, so that only one of the upper ends 133, 135 and the lower ends 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 properly guide the side edge 115 of the sheet 100 .

The support member 41 swings around the swing shaft 42 as the guide 13 moves in the width direction W. As shown in FIG. Since the support portion 16 is provided within the notch 17 in this manner, even when the notch 17 is formed in the supply tray 11, the sheet 100 can be supported by the support portion 16 within the notch 17. can. It is possible to prevent the sheet 100 from sagging inward of the notch 17, and the sheet 100 can be properly conveyed.

Since the support member 41 swings about the swing shaft 42 positioned at the center of the feeding direction F of the supply tray 11, the sheet punched into the shape shown in FIG. Supports 16 can be positioned on side pieces 103 when 100 is placed.

As shown in FIG. 13, as the size of the sheet 100 increases, both the lengths in the transport 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, the contact portion 39 of the support member 41 swings around the swing shaft 42 while contacting the guide 13 as the guide 13 moves outward in the left-right width direction W, resulting in a small size. It moves backward from when the sheet 100S is placed.

The length of the bottom piece 101 in the conveying direction F of the large size sheet 100L is generally 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 behind 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 the change in the position of the side piece 103 of the sheet 100 . The side piece 103, which tends to fall inward of the notch 17, can be supported by the contact portion 39 moved to the opposite position. In this manner, even when a plurality of types of sheets 100 having different lengths in the width direction W are supplied, the positions corresponding to the side pieces 103 of the sheets 100 can be properly supported from below by the support portion 16. .

When the operator performs an operation to start the operation of 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 toward the conveying roller pair 81 while being sucked by the air suction belt in the air supply unit 12, and after the sheet 100 is transferred to the conveying roller pair 81. , and the pair of conveying rollers 81 to the downstream side in the conveying direction F. After that, it passes through the first crease processing section 2 . At this time, the first crease processing unit 2 operates to form creases on the first fold 112 and the second fold 113 of the sheet 100 . As a result, the bottom piece 101 can be easily folded back toward the main body 102 side. Also, the flap 104 can be easily folded back toward the folded bottom piece 101 side.

(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 creases 111 (two places on the left and right in the width direction W) of the sheet 100 are directly below the crease blades (circular blades) of the second crease processing unit 4 which are installed at two places in the width direction W perpendicular to the conveying direction F. are located respectively. Then, the second crease processing unit 4 operates to form creases in the longitudinal folds 111 . As a result, the side pieces 103 (two places on the left and right sides in the width direction W) can be easily folded inward.

(3) The sheet 100 on which creases are formed by the second crease processing section 4 stops at the first folding section 3 . By forming creases in advance in the longitudinal creases 111 when the side pieces 103 of the sheet 100 are folded, it is possible to secure the accuracy of the folding position when folding the flaps.

As shown in FIG. 5, in the first folding section 3, in addition to the basic configuration 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 conveying roller pair (a driving roller 38 and a driven roller 35) for further conveying the sheet 100 conveyed on the lower guide plate 33 to the downstream side. A notch is formed in the lower guide plate 33 at the nip of the conveying roller pair.

5A, the folding plate 32 of the folding device 3a (3b) of the first folding section 3 is positioned on the outer side 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 is rotated toward the inner lower guide plate 33, whereby the side piece 103 is folded inward at the crease-finished vertical crease 111, and as shown in FIG. As shown in 5(c), it is overlaid on the main body 102 via the upper guide plate 36 (overlap position).

After that, in FIG. 14(d), the folding plate 32 rotates away from the lower guide plate 33 on the outer side. Then, the sheet 100 with the side piece 103 folded is conveyed downstream in the conveying direction F by the conveying roller pair (the driving roller 38 and the driven roller 35). By rotating the folding plate 32 at least by a predetermined angle in a direction away from the lower guide plate 33 before starting to convey the sheet 100, the sheet 100 after the folding process is separated from the folding plate and the pair of upper and lower guide plates. It is possible to smoothly convey the sheet 100 toward the downstream side in the conveying direction F of the folding position without being interfered with.

14(a) to 14(d), the upper guide plate 36 and the driven roller 35 for holding the sheet 100 on the upper guide plate 36 are provided, and the folding means folds the side piece 103 of the sheet 100. When doing so, the control device stops the driving of the pair of conveying rollers (the driving roller 38 and the driven roller 35) at the folding position, stops conveying the sheet 100, and folds the main body 102 of the sheet 100 into the above-mentioned position. The side piece 103 of the sheet 100 is controlled to be folded 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, 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 seat 100 is folded. The side piece 103 of the sheet 100 is folded while the main body 102 is held between 36 and 33 between the pair of conveying rollers. Therefore, it is possible to further ensure the accuracy of the fold position when folding the side piece 103 .

(4) The sheet 100 with the side pieces 103 folded is conveyed downstream in the conveying direction F by the conveying roller pair 85 and passes through the glue applying section 5 . In the glue applying section 5, when the folded side pieces 103 of the sheet 100 start to pass, the nozzle sections 5a and 5b installed at two locations in the width direction W perpendicular to the conveying direction F move downward. When the passage of the side piece 103 is completed, the nozzle portions 5a and 5b move upward and separate from the surface of the side piece 103. As shown in FIG. As a result, glue is applied to the surface of the folded side piece 103 . The folded side piece 103 moves the nozzles 5a and 5b while being pressed or after being pressed by the pair of transport rollers 85 positioned upstream of the nozzles 5a and 5b in the transport direction F. pass. Therefore, the glue application work by the nozzles 5a and 5b can be stably performed.

(5) The sheet 100 with glue applied to the side piece 103 is conveyed to the second folding section 6 by the conveying roller pair 85 . Since the width of the upper roller 861 of the conveying roller pair 86 is set so as not to contact the surface of the side piece 103, the glue applied to the side piece 103 of the sheet 100 in the glue applying section 5 is applied to the conveying roller. It never sticks to pair 86.

The switching portion 63 is set in a front-up posture Q in which the front is inclined upward. Therefore, as shown in FIG. 15, the sheet 100 is guided upward by the switching portion 63 so that the edge 118 of the sheet 100 passes over the surface of the upper roller 871 of the conveying roller pair 87, and It is inserted between the front guide portions 626 . When the first fold 112 of the sheet 100 reaches the position of the leading edge 621 , the control device stops the third driving section 93 . Conveyance of the sheet 100 is temporarily stopped. During this time, the folding guide 62 maintains the retracted position.

As shown in FIG. 16, the folding guide 62 is kept at the retracted position, and the switching portion 63 is switched to the parallel posture P parallel to the transport direction F. As shown in FIG.

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 portion 63 is sandwiched between the switching portion 63 and the upper guide portion 625 . The bottom piece 101 of the sheet 100 extends vertically between the rear portion of the upper roller 871 and the front guide portion 626 . The first fold 112 is brought into contact with the front edge 621, pressed and folded.

At this time, the distance between the switching portion 63 and the upper guide portion 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 portion 63 and the upper guide portion 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 driving section 93 . The sheet 100 is conveyed by the conveying roller pair 86 toward the nip 873 of the conveying roller pair 87 on the downstream side. The sheet 100 is folded at the first crease 112 by nipping the first crease 112 with the nip 873 of the conveying roller pair 87 .

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

When the sheet 100 is stacked on the stacking section 71 with the flap 104 not folded, the sheet 100 is transported to the pressing section 8 by the transport roller pair 87 . When the first fold 112 reaches the pressure unit 8 , the control device stops the third drive unit 93 . As a result, the sheet 100 is stopped from being conveyed, and the controller moves the upper die 8a in the width direction W to apply pressure to the first fold 112 . The sheet 100 is folded more reliably at the first crease 112 .

After that, the sheet 100 is discharged to the conveyor 72 by the conveying roller pair 88 . The control device controls driving of the third and fourth drive sections 93 and 94 so that the plurality of sheets 100 are shifted by a predetermined amount on the conveyor 72 and discharged in an overlapping state. The pair of conveying rollers 88 and the conveyor 72 adjust the timing at which the sheet 100 is discharged and the amount of travel of the belt 73 .

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

Since the bottom piece 101 is folded at the crease 110 set in a direction intersecting the conveying direction F, when the edge 118 of the bottom piece 101 of the sheet 100 serving as the envelope insertion opening 116 is conveyed by the belt 73, It is positioned upstream from the first fold 112 . In this case, as shown in FIG. 19, the edge 118 of the bottom piece 101 of the preceding sheet 100a collides with the first fold 112b, which is the leading portion of the following sheet 100b, and jamming may occur. .

Therefore, a fold 110 is formed by folding in a direction that intersects the conveying direction F of the belt 73 as the conveying portion, and the fold 110 is the leading edge and along the conveying direction F of the belt 73 as the conveying portion serves as the discharge portion. , the conveying surface 201 of the sheet 100 is tilted at a predetermined angle when the sheet 100 is discharged. 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 located at a position lower than the discharge height of the conveying roller pair 88, and is less likely to interfere with the first fold 112b of the following sheet 100b. Therefore, as shown in FIG. 21, the sheets 100 can be successively overlapped by a predetermined amount and conveyed. The sheet 100 on the conveyor 72 is conveyed to the stacking section 71 . Then, they are stacked vertically on the stacking tray 70 .

When stacking the stacking portion 71 with the flaps 104 folded, as shown in FIG. 18, after the first fold 112 in FIG. When the sheet 100 is conveyed downstream, the edge 117 of the flap 104 of the sheet 100 passes through the nip 863 of the pair of conveying rollers 86, and is further conveyed downstream by the radius of the upper roller 861, the control device stops the third drive section 93 . As a result, the sheet 100 is stopped from being conveyed. 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 state of being nipped by the conveying roller pair 87 and the downstream conveying roller pair 88 .

After that, the control device raises the folding guide 62 and switches the switching portion 63 to the rear upward posture U. The switching portion 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 driving section 93 to reversely rotate the pair of conveying rollers 86, 87, 88 to 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 portion 6 and the pair of conveying rollers 88 as the discharge portion is less than or equal to a predetermined value, the sheet 100 is reversely moved to fold at the second fold 113 . At this time, the bottom piece 101 may pass through the nip 883 of the conveying roller pair 88 and the edge 118 of the bottom piece 103 may be positioned downstream of the nip 883 of the conveying roller pair 88 . At this time, if the conveying surface 201 of the belt 73 for the sheet 100 is inclined in the same manner as when the flap 104 is not folded, as shown in FIG. It is easy to hang down toward the conveying surface 201 of the belt 73 . The bottom piece 101 is separated from the main body 102, the edge 118 of the bottom piece 101 is separated from the main body 102, and the contents insertion port 116 is opened.

In this state, if the sheet 100 is reversed in order to fold the sheet 100 at the second folding line 113, the edge 118 of the bottom piece 101 is not properly inserted into the nip 883 of the pair of conveying rollers 88, resulting in jamming. There is fear.

Therefore, the sheet 100 already folded in this way and having the first crease 112 formed thereon is moved in the conveying direction F of the belt 73 as the conveying section by the conveying roller pair 88 as the discharging section with the first crease 112 as the leading edge. After discharging the sheet 100 by a predetermined amount along the horizontal direction, the conveying surface 201 of the sheet 100 of the belt 73 is moved in the horizontal direction when the sheet 100 is reversed toward the upstream side to form the second fold 113 . The occurrence of jams can be suppressed by lying flat.

For this reason, the operator manually adjusts the angle of the belt 73 using the angle adjuster 79 . The operator positions the locking portion 57 on the horizontal guide portion 580 . Then, the belt 73 is brought into the lying posture by the lying portion 98 . As a result, as shown in FIG. 22, the conveying surface 201 of the belt 73 extends substantially horizontally. 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 conveying roller pair 88 . In this state, when the control device moves the conveying roller pair 88 in reverse, the edge 118 of the bottom piece 101 can be inserted into the nip 883 of the conveying roller pair 88 together with the main body 102, and the sheet 100 can be properly conveyed. .

As shown in FIG. 24 , the edge 117 of the flap 104 is guided by the switching portion 63 and conveyed upward from the front surface of the upper roller 861 . Further, 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 line 113 reaches the position of the inclined guide portion 627 of the folding guide 62 , the control device stops the third drive portion 93 to stop conveying the sheet 100 . The control device swings the switching portion 63 to the parallel position P and lowers the folding guide 62 . As a result, the sheet 100 is folded at the second folding line 113 as shown in FIG.

Then, the control device reversely rotates the conveying roller pairs 86 , 87 , 88 by rotating the third drive unit 93 in the reverse direction. The sheet 100 is reversed toward the nip 863 of the conveying roller pair 86 with the second folding line 113 leading. The sheet 100 is folded at the second fold line 113 as the second fold line 113 is nipped by the nip 863 of the conveying 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 successively pulled into the nip 863 and held there by the reverse running of the conveying roller pair 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 conveying roller pair 86, the control device stops the third driving section 93 to stop conveying the sheet 100 to the upstream side. do. After that, the control device switches the third drive unit 93 in the forward direction to drive it. The conveying roller pairs 86, 87, and 88 rotate forward to convey the sheet 100 downstream in the conveying direction F. As shown in FIG.

The edge 117 of the flap 104 is guided by the inclined guide portion 627 and inserted between the switching portion 63 and the upper guide portion 625 . The sheet 100 is conveyed downstream in the conveying direction F while being guided by both the switching portion 63 in the parallel posture P and the upper surface guide portion 62 . According to this, the sheet can be reliably transferred to the pressing portion by the nip 873 of the conveying roller pair 87 of the next stage without wrinkling or the like.

When the second fold 113 reaches the pressure unit 8 , the control device stops the third drive unit 93 . The control device moves the upper mold 8a in the width direction W to press 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 conveying roller pair 88 . As in the case where the flap 104 is not folded, the sheets 100 are shifted by a predetermined amount on the conveyor 72 and conveyed downstream one after another in a stacked state, as shown in FIG.

In FIG. 26 as well, the bottom piece 101 is folded at the first crease 111 which is the crease 110 set to intersect the conveying direction F, so that the edge 118 of the bottom piece 101 becomes the insertion opening 116 for the envelope 90 . is positioned upstream from the first fold 112 . However, since the flap 104 is folded over the bottom piece 102, as shown in FIG. 19, the edge 118 of the bottom piece 101 of the preceding sheet 100a becomes the leading portion of the succeeding sheet 100b. There is no problem that the first fold 112b collides and jams occur.

When the flap 104 shown in FIG. 27 is folded, when the subsequent sheet 100b is discharged by the conveying roller pair 88, the flap 104a of the preceding sheet 100a interferes with the first fold 112b of the succeeding sheet 100b. The succeeding sheet 100b is conveyed while the lower surface of the main body 102b of the succeeding sheet 100b is in contact with the upper surface of the flap 104a of the preceding sheet 100a stopped on the belt 73 . The subsequent 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 state in which they are shifted by a predetermined amount and overlapped.

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

As described above, the conveying device according to the present embodiment includes the belt 73 as a conveying unit that conveys the folded sheet, and the conveying roller that is installed upstream of the belt 73 and serves as a discharging unit that discharges the sheet 100 onto the belt 73. Since the pair 88 and the angle adjusting portion 79 for adjusting the angle of the conveying surface 201 of the sheet 100 of the belt 73 are provided, the leading sheet 100a and the trailing sheet 100b interfere with each other because the sheets 100 are folded. When there is a risk of jamming, the angle of the conveying surface 201 can be adjusted to avoid interference, and the sheet 100 can be properly conveyed.

Further, the angle adjusting section 79 discharges the sheet 100 folded at the fold 110 set in the direction intersecting the conveying direction F of the belt 73 as the conveying section to the belt 73 by the conveying roller pair 88 as the discharging section. When the sheet 100 is folded, the angle of the conveying surface 201 is adjusted according to the folded state of the sheet 100. Therefore, when the sheet 100 is folded in the direction intersecting the conveying direction F, the folded piece of the sheet 100 is folded. When the edge interferes with another sheet 100, the angle of the conveying surface 201 can be adjusted by the folding adjusting section 96. FIG.

When the folded sheet 100 is discharged along the conveying direction F of the belt 73 as the conveying unit by the pair of conveying rollers 88 as the discharging unit with the fold 110 as the leading edge, the folding adjusting unit 96 Since the tilting portion 97 tilts the conveying surface 201 at a predetermined angle, the tilting portion 97 tilts the conveying surface 201, thereby conveying the preceding sheet 100a downstream at a position lower than the discharge height of the conveying roller pair 88. It is possible to avoid interfering with the subsequent sheet 100b discharged by the conveying roller pair 88.

Further, in the folding adjusting unit 96, the folded sheet 100 with the first crease 112 formed thereon is moved to the belt 73 as the conveying unit by the conveying roller pair 88 as the discharging unit with the first crease 112 as the leading edge. After a predetermined amount of discharge along the conveying direction F, when the sheet is reversed toward the upstream side to form the second fold 113, a flattening portion is provided to lie down along the conveying surface in the horizontal direction. Therefore, when the sheet 100 is reversed to be folded at the second crease 113, the edge of the sheet 100 folded at the first crease 112 interferes with the conveying roller pair 88 and is not properly conveyed. Avoid jamming.

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

Further, the bag making machine according to the present embodiment applies glue to folding units 3 and 6 for folding the sheet 100 provided upstream of the belt 72 as a conveying unit and to predetermined positions of the sheet along the conveying direction of the sheet. and a conveyer 72 as a conveying device, the sheets 100 are folded at the folding units 3 and 6, and glue is applied at the glue applying unit 5 to manufacture the folded sheets. 100 can be properly transported.

Further, a folding unit provided on the upstream side of the conveying unit for folding the sheet, and a glue applying unit for applying glue to a predetermined position of the sheet along the conveying direction of the sheet. A bag making machine comprising the conveying device according to claim 1.

In the above-described embodiment, the conveyor 72 as a conveying device is installed in the receiving section 7 of the bag making machine 10, but the present invention is not limited to this, and a device without a folding section or a glue applying section may be used. Therefore, for example, the device may be a device that conveys sheets manually folded by an operator. may be carried.

Also, although the angle adjuster 79 includes the folding adjuster 96, the direction in which the sheet is folded may be parallel to the conveying direction. When a sheet folded with a fold parallel to the conveying direction is likely to interfere with the preceding and following sheets, the sheet can be properly conveyed by adjusting the angle of the conveying surface of the sheet. Further, although the conveying portion is composed of the belt 73 stretched over the front and rear rollers 74 and 75, it is not limited to this, and may be composed of one or a plurality of rollers, and conveys the sheet as necessary. A guide may be provided for guidance.

Alternatively, the sheet conveying surface may be inclined upward. As a result, by conveying the folded sheet while pressing the leading edge of the sheet against other parts of the sheet, it is possible to prevent the user from viewing the rollers and other sheets. Alternatively, only one of the tilting portion and the flattening portion may be provided.

Further, the receiving section 7 has a stacking section 71 on the downstream side of the belt 73 as a conveying section, but instead of stacking a plurality of sheets vertically, the sheets are staggered by a predetermined amount in a sashimi-like manner. good too. In this case, an angle adjustment unit may be provided so that the worker can collect the sheets as appropriate while they are still being loaded on the angle adjustable belt, so that the stacking unit may not be provided, and another conveyor may be installed on the downstream side. 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 . It should be noted 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 making Western-style envelopes, it is not limited to this, and may be Japanese-style envelopes or diamond envelopes.

10 bag making machine, 5 glue applying section, 71 stacking section, 79 angle adjusting section, 96 folding adjusting section, 97 tilting section, 98 flattening section.

Claims (11)

a conveying unit for conveying a folded sheet; a discharge unit installed on the upstream side of the conveying unit for discharging the sheet to the conveying unit; and a conveying device. The angle adjusting section adjusts the folded state of the sheet when the sheet folded at the fold set in the direction intersecting the conveying direction of the conveying section is discharged to the conveying section by the discharging section. 2. The conveying apparatus according to claim 1, further comprising a folding adjustment section that adjusts the angle of the conveying surface according to the angle of the conveying surface. The folding adjusting section includes a tilting section that tilts the conveying surface by a predetermined angle when the folded sheet is discharged by the discharging section along the conveying direction of the conveying section with the folded sheet at the top. 3. The transport device of claim 2, comprising: The folding adjustment unit discharges a predetermined amount of the sheet, which has been folded and formed with the first fold, by the discharge unit along the conveying direction of the conveying unit with the first fold leading, 4. The sheet according to claim 2 or 3, further comprising a flattening portion that flattens the conveying surface along the horizontal direction when the sheet is reversed toward the upstream side to form the second fold. Conveyor. The conveying apparatus according to any one of claims 1 to 4, further comprising a stacking section for vertically stacking the plurality of sheets on the downstream side of the conveying section. a folding unit provided on the upstream side of the conveying unit for folding the sheet; A bag making machine comprising the conveying device according to the above item. A sheet conveying method for conveying a folded sheet by a conveying unit, wherein when the sheet is discharged toward the conveying unit from a discharging unit installed upstream of the conveying unit, the sheet is folded. A sheet conveying method for conveying the sheet by the conveying unit in which the angle of the conveying surface of the sheet is adjusted according to a state. The sheet is folded at the crease set in the direction intersecting the conveying direction of the conveying section to form the crease, and the sheet is discharged by the discharging section along the conveying direction of the conveying section with the crease as the leading edge. 8. The sheet conveying method according to claim 7, wherein the conveying surface is tilted at a predetermined angle when the sheet is discharged. To form a second fold after discharging a predetermined amount of the folded sheet on which the first fold is formed by the discharging unit along the conveying direction of the conveying unit with the first fold leading. 9. The method of conveying a sheet according to claim 7, wherein when the sheet is caused to travel backward toward the upstream side, the conveying surface is flattened along the horizontal direction. 10. The conveying method according to claim 7, wherein the plurality of sheets conveyed from the conveying unit are vertically stacked on a stacking unit provided downstream of the conveying unit. The glue applying section applies glue to a predetermined position of the sheet along the sheet conveying direction, the sheet is folded by the folding section, and the glue is applied by the conveying method according to any one of claims 7 to 10. A bag-making method for conveying the coated and folded sheet.

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