WO2018186289A1

WO2018186289A1 - Sheet folding apparatus and method for manufacturing folded body

Info

Publication number: WO2018186289A1
Application number: PCT/JP2018/013572
Authority: WO
Inventors: 山下　実; 正男五十畑; 忠博加藤
Original assignee: 株式会社ｍｉｕｒａ－ｏｒｉｌａｂ
Priority date: 2017-04-04
Filing date: 2018-03-30
Publication date: 2018-10-11
Also published as: JP6358683B1; JP2018177382A

Abstract

This method 10 for manufacturing a folded body comprises: a feeding step 12 for feeding a flat sheet S1; a wave-folding step 14 for folding the flat sheet S1 at wavy fold lines BL1; and a parallel folding step 16 for folding, at parallel fold lines BL2, the wave-folded sheet S2 obtained by the wave-folding step 14. The wave-folding step 14 comprises a curving step 14A for curving predetermined portions of the flat sheet S1 and a pressing step 14B for pressing the curved portions of the flat sheet S1. The parallel folding step 16 comprises a bending step 16A for bending the wave-folded sheet S2 at the positions where the parallel fold lines BL2 are set and a folding step 16B for folding the bent wave-folded sheet S2.

Description

Sheet folding apparatus and method for manufacturing folded body

The present invention relates to a sheet folding apparatus and a method for manufacturing a folded body.

In modern times, very many documents are almost one size A4 size. However, since various information needs to be described, there is an increasing demand for documents that can be viewed in a large format, such as maps, blueprints, and manuals. The large format often requires folding after output for carrying and storage. Accordingly, there is an increasing demand for instruments that fold documents in a small size.

Among the various folding structures, the folding structure called Miura folding (registered trademark) has unique properties such as unfolding / storing property, strength, and memory of the folds compared to the ordinary bellows folding structure (patented) References 1-2).

JP 2008-284860 JP 2009-51620

In order to create a folding structure called Miura folding (registered trademark), it is necessary to fold the sheet as a raw fabric with a wavy fold. However, even if the folding process is performed using a machine, there are problems such as a case where the folding process is not performed or the sheet is torn, and thus automation is difficult. For this reason, the folding structure cannot be produced efficiently and in large quantities, and there has been a limit to popularizing Miura folding with excellent characteristics in the market.

In view of such circumstances, the present invention intends to provide a sheet folding apparatus and a method for manufacturing a folded body that can efficiently mass-produce the folded body.

The present invention provides a sheet, a first sheet portion, a second sheet portion separated from the first sheet portion in the sheet conveying direction, and an intermediate sheet between the first sheet portion and the second sheet portion. And the wavy crease are defined to include both a crease position before the crease is provided on the sheet and a fold line provided on the sheet, and the intermediate sheet portion is defined by the wavy crease. The folding sheet folding device, wherein the wavy folds are a plurality of line segments connected in a zigzag shape, extend so as to intersect the transport direction, and are arranged at a predetermined interval in the transport direction, A one-side bending unit that bends the wavy fold of the intermediate sheet portion to one side; and a folding unit that folds the curved wavy fold; and the one-side bending unit includes: An upstream roller pair capable of gripping and feeding one sheet portion, a downstream roller pair capable of gripping and feeding the second sheet portion, and the upstream roller on the other side with respect to the conveyance path A guide member disposed between the pair and the downstream roller pair, and a control device that controls each unit, the control device including the upstream drive roller and the downstream roller pair forming the upstream roller pair. And a downstream drive roller that individually rotates in the forward and reverse directions, the guide member includes a ridge line that protrudes toward the conveyance path, and the control device includes the intermediate fold that includes the wavy fold. Feeding the first sheet part downstream in the transport direction by the upstream roller pair and feeding the second sheet part upstream in the transport direction by the downstream roller pair so that the sheet part is curved. And do The ridge is characterized by well as regulating the curvature of the intermediate sheet portion to the other side, is intended to encourage the curvature of the intermediate sheet portion to the one side.

The present invention provides a sheet, a first sheet portion, a second sheet portion separated from the first sheet portion in the sheet conveying direction, and an intermediate sheet between the first sheet portion and the second sheet portion. And the wavy crease are defined to include both a crease position before the crease is provided on the sheet and a fold line provided on the sheet, and the intermediate sheet portion is defined by the wavy crease. The folding sheet folding device, wherein the wavy folds are a plurality of line segments connected in a zigzag shape, extend so as to intersect the transport direction, and are arranged at a predetermined interval in the transport direction, A one-side bending unit that bends the wavy fold of the intermediate sheet portion to one side; and a folding unit that folds the curved wavy fold; and the one-side bending unit includes: An upstream clamp member capable of gripping one sheet portion, a downstream clamp member capable of gripping the second sheet portion, and the upstream clamp member and the downstream side on the other side of the conveyance path A guide member disposed between the clamp members; and a control device that controls each unit. The guide member includes a ridge line that protrudes toward the conveyance path, and the control device includes the wavy fold line. At least one of the upstream clamp member and the downstream clamp member is moved so that a relative distance between the upstream clamp member and the downstream clamp member is reduced so that the intermediate sheet portion including the curved portion is curved. The ridge line restricts the bending of the intermediate sheet portion to the other side and promotes the bending of the intermediate sheet portion to the one side.*

The folding unit includes a press unit that presses the curved wavy fold, and the press unit is a first press disposed on both sides so as to sandwich the first line segment that forms the wavy fold. And a second press pair disposed on both sides so as to sandwich the second line segment that forms the wavy fold, and the second press pair is arranged in the longitudinal direction of the wavy fold. It is preferable that the first press pair and the second press pair are arranged next to the first press pair so as to be separated from each other so as to escape the bent portion of the wavy fold.

The present invention provides a sheet, a first sheet portion, a second sheet portion separated from the first sheet portion in the sheet conveying direction, and an intermediate sheet between the first sheet portion and the second sheet portion. And the wavy crease are defined to include both a crease position before the crease is provided on the sheet and a fold line provided on the sheet, and the intermediate sheet portion is defined by the wavy crease. The folding sheet folding device, wherein the wavy folds are a plurality of line segments connected in a zigzag shape, extend so as to intersect the transport direction, and are arranged at a predetermined interval in the transport direction, A one-side bending unit that bends the wavy fold of the intermediate sheet portion to one side; and a folding unit that folds the curved wavy fold; A press unit configured to press the wavy fold; and the press unit forms the wavy fold with a first pair of presses arranged on both sides so as to sandwich the first line segment forming the wavy fold. A second press pair disposed on both sides so as to sandwich the second line segment, and the second press pair is adjacent to the first press pair with respect to the longitudinal direction of the wavy fold. The first press pair and the second press pair are arranged apart from each other so as to escape the bent portion of the wavy fold.

When a parallel crease is defined as including both a crease position before the crease is provided on the sheet and a crease line provided on the sheet, the parallel crease is a predetermined interval in the longitudinal direction of the wavy crease. Are parallel to each other and pass through the bent portion of the wavy fold, and the clamping member includes a main support member that touches the valley fold line of the parallel fold, and both adjacent to the main support member in the longitudinal direction of the wavy fold. And a secondary support member that touches the sheet from the side opposite to the primary support member, and the primary support member and the secondary support member sandwich the valley fold line portion of the sheet. It is preferable that it is relatively movable.

The present invention provides a sheet, a first sheet portion, a second sheet portion separated from the first sheet portion in the sheet conveying direction, and an intermediate sheet between the first sheet portion and the second sheet portion. And a wavy fold is a sheet folding device that folds the intermediate sheet portion with the wavy fold when defined as a fold line provided on the sheet, wherein the wavy fold has a plurality of line segments. A one-side bending unit that is continuous in a zigzag shape, extends so as to intersect the conveyance direction, and is arranged at a predetermined interval in the conveyance direction, and curves the wavy fold of the intermediate sheet portion to one side. And a folding unit that folds at the curved wavy fold, and the one-side bending unit includes an upstream roller pair capable of gripping and feeding the first sheet portion, and the second sheet. A downstream roller pair capable of gripping and feeding a part, a guide member disposed on the other side of the conveyance path and between the upstream roller pair and the downstream roller pair, and each unit is controlled And a control device capable of individually rotating the upstream drive roller forming the upstream roller pair and the downstream drive roller forming the downstream roller pair in forward and reverse directions. The guide member includes a ridge line that protrudes toward the conveyance path, and the control device is configured so that the intermediate sheet portion including the wavy fold is curved. Feeding to the downstream side in the transport direction and feeding of the second sheet portion to the upstream side in the transport direction by the downstream roller pair are performed, and the ridge line curves the intermediate sheet portion to the other side. To regulate Further, the bending of the intermediate sheet portion to the one side is promoted, and the folding unit is configured such that the wavy fold is bent through the control of the upstream roller pair and the downstream roller pair by the control device. The first curved state and the second curved state in which the wavy fold is curved to be larger than the first curved state are alternately switched.

The present invention provides a sheet, a first sheet portion, a second sheet portion separated from the first sheet portion in the sheet conveying direction, and an intermediate sheet between the first sheet portion and the second sheet portion. And a wavy fold is a sheet folding device that folds the intermediate sheet portion with the wavy fold when defined as a fold line provided on the sheet, wherein the wavy fold has a plurality of line segments. A one-side bending unit that is continuous in a zigzag shape, extends so as to intersect the conveyance direction, and is arranged at a predetermined interval in the conveyance direction, and curves the wavy fold of the intermediate sheet portion to one side. And a folding unit that folds at the curved wavy fold, wherein the one-side bending unit includes an upstream clamp member capable of gripping the first sheet portion, and the second sheet portion. A downstream clamp member capable of gripping, a guide member disposed on the other side of the conveyance path and between the upstream clamp member and the downstream clamp member, and a control device for controlling each unit The guide member includes a ridge line projecting toward the conveyance path, and the control device includes the upstream clamp member and the downstream side so that the intermediate sheet portion including the wavy fold is curved. At least one of the upstream clamp member and the downstream clamp member is moved so that the relative distance to the clamp member is small, and the ridge line regulates the curvature of the intermediate sheet portion to the other side. Urging the intermediate sheet portion to the one side, and the folding unit includes the upstream clamping member and the downstream clutch by the control device. Via the control of the clamp member, switching is alternately performed between a first curved state in which the wavy fold is curved and a second curved state in which the wavy fold is curved larger than the first curved state. It is characterized by. *

The present invention provides a first sheet portion, a second sheet portion separated from the first sheet portion in the sheet conveyance direction, and a first sheet portion between the first sheet portion and the second sheet portion. When the intermediate sheet portion and the wavy fold are defined to include both a fold position before the fold is provided to the sheet and a fold line provided to the sheet, respectively, the sheet is applied to the wavy fold. A method of manufacturing a folded body that is folded, wherein the wavy folds are formed by a plurality of line segments connected in a zigzag shape, extend so as to intersect the transport direction, and are arranged at predetermined intervals in the transport direction. A one-side bending step for bending the first intermediate sheet portion to one side, and a one-side folding step for folding at the wavy fold curved to the one side. In the bending step, with the first intermediate sheet portion facing the other side guide member disposed on the other side with respect to the sheet conveyance path, the second sheet portion is conveyed upstream and 1 sheet part is conveyed to the downstream side, and the other side guide member is provided with the other side ridge line protruding toward the conveyance path, and the other side ridge line is a curve of the intermediate sheet part to the other side. And the bending of the intermediate sheet portion to the one side is facilitated. In the one-side folding step, a press unit disposed on one side is used with reference to the sheet conveyance path. Press working is performed on the wavy crease of the first intermediate sheet portion curved to the side.

Among the sheets, when defining a third sheet portion separated from the second sheet portion in the transport direction, and a second intermediate sheet portion between the second sheet portion and the third sheet portion, respectively, A second bending step for bending the second intermediate sheet portion to the other side; and a second folding step for folding the second intermediate sheet portion at the wavy fold curved to the other side. In the second bending step, the sheet conveyance path In the state where the second intermediate sheet portion is opposed to the one side guide member arranged on one side with reference to the reference, the conveyance to the upstream side of the third sheet portion and the conveyance to the downstream side of the second sheet portion The one-side guide member includes a one-side ridge line that protrudes toward the conveyance path, and the one-side ridge line regulates the curvature of the intermediate sheet portion toward the one side and moves toward the other side. The middle of The second side folding step of the second intermediate sheet portion curved to the other side using a press unit disposed on the other side with respect to the sheet conveyance path. It is preferable to press the wavy crease. It is preferable that the conveyance of each sheet portion performed for bending each intermediate sheet portion is performed by rotation of a roller that grips the sheet portion or movement of a clamp member that grips the sheet portion. Furthermore, it is preferable that the press unit is provided with a linear press mark so as to escape the bent portion of the wavy fold.

The present invention provides a first sheet portion, a second sheet portion separated from the first sheet portion in the sheet conveyance direction, and a first sheet portion between the first sheet portion and the second sheet portion. The intermediate sheet portion and the wavy fold are a fold line provided in the sheet, and a method for manufacturing a folded body in which the sheet is folded by the wavy fold when defined. Are lined in a zigzag shape, extend so as to intersect the transport direction, and are arranged at a predetermined interval in the transport direction, and one side that curves the first intermediate sheet portion to one side A bending step and a one-side folding step that folds at the wavy crease curved to the one side, and the one-side bending step is arranged on the other side with reference to the sheet conveyance path. With the first intermediate sheet portion facing the side guide member, the second sheet portion is conveyed upstream and the first sheet portion is conveyed downstream, and the other side guide member is The other side ridge line that protrudes toward the conveyance path regulates the bending of the intermediate sheet portion toward the other side and promotes the bending of the intermediate sheet portion toward the one side. And in the one-side folding step, a first curved state in which the wavy fold of the first intermediate sheet portion is curved, and a second curved state in which the wavy fold is curved more than the first curved state. Are alternately switched between and.

Among the sheets, when defining a third sheet portion separated from the second sheet portion in the transport direction, and a second intermediate sheet portion between the second sheet portion and the third sheet portion, respectively, A second bending step for bending the second intermediate sheet portion to the other side; and a second folding step for folding the second intermediate sheet portion at the wavy fold curved to the other side. In the second bending step, the sheet conveyance path In the state where the second intermediate sheet portion is opposed to the one side guide member arranged on one side with reference to the reference, the conveyance to the upstream side of the third sheet portion and the conveyance to the downstream side of the second sheet portion The one-side guide member includes a one-side ridge line that protrudes toward the conveyance path, and the one-side ridge line regulates the curvature of the intermediate sheet portion toward the one side and moves toward the other side. The middle of The second folding step of the second intermediate sheet portion is more curved than in the first curved state, and in the other side folding step, the wavy fold is bent more than the first curved state. It is preferable to switch alternately between the second curved state that is largely curved.

When a parallel crease is defined as including both a crease position before the crease is provided on the sheet and a crease line provided on the sheet, the parallel crease is a predetermined interval in the longitudinal direction of the wavy crease. The sheet is arranged in parallel with each other and passes through the bent portion of the wavy fold, and the first fold is applied to the sheet in which the mountain fold and the valley fold are alternately performed on the wavy fold in the longitudinal direction of the parallel fold. The first pressing member is pressed against the valley fold line of the first parallel fold from the side of the first fold, and the first fold on the opposite side to the first fold with respect to the parallel fold adjacent to the first parallel fold. A pressing step of pressing the second pressing member against the valley fold line from the side 2, and the zigzag sheet that is pressed by the first pressing member and the second pressing member. And said A sandwiching step for sandwiching the sheet using the press members disposed on both sides of the sheet in the longitudinal direction of the fold-like fold, and after the sandwiching step, the pressing member is released together with the release of the pressing by the pressing member And a folding step of folding the sheet using.

In the sheet folding apparatus according to the present invention, when the parallel fold is defined as including both the fold position before the fold is provided on the sheet and the fold line provided on the sheet, the wavy fold includes a plurality of line segments. Are arranged in a zigzag manner and extend in a predetermined direction and are arranged at intervals in a direction intersecting the predetermined direction, and the parallel folds are arranged in parallel at a predetermined interval in the longitudinal direction of the wavy folds. From the first side to the sheet that passes through the bent portion of the wavy fold and is alternately fold-folded and valley-folded in the longitudinal direction of the parallel fold from the first side. A first pressing member that presses against a valley fold line of the parallel fold, and a valley fold from a second side opposite to the first side with respect to the parallel fold adjacent to the first parallel fold. On the line A second pressing member to be pressed, a pressing member moving unit that performs relative movement between the first pressing member and the second pressing member, the first pressing member, and the second pressing A folding unit that folds the sheet in a bent state by pressing against a member, wherein the pressing member moving unit positions the first pressing member between the plurality of second pressing members. It is possible to switch between a first state to be switched and a second state withdrawn from the first state.

The first pressing member and the second pressing member are formed in a plate shape, and the first pressing member supports the pressing line on the valley fold side located at the center of the sheet. The pressing member moving unit is configured to individually move the first pressing member and the second pressing member with respect to the thickness direction of the plate and the surface direction of the plate, and the pressing member moving unit. It is preferable that the first pressing member and the second pressing member approach in the thickness direction and approach in the plate surface direction due to relative movement.

The folding unit includes a pair of press blocks having a press surface for pressing the sheet, and a press block moving mechanism for performing relative movement of the pair of press blocks, and a plurality of the second pressing members. Is arranged between the pair of press blocks, and the press block moving mechanism brings the press block closer from both sides of the first pressing member when the first pressing member is in the first state. It is preferable.

The first pressing member and the second pressing member have a contact side that touches the sheet, and the contact side is inclined with respect to the placement surface on which the sheet is placed. It is preferable.

According to the present invention, the folded body can be mass-produced efficiently.

(A) is a top view which shows the outline | summary of a folding structure, (B) is a top view which shows the outline | summary of a folding body. It is a flowchart which shows the outline | summary of the manufacturing method of a folding body. (A) is a plan view showing an outline of a flat sheet, and (B) is a sectional view taken along the line IIIa-IIIa ′ showing an outline of the flat sheet. It is a perspective view which shows the outline | summary of a wave folding sheet | seat. It is explanatory drawing which shows the outline | summary of the manufacturing equipment of folding structure. (A) is a side view which shows a bending unit and a press unit, (B) is a top view which shows a bending unit and a press unit. (A) is a side view which shows a bending unit and a press unit, (B) is a top view which shows a bending unit and a press unit. (C) is a top view which shows the outline | summary of the flat sheet in which the press trace was formed by the press process. (A) to (I) are side views showing a bending unit and a press unit. (A)-(D) are side views showing a bending unit. (A)-(B) are side views showing a folding unit. (A)-(B) are side views showing a folding unit. It is explanatory drawing which shows the outline | summary of a bending process. (A) to (D) are side views showing another embodiment of the bending unit. (A)-(C) are sectional views showing another embodiment of the temporary storage unit.

As shown in FIG. 1A, a folding structure 2 called Miura folding (registered trademark) includes a sheet S, a wavy fold BL1 formed on the sheet S, a parallel fold BL2 formed on the sheet S, Is provided. The wavy fold BL1 extends in the vertical direction, and the parallel fold BL2 extends in the horizontal direction. The wavy crease BL1 and the parallel crease BL2 intersect each other. When the sheet S is alternately folded and folded at the wavy fold BL1, and then alternately folded and folded at the parallel fold BL2, the sheet S can be folded compactly (see FIG. 1B). A foldable body 4 shown in FIG. 1B is a foldable structure 2 that is folded at a wavy fold BL1 or a parallel fold BL2. Since such a foldable body 4 has a special fold structure 2 such as Miura fold (registered trademark), it exhibits excellent characteristics in unfolding / storing property, strength, fold memory, and the like.

As shown in FIG. 2, the folded body manufacturing method 10 includes at least a feeding step 12 for feeding the flat sheet S1, a wave folding step 14 for folding the flat sheet S1 at the wavy fold BL1, and a wave folding step 14. A parallel folding step 16 of folding the wave folded sheet S2 obtained by the above process at the parallel fold BL2.

The flat sheet S1 may be paper, plastic, metal or the like. *

The wave folding step 14 includes a bending step 14A for bending a predetermined portion of the flat sheet S1, and a pressing step 14B for pressing the curved portion of the flat sheet S1. By the wave folding step 14, the wave folded sheet S2 (see FIG. 4) can be obtained from the flat sheet S1 (see FIG. 3). The flat sheet S1 shown in FIG. 3 has a flat sheet body S11, a plurality of wavy folds BL1 formed in the sheet body S11, and a plurality of parallel folds BL2. The wavy folds BL1 and the parallel folds BL2 are arranged at a predetermined pitch in the sheet body S11. The wavy fold BL1 here has a zigzag shape, but the bending angle and the interval between the bending positions are predetermined. The wavy folds BL1 and the parallel folds BL2 can be formed on the flat sheet S1 by a predetermined pressing process.

The corrugated sheet S2 shown in FIG. 4 is formed by alternately folding valley folds and mountain folds at a plurality of corrugated folds BL1 in the flat sheet S1.

2, the parallel folding step 16 includes a bending step 16A for bending the wave folding sheet S2 at the set position of the parallel fold BL2, and a folding step 16B for folding the wave folding sheet S2 in a bent state. The setting position of the parallel fold BL2 is set to be a predetermined pitch. By the parallel folding step 16, the folded body 4 (see FIG. 1) can be obtained from the wave folded sheet S2 (see FIG. 4).

As shown in FIG. 5, the folding structure manufacturing equipment 20 includes a delivery unit 30 in which a delivery process 12 is performed, a bending unit 40 in which a bending process 14A is performed, a press unit 50 in which a pressing process 14B is performed, and a bending process. The bending unit 60 in which 16A is performed, the folding unit 70 in which the folding process 16B is performed, the accommodating unit 80 that accommodates the folding structure 2 obtained by the folding unit 70, and each part of the units 30 to 80 are individually controlled. And a control unit 90.

The delivery unit 30 includes a case 31 in which the flat sheet S1 is accommodated in a stacked state, a suction cup 32 movable in each of three directions of the feed direction X, the width direction Y, and the height direction Z, and an exhaust connected to the suction cup 32. A pump (not shown) and a conveyance roller 35 for feeding the flat sheet S1 to the bending unit 40 are provided.

As shown in FIGS. 5 to 7, the bending unit 40 includes a drive roller 41, a driven roller 42, a motor (not shown) for driving the drive roller 41, and a temporary storage unit 44 for temporarily storing the wave folded sheet S2. Prepare. The control unit 90 controls the drive roller 41 through motor control. The drive rollers 41 are arranged at a predetermined pitch in the feed direction X. The driven roller 42 is disposed so as to face the driving roller 41. The pair of driving roller 41 and driven roller 42 can be conveyed in a predetermined direction while gripping the flat sheet S1. In the manufacturing apparatus 20 having a folding structure shown in the figure, three pairs of roller pairs including a driving roller 41 and a driven roller 42 are arranged at a predetermined pitch. Thus, the conveyance path R1 for the flat sheet S1 is formed in the bending unit 40 by the two pairs of rollers. The conveyance path R 1 extends to the temporary storage unit 44.

Here, when it is desired to feed the flat sheet S1 in the feeding direction X, the three driving rollers 41 may be rotated (forward rotation) in the same direction (see FIGS. 8A and 8I). Here, when the rotation direction of the driving roller 41 on the most downstream side among the three driving rollers 41 is rotated (reversed) in the reverse direction, the flat sheet S1 is driven to the middle driving roller 41 and the most downstream driving roller 41. In the clearance CL2 (see FIGS. 6 and 8B). On the other hand, when the flat sheet S1 is to be sent to the opposite side of the feeding direction X (when it is desired to return), the three driving rollers 41 may be reversed. Here, when the rotation direction of the drive roller 41 on the most upstream side among the three drive rollers 41 is rotated in the normal direction, the flat sheet S1 is in the gap CL1 between the drive roller 41 on the most upstream side and the drive roller 41 in the middle. And curved upward (see FIG. 8F).

As shown in FIGS. 5 to 7, the press unit 50 is disposed between the roller pair including the driving roller 41 and the driven roller 42 in the feeding direction X, respectively. When three pairs of rollers are provided, the press unit 50 is disposed at a position higher than the transport path R1 in the upstream gap CL1, and the lower gap CL2 is positioned at a position lower than the transport path R1. A press unit 50 is arranged. Thus, a gap K1 is formed from each roller pair to the press unit 50 to such an extent that the flat sheet S1 can be bent (see FIG. 6). The press unit 50 may be disposed at a position lower than the transport path R1 in the gap CL1, and the press unit 50 may be disposed at a position higher than the transport path R1 in the gap CL2.

The press unit 50 has a press pair 51 that can be freely opened and closed. As shown in FIGS. 6 to 7, the press pair 51 includes a pair of pressing tools arranged in the feed direction X, and is arranged at a predetermined pitch in the width direction Y of the transport path R1. The pitch is preferably set such that the press surface 51F of the press pair 51 escapes from the bent portion T1 (see FIG. 1) of the wavy fold BL1. Moreover, it is preferable that the press surface 51F respond | corresponds to the center part of line segment L1 (refer FIG. 1) of wavy fold BL1. For this reason, the press marks PK1 forming the wavy fold line BL1 are arranged at a predetermined pitch in the width direction Y as shown in FIG.

Further, the press surface 51F is inclined with respect to the width direction Y. Furthermore, regarding the press pair 51 adjacent in the width direction Y, each press surface 51F has faced the alternate direction. Thus, the wavy fold BL1 can be formed using the press pair 51. Further, since the press surface 51F of the press pair 51 escapes from the bent portion T1 (see FIG. 1) of the wavy fold BL1, the flat sheet S1 can be prevented from being creased, wrinkled or torn during the operation of the press pair 51. Therefore, it is preferable to prepare the number of press pairs 51 in the width direction Y by the number of line segments L1 (see FIG. 1) forming the wavy crease BL1.

The bending unit 40 preferably further includes a guide plate 47. The guide plate 47 regulates the direction in which the flat sheet S1 is bent, and is arranged in each of the gap CL1 and the gap CL2. The guide plate 47 is formed in a plate shape and extends in the width direction Y. The guide plate 47 preferably has a protruding ridge line 47T in the middle of the feed direction X. The protruding ridge line 47T protrudes toward the transport path R1 and extends in the width direction Y.

The guide plate 47 disposed in the gap CL1 is disposed so as to face the press unit 50 via the transport path R1. Similarly, the guide plate 47 disposed in the gap CL2 is disposed so as to face the press unit 50 via the transport path R1. The guide plate 47 prevents the flat sheet S1 from bending toward the guide plate 47 with reference to the conveyance path R1. According to the guide plate 47, when the flat sheet S1 is about to be bent, it is possible to promote the bending toward the press unit 50 side.

As shown in FIGS. 5 and 9, the bending unit 60 conveys the wave folded sheet S2 to the folding unit 70 and performs the bending step 16A, and is a main support bar that touches one surface of the wave folded sheet S2. 61, a main drive unit 62 that drives the main support bar 61, a slave support 63 that touches the other surface of the corrugated sheet S2, and a slave drive unit 64 that drives the slave support 63.

The main support bar 61 touches the valley fold line of the parallel fold BL2. The sub support tool 63 includes a left support bar and a right support bar. In the width direction Y, the left support bar is arranged so as to escape to the left as viewed from the valley fold line. The right support bar is arranged so as to escape to the right side in the width direction Y when viewed from the valley fold line. By means of the main drive unit 62 and the slave drive unit 64, the main support bar 61 is movable between the left support bar and the right support bar of the slave support 63. The main support bar 61, the left side support bar, and the right side support bar are all formed in a cylindrical shape. The shapes of the main support bar 61, the left support bar, and the right support bar do not have to be cylindrical, but the portion that touches the corrugated sheet S2 is preferably a convex curved surface. A pair of the main support bar 61 and the sub support tool 63 is preferably provided for each valley fold line of the parallel fold line BL2.

The main drive unit 62 makes the main support rod 61 movable in three axis directions (for example, the feed direction X, the width direction Y, and the height direction Z). Similarly, the slave drive unit 64 allows the slave support 63 to move in three axis directions (for example, the feed direction X, the width direction Y, and the height direction Z). By the main drive unit 62 and the sub drive unit 64, the pair of the main support bar 61 and the sub support tool 63 sandwiches the folded sheet S2 (see FIGS. 9A to 9C), and the sandwiched state. While maintaining, the conveyance state which conveys to the mounting stage 71 (refer FIG. 5) of the folding unit 70, and the bending state bent by the valley fold line of the parallel fold line BL2 in the mounting stage 71 (FIG. 9D). Switching) and a retracted state away from the wave folded sheet S2.

It is preferable that the portion of the main support bar 61 that touches the folded sheet S2 intersects the portion of the sub-support 63 that contacts the folded sheet S2. In particular, the distance CLx between the main support bar 61 and the sub support tool 63 (see FIG. 5) from the side closer to the mounting stage 71 (ie, the lower side) of the folding unit 70 toward the far side (ie, the upper side). ) Is preferably large. As a result, when the corrugated sheet S2 is folded using the main support bar 61 and the sub-supporting tool 63, the tension caused by the folding can be released upward, so that curling, wrinkling and tearing of the corrugated sheet S2 are suppressed. The folding step 16B can be performed smoothly. In FIG. 5, the portion of the main support bar 61 that touches the wavy sheet S 2 is oblique to the height direction Z, and the portion of the sub-support 63 that touches the wavy sheet S 2 is in the height direction. Parallel to Z. Note that the portion of the secondary support 63 that touches the corrugated sheet S2 may be oblique to the height direction Z.

As shown in FIGS. 5 and 10, the folding unit 70 has both a work stage for the placing stage 71 having a work area for placing the wave folding sheet S2 and the wave folding sheet S2 placed in the work. A press block 72 sandwiched from the outside and a bending structure 75 for bending the wave folded sheet S2 placed in the work are provided.

The press blocks 72 are arranged in pairs on the mounting stage 71. The pair of press blocks 72 can be moved to predetermined positions in the width direction Y by the control unit 90.

The bending structure 75 includes a rotating arm 75A that is disposed on the upper portion of the press block 72 and extends in the XY plane, a support bar 75B that extends downward from the tip of the rotating arm 75A, and a pressing plate disposed in the X direction. 75D. The pivot arm 75A is pivotable about a pivot axis AX1 extending in the height direction Z. The pressing plate 75D is movable in the feed direction X and the width direction Y. By the control unit 90, the support rod 75B is rotated about the rotation axis AX1, and the pressing plate 75D is movable to a predetermined position in the feed direction X and the width direction Y.

The accommodation unit 80 accommodates the folding body 4 obtained by the folding unit 70, and is an opening / closing door 81 formed in the opening of the work area of the placement stage 71 and an internal space of the placement stage 71. And a storage space 82 communicating with the external space via the opening / closing door 81. The open / close door 81 may be omitted.

Next, the manufacturing method 10 of the folded body in the manufacturing equipment 20 of the folding structure will be described.

(Sending process)
As shown in FIG. 5, the delivery unit 30 places the suction cup 32 on the flat sheet S1 at the uppermost position among the flat sheets S1 in the laminated state. When the exhaust pump is driven in this state, the suction cup 32 sucks the uppermost flat sheet S1 and conveys it to the conveying roller 35. Thereafter, the suction by the suction cup 32 is released by setting the pressure of the suction cup 32 to atmospheric pressure, and the flat sheet S 1 is placed on the conveyance roller 35. The conveying roller 35 sends the flat sheet S1 to the bending unit 40.

(Curving process and pressing process)
When the three drive rollers 41 are rotated in the same direction (forward rotation) in the bending unit 40, the flat sheet S1 is fed in the feeding direction X (see FIG. 8A). When the valley fold position of the wavy fold line BL1 is located in the gap CL2, the two upstream drive rollers 41 are rotated in the forward direction and the most downstream drive roller 41 is rotated in the reverse direction (see FIG. 8B). As a result, the portion of the flat sheet S1 located in the gap CL2 (that is, the portion facing the guide plate 47) is curved below the transport path R1 by the guide plate 47. When the curved portion of the flat sheet S1 reaches the press area of the press unit 50, the press pair 51 is closed (see FIG. 8C). Thereby, the flat sheet S1 is folded at the valley fold line of the wavy fold BL1. Thereafter, when the press pair 51 is opened and the rotational direction method of the three drive rollers 41 is changed, the flat sheet S1 is stretched back and forth in the feed direction X, and the curved state is released (FIGS. 8D to 8D). E)).

Next, the three driving rollers 41 are rotated in a predetermined direction so that the mountain fold position of the wavy fold BL1 reaches the gap CL1. One drive roller 41 on the most upstream side is rotated forward and two drive rollers 41 on the downstream side are rotated reversely (see FIG. 8F). As a result, the portion of the flat sheet S1 positioned in the gap CL1 (that is, the portion facing the guide plate 47) is curved upward from the transport path R1 by the guide plate 47. When the curved portion of the flat sheet S1 reaches the press area of the press unit 50, the press pair 51 is closed (see FIG. 8G). In the pressing step, it is preferable that the wavy fold BL1 is located at the curved portion. Thereby, the flat sheet S1 is folded at the mountain fold line of the wavy fold BL1. Thereafter, when the press pair 51 is opened and the rotation direction of the three drive rollers 41 is changed, the flat sheet S1 is stretched back and forth in the feed direction X, and the curved state is released (FIGS. 8H to (I)). reference).

Thus, in the bending unit 40, the wave folding sheet S2 can be obtained by alternately performing the valley folding operation and the mountain folding operation. Here, the mountain folding operation is performed after the valley folding operation, but the present invention is not limited to this, and the valley folding operation may be performed after the mountain folding operation.

Here, when the flat sheet S1 is folded using the press unit 50, both ends of the curved portion are gripped by the driving roller 41 and the driven roller 42, and the intermediate portion thereof is not restricted by other members. Curved in a free state. That is, the curved portion can be deformed in the feed direction X. Since the press processing is performed on the curved portion in such a state, the flat sheet S1 is less likely to be creased, wrinkled or torn. Similarly, since the press units 50 are arranged at a predetermined pitch in the width direction Y, the curved portion is deformable in the width direction Y. Since the press processing is performed on the curved portion in such a state, the flat sheet S1 is less likely to be creased, wrinkled or torn.

(Bending process)
In the bending unit 60, the pair of the main support bar 61 and the sub support tool 63 sandwich the corrugated sheet S 2 by the main drive unit 62 and the sub drive unit 64 (see FIG. 9). Here, since the press surface 51F of the press pair 51 escapes from the intersection T1 (see FIG. 1) of the wavy fold BL1, an unpressed portion remains in the set portion of the wavy fold BL1. At this time, it is preferable that the main support bar 61 touches the unpressed portion. Thereby, the bending process 16A can be smoothly performed while suppressing curling, wrinkling, and tearing of the folded sheet S2.

In addition, it is preferable that the corrugated sheet S2 sandwiched between the pair of the main support bar 61 and the sub support tool 63 is in a bent zigzag state at the set position of the parallel fold BL2. Thereby, the folding process 16B by the pinching structure 72 can be smoothly performed while suppressing curling, wrinkling, and tearing of the wave folded sheet S2.

(Folding process)
Next, the main drive unit 62 and the sub drive unit 64 convey the pair of the main support bar 61 and the sub support tool 63 to the mounting stage 71. The pressing plate 75D is pressed from both sides in the feed direction X toward the valley fold line of the parallel fold BL2. Thus, the wave folded sheet S2 is bent in a zigzag shape. Thereafter, bending of the valley fold line proceeds in the wave folding sheet S2 by the rotation of the rotating arm 75A and the pressing by the pressing plate 75D to the wave folding sheet S2 (see FIG. 10B). When the folding at the valley fold line of the wave folding sheet S2 is sufficiently performed (see FIG. 11A), the pressing by the block 72A is performed. Then, after the sandwiching of the corrugated sheet S2 by the press block 72A starts, the pressing plate 75D is separated from the corrugated sheet S2 and the pressing is released (see FIG. 11B). Thereafter, the fold-fold sheet S2 is alternately subjected to the mountain fold and the valley fold in the parallel fold BL2 by pressing by the press block 72A (see FIG. 11C). Thus, the folded body 4 (see FIG. 1) can be obtained.

Thus, according to the present invention, the folded body 4 can be mass-produced efficiently. Further, in the manufacturing process, the flat sheet S1 and the corrugated sheet S2 are less likely to be slipped, wrinkled or torn.

As shown in FIG. 5, in the pressing plate 75D, the pressing side 75H pressed against the corrugated sheet S2 is preferably inclined with respect to the height direction Z. That is, the angle θ2 of the pressing side 75H with respect to the XY plane is preferably an acute angle. As a result, the wave folding sheet S2 can be pressed gradually from below to above, that is, the wave folding sheet S2 can be gradually bent from below to above. In addition, a guide protrusion 75G is preferably provided above the pressing portion 75H. The guide projection 75G makes it difficult for the corrugated sheet S2 to float upward due to the pressing operation by the pressing plate 75D.

In the above embodiment, the folded body 4 is manufactured using the flat sheet S1 (FIG. 3) having the wavy folds BL1 and the parallel folds BL2. However, the present invention is not limited to this and is made from the flat sheet S1 having no wavy folds BL1. May be. In this case, alignment in the feed direction X and press work may be performed with respect to the set position of the wavy fold BL1 instead of the wavy fold BL1.

In the above embodiment, the guide plate 47 continuous in the width direction Y is used, but the present invention is not limited to this. Guide plates 47 arranged at a predetermined pitch in the width direction Y may be used. The guide plate 47 is not limited to a plate-like member, and any guide member can be used as long as it can suppress the bending of the facing sheet in its own direction and can promote the bending to the opposite side with respect to the conveyance path R1. good.

In the above embodiment, the flat sheet S1 is bent using the bending unit 40 including the driving roller 41 and the driven roller 42. However, the present invention is not limited to this, and a predetermined position in the flat sheet S1 is set. The flat sheet S1 may be curved using a clamp member that clamps and an LM guide that can move the clamp member in the feed direction X.

In the above embodiment, the pressing step 14B is performed using the press unit 50 having the press pair 51 that can be freely opened and closed, but the present invention is not limited to this. A vibration process may be performed instead of the pressing process 14B. In the vibration process, as shown in FIG. 12, between the state where the bending at the bending portion W1 is weak (see FIG. 12A) and the state where the bending at the bending portion W1 is strong (see FIG. 12B). The flat sheet S1 is alternately switched. By performing this switching a predetermined number of times, the curved portion W1 can be stiff and bend easily. The curved portion W1 is preferably a wavy crease BL1, and particularly preferably a position where the wavy crease BL1 is provided (FIG. 3B).

In the above embodiment, the bending unit 60 including the main support bar 61, the sub support tool 63, and the sub drive unit 64 is used. However, the present invention is not limited to this, and the sub support tool 63, the sub side, The drive unit 64 may be omitted. In this case, with respect to an arbitrary main support bar 61, the main support bar 61 located next to the main support bar 61 also functions as a secondary support tool 63 (FIG. 13).

By the way, the corrugated sheet S 2 formed by alternately performing the mountain fold and the valley fold at the corrugated fold BL 1 is temporarily accommodated by the temporary accommodation unit 44. However, in the temporary storage unit 44, the folded state BL1 on the upstream side of the corrugated sheet S2 cannot be maintained and may be opened (see FIG. 14A). In the folded sheet S2 in this state, the conveyance by the bending unit 60 becomes difficult. Therefore, in order to create a state where the upstream wavy fold BL1 is folded (see FIG. 14C), the temporary storage unit 44 includes a downstream end protruding portion 44T protruding from the downstream end portion of the mounting surface 44S, and a downstream end. It is preferable to include a recess 44K formed on the placement surface 44S upstream of the end projecting portion 44T, an arm 44A disposed in the recess 44K, and a rotation shaft 44X of the arm 44A. The rotation angle θA of the arm 44A may be less than 90 °, or 90 ° or more (for example, 120 °). The control unit 90 is driven between the accommodation state (FIGS. 14A and 14C) accommodated in the recess 44K and the projection state protruding from the recess 44K (FIG. 14B) by driving the rotation shaft 44X. The arm 44A can be switched between. When the arm 44A is switched from the housed state to the projecting state, the corrugated sheet S2 tends to move downstream while the upstream corrugated fold BL1 is in the valley folded state. As a result of the movement of the downstream side of the wave folding sheet S2 being restricted by the downstream end protruding portion 44T, the wave folding sheet S2 is sandwiched between the downstream end protruding portion 44T and the arm 44A in the accommodated state. In this way, it is possible to create a valley folded state of the upstream wavy fold BL1. The protruding state of the arm 44 A may be maintained until conveyance by the bending unit 60 is performed. Of course, if the arm 44 is once in the protruding state (FIG. 14B) and the upstream wavy crease BL1 can be maintained in the folded state (FIG. 14C), the conveyance by the bending unit 60 is performed. Prior to being performed, the arm 44A may be returned from the protruding state to the stowed state.

The present invention is a pre-folding device for pre-folding the sheet at a parallel fold that intersects the mountain fold or the valley fold with respect to a sheet in which mountain folds and valley folds are alternately arranged. And a second support member that supports the sheet from a second side opposite to the first side from a first side with respect to the first side. And a support member moving unit that performs relative movement between the first support member and the second support member, and the second support member is on the left side of the first support member in the seat. And a right support member that supports the right side of the seat from the first support member, and the support member moving unit is supported by the left support member and the right support member. To said sheet, characterized in that pressing the said first support member. In addition, it is preferable that the first support member is pressed against the sheet first at an intersection with the mountain fold or the valley fold among the setting positions of the parallel fold. Furthermore, it is preferable that the first support member is inclined with respect to the placement surface on which the sheet is placed.

It should be noted that the present invention is not limited to the above-described embodiment, and it is needless to say that various modifications can be made without departing from the gist of the present invention.

2 Folding structure 4 Folding body 10 Folding body manufacturing method 12 Sending process 14 Wave folding process 14A Bending process 14B Pressing process 16 Parallel folding process

16A Bending process

16B Folding process 20 Folding structure manufacturing equipment 30 Sending unit 31 Case 32 Suction cup 35 Transport Roller 40 Bending unit 41 Drive roller 42 Driven roller 44 Temporary storage unit 47 Guide plate 47T Projecting ridge line 50 Press unit 51 Press pair 51F Press surface 60 Bending unit 61 Main support rod 62 Main drive unit 63 Sub support 64 Sub drive unit 70 folding unit 71 mounting stage 72 sandwiching structure 80 storage unit 81 opening / closing door 82 storage space 90 control unit

Claims

Of the sheets, a first sheet portion, a second sheet portion separated from the first sheet portion in the sheet conveying direction, an intermediate sheet portion between the first sheet portion and the second sheet portion, and a wavy shape A sheet folding device that folds the intermediate sheet portion at the wavy fold when each fold is defined as including both a fold position before the fold is provided on the sheet and a fold line provided on the sheet Because
The wavy fold line is formed by connecting a plurality of line segments in a zigzag shape, extends so as to intersect the transport direction, and is arranged at a predetermined interval in the transport direction,
A one-side bending unit that curves the wavy fold of the intermediate sheet portion to one side;
A folding unit that folds at the curved wavy fold,
The one-side bending unit is
An upstream roller pair capable of gripping and feeding the first sheet portion;
A downstream roller pair capable of gripping and feeding the second sheet portion;
A guide member disposed on the other side with respect to the conveyance path and between the upstream roller pair and the downstream roller pair;
A control device for controlling each unit,
The control device is capable of individually rotating the upstream drive roller forming the upstream roller pair and the downstream drive roller forming the downstream roller pair in forward and reverse directions,
The guide member includes a ridge line protruding toward the conveyance path,
The control device feeds the first sheet portion to the downstream side in the conveyance direction by the upstream roller pair and the first roller pair by the downstream roller pair so that the intermediate sheet portion including the wavy fold is curved. And feeding the two sheet part to the upstream side in the conveying direction,
The sheet folding device according to claim 1, wherein the ridge line restricts the bending of the intermediate sheet portion toward the other side and promotes the bending of the intermediate sheet portion toward the one side.
Of the sheets, a first sheet portion, a second sheet portion separated from the first sheet portion in the sheet conveying direction, an intermediate sheet portion between the first sheet portion and the second sheet portion, and a wavy shape A sheet folding device that folds the intermediate sheet portion at the wavy fold when each fold is defined as including both a fold position before the fold is provided on the sheet and a fold line provided on the sheet Because
The wavy fold line is formed by connecting a plurality of line segments in a zigzag shape, extends so as to intersect the transport direction, and is arranged at a predetermined interval in the transport direction,
A one-side bending unit that curves the wavy fold of the intermediate sheet portion to one side;
A folding unit that folds at the curved wavy fold,
The one-side bending unit is
An upstream clamp member capable of gripping the first sheet portion;
A downstream clamp member capable of gripping the second sheet portion;
A guide member disposed on the other side with respect to the transport path and between the upstream clamp member and the downstream clamp member;
A control device for controlling each unit,
The guide member includes a ridge line protruding toward the conveyance path,
The control device includes the upstream clamp member and the downstream side so that a relative distance between the upstream clamp member and the downstream clamp member is reduced so that the intermediate sheet portion including the wavy fold is curved. Move at least one of the clamp members,
The sheet folding device according to claim 1, wherein the ridge line restricts the bending of the intermediate sheet portion toward the other side and promotes the bending of the intermediate sheet portion toward the one side.
The folding unit includes a press unit that performs press processing on the curved wavy crease,
The press unit is
A first press pair disposed on both sides so as to sandwich the first line segment forming the wavy fold;
A second press pair disposed on both sides so as to sandwich the second line segment forming the wavy fold,
The second press pair is arranged next to the first press pair with respect to the longitudinal direction of the wavy fold,
3. The sheet folding apparatus according to claim 1, wherein the first press pair and the second press pair are arranged apart from each other so as to escape the bent portion of the wavy fold.
Of the sheets, a first sheet portion, a second sheet portion separated from the first sheet portion in the sheet conveying direction, an intermediate sheet portion between the first sheet portion and the second sheet portion, and a wavy shape A sheet folding device that folds the intermediate sheet portion at the wavy fold when each fold is defined as including both a fold position before the fold is provided on the sheet and a fold line provided on the sheet Because
The wavy fold line is formed by connecting a plurality of line segments in a zigzag shape, extends so as to intersect the transport direction, and is arranged at a predetermined interval in the transport direction,
A one-side bending unit that curves the wavy fold of the intermediate sheet portion to one side;
A folding unit that folds at the curved wavy fold,
The folding unit includes a press unit that performs press processing on the curved wavy crease,
The press unit is
A first press pair disposed on both sides so as to sandwich the first line segment forming the wavy fold;
A second press pair disposed on both sides so as to sandwich the second line segment forming the wavy fold,
The second press pair is arranged next to the first press pair with respect to the longitudinal direction of the wavy fold,
The sheet folding apparatus, wherein the first press pair and the second press pair are arranged apart from each other so as to escape the bent portion of the wavy fold.
When the parallel crease is defined as including both the crease position before the crease is provided on the sheet and the fold line provided on the sheet,
The parallel folds are arranged in parallel at predetermined intervals in the longitudinal direction of the wavy folds and pass through the bent portions of the wavy folds,
The clamping member is
A main support member that touches the valley fold line of the parallel fold;
A secondary support member disposed on both sides of the main support member in the longitudinal direction of the wavy fold and touching the sheet from the opposite side of the main support member,
5. The sheet folding apparatus according to claim 3, wherein the main support member and the secondary support member are relatively movable so as to sandwich the valley fold line portion of the sheet.
Of the sheets, a first sheet portion, a second sheet portion separated from the first sheet portion in the sheet conveying direction, an intermediate sheet portion between the first sheet portion and the second sheet portion, and a wavy shape The fold line is a sheet folding device that folds the intermediate sheet portion at the wavy fold line when defined as a fold line provided on the sheet,
The wavy fold line is formed by connecting a plurality of line segments in a zigzag shape, extends so as to intersect the transport direction, and is arranged at a predetermined interval in the transport direction,
A one-side bending unit that curves the wavy fold of the intermediate sheet portion to one side;
A folding unit that folds at the curved wavy fold,
The one-side bending unit is
An upstream roller pair capable of gripping and feeding the first sheet portion;
A downstream roller pair capable of gripping and feeding the second sheet portion;
A guide member disposed on the other side with respect to the conveyance path and between the upstream roller pair and the downstream roller pair;
A control device for controlling each unit,
The control device is capable of individually rotating the upstream drive roller forming the upstream roller pair and the downstream drive roller forming the downstream roller pair in forward and reverse directions,
The guide member includes a ridge line protruding toward the conveyance path,
The control device feeds the first sheet portion to the downstream side in the conveyance direction by the upstream roller pair and the first roller pair by the downstream roller pair so that the intermediate sheet portion including the wavy fold is curved. And feeding the two sheet part to the upstream side in the conveying direction,
The ridge line regulates the bending of the intermediate sheet portion to the other side and promotes the bending of the intermediate sheet portion to the one side,
The folding unit includes a first curved state in which the wavy fold is curved and a wavy fold in the first curved state through control of the upstream roller pair and the downstream roller pair by the control device. A sheet folding apparatus, wherein the sheet folding apparatus is alternately switched between a second curved state that is also greatly curved.
Of the sheets, a first sheet portion, a second sheet portion separated from the first sheet portion in the sheet conveying direction, an intermediate sheet portion between the first sheet portion and the second sheet portion, and a wavy shape The fold line is a sheet folding device that folds the intermediate sheet portion at the wavy fold line when defined as a fold line provided on the sheet,
The wavy fold line is formed by connecting a plurality of line segments in a zigzag shape, extends so as to intersect the transport direction, and is arranged at a predetermined interval in the transport direction,
A one-side bending unit that curves the wavy fold of the intermediate sheet portion to one side;
A folding unit that folds at the curved wavy fold,
The one-side bending unit is
An upstream clamp member capable of gripping the first sheet portion;
A downstream clamp member capable of gripping the second sheet portion;
A guide member disposed on the other side with respect to the transport path and between the upstream clamp member and the downstream clamp member;
A control device for controlling each unit,
The guide member includes a ridge line protruding toward the conveyance path,
The control device includes the upstream clamp member and the downstream side so that a relative distance between the upstream clamp member and the downstream clamp member is reduced so that the intermediate sheet portion including the wavy fold is curved. Move at least one of the clamp members,
The ridge line regulates the bending of the intermediate sheet portion to the other side and promotes the bending of the intermediate sheet portion to the one side,
The folding unit includes a first curved state in which the wavy fold is curved and the wavy fold in the first curved state through control of the upstream clamp member and the downstream clamp member by the control device. A sheet folding apparatus, wherein the sheet folding apparatus is alternately switched between a second curved state that is also greatly curved.
Of the sheets, a first sheet portion, a second sheet portion separated from the first sheet portion in the sheet conveying direction, a first intermediate sheet portion between the first sheet portion and the second sheet portion, The wavy fold is a fold formed by folding the sheet at the wavy fold when defined as including both a fold position before the fold is provided on the sheet and a fold line provided on the sheet. A method for manufacturing a body,
The wavy fold line is formed by connecting a plurality of line segments in a zigzag shape, extends so as to intersect the transport direction, and is arranged at a predetermined interval in the transport direction,
A one-side bending step for bending the first intermediate sheet portion to one side;
A one-side folding step of folding at the wavy crease curved to the one side,
In the one-side curving step, the first intermediate sheet portion faces the other side guide member arranged on the other side with respect to the sheet conveyance path, and the second sheet portion is conveyed upstream. And conveying the first sheet portion to the downstream side,
The other side guide member includes the other side ridge line protruding toward the conveyance path,
The other side ridge line restricts the bending of the intermediate sheet portion to the other side and promotes the bending of the intermediate sheet portion to the one side,
In the one-side folding step, pressing is performed on the wavy fold of the first intermediate sheet portion curved to one side using a press unit arranged on one side with respect to the sheet conveyance path. The manufacturing method of the folding body characterized by this.
Among the sheets, when defining the third sheet portion away from the second sheet portion in the transport direction, and the second intermediate sheet portion between the second sheet portion and the third sheet portion, respectively,
The other side bending step of bending the second intermediate sheet portion to the other side;
The other side folding step of folding at the wavy crease curved to the other side,
In the other side bending step, the second intermediate sheet portion faces the one side guide member arranged on one side with respect to the sheet conveyance path, and the upstream side of the third sheet portion is conveyed. And conveying the second sheet portion to the downstream side,
The one-side guide member includes a one-side ridge line protruding toward the conveyance path,
The one side ridge line regulates the bending of the intermediate sheet portion to the one side and promotes the bending of the intermediate sheet portion to the other side,
In the other side folding step, pressing is performed on the wavy crease of the second intermediate sheet portion curved to the other side using a press unit arranged on the other side with respect to the sheet conveyance path. The manufacturing method of the folding body of Claim 8 characterized by these.
The conveyance of each sheet portion performed for bending each intermediate sheet portion is performed by rotation of a roller that grips the sheet portion or movement of a clamp member that grips the sheet portion. The manufacturing method of the folding body of 8 or 9.
The method for manufacturing a folded body according to any one of claims 8 to 10, wherein the press unit is provided with a linear press mark so as to escape from a bent portion of the wavy fold.
Of the sheets, a first sheet portion, a second sheet portion separated from the first sheet portion in the sheet conveying direction, a first intermediate sheet portion between the first sheet portion and the second sheet portion, The wavy crease is a method of manufacturing a folded body formed by folding the sheet with the wavy crease when defined as a fold line provided on the sheet, respectively.
The wavy fold line is formed by connecting a plurality of line segments in a zigzag shape, extends so as to intersect the transport direction, and is arranged at a predetermined interval in the transport direction,
A one-side bending step for bending the first intermediate sheet portion to one side;
A one-side folding step of folding at the wavy crease curved to the one side,
In the one-side curving step, the first intermediate sheet portion faces the other side guide member arranged on the other side with respect to the sheet conveyance path, and the second sheet portion is conveyed upstream. And conveying the first sheet portion to the downstream side,
The other side guide member includes the other side ridge line protruding toward the conveyance path,
The other side ridge line restricts the bending of the intermediate sheet portion to the other side and promotes the bending of the intermediate sheet portion to the one side,
In the one-side folding step, a first curved state in which the wavy fold of the first intermediate sheet portion is curved, and a second curved state in which the wavy fold is curved larger than the first curved state. A method for manufacturing a folded body, characterized in that the switching is performed alternately between the two.
Among the sheets, when defining the third sheet portion away from the second sheet portion in the transport direction, and the second intermediate sheet portion between the second sheet portion and the third sheet portion, respectively,
The other side bending step of bending the second intermediate sheet portion to the other side;
The other side folding step of folding at the wavy crease curved to the other side,
In the other side bending step, the second intermediate sheet portion faces the one side guide member arranged on one side with respect to the sheet conveyance path, and the upstream side of the third sheet portion is conveyed. And conveying the second sheet portion to the downstream side,
The one-side guide member includes a one-side ridge line protruding toward the conveyance path,
The one side ridge line regulates the bending of the intermediate sheet portion to the one side and promotes the bending of the intermediate sheet portion to the other side,
In the other side folding step, a first curved state in which the wavy crease of the second intermediate sheet portion is curved, and a second curved state in which the wavy fold is curved more greatly than the first curved state. The method for producing a folded body according to claim 12, wherein the switching is performed alternately.
When a parallel crease is defined as including both a crease position before the crease is provided on the sheet and a crease line provided on the sheet, the parallel crease is a predetermined interval in the longitudinal direction of the wavy crease. In parallel and passing through the bent portion of the wavy fold,
With respect to the sheet in which mountain folds and valley folds are alternately performed in the wave-like folds in the longitudinal direction of the parallel folds, the first from the first side with respect to the valley fold lines of the first parallel folds. The pressing member is pressed, and the second pressing member is pressed against the valley fold line from the second side opposite to the first side with respect to the parallel fold adjacent to the first parallel fold. The pushing step;
The zigzag sheet that is pressed against the first pressing member and the second pressing member, using the pressing members disposed on both sides of the sheet in the longitudinal direction of the wavy fold. A pinching step to sandwich the sheet;
The folding body according to claim 9 or 13, further comprising: a folding step that is performed after the pinching step and folds the sheet using the pressing member together with releasing the pressing by the pressing member. Production method.
A method for producing a folded body obtained by folding a sheet with a wavy fold and a parallel fold,
When the wavy crease and the parallel crease are defined as including both the crease position before the crease is provided on the sheet and the fold line provided on the sheet,
The wavy fold line is formed by connecting a plurality of line segments in a zigzag shape, and extends in a predetermined direction and is arranged at intervals in a direction intersecting the predetermined direction.
The parallel folds are arranged in parallel at predetermined intervals in the longitudinal direction of the wavy folds and pass through the bent portions of the wavy folds,
With respect to the sheet in which mountain folds and valley folds are alternately performed in the wave-like folds in the longitudinal direction of the parallel folds, the first from the first side with respect to the valley fold lines of the first parallel folds. The pressing member is pressed, and the second pressing member is pressed against the valley fold line from the second side opposite to the first side with respect to the parallel fold adjacent to the first parallel fold. The pushing step;
The zigzag sheet that is pressed against the first pressing member and the second pressing member, using the pressing members disposed on both sides of the sheet in the longitudinal direction of the wavy fold. A pinching step to sandwich the sheet;
A method of manufacturing a folded body, comprising: a folding step that is performed after the sandwiching step, and is configured to fold the sheet using the pressing member together with releasing the pressing by the pressing member.
The method for manufacturing a folded body according to claim 14 or 15, wherein, in the pressing step, the pressing member presses the valley fold line from the bottom to the top.
When the parallel crease is defined as including both the crease position before the crease is provided on the sheet and the fold line provided on the sheet,
The wavy crease is a line in which a plurality of line segments are connected in a zigzag shape, and extends in a predetermined direction and is arranged at intervals in a direction intersecting the predetermined direction.
The parallel folds are arranged in parallel at predetermined intervals in the longitudinal direction of the wavy folds and pass through the bent portions of the wavy folds,
In the longitudinal direction of the parallel fold, a mountain fold and a valley fold are pressed against the valley fold line of the first parallel fold from the first side against the sheet on which the wave fold is alternately performed. A first pressing member;
A second pressing member that presses against a valley fold line from a second side opposite to the first side against a parallel crease adjacent to the first parallel fold;
A pressing member moving unit that performs relative movement between the first pressing member and the second pressing member;
A folding unit that folds the sheet in a folded state by pressing the first pressing member and the second pressing member;
The pressing member moving unit is capable of switching the first pressing member between a first state located between the plurality of second pressing members and a second state retracted from the first state. A sheet folding apparatus.
The first pressing member and the second pressing member are formed in a plate shape,
The first pressing member supports the pressing line on the valley fold side located in the center of the sheet,
The pressing member moving unit is configured to individually move the first pressing member and the second pressing member with respect to the thickness direction of the plate and the surface direction of the plate,
18. The first pressing member and the second pressing member approach in the thickness direction and approach in the plate surface direction due to relative movement by the pressing member moving unit. Sheet folding device.
The folding unit is
A pair of press blocks having a pressing surface for pressing the sheet;
A press block moving mechanism that performs relative movement of the pair of press blocks, and
The plurality of second pressing members are arranged between the pair of press blocks,
The said press block moving mechanism makes the said press block approach from the both sides of the said 1st pressing member, when the said 1st pressing member will be in the said 1st state, The said press block is characterized by the above-mentioned. Sheet folding device.
The first pressing member and the second pressing member have contact sides that touch the sheet,
20. The sheet folding apparatus according to claim 17, wherein the contact side is inclined with respect to the placement surface on which the sheet is placed.