WO2023210544A1 - Dispositif de pliage de papier - Google Patents

Dispositif de pliage de papier Download PDF

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Publication number
WO2023210544A1
WO2023210544A1 PCT/JP2023/015999 JP2023015999W WO2023210544A1 WO 2023210544 A1 WO2023210544 A1 WO 2023210544A1 JP 2023015999 W JP2023015999 W JP 2023015999W WO 2023210544 A1 WO2023210544 A1 WO 2023210544A1
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WO
WIPO (PCT)
Prior art keywords
paper
folding
switching gate
gate plate
plate
Prior art date
Application number
PCT/JP2023/015999
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English (en)
Japanese (ja)
Inventor
力 宮本
政信 大橋
Original Assignee
デュプロ精工株式会社
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Filing date
Publication date
Application filed by デュプロ精工株式会社 filed Critical デュプロ精工株式会社
Publication of WO2023210544A1 publication Critical patent/WO2023210544A1/fr

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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H45/00—Folding thin material
    • B65H45/12—Folding articles or webs with application of pressure to define or form crease lines
    • B65H45/14—Buckling folders
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H45/00—Folding thin material
    • B65H45/12—Folding articles or webs with application of pressure to define or form crease lines
    • B65H45/16—Rotary folders

Definitions

  • the present invention relates to a paper folding device. More specifically, the present invention relates to a paper folding device suitable for a bag making machine that manufactures envelopes.
  • a paper folding device for folding a medium such as a paper (for example, Patent Document 1) transports the paper and inserts the leading edge of the paper into a paper insertion space (separate flow path).
  • a paper insertion space separate flow path
  • the paper is bent outside the paper insertion space to form a curved part, and this curved part is connected to the rollers. It is configured to fold the medium by being pulled in between and folding the paper.
  • a paper folding device equipped with a stopper such as the technique disclosed in Patent Document 1 described above needs to adjust the stopper position according to various folding specifications, and when adjusting the stopper position, the stopper position must be The operator must manually adjust the stopper, or the device must be equipped with an automatic stopper movement mechanism. When the operator manually adjusts the stopper position, the operation is complicated and not easy to use. Further, when the device is provided with an automatic stopper movement mechanism, the operability is good, but the cost is high.
  • the applicant of the present application has proposed a bag making machine equipped with a paper folding device having a novel configuration as shown in Patent Document 2 as an invention to solve the various problems in the conventional technology as explained above.
  • Patent Document 2 since there is no need to provide a paper insertion space (separate flow path) and a stopper as the paper folding mechanism, the structure can be constructed simply and inexpensively without complicating the structure. Further, since the control means automatically adjusts the folding position according to various folding specifications, it is possible to provide a paper folding device with good operability.
  • Patent Document 2 proposes a new problem with the paper folding device with a new configuration proposed by the present applicant.
  • Patent Document 2 proposes a new configuration proposed by the present applicant.
  • the inclination angle of the switching gate plate should be increased (inclination angle ⁇ 2) when using thick paper, and reduced (inclination angle ⁇ 2) when using thin paper.
  • An inclination angle ⁇ 1) is necessary, and there is almost no common inclination angle range that can solve both problems at once, regardless of the paper type (thick paper or thin paper).
  • the present invention has been made in view of such newly discovered novel technical problems, In view of the above-mentioned problems with the conventional paper folding apparatus, it is an object of the present invention to provide a simple and inexpensive structure without complicating the structure, and which does not require the operator to input the paper type (thickness) in advance. An object of the present invention is to provide a paper folding device with good operability and without any problems. Another object is to be able to prevent the occurrence of hitting noise regardless of the type of paper.
  • the invention according to claim 1 provides a paper folding device that folds a flat sheet of paper while transporting it along a paper transporting surface, the paper folding device being arranged on the upstream side in the paper transporting direction.
  • the apparatus includes folding plates arranged therein and a control means for controlling the operation of the entire apparatus, and the switching gate plate interferes with the paper being conveyed so that the leading edge of the paper reaches the second pair of conveyance rollers.
  • the folding plate can be switched between a second guiding position in which the paper is guided along the paper conveying surface toward the nip portion of the second pair of conveying rollers, and the folding plate is moved vertically while remaining in a substantially horizontal state. It is configured to be movable and can be switched between a folded position in which it abuts or is close to the switching gate plate disposed at the second guide position and a retracted position in which it retreats from the switching gate plate at a predetermined distance.
  • the control means guides the leading edge of the sheet being conveyed upward by the switching gate plate disposed at the first guiding position, and at least guides the leading edge of the sheet of paper upward.
  • the switching gate plate Before the end of the paper hits the upper surface of the upper roller, the switching gate plate is once placed in the separation position to avoid the leading edge of the paper from hitting the upper surface of the upper roller; After returning the sheet to the first guiding position and guiding the leading edge of the sheet to pass the upper surface of the upper roller by a predetermined amount, the switching gate plate is switched to the second guiding position, and then the By lowering the folding plate located at the retracted position to the folding position in a substantially horizontal state so as to sandwich the paper on the switching gate plate, the leading end of the paper is folded back along the surface of the upper roller. It is characterized by the fact that it is controlled as follows.
  • the timing for returning the switching gate plate from the separation position to the first guide position is such that the leading end of the sheet is at the separation position.
  • the leading edge of the paper returned to the first guide position The position is characterized in that the position is at least a timing beyond the position of an intersection where an imaginary extension line of the upper surface of the switching gate plate intersects with the upper surface of the upper roller.
  • the invention according to claim 3 is the paper folding apparatus according to claim 1 or 2, wherein the inclination angle of the switching gate plate at the first guide position is such that the switching gate plate is guided upward on the switching gate plate.
  • the paper is characterized by being set at an angle that will not buckle even if the paper type is thin paper.
  • the invention according to claim 4 is the paper folding apparatus according to claim 1 or 2, in which the switching gate plate is moved to the first guide position even if the paper type is cardboard, as a countermeasure against hitting noise.
  • the present invention is characterized in that by switching from the position to the separated position, the leading end of the paper is prevented from hitting the upper surface of the upper roller, thereby preventing the occurrence of a hitting sound.
  • the invention according to claim 5 is the paper folding device according to claim 1 or 2, wherein after folding the leading end of the paper by lowering the folding plate, the control means further controls the first A pair of transport rollers transports the folded leading end of the sheet of paper toward the nip of the second pair of transport rollers, and the nip of the second pair of transport rollers folds the paper.
  • the paper is characterized in that the paper is controlled to be folded by pressing the leading end folding part of the paper by sandwiching and transporting the leading end folding part of the sheet.
  • a crease processing section is further provided on the upstream side of the first conveyance roller pair in the paper conveyance direction, and the crease processing section
  • the processing section is characterized in that it is configured to form a crease in advance at the fold line when the flat paper is folded.
  • the invention according to claim 7 is the paper folding device according to claim 1 or 2, wherein the switching gate plate is arranged at the second guide position, and the folding plate is arranged at the folding position.
  • the bag making machine is characterized in that the distance between the folding plate and the switching gate plate is such that at least a gap sufficient to transport the paper is secured between the folding plate and the switching gate plate.
  • the control means guides the leading end of the sheet being conveyed upward by the switching gate plate disposed at the first guiding position, and at least guides the leading end of the sheet.
  • the switching gate plate Before the sheet hits the upper surface of the upper roller, the switching gate plate is placed in the separation position to avoid the leading edge of the paper from hitting the upper surface of the upper roller, and then the switching gate plate is placed in the first guiding position. Therefore, even when thick paper is used, it is possible to effectively prevent the occurrence of a collision sound caused by the leading edge of the paper hitting the upper surface of the upper roller.
  • the timing for returning the switching gate plate from the separation position to the first guide position is such that the switching gate plate Assuming that the paper is returned from the separation position to the first guide position, the position of the leading edge of the paper returned to the first guide position is at least between the virtual extension line of the top surface of the switching gate plate and the top of the upper roller.
  • the inclination angle of the switching gate plate at the first guide position is set to an angle that does not buckle even if the type of paper guided upward on the switching gate plate is thin paper. Since this is set, there is no need for the operator to input the paper type (thickness) in advance, and it is possible to provide a paper folding device with good operability. Furthermore, it is possible to prevent the occurrence of hitting noise regardless of the type of paper.
  • the switching gate plate is switched from the first guide position to the separation position, so that the leading edge of the paper is It is possible to avoid hitting the upper surface of the upper roller, thereby preventing the occurrence of hitting noise.
  • a crease processing section is further provided on the upstream side of the first transport roller pair in the paper transport direction, and the crease processing section is configured to perform a crease processing section when folding the flat sheet of paper.
  • a crease is formed in advance on the fold line to create a starting point for folding, so it can be folded neatly and accurately. Furthermore, printing cracks that occur during folding of paper can be suppressed.
  • the folded leading edge of the paper is guided through the gap between the adjacent switching gate plate and the folding plate. Since the sheet is conveyed, it can be reliably delivered to the pressing section formed by the nip section of the pair of conveying rollers at the next stage without wrinkles or the like.
  • FIG. 1 is a schematic overall configuration diagram of a bag making machine according to a first embodiment of the present invention.
  • FIG. 2 is a plan view showing the state of paper processed by the bag making machine of FIG. 1;
  • FIG. 3 is a plan view showing a state in which the sheet of FIG. 2 has been folded;
  • FIG. 2 is a perspective view showing a state in which a Western-style envelope is being manufactured.
  • FIG. 6 is a diagram showing how the paper is processed in the second folding section.
  • FIG. 6 is a diagram showing how the paper is processed following FIG. 5;
  • FIG. 7 is a diagram showing how the paper is processed following FIG. 6;
  • FIG. 8 is a diagram showing how the paper is processed following FIG. 7;
  • FIG. 6 is a diagram showing how the paper is processed in the second folding section.
  • FIG. 6 is a diagram showing how the paper is processed in the second folding section.
  • FIG. 6 is a diagram showing how the paper is processed in the second folding section.
  • FIG. 6 is a diagram showing how the paper is processed in the second folding section. It is a figure which shows the state before and after folding back the flap in a 1st folding part. It is a figure which shows the drive mechanism of the folding plate in a 2nd folding part. It is a figure which shows the drive mechanism of the folding plate in a 2nd folding part. It is a figure which shows the drive mechanism of the switching gate plate in a 2nd folding part. It is a figure which shows the drive mechanism of the switching gate plate in a 2nd folding part.
  • FIG. 1 shows an embodiment of a bag making machine 10 that employs the paper folding device (second folding section 6) of the present invention.
  • FIG. 1 is an overall configuration diagram of a bag making machine 10.
  • the bag making machine 10 includes, in order from the upstream side in the conveyance direction, a paper feeding section 1, a first crease processing section 2, a second crease processing section 4, a first folding section 3, a glue application section 5, a second folding section 6, and A paper discharge section 7 is provided in the apparatus main body 10A.
  • a typical "Western-style envelope” has a horizontally long rectangular shape, and a sealing opening is formed on the long side.
  • the bag making machine 10 transports the flat paper 100 shown in FIG. 2(a) in the F direction while conveying it as shown in FIGS. 2(b) and 2(c). By processing, a Western-style envelope 90 is manufactured.
  • the paper 100 is made up of a front surface section 101, a rear surface section 102, glue substitute pieces 103 extending from both sides of the rear surface section 102, and a rearmost surface section 104.
  • the paper 100 is folded at the first fold line 111, which is the boundary line between the rear surface part 102 and the piece part 103, as shown in FIG. 2(b), and is further folded as shown in FIG. 2(c).
  • the folding process is performed at a second fold line 112 which is a boundary line between the front surface part 101 and the rear surface part 102.
  • Glue is applied to the surface of the piece 103 folded back at the first fold line 111.
  • both edges of the front surface portion 101 folded back at the second fold line 112 are joined to the piece portion 103.
  • the first fold line 111 is along the conveyance direction.
  • the second fold line 112 is along the direction perpendicular to the conveyance direction (ie, the width direction).
  • the product may be the Western-style envelope 90 shown in FIG. 2(c), but by processing the Western-style envelope 90 shown in FIG. 2(c) as shown in FIG. 3 while conveying it in the F′ direction,
  • the rearmost surface portion 104 may be further folded at a third fold line 113 that is a boundary line between the rear surface portion 102 and the rearmost surface portion 104 .
  • the paper feeding unit 1 includes an air suction belt type air feeding unit 12, an elevator type paper feeding tray 11 that ascends and descends depending on the amount of paper loaded, and further conveys the paper sent out by the air paper feeding unit 12. It has a conveyance roller 81 that conveys the image to the downstream side in the direction.
  • the air feeding unit 12 also includes a sensor 22 that detects that the topmost sheet of paper stacked on the paper feeding tray 11 is attracted to the bottom surface of the air feeding unit 12; A sensor 21 is arranged to detect the upper limit position of the uppermost surface of the paper stacked thereon.
  • the bag making machine 10 includes seven pairs of conveyance rollers 82, 83, 84, 85, 86, 87, and 88 in addition to the conveyance roller 81.
  • the seven transport roller pairs constitute a transport surface 200 on which the paper 100 is transported, and the transport surface 200 is on the same plane from the air paper feeding unit 12 to the transport roller pair 88.
  • sensors 23, 24, 25, 26, 27, and 28 are arranged to detect the passage of sheets at each position (detect double feeding). ing.
  • Each sensor uses, for example, an optical transmission sensor.
  • the first crease processing section 2 is composed of an upper mold with a convex upper part and a lower mold with a concave lower part, and serves as a second fold 112 and a third fold 113 of the paper 100 to convey the paper.
  • a horizontal crease is formed in a direction perpendicular to the direction.
  • the crease processing section 2 a known mechanism can be adopted.
  • the second crease processing section 4 has an upper crease blade with a round blade shape and a convex part formed on the outer periphery, and a lower crease blade with a round blade shape and a concave part formed on the outer periphery part.
  • the first crease processing section 4 a known mechanism can be adopted.
  • the first folding section 3 includes a pair of folding devices 3a and 3b that are arranged opposite to each other on both sides in the width direction in a direction perpendicular to the paper conveyance direction.
  • Each folding device 3a, 3b has a flap 32 plate that rotates around a rotation axis 31 along the conveyance direction, and as shown in FIG. By rotating the flap plate 32, the piece 103 of the paper 100 placed on the flap plate 32 is folded inward to match the surface of the rear surface part 102, as shown in FIG. 12(b). I can do it.
  • the glue applicator 5 includes a pair of applicators 5a and 5b arranged oppositely on both sides in the width direction. Note that the coating device 5a and the coating device 5b have a laterally symmetrical configuration.
  • the coating devices 5a and 5b have a nozzle section, a position setting mechanism, and a vertical drive mechanism (not shown).
  • the nozzle section is configured to apply glue to the paper being conveyed at a predetermined timing.
  • the second folding unit 6 is a paper folding device that folds the flat sheet of paper 100 while conveying it along the conveyance surface 200. , a second conveyance roller pair 87 disposed on the downstream side in the paper conveyance direction, a switching gate plate 63 disposed between both roller pairs, and a folding plate 62 disposed above the switching gate plate 63. We are prepared.
  • the switching gate plate 63 interferes with the paper 100 being transported and guides the leading edge of the paper 100 upward to pass the upper surface of the upper roller 871 of the second transport roller pair 87. and a second guiding position where the folding plate 62 is guided in a substantially horizontal direction toward the nip portion 873 of the second pair of conveying rollers 87. It is configured to be movable in the direction, and can be switched between a folded position in the vicinity of the switching gate plate 63 disposed at the second guide position and a retracted position in which it is retreated from the switching gate plate at a predetermined distance. It becomes.
  • the switching gate plate 63 is selectively arranged at the first guide position and the second guide position described above.
  • FIG. 15 shows the switching gate plate 63 in the second guiding position
  • FIG. 16 shows the switching gate plate 63 in the first guiding position.
  • FIG. 15(a) is a front view seen from the front in the paper conveyance direction
  • FIG. 15(b) is a sectional view seen from the direction C in FIG. 15(a).
  • FIG. 16(a) is a front view seen from the front in the paper conveyance direction
  • FIG. 16(b) is a sectional view seen from the direction D in FIG. 16(a).
  • the drive mechanism 64 for the switching gate plate 63 operates as follows. That is, when the motor 641 operates, the second pulley 644 rotates via the first pulley 642 and the transmission belt 643. Since the support shaft 631 of the switching gate plate 63 is connected to the second pulley 644, when the second pulley 644 rotates, the switching gate plate 63 rotates.
  • the rotation angle of the switching gate plate 63 is determined by detecting both edges of the light shielding plate 66 attached to the support shaft 631 of the switching gate plate 63 by the first detection means 67. It can be selectively arranged at the first guiding position and the second guiding position.
  • the switching gate plate 63 has a separated position (see 63b in FIG. 11(a)).
  • the separation position is set so that even if thick paper is used, the leading end of the paper 100 hits the upper surface of the upper roller 871 of the second conveying roller pair to prevent the occurrence of a hitting sound.
  • the rotation angle of the switching gate plate 63 at the separation position for example, after one edge of the light shielding plate 66 is detected by the first detection means 67, a predetermined number of steps of the motor 641 (stepping motor) is counted. Accordingly, the switching gate plate 63 can be selectively placed in the separated position. Details of the countermeasure against the hit sound will be described later.
  • the folding plate 62 is selectively placed in the folded position and the retracted position described above. 13 shows the folding plate 62 in the retracted position, and FIG. 14 shows the folding plate 62 in the folded position.
  • FIG. 13(a) is a front view seen from the front in the paper conveyance direction
  • FIG. 13(b) is a sectional view seen from the direction A in FIG. 13(a).
  • FIG. 14(a) is a front view seen from the front in the paper conveyance direction
  • FIG. 14(b) is a sectional view seen from the direction B in FIG. 14(a).
  • the drive mechanism 65 for the folding plate 62 operates as follows. That is, when the motor 651 operates, a drive gear (not shown) attached to the drive shaft of the motor 651 rotates, and an interlocking gear 655 engaged with the drive gear rotates.
  • a second link member 654 has its base fixed to the rotation shaft of the interlocking gear 655 so that it can rotate, and one end of the first link member 653 is attached to its free end.
  • a pinion 652 is attached to the other end of the first link member 653, and the pinion 652 meshes with a rack 656 that is stationary.
  • the first link member 653 converts the rotational motion of the second link member 654 into a linear motion (reciprocating motion) of the pinion 652 on the rack 656.
  • a folding plate 62 is attached to the rotating shaft of the pinion 652, and the folding plate 62 moves up and down (reciprocating) along the elongated hole 657 integrally with the linear movement (reciprocating) of the pinion 652.
  • the second detection means 68 detects both edges of a light shielding plate (not shown) attached to the rotating shaft of the interlocking gear 655, so that the folding plate 62 can be placed in the folding position. It can be selectively placed in the retracted position.
  • the pressing section 8 is composed of an upper mold 8a that can move up and down and a lower mold 8b that is immovable. By pinching, more pressure is applied and the folded portion is made stronger.
  • the paper discharge section 7 includes a pair of transport rollers 88 and a paper discharge tray 71.
  • the transport roller pair 88 is provided to operate as a discharge roller.
  • the conveying roller pair 88 is arranged near the second conveying roller pair 87 of the second folding section 6 and downstream in the conveying direction.
  • the paper discharge tray 71 is inclined obliquely upward from a position below the conveyance surface 200 and toward the downstream in the conveyance direction.
  • the paper 100 shown in FIG. 2 is placed on the paper feed tray 11. At this time, the front surface portion 101 is located on the downstream side in the conveyance direction. Then, a switch (not shown) is turned on to start operation.
  • the topmost sheet of paper 100 on the paper feed tray 11 is sucked by the air suction belt in the air paper feed unit 12 and sent out toward the pair of conveyance rollers 81, and the sheet of paper 100 is delivered to the pair of conveyance rollers 81.
  • the conveyance roller pair 81 further conveys the sheet to the downstream side in the conveyance direction.
  • it passes through the first crease processing section 2.
  • the first crease processing section 2 operates to form creases on the second fold line 112 and the third fold line 113 of the paper 100. This makes it easier for the front surface section 101 to fold back toward the rear surface section 102 side. Further, the rearmost surface portion 104 can be easily folded back toward the folded front surface portion 101 side.
  • the paper 100 conveyed from the first crease processing section 2 passes through the second crease processing section 4.
  • the first fold lines 111 (two places on the left and right sides in the width direction) of the paper 100 are placed directly below the crease blades (round blades) of the second crease processing section 4 installed at two places in the width direction perpendicular to the conveyance direction. positioned.
  • the second crease processing section 4 operates to form a crease on the first fold line 111. This makes it easier for the piece portions 103 (two locations on the left and right in the width direction) to be folded back inward.
  • the flap plate 32 rotates in a direction away from the outer lower guide plate 33. Then, the paper 100 with the piece 103 folded back is transported downstream in the transport direction by the transport roller pair 85 . The flap plate 32 that has been rotated outward is maintained in that state until the next sheet 100 arrives. Note that with the flap plate 32 rotated inward, the paper 100 with the folded piece 103 is conveyed downstream in the conveyance direction, and before the next sheet 100 is conveyed, the flap plate 32 is rotated outward. It may also be activated to move.
  • the paper 100 with the folded piece 103 is transported downstream in the transport direction by the transport roller pair 85 and passes through the glue application section 5 .
  • the glue applicator 5 when the folded pieces 103 on both sides of the paper 100 start passing, the nozzle parts 5a and 5b installed at two locations in the width direction perpendicular to the transport direction move downward. , comes into contact with the surface of the piece 103, and when the passage of the piece 103 is completed, the nozzle parts 5a, 5b move upward, and the nozzle parts 5a, 5b are separated from the surface of the piece 103. As a result, glue is applied to the surface of the folded piece 103.
  • the folded pieces 103 pass through the nozzle parts 5a, 5b while being pressed or after being pressed by a pair of transport rollers 85 located upstream of the nozzle parts 5a, 5b in the transport direction. do. Therefore, the glue application work using the nozzle parts 5a and 5b can be performed stably.
  • the second folding unit 6 is a paper folding device that folds the flat sheet of paper 100 while conveying it along the conveyance surface 200. , a second pair of conveyance rollers 87 disposed on the downstream side in the paper conveyance direction, a switching gate plate 63 installed on the paper conveyance surface 200 between both roller pairs, and a second conveyance roller pair 87 disposed opposite to the switching gate plate 63. It is equipped with a folding plate 62 and a control means (not shown) for controlling the operation of the entire device,
  • the switching gate plate 63 interferes with the paper 100 being transported, bends the paper transport direction outward from the paper transport surface 200, and directs the leading end of the paper 100 toward the surface of one of the rollers of the second transport roller pair 87. It is possible to switch between a first guide position where the sheet is guided and a second guide position where the sheet is guided along the paper conveyance surface 200 toward the nip portion 873 of the second pair of conveyor rollers 87;
  • the folding plate 62 is configured to be movable toward the switching gate plate 63 in a substantially horizontal state, and has a folding position close to the switching gate plate 63 disposed at a second guide position and a predetermined position from the switching gate plate 63. It is possible to switch between the evacuation position and the evacuation position at intervals,
  • the control means causes the leading edge of the paper 100 to pass by a predetermined distance toward the surface of one of the rollers of the second pair of transport rollers 87 by the switching gate plate 63 disposed at the first guide position. After guiding the switching gate plate 63 as shown in FIG. By lowering the paper 100 to this position, the leading end of the paper 100 is controlled to be folded back along the surface of one of the rollers of the second pair of transport rollers 87.
  • processing is performed sequentially as shown in (5-1) to (5-4) below.
  • the sheet 100 with glue applied to the piece 103 is conveyed to the second folding section 6 (in the F direction) by the conveyance roller pair 85.
  • the switching gate plate 63 is set upward toward the second conveyance roller pair 87 as the first guide position. Therefore, as shown in FIG. 5, the paper 100 is guided upward by the switching gate plate 63 so that the leading end of the paper 100 passes through the upper surface of the upper roller 871 of the second transport roller pair 87.
  • the conveyance is temporarily stopped.
  • the conveyance may be temporarily stopped when the leading edge of the paper 100 passes the upper surface of the upper roller 871 by a predetermined amount.
  • FIG. 5 shows that there is a gap between the paper 100 and the upper roller 871, the lower surface of the paper 100 normally rubs against the upper surface of the upper roller 871 as it passes to the stop position. Also, during this time, the folding plate 62 maintains the retracted position.
  • the width of the upper roller 861 of the first transport roller pair 86 is set so that it does not come into contact with the surface of the piece 103, so that the upper roller 861 of the first conveying roller pair 86 is set to have a width that does not make contact with the surface of the piece 103. Glue does not adhere to the first conveying roller pair 86.
  • the folding plate 62 moves the switching gate plate 63 to the second guide position (approximately horizontal position) while maintaining the retracted position.
  • the folding plate 62 placed at the retracted position is lowered to the folding position in a substantially horizontal state so as to sandwich the paper 100 on the switching gate plate 63.
  • the front surface portion 101 of the paper 100 is folded back from the second fold line 112 along the surface of the upper roller 871 of the second conveying roller pair 87.
  • the distance between the switching gate plate 63 and the folding plate 62 after being lowered is such that at least a gap sufficient for conveying the paper is secured between the folding plate 62 and the switching gate plate 63. do. For example, a gap of about 1 mm is ensured.
  • the structure can be constructed simply and inexpensively without complicating the structure.
  • the control means automatically adjusts the folding position according to various folding specifications, it is possible to provide a paper folding device with good operability. Furthermore, wrinkles are prevented from forming on the folded piece, and even when folding is performed, glue does not adhere to the inside of the folding mechanism such as a stopper and adversely affect the quality of the product.
  • the leading edge portion of the paper is further folded by the first pair of transport rollers 86.
  • the leading edge folded portion 105 of the paper after being folded is conveyed toward the nip portion 873 of the second pair of conveying rollers 87, and the leading edge folded portion 105 of the sheet is sandwiched between the nip portion 873 of the second pair of conveying rollers 87.
  • the leading end folding portion 105 of the paper is pressed and folded.
  • the entire front surface section 101 is folded back and aligned with the surface of the rear surface section 102, and at this time, both edges of the front surface section 101 are joined to the piece section 103.
  • a Western-style envelope 90 is obtained.
  • the paper 100 is transported in the F direction until the rearmost portion 104 of the paper 100 passes through the nip portion 863 of the first transport roller pair 86 by a predetermined amount.
  • the paper 100 is conveyed through the gap between the folding plate 62 and the switching gate plate 63 (while being guided by both plates). According to this, the sheet can be reliably transferred to the pressing section formed by the nip section 873 of the second pair of conveying rollers 87 at the next stage without wrinkles or the like.
  • the folded leading edge of the paper is controlled to be pressed by the nip part 873 of the second pair of conveyance rollers 87 and folded. , it is possible to reliably create a crease in the paper.
  • a crease processing section 2 is provided on the upstream side of the first transport roller pair 86 in the paper transport direction, and the crease processing section 2 is configured to cut the crease (second crease) when the flat paper 100 is folded. 112 and the third fold line 113) to form a crease in advance to create a folding starting point, it is possible to fold neatly and accurately. Furthermore, printing cracks that occur during folding of paper can be suppressed.
  • the angle is set so that it does not hit the upper surface 871a, the collision noise can be prevented, but if the inclination angle remains the same, especially if thin paper is used, it is difficult to stably raise the inclination of the switching gate plate. Another problem arises in that it cannot be moved and buckles.
  • the inclination angle of the switching gate plate should be increased (inclination angle ⁇ 2) when using thick paper to prevent collision noise, and when using thin paper, the inclination angle should be increased to prevent buckling.
  • inclination angle ⁇ 1 it is necessary to reduce the inclination angle (inclination angle ⁇ 1), and regardless of the type of paper 100 (thick paper, thin paper), there is almost no common range of inclination angles that can solve both problems at once.
  • the basic arrangement position of the switching gate plate 63 is a first guide position 63a, and the inclination angle of the switching gate plate 63 at the first guide position 63a is determined by the type of paper 100 guided upward on the switching gate plate 63. is set at an angle that will not buckle even if the paper is thin ( ⁇ 1 in FIG. 10(a)).
  • the switching gate plate 63 may be temporarily switched from the first guide position 63a to the separation position 63b ( ⁇ 2 in FIG. 10(b)). This prevents the leading end 100' of the paper 100 from hitting the upper surface 871a of the upper roller, thereby preventing the occurrence of hitting noise.
  • the bag making machine 10 includes a control means for controlling the operation of the entire apparatus, and the control means includes a switching gate plate 63 disposed at a first guide position 63a, as shown in FIG. 11(a). guides the leading edge of the paper 100 being conveyed upward, and at least once separates the switching gate plate 63 before the leading edge 100' of the paper 100 hits the upper surface 871a of the upper roller 871. By arranging it at the position 63b, the leading edge 100' of the paper 100 is controlled to return to the first guide position 63a after avoiding hitting the upper surface 871a of the upper roller.
  • the leading edge of the paper 100 is guided to pass the upper surface of the upper roller 871 by a predetermined amount, and then the switching gate plate 63 to the second guide position (see FIG. 6), and then lower the folding plate 62, which is located at the retracted position, to the folding position in a substantially horizontal state so as to sandwich the paper 100 on the switching gate plate 63. control so that the leading end of the paper 100 is folded back along the surface of the upper roller 871.
  • the timing for returning the switching gate plate 63 from the separation position 63b to the first guide position 63a is determined by guiding the leading edge of the paper upward at the separation position 63b (63b in FIG. 11(a)). If it is assumed that the switching gate plate 63 is returned from the separation position 63b to the first guide position 63a during the process, the paper 100 returned to the first guide position 63a (dotted chain line in FIG. 11(b))
  • the position of the tip end 100' of is at least the position of the intersection 871a (inclination angle ⁇ 1) where the virtual extension line of the upper surface of the switching gate plate 63 (broken line in FIG. ) (for example, 871b in FIG. 11(b)).
  • the Western envelope 90 conveyed from the second folding section 6 to the pressing section 8 is successively sandwiched between the folding sections 105 and 106 between the upper mold 8a and the lower mold 8b of the pressing section 8. and is pressurized. Therefore, the folded portions 105 and 106 become strong.
  • the Western envelope 90 after being pressurized is conveyed toward the paper discharge section 7 by a pair of conveyance rollers 88 and is discharged onto the paper discharge tray 71 .
  • the paper folding device (second folding unit 6) in the present invention has been described as an embodiment in which it is employed as a paper folding mechanism in the bag making machine 10 that produces Western envelopes, but the paper folding device (second folding unit 6) that simply folds paper has been described. It can also be implemented as a paper folding device).

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  • Folding Of Thin Sheet-Like Materials, Special Discharging Devices, And Others (AREA)

Abstract

La présente invention vise à fournir un dispositif de pliage de papier qui peut être formé facilement et de manière abordable sans compliquer la structure, ne nécessite pas une entrée du type (épaisseur) du papier à l'avance par un opérateur, et a une bonne exploitabilité. En outre, la présente invention vise aussi à permettre d'empêcher la survenue de bruits de contact, quel que soit le type de papier. À cet effet, l'invention concerne une plaque de volet de commutation disposée à une première position de guidage, qui amène une extrémité de papier transporté à être guidée vers le haut, et amène la plaque de volet de commutation à être placée à une position de séparation au moins avant que l'extrémité du papier n'entre en contact avec la surface supérieure d'un rouleau supérieur.
PCT/JP2023/015999 2022-04-27 2023-04-21 Dispositif de pliage de papier WO2023210544A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP2022073553A JP2023162863A (ja) 2022-04-27 2022-04-27 紙折り装置
JP2022-073553 2022-04-27

Publications (1)

Publication Number Publication Date
WO2023210544A1 true WO2023210544A1 (fr) 2023-11-02

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PCT/JP2023/015999 WO2023210544A1 (fr) 2022-04-27 2023-04-21 Dispositif de pliage de papier

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JP (1) JP2023162863A (fr)
WO (1) WO2023210544A1 (fr)

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4985013A (en) * 1987-10-14 1991-01-15 Hadewe B.V. Method and an apparatus for folding paperlike material, such as documents, which may differ in quality and length and which are conveyed in assembled form or successively
US5090671A (en) * 1989-10-05 1992-02-25 Hadewe B.V. Method and device for folding sheets
US20040154487A1 (en) * 2002-12-20 2004-08-12 Iddon Robert Oliver Document folding apparatus
JP2021084730A (ja) * 2019-11-26 2021-06-03 デュプロ精工株式会社 紙折り装置

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4985013A (en) * 1987-10-14 1991-01-15 Hadewe B.V. Method and an apparatus for folding paperlike material, such as documents, which may differ in quality and length and which are conveyed in assembled form or successively
US5090671A (en) * 1989-10-05 1992-02-25 Hadewe B.V. Method and device for folding sheets
US20040154487A1 (en) * 2002-12-20 2004-08-12 Iddon Robert Oliver Document folding apparatus
JP2021084730A (ja) * 2019-11-26 2021-06-03 デュプロ精工株式会社 紙折り装置

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