JP2018177528A - Sheet folding device and foldable body manufacturing method - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a sheet folding device capable of efficient mass production of a foldable body and to provide a foldable body manufacturing method.SOLUTION: A foldable body manufacturing method 10 comprises: a discharging process 12 to discharge a flat sheet S1; a corrugated folding process 14 to fold the flat sheet S1 with corrugated creases BL1; and a parallel folding process 16 to fold the corrugated sheet S2 obtained through the corrugated folding process 14 with parallel creases BL2. The corrugated folding process 14 is made up of: a warping step 14A to warp the flat sheet S1 at predetermined locations; and a pressing step 14B to press warped portions of the flat sheet S1. The parallel folding process 16 is made up of: a bending step 16A to bend the corrugated sheet S2 at a set position of the parallel creases BL2; and a folding step 16B to fold the bent corrugated sheet S2.SELECTED DRAWING: Figure 2

Description

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

  Nowadays, a very large number of documents are almost one size A4. However, due to the need to describe various information, there is an increasing demand for larger-sized documents such as maps, plans, and manuals. Large-size products often need folding after output for their carrying and storage. Thus, there is an increasing demand for instruments for compacting documents.

  Among various folding structures, a folding structure called Miura fold (registered trademark) has unique properties such as expansion / retention, strength, memory of folds, etc., as compared with a normal bellows fold structure (patented) References 1-2).

JP 2008-284860 A JP, 2009-51620, A

  In order to make a folded structure called Miura fold (registered trademark), it is necessary to fold the original sheet with a wavy fold. However, even if a folding process is performed using a machine, automation is difficult because of problems such as the case where the sheet is detached from the ideal folding structure or tearing of the sheet. For this reason, the said folding structure can not be efficiently mass-produced, but there existed a limit in spreading the Miura fold with the outstanding characteristic to a market.

  In view of such circumstances, the present invention is intended to provide a sheet folding apparatus and a method of manufacturing a folding body capable of efficiently mass-producing the folding body.

  In the sheet folding apparatus of the present invention, when the parallel fold is defined as including both the fold position before the fold is provided to the sheet and the fold line provided to the sheet, the wavy fold is a plurality of line segments Extend in a predetermined direction and are arranged at intervals in a direction crossing the predetermined direction, and the parallel folds are arranged in parallel at a predetermined interval in the longitudinal direction of the wavy folds. The corrugated sheet passes through the bent portion of the wavy fold, and the first fold is formed from the first side with respect to the sheet in which the mountain fold and the valley fold are alternately performed in the longitudinal direction of the parallel fold. A first pressing member pressing against the valley fold line of the parallel fold, and a valley fold from the second side opposite to the first side with respect to the parallel fold next to the first parallel fold Pair to line And a pressing member moving unit for performing relative movement between the first pressing member and the second pressing member, the first pressing member, and the second pressing member And a folding unit that folds the sheet in a folded state by the pressing with the pressing unit, and the pressing unit moving unit is configured to position the first pressing unit between the plurality of second pressing units. It is characterized in that switching is possible between the first state and the second state retracted from the first state.

The present invention is a manufacturing method of a folded body formed by folding a sheet with a corrugated fold and a parallel fold, wherein the corrugated fold and the parallel fold are provided at a fold position before the fold is provided to the sheet and the sheet. The wave-like folds, when defined as including both with a folding line, are a series of zigzag line segments extending in a predetermined direction and being spaced apart in a direction intersecting the predetermined direction And the parallel folds are arranged parallel to each other at predetermined intervals in the longitudinal direction of the wavy folds and pass through the bends of the wavy folds, and the mountain folds and valley folds are made in the longitudinal direction of the parallel folds. The first pressing member is pressed against the valley fold line of the first parallel fold from the first side with respect to the sheet, which is alternately performed by the wavy folds And a pressing step of pressing the second pressing member 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 sheet according to the present invention is a zigzag-shaped sheet as it is pressed by the first pressing member and the second pressing member, and the pressing member is disposed on both sides of the sheet in the longitudinal direction of the wavy fold. And a folding step, which is performed after the pinching step, and which is used to release the pressing by the pressing member and fold the sheet by using the pressing member.

  The present invention is a manufacturing method of a folded body formed by folding a sheet with a corrugated fold and a parallel fold, and when the corrugated fold and the parallel fold are defined as fold lines provided in the sheet, the corrugated fold is A plurality of line segments extending in a zigzag direction and extending in a predetermined direction and being spaced apart in a direction intersecting the predetermined direction; and the parallel folds have a predetermined spacing in the longitudinal direction of the wavy folds Parallel to each other and passing through the bent portion of the wave-like fold, and the first fold of the fold-like crease and the valley-fold are alternately performed in the longitudinal direction of the parallel crease; Pressing the first pressing member against the valley fold line of the first parallel fold from the side of the first side and the first side with respect to the parallel fold next to the first parallel fold Pressing the second pressing member against the valley folding line from the second side opposite to the other, and the zigzag shape which remains pressed by the first pressing member and the second pressing member A sheet holding step of holding the sheet by using pressing members disposed on both sides of the sheet in the longitudinal direction of the wavy fold, and pressing after the holding step by the pressing member Forming the sheet in which the fold fold and the valley fold are alternately performed in the longitudinal direction of the parallel fold, and the folding step of folding the sheet by using the press member together with the release of Among the sheets, a first sheet part, a second sheet part separated from the first sheet part in the sheet conveying direction, and the first sheet part provided with an intermediate folding step When the first intermediate sheet portion between the second sheet portion and the first intermediate sheet portion are respectively defined, the intermediate folding step includes a one side bending step of bending the first intermediate sheet portion to one side, and a bending to the one side And the first intermediate sheet portion is opposed to the other side guide member disposed on the other side with respect to the conveyance path of the sheet in the one side bending step. Transports the second sheet portion to the upstream side and transports the first sheet portion to the downstream side, and the other side guide member includes the other side ridge line protruding toward the transport path The other side 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, and in the one side folding step, the sheet Transport It is characterized by performing press processing with respect to the said wavelike crease of said 1st intermediate-sheet part curved to one side using the press unit distribute | arranged to one side on the basis of a feed route.

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

(A) is a top view which shows the outline | summary of 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 top view which shows the outline | summary of a flat sheet, (B) is IIIa-IIIa 'sectional drawing which shows the outline of a flat sheet. It is a perspective view which shows the outline | summary of a corrugated sheet. 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 mark was formed of the press process. (A)-(I) are side views which show a bending unit and a press unit. (A)-(D) are side views which show a bending unit. (A)-(B) is a side view which shows a folding unit. (A)-(B) is a side view which shows a folding unit. It is an explanatory view showing an outline of a curving process. (A)-(D) are side views which show another embodiment of a bending unit. (A)-(C) is a sectional view showing another embodiment of a temporary accommodation unit.

  As shown in FIG. 1A, the folding structure 2 called Miura fold (registered trademark) includes a sheet S, a wavy fold BL1 formed on the sheet S, and a parallel fold BL2 formed on the sheet S. Equipped with The wavy folds BL1 extend in the longitudinal direction, and the parallel folds BL2 extend in the lateral direction. The wavy folds BL1 and the parallel folds BL2 cross each other. When the sheet S is alternately mountain-folded and valley-folded at the wavy fold BL1, and then mountain-folded and valley-folded alternately at the parallel fold BL2, the sheet can be folded in a compact manner (see FIG. 1B). The folded body 4 shown in FIG. 1B is obtained by folding the folding structure 2 at the wavy fold line BL1 or the parallel fold line BL2. Such a foldable body 4 has excellent folding and storage properties, strength, memory of folds and the like because it has a special folding structure 2 such as Miura fold (registered trademark).

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

  The flat sheet S1 may be any of paper, plastic and metal.

  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. The corrugated sheet S2 (refer to FIG. 4) can be obtained from the flat sheet S1 (refer to FIG. 3) by the corrugated step 14. The flat sheet S1 shown in FIG. 3 has a flat sheet body S11, a plurality of wavy folds BL1 formed on 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 main body S11. The wavy folds BL1 here are zigzag-shaped, but the bending angle and the distance between the bending positions are predetermined. The wavy folds BL1 and the parallel folds BL2 can be formed on the flat sheet S1 by predetermined pressing.

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

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

  As shown in FIG. 5, the manufacturing facility 20 of the folding structure includes a delivery unit 30 in which the delivery step 12 is performed, a bending unit 40 in which the bending step 14A is performed, a press unit 50 in which the pressing step 14B is performed, and a bending step. 16A is performed, a folding unit 70 in which the folding step 16B is performed, an accommodation unit 80 for accommodating the folding structure 2 obtained by the folding unit 70, and individual control of each component of each unit 30 to 80 And a control unit 90.

  The delivery unit 30 includes a case 31 in which the flat sheet S1 is stored in a stacked state, a suction cup 32 movable in three directions of the feeding direction X, width direction Y and height direction Z, and exhaust port 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 accommodation unit 44 for temporarily accommodating the corrugated sheet S2. Prepare. The control unit 90 controls the drive roller 41 via control of the motor. The drive rollers 41 are arranged at a predetermined pitch in the feed direction X. The driven roller 42 is disposed to face the driving roller 41. The paired drive roller 41 and driven roller 42 can convey the flat sheet S1 in a predetermined direction while gripping the flat sheet S1. In the manufacturing equipment 20 of the folding structure shown in the figure, three roller pairs consisting of the driving roller 41 and the driven roller 42 are arranged at a predetermined pitch. Thus, the conveyance path R1 of the flat sheet S1 is formed in the bending unit 40 by the two roller pairs. The transport path R1 extends to the temporary storage unit 44.

  Here, when it is desired to feed the flat sheet S1 in the feed direction X, the three drive rollers 41 may be rotated (normally rotated) in the same direction (see FIGS. 8A and 8I). Here, when the rotation direction of the drive roller 41 on the most downstream side among the three drive rollers 41 is reversely rotated (reversed), the flat sheet S1 is formed by the middle drive roller 41 and the drive roller 41 on the most downstream side. In the space CL2 with the lower side (see FIG. 6 and FIG. 8 (B)). On the other hand, when it is desired to feed the flat sheet S1 to the opposite side in the feed direction X (if it is desired to return it), the three drive 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 forward, the flat sheet S1 is in the clearance CL1 between the drive roller 41 on the most upstream side and the drive roller 41 in the middle. , Curving upward (see FIG. 8 (F)).

  As shown in FIGS. 5 to 7, the press unit 50 is disposed between the roller pair consisting of the drive roller 41 and the driven roller 42 in the feed direction X. When three roller pairs are provided, the press unit 50 is disposed at a position higher than the conveyance path R1 in the clearance CL1 on the upstream side, and at a position lower than the conveyance path R1 in the clearance CL2 on the downstream side. A press unit 50 is arranged. In this way, a gap K1 is formed so that the flat sheet S1 can be bent from each roller pair to the press unit 50 (see FIG. 6). The press unit 50 may be disposed in the gap CL1 at a position lower than the transport path R1, and the press unit 50 may be disposed in the gap CL2 at a position higher than the transport path R1.

  The press unit 50 has a press pair 51 which can be opened and closed. As shown in FIGS. 6 to 7, the press pair 51 includes a pair of press tools aligned in the feed direction X, and is aligned at a predetermined pitch in the width direction Y of the transport path R1. The pitch is preferably set so that the press surface 51F of the press pair 51 escapes from the bent portion T1 (see FIG. 1) of the wavy fold line BL1. The press surface 51F preferably corresponds to the central portion of the line segment L1 (see FIG. 1) of the wavy fold line BL1. Therefore, the press marks PK1 forming the wavy folds BL1 are arranged at a predetermined pitch in the width direction Y as shown in FIG. 7C.

  Further, the press surface 51F is oblique to the width direction Y. Furthermore, regarding the press pairs 51 adjacent in the width direction Y, the respective press surfaces 51F are directed in the alternate direction. Thereby, the wavy fold BL1 can be formed using the press pair 51. In addition, since the press surface 51F of the press pair 51 escapes from the bent portion T1 (see FIG. 1) of the wavy fold line BL1, it is possible to prevent the flat sheet S1 from being scratched, wrinkled or broken during operation of the press pair 51. Therefore, it is preferable that the number of installed press pairs 51 in the width direction Y be prepared as many as the number of line segments L1 (see FIG. 1) forming the wavy fold BL1.

  The bending unit 40 preferably further includes a restriction plate 47. The regulating plate 47 regulates the direction in which the flat sheet S1 curves, and is disposed in each of the gap CL1 and the gap CL2. The restricting plate 47 is formed in a plate shape and extends in the width direction Y. The restricting plate 47 preferably has a protruding ridge line 47T at a midway portion in the feed direction X. The protruding ridge line 47T protrudes toward the transport path R1 and extends in the width direction Y.

  The restriction plate 47 disposed in the clearance CL1 is disposed to face the press unit 50 via the conveyance path R1. Similarly, the regulating plate 47 disposed in the gap CL2 is disposed to face the press unit 50 via the conveyance path R1. The restricting plate 47 suppresses the flat sheet S1 from bending toward the restricting plate 47 with reference to the conveyance path R1. According to the restriction plate 47, when the flat sheet S1 is to be curved, the bending toward the press unit 50 can be promoted.

  As shown in FIGS. 5 and 9, the bending unit 60 transports the corrugated sheet S2 to the folding unit 70 and performs the bending step 16A, and the main support rod touches one surface of the corrugated sheet S2. 61, a main side drive unit 62 for driving the main support rod 61, a follower support 63 for touching the other surface of the corrugated sheet S2, and a follower side drive unit 64 for driving the follower support 63.

  The main support rod 61 touches the valley fold line of the parallel fold BL2. The secondary support 63 includes a left support rod and a right support rod. The left support rod is disposed so as to escape to the left side in the width direction Y as viewed from the valley fold line. The right side support rod is disposed to escape to the right side in the width direction Y as viewed from the valley fold line. The main support rod 61 is movable between the left support rod and the right support rod of the secondary support 63 by the main drive unit 62 and the secondary drive unit 64. The main support bar 61, the left support bar and the right support bar are all formed in a cylindrical shape. The shapes of the main support bar 61, the left side support bar and the right side support bar may not be cylindrical, but the portion in contact with the corrugated sheet S2 is preferably a convex curved surface. It is preferable that a pair of the main support rod 61 and the secondary support 63 be provided for each valley fold line of the parallel fold BL2.

  The main drive unit 62 allows the main support rod 61 to move in three axial directions (for example, the feed direction X, the width direction Y, and the height direction Z). Similarly, the secondary drive unit 64 makes the secondary support 63 movable in three axial directions (for example, the feed direction X, the width direction Y, and the height direction Z). With the main drive unit 62 and the secondary drive unit 64, the pair of the main support rod 61 and the secondary support 63 sandwiches the corrugated sheet S2 (see FIGS. 9A to 9C) and sandwiches it. A conveying state in which the sheet is conveyed to the mounting stage 71 (see FIG. 5) of the folding unit 70 while maintaining it, and a bending state in which the sheet is bent at the valley folding line of the parallel fold BL2 in the mounting stage 71 (FIG. 9D) It can be switched between the reference) and the retracted state separated from the corrugated sheet S2.

  It is preferable that a portion of the main support rod 61 in contact with the corrugated sheet S2 crosses a portion of the secondary support 63 in contact with the corrugated sheet S2. In particular, the distance CLx between the main support bar 61 and the secondary support 63 as it goes from the side (that is, the lower side) closer to the mounting stage 71 of the folding unit 70 (ie, the upper side). Is preferably large. As a result, when the corrugated sheet S2 is folded using the main support rod 61 and the sub-supporting tool 63, the tension due to the folding can be released upward. As a result, the wrinkles and tears of the corrugated sheet S2 are suppressed. , The folding process 16B can be performed smoothly. In FIG. 5, the portion of the main support rod 61 in contact with the corrugated sheet S2 is oblique to the height direction Z, and the portion of the sub support 63 in contact with the corrugated sheet S2 is in the height direction. It is parallel to Z. The portion of the sub-supporting tool 63 which touches the corrugated sheet S2 may be oblique to the height direction Z.

  As shown in FIGS. 5 and 10, in the folding unit 70, both of the work area for the placement stage 71 having the work area for placing the wave-folded sheet S2 and the wave-folded sheet S2 placed for the work A press block 72 for sandwiching from the outside, and a bending structure 75 for bending the corrugated sheet S2 placed in the operation.

  The press blocks 72 are arranged in pairs on the mounting stage 71. The control unit 90 allows the pair of press blocks 72 to move to predetermined positions in the width direction Y, respectively.

  The bending structure 75 is disposed at the upper portion of the press block 72 and extends in the XY plane, a pivoting arm 75A, a support rod 75B extending downward from the tip of the pivoting arm 75A, and a pressing plate disposed in the X direction. And 75D. The pivoting 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 pivots about the pivot axis AX1, and the pressing plate 75D is movable to a predetermined position in the feed direction X and the width direction Y.

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

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

(Delivery process)
As shown in FIG. 5, the delivery unit 30 places the suction cups 32 on the uppermost flat sheet S1 of the stacked flat sheets S1. In this state, when the exhaust pump is driven, the suction cup 32 sucks the flat sheet S1 at the uppermost position and conveys it to the conveying roller 35. Thereafter, by setting the air pressure of the suction cup 32 to atmospheric pressure, the suction by the suction cup 32 is released, and the flat sheet S1 is placed on the conveyance roller 35. The transport roller 35 feeds the flat sheet S1 to the bending unit 40.

(Bending process and pressing process)
In the bending unit 40, when the three drive rollers 41 are rotated in the same direction (forward rotation), the flat sheet S1 is fed in the feed direction X (see FIG. 8A). When the valley folding position of the wavy fold BL1 is positioned in the gap CL2, the two upstream drive rollers 41 are rotated forward and the downstreammost drive roller 41 is reversed (see FIG. 8B). As a result, the portion of the flat sheet S1 located in the gap CL2 is curved downward by the restriction plate 47 than the conveyance path R1. 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 line BL1. Thereafter, when the press pair 51 is opened and the rotation 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. See E).

  Next, the three drive 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 located in the gap CL1 is curved upward by the restricting plate 47 than the conveyance path R1. 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. 8 (G)). In the pressing step, it is preferable that the wavy fold line BL1 be located at the curved portion. Thereby, the flat sheet S1 is folded at the mountain fold line of the wavy fold line BL1. Thereafter, when the press pair 51 is opened to change the rotational directions of the three drive rollers 41, the flat sheet S1 is stretched back and forth in the feeding direction X, and the curved state is released (FIGS. 8H to 8I). reference).

  Thus, the corrugated sheet S2 can be obtained by alternately performing the valley-folding operation and the mountain-folding operation in the bending unit 40. Although the mountain folding operation is performed after the valley folding operation here, 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 drive roller 41 and the driven roller 42, and the middle portion thereof is not restricted by other members. , Curved in a free state. That is, such a curved state is deformable in the feed direction X. Since pressing is performed on the curved portion in such a state, the flat sheet S1 is unlikely to be wrinkled, wrinkled or broken. 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 pressing is performed on the curved portion in such a state, the flat sheet S1 is unlikely to be wrinkled, wrinkled or broken.

(Bending process)
In the bending unit 60, the pair of the main support rod 61 and the sub support 63 sandwiches the corrugated sheet S2 by the main side drive unit 62 and the secondary side drive unit 64 (see FIG. 9). Here, since the press surface 51F of the press pair 51 escapes from the intersection point T1 (see FIG. 1) of the wavy folds BL1, an unpressed portion remains in the set portion of the wavy folds BL1. At this time, it is preferable that the main support rod 61 touch this unpressed portion. Thus, the bending step 16A can be smoothly performed while suppressing the wrinkles, wrinkles and tears of the corrugated sheet S2.

  It is preferable that the corrugated sheet S2 sandwiched by the pair of the main support rod 61 and the secondary support 63 be in a zigzag state that is bent at the setting position of the parallel fold line BL2. Thereby, it is possible to smoothly perform the folding step 16B by the sandwiching structure 72 while suppressing the wrinkles, wrinkles and tears of the corrugated sheet S2.

(Folding process)
Next, the pair of the main support rod 61 and the sub support 63 is conveyed to the mounting stage 71 by the main drive unit 62 and the sub drive unit 64. The pressing plate 75D is pressed from both sides in the feed direction X toward the valley fold line of the parallel fold line BL2. Thus, the corrugated sheet S2 is bent in a zigzag shape. Thereafter, bending of the valley folding line proceeds in the corrugated sheet S2 by the rotation of the rotational arm 75A and the pressing on the corrugated sheet S2 by the pressing plate 75D (see FIG. 10B). When bending at the valley folding line of the corrugated sheet S2 is sufficiently performed (see FIG. 11A), the sandwiching by the press block 72A is performed. Then, after the sandwiching of the corrugated sheet S2 by the press block 72A is started, the pressing plate 75D is separated from the corrugated sheet S2 and the pushing is released (see FIG. 11B). Thereafter, the mountain-folded and valley-folded in the parallel fold BL2 are alternately performed on the corrugated sheet S2 by the press 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 efficiently mass-produced. Furthermore, in the manufacturing process, creases, wrinkles, tears, and the like of the flat sheet S1 and the corrugated sheet S2 are less likely to occur.

  As shown in FIG. 5, in the pressing plate 75D, the pressing side 75H pressed against the corrugated sheet S2 is preferably oblique to the height direction Z. As shown in FIG. That is, it is preferable that the angle θ2 of the pressing side 75H with respect to the XY plane is an acute angle. As a result, the corrugated sheet S2 can be pressed gradually from the lower side to the upper side, that is, the corrugated sheet S2 can be bent gradually from the lower side to the upper side. Further, it is preferable that a guide protrusion 75G be provided above the pressing portion 75H. Due to the guide projection 75G, the corrugated sheet S2 is less likely to be lifted upward by the pressing operation by the pressing plate 75D.

  In the above embodiment, the foldable body 4 is manufactured using the flat sheet S1 having the wavy folds BL1 and the parallel folds BL2. However, the present invention is not limited thereto, and may be made from the flat sheet S1 having no wavy folds BL1. In this case, positioning in the feeding direction X or pressing may be performed with respect to the setting position of the wavy fold BL1 instead of the wavy fold BL1.

  In the above embodiment, the restriction plate 47 connected in the width direction Y is used, but the present invention is not limited to this. You may use the regulation board 47 located in a line with predetermined | prescribed pitch in the width direction Y. FIG.

  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, but the present invention is not limited to this, and a predetermined position of the flat sheet S1 may be 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 which can be opened and closed. However, 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 weakly curved state in the curved portion W1 (see FIG. 12A) and the strongly curved state in the curved portion W1 (see FIG. 12B) , Flat sheet S1 is switched alternately. By performing this switching a predetermined number of times, the stiffness of the curved portion W1 can be removed, and it becomes easy to bend. The curved portion W1 is preferably a wavy fold line BL1.

  Although the bending unit 60 including the main support rod 61, the secondary support 63, and the secondary drive unit 64 is used in the above embodiment, the present invention is not limited to this, and the secondary support 63 and the secondary side. The drive unit 64 may be omitted. In this case, for any main support bar 61, the main support bar 61 located next to the main support bar 61 also functions as the sub support 63 (FIG. 13).

  By the way, a corrugated sheet S2 in which mountain folds and valley folds are alternately performed at the wavy folds BL1 is temporarily stored in the temporary storage unit 44. However, in the temporary accommodation unit 44, the corrugated fold BL1 on the upstream side of the corrugated sheet S2 can not be maintained in the folded state and may be opened (see FIG. 14A). In the corrugated sheet S2 in this state, conveyance by the bending unit 60 becomes difficult. Therefore, in order to create a broken state (see FIG. 14C) of the wavy fold line BL1 on the upstream side, the temporary accommodation unit 44 has a downstream end projecting portion 44T that protrudes from the downstream end of the mounting surface 44S, It is preferable to have a recess 44K formed on the mounting surface 44S on the upstream side of the end protrusion 44T, an arm 44A disposed in the recess 44K, and a pivot shaft 44X of the arm 44A. The rotation angle θA of the arm 44A may be less than 90 °, or may be 90 ° or more (eg, 120 °). The control unit 90 is in the accommodation state (FIGS. 14A and 14C) accommodated in the recess 44K and the projection state (FIG. 14B) projecting from the recess 44K by the drive of the pivot shaft 44X. The arm 44A can be switched between them. When the arm 44A switches from the accommodated state to the protruded state, the corrugated sheet S2 tends to move to the downstream side while the upstream-side wavy fold BL1 is in the valley-folded state. The downstream side of the corrugated sheet S2 is restricted in movement by the downstream end projecting portion 44T, so that the corrugated sheet S2 is sandwiched by the downstream end projecting portion 44T and the arm 44A in the accommodated state. Thus, the valley-folded state of the wavy fold BL1 on the upstream side can be created. The projecting state of the arm 44A may be maintained until conveyance by the bending unit 60 is performed. Of course, if it is possible to maintain the broken state of the wavy fold line BL1 on the upstream side by temporarily setting the arm 44 in the projecting state (FIG. 14B) (FIG. 14C), the conveyance by the bending unit 60 is Before being performed, the arm 44A may be returned from the protruded state to the accommodated state.

  The present invention is a preliminary folding device that performs preliminary folding of the sheet at a cross fold crossing the mountain fold or the valley fold with respect to the sheet in which the mountain fold and the valley fold are alternately arranged, A first support member supporting the set position of the crossing fold from the first side with reference to the second side, and a second support member supporting the sheet from the second side opposite to the first side And a supporting member moving unit for performing relative movement between the first supporting member and the second supporting member, and the second supporting member is further to the left than the first supporting member of the sheet. A left side supporting member for supporting the right side supporting member and a right side supporting member supporting the right side of the first supporting member of the sheet, the supporting member moving unit is supported by the left side supporting member and the right side supporting member The With respect to the sheet, characterized in that pressing the said first support member. In addition, it is preferable that pressing with respect to the sheet by the first support member is performed first at a crossing portion with the mountain fold or the valley fold in the setting position of the cross fold. Furthermore, it is preferable that the first support member is inclined with respect to the mounting surface on which the sheet is mounted.

  The present invention is not limited to the above-described embodiment, and it goes without saying that various modifications can be made without departing from the scope of the present invention.

2 Folding structure 4 Folding body 10 Manufacturing method of folding body 12 Delivery process 14 Wave folding process 14A Curving process 14B Press process 16 Parallel folding process 16A Bending process 16B Folding process 20 Manufacturing facility of folding structure 30 Delivery unit 31 Case 32 Suction cup 35 Roller 40 Curved unit 41 Drive roller 42 Driven roller 44 Temporary accommodation unit 47 Guide plate 47T Projected ridge 50 Press unit 51 Press pair 51 F Press surface 60 Bend unit 61 Main support bar 62 Main drive unit 63 Follower support 64 Follower drive unit 70 folding unit 71 mounting stage 72 pinching structure 80 accommodation unit 81 opening / closing door 82 accommodation space 90 control unit

In the sheet folding apparatus of the present invention, when the parallel fold is defined as including both the fold position before the fold is provided to the sheet and the fold line provided to the sheet, the wavy fold is a plurality of line segments Are arranged in a zigzag shape and extend in a predetermined direction and are arranged at predetermined intervals in a direction crossing the predetermined direction, and the parallel folds are arranged parallel at a predetermined interval in the longitudinal direction of the wavy folds And passing through the bent portion of the wavy fold, and from the first side with respect to the sheet in which the mountain fold and the valley fold are alternately performed in the longitudinal direction of the parallel fold from the first side, A first pressing member pressing against the valley fold line of the parallel fold of 1, and a valley from the second side opposite to the first side with respect to the parallel fold adjacent to the first parallel fold Fold line , A pressing member moving unit for performing relative movement between the first pressing member and the second pressing member, the first pressing member, and the second pressing And a folding unit that folds the sheet in a folded state by pressing with a member, the pressing member moving unit being configured to position the first pressing member between the plurality of second pressing members. It is characterized in that it is switchable between a first state in which the first state is stored and a second state which is retracted from the first state.

The present invention is a manufacturing method of a folded body formed by folding a sheet with a corrugated fold and a parallel fold, wherein the corrugated fold and the parallel fold are provided at a fold position before the fold is provided to the sheet and the sheet. The wave-like folds, when defined as including both with a folding line, are a series of zigzag line segments extending in a predetermined direction and aligned at a predetermined interval in a direction intersecting the predetermined direction. The parallel folds are arranged parallel to each other at predetermined intervals in the longitudinal direction of the wavy folds and pass through the bends of the wavy folds, and the mountain folds and valleys extend in the longitudinal direction of the parallel folds. The first pressing member is pressed against the sheet on which the folding is alternately performed on the wavy fold against the valley fold line of the first parallel fold from the first side And pressing the second pressing member against the valley fold line from the second side opposite to the first side with respect to the parallel fold next to the first parallel fold; It is the said zigzag-shaped said sheet as pressed by said 1st pressing member and said 2nd pressing member, Comprising: The said pressing member is used using the press member distribute | arranged to the both sides of the said sheet in the longitudinal direction of the said wavy fold. A pinching step for pinching the sheet, and a folding step performed after the pinching step and using the press member to fold the sheet, with release of pressing by the first pressing member and the second pressing member. It is characterized by having.

The present invention is a manufacturing method of a folded body formed by folding a sheet with a corrugated fold and a parallel fold, and when the corrugated fold and the parallel fold are defined as fold lines provided in the sheet, the corrugated fold is And a plurality of line segments extending in a zigzag direction and extending in a predetermined direction and being arranged at a predetermined interval in a direction intersecting the predetermined direction, and the parallel folds are predetermined in the longitudinal direction of the wavy folds. The gap is parallel to the spacing and passes through the bent portion of the wavy fold, and the sheet in which the mountain fold and the valley fold are alternately performed in the longitudinal direction of the parallel fold is performed on the sheet, The first pressing member is pressed against the valley fold line of the first parallel fold from the 1 side, and the first parallel member next to the first parallel fold is subjected to the first A pressing step of pressing the second pressing member against the valley fold line from the second side opposite to the side, and the pressing by the first pressing member and the second pressing member And a pinching step of pinching the sheet using pressing members disposed on both sides of the sheet in the longitudinal direction of the wavy fold, which is performed after the pinching step, which is the first pressing. A folding step of folding the sheet using the press member together with release of the pressing by the member and the second pressing member , and the mountain fold and the valley fold are alternately made in the longitudinal direction of the parallel fold An intermediate folding step of forming the sheet performed at a wavy fold line, wherein a first sheet portion of the sheet and a second sheet separated from the first sheet portion in the conveying direction of the sheet When the sheet portion and the first intermediate sheet portion between the first sheet portion and the second sheet portion are defined, the intermediate folding step curves the first intermediate sheet portion to one side. A side bending step, and a one side folding step of folding at the one side curved with the wavy fold line, and in the one side bending step, the other side guide disposed on the other side with respect to the transport path of the sheet The conveyance to the upstream side of the second sheet portion and the conveyance to the downstream side of the first sheet portion are performed in a state where the first intermediate sheet portion is opposed to the member, and the other side guide member with the other side ridge protruding toward the other side edge line, as well as to regulate the bending of the first intermediate sheet portion to the other side, it urges the curvature of the first intermediate sheet portion to the one side And the above one In the side folding step, between the first curved state in which the wavy folds of the first intermediate sheet portion are curved and the second curved state in which the wavy folds are curved more than the first curved state. And alternately switching .

Claims (12)

A parallel fold is defined as including both a fold position before a fold is provided to a sheet and a fold line provided to the sheet,
The wavy folds are a series of zigzag line segments extending in a predetermined direction and being spaced apart in a direction intersecting the predetermined direction,
The parallel folds are arranged parallel to each other at predetermined intervals in the longitudinal direction of the wavy folds and pass through the bent portions of the wavy folds.
The ridge fold and the valley fold are alternately pressed in the longitudinal direction of the parallel fold against the sheet on which the wavy fold is performed, from the first side to the valley fold line of the first parallel fold. A first pressing member,
A second pressing member pressing against a valley fold line from a second side opposite to the first side with respect to a parallel fold 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;
And a folding unit configured to fold the sheet folded in a state of being pressed by the first pressing member and the second pressing member.
The pressing member moving unit can switch the first pressing member between a first state where the first pressing member is positioned between the plurality of second pressing members and a second state where the first pressing member is retracted from the first state. Sheet folding apparatus characterized in that. The first pressing member and the second pressing member are formed in a plate shape,
The first pressing member supports the valley fold side pressing line located at the center of the sheet,
The pressing member moving unit moves the first pressing member and the second pressing member separately in the thickness direction of the plate and in the surface direction of the plate,
The relative movement by the pressing member moving unit causes the first pressing member and the second pressing member to approach in the thickness direction and approach in the plate surface direction. Sheet folding device. The folding unit is
A pair of press blocks having a press surface for pressing the sheets;
A press block moving mechanism for relatively moving the pair of press blocks;
The plurality of second pressing members are disposed between the pair of press blocks,
3. The press block moving mechanism according to claim 1, wherein when the first pressing member is in the first state, the press block is moved closer to the first pressing member from both sides of the first pressing member. Sheet folding device. The first pressing member and the second pressing member have contact sides touching the sheet,
The sheet folding device according to any one of claims 1 to 3, wherein the contact side is oblique to the placement surface on which the sheet is placed.
A method of manufacturing a folded body comprising folding a sheet with a corrugated fold and a parallel fold, comprising:
When the wavy folds and the parallel folds are defined as including both a fold position before the fold is provided to the sheet and a fold line provided to the sheet,
The wavy folds are a series of zigzag line segments extending in a predetermined direction and being spaced apart in a direction crossing the predetermined direction.
The parallel folds are arranged parallel to each other 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 the mountain fold and the valley fold are alternately performed in the longitudinal direction of the parallel fold with respect to the corrugated crease, the first side with respect to the valley fold line of the first parallel fold from the first side 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. Pushing step,
It is the said zigzag-shaped said sheet as pressed by said 1st pressing member and said 2nd pressing member, Comprising: The said pressing member is used using the press member distribute | arranged to the both sides of the said sheet in the longitudinal direction of the said wavy fold. Step sandwiching the sheet, and
And a folding step of folding the sheet by using the pressing member together with the release of the pressing by the pressing member.   The method according to claim 5, wherein in the pressing step, the pressing of the valley folding line by the pressing member is performed from the lower side to the upper side. The method further comprises an intermediate folding step of forming the sheet in which the mountain folds and valley folds are alternately performed along the wavy folds in the longitudinal direction of the parallel folds,
Among the sheets, a first sheet portion, a second sheet portion separated from the first sheet portion in the sheet conveying direction, and a first intermediate sheet portion between the first sheet portion and the second sheet portion And when defined respectively
The intermediate folding step is
A one-side bending step of bending the first intermediate sheet portion to one side;
One side folding step of folding at the one side curved with the wavy folds;
In the one-side bending step, the first intermediate sheet portion is conveyed to the upstream side of the second sheet portion in a state in which the first intermediate sheet portion faces the other side guide member disposed on the other side with reference to the sheet conveyance path. And conveying the first sheet portion to the downstream side,
The other side guide member includes the other side ridgeline protruding toward the transport path,
The other side ridgeline regulates curvature of the intermediate sheet portion to the other side, and promotes curvature of the intermediate sheet portion to the one side,
In the one-side folding step, pressing is performed on the wavy folds of the first intermediate sheet portion curved in one side using a press unit disposed on one side with reference to the conveyance path of the sheet. The manufacturing method of the fold body of Claim 5 or 6 characterized by these. When, among the sheets, 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 are respectively defined,
The intermediate folding step is
A second side bending step of bending the second intermediate sheet portion to the other side;
The other side folding step of folding at the other side curved at the wavy fold;
In the other side curving step, the second intermediate sheet portion is conveyed to the upstream side of the third sheet portion in a state where the second intermediate sheet portion is opposed to the one side guide member disposed on one side with reference to the sheet conveyance path. And transport the second sheet portion to the downstream side,
The one side guide member includes a one side ridge line protruding toward the transport path,
The one side ridgeline regulates the curvature of the intermediate sheet portion to the one side, and promotes the curvature of the intermediate sheet portion to the other side.
In the other side folding step, pressing is performed on the wavy folds of the second intermediate sheet portion that is curved to the other side using a press unit disposed on the other side with respect to the conveyance path of the sheet. The manufacturing method of the folding body of Claim 7 characterized by these.   The conveyance of each sheet portion performed for the bending of each intermediate sheet portion is performed by rotation of a roller holding the sheet portion or movement of a clamp member holding the sheet portion. The manufacturing method of the fold body as described in 7 or 8. The method for manufacturing a folded body according to any one of claims 7 to 9, wherein the press unit is provided with a linear press mark so as to escape the bent portion of the wavy fold.
A method of manufacturing a folded body comprising folding a sheet with a corrugated fold and a parallel fold, comprising:
When the wavy folds and the parallel folds are defined as fold lines provided on the sheet,
The wavy folds are a series of zigzag line segments extending in a predetermined direction and being spaced apart in a direction crossing the predetermined direction.
The parallel folds are arranged parallel to each other 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 the mountain fold and the valley fold are alternately performed in the longitudinal direction of the parallel fold with respect to the corrugated crease, the first side with respect to the valley fold line of the first parallel fold from the first side 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. Pushing step,
It is the said zigzag-shaped said sheet as pressed by said 1st pressing member and said 2nd pressing member, Comprising: The said pressing member is used using the press member distribute | arranged to the both sides of the said sheet in the longitudinal direction of the said wavy fold. Step sandwiching the sheet, and
And a folding step, which is performed after the pinching step and is used to fold the sheet by using the pressing member, with the release of the pressing by the pressing member.
The method further comprises an intermediate folding step of forming the sheet in which the mountain folds and valley folds are alternately performed along the wavy folds in the longitudinal direction of the parallel folds,
Among the sheets, a first sheet portion, a second sheet portion separated from the first sheet portion in the sheet conveying direction, and a first intermediate sheet portion between the first sheet portion and the second sheet portion And when defined respectively
The intermediate folding step is
A one-side bending step of bending the first intermediate sheet portion to one side;
One side folding step of folding at the one side curved with the wavy folds;
In the one-side bending step, the first intermediate sheet portion is conveyed to the upstream side of the second sheet portion in a state in which the first intermediate sheet portion faces the other side guide member disposed on the other side with reference to the sheet conveyance path. And conveying the first sheet portion to the downstream side,
The other side guide member includes the other side ridgeline protruding toward the transport path,
The other side ridgeline regulates curvature of the intermediate sheet portion to the other side, and promotes curvature of the intermediate sheet portion to the one side,
In the one-side folding step, pressing is performed on the wavy folds of the first intermediate sheet portion curved in one side using a press unit disposed on one side with reference to the conveyance path of the sheet. A method of manufacturing a folded body characterized by When, among the sheets, 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 are respectively defined,
The intermediate folding step is
A second side bending step of bending the second intermediate sheet portion to the other side;
The other side folding step of folding at the other side curved at the wavy fold;
In the other side curving step, the second intermediate sheet portion is conveyed to the upstream side of the third sheet portion in a state where the second intermediate sheet portion is opposed to the one side guide member disposed on one side with reference to the sheet conveyance path. And transport the second sheet portion to the downstream side,
The one side guide member includes a one side ridge line protruding toward the transport path,
The one side ridgeline regulates the curvature of the intermediate sheet portion to the one side, and promotes the curvature of the intermediate sheet portion to the other side.
In the other side folding step, a first curved state in which the wavy folds of the second intermediate sheet portion are curved, and a second curved state in which the wavy folds are curved more than the first curved state The method for manufacturing a folded body according to claim 11, wherein switching is performed alternately.

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