JP2010180030A - Paper sheet folding mechanism and paper sheet folding device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a paper sheet folding mechanism and a paper sheet folding device capable of folding accurately a paper sheet along a fold, and capable of preventing a habitual curl from being generated in the paper sheet. <P>SOLUTION: The paper sheet folding mechanism or the like includes a first folding roller 51 and a second folding roller 52, a first feed roller 61 and a second feed roller 62, a feed roller moving mechanism 8, a projection member 71, a member moving mechanism 7, and a control part. Both the feed rollers 61, 62 are operated in a feed position P11, the projection member 71 is moved to a feed-in position P1 by the member moving mechanism 7, and the respective rollers 51, 61, 52, 62 are rotated to advance the fold of the paper sheet toward the first direction, in a feed-in operation. The both rollers 61, 62 are moved to an evacuation position P12 by the feed roller moving mechanism 8, the projection member 71 is moved to a guide position P2 or a stand-by position P3 by the member moving mechanism 7, and both the folding rollers 51, 52 are rotated to advance the fold of the paper sheet toward a first direction in a folding operation. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention relates to a sheet folding mechanism for folding a sheet while conveying the sheet, and a sheet folding apparatus including at least two such mechanisms.

  For example, mechanisms disclosed in Patent Documents 1 to 4 are known as mechanisms for folding a sheet while conveying the sheet. The mechanisms of Patent Documents 1 and 2 are so-called “buckle type”, and the mechanisms of Patent Documents 3 and 4 are so-called “knife type”.

Japanese Utility Model Publication No.58-180842 JP-A-5-201610 Japanese Utility Model Sho 63-65672 JP 2005-41658 A

When thick paper is folded by the “buckle method” as disclosed in Patent Documents 1 and 2, there are the following problems.
(1) When the paper is folded in the buckle, the conveying force by the feed roller is insufficient, and slipping easily occurs between the paper and the feed roller, and therefore the paper is damaged.
(2) Even if the sheet can be conveyed without slipping, the folding position is shifted.
(3) In the case of folding into a so-called “gate folding”, that is, in the form of an inner side opening, the inner edge of one folded piece of the paper is opposed to the conveying direction, so that it becomes difficult to convey. Folding becomes difficult.

  Further, when thick paper is folded by a “knife type” as disclosed in Patent Documents 3 and 4, there is a problem that the folding position is shifted.

  Furthermore, there is a demand for preventing the folded paper from having curl wrinkles.

  It is an object of the present invention to provide a paper folding mechanism and a paper folding device that can fold a paper accurately at the crease and further prevent the paper from being curled.

  A first invention of the present application is a sheet folding mechanism for folding a sheet while conveying the sheet, wherein the first folding roller and the second folding roller, the first feeding roller and the second feeding roller, A feed roller moving mechanism for moving the feed roller and the second feed roller, a protruding member, a member moving mechanism for moving the protruding member, and a control unit are provided, and the first folding roller and the second folding roller are provided. The roller is provided so as to sandwich the sheet with the crease at the head and pass in the first direction. The first feed roller sandwiches the sheet between the first folding roller and the first fold. The second feed roller is provided so as to be able to feed in a second direction orthogonal to the direction. The second feed roller sandwiches the sheet between the second folding roller and the second direction and the opposite direction. Sending in any one direction within The member moving mechanism is configured to move the protruding member between the feeding position, the guide position, and the standby position, and the feeding position is determined by the protruding member. The position at which the fold line is fed between the first folding roller and the second folding roller, and the guide position is a position at which the protruding member guides the paper between the first folding roller and the second folding roller. The standby position is a position where the protruding member does not contact the paper, and the feed roller moving mechanism moves the first feed roller and the second feed roller between the feed position and the retracted position. The feed position is a position at which the first feed roller sandwiches the paper between the first folding roller and the second feed roller between the paper and the second folding roller. The position between The retreat position is a position where the first feeding roller separates a gap larger than the thickness of the paper from the first folding roller, and the second feeding roller is a gap larger than the thickness of the paper from the second folding roller. The control unit operates the first feeding roller and the second feeding roller at the feeding position, moves the protruding member to the feeding position, and moves each of the rollers to the feeding position. Are rotated so that the crease of the paper advances in the first direction, and during the folding operation, the first feeding roller and the second feeding roller are moved to the retracted position, and the protruding member is moved. The first fold roller and the second fold roller are moved to the guide position or the standby position, and are rotated so that the fold of the paper advances in the first direction. The

  According to a second invention of the present application, in a sheet folding mechanism for folding a sheet while conveying the sheet, a first folding roller, a second folding roller, a first feeding roller, a second feeding roller, and a protruding member And an integral moving mechanism that moves the first feed roller, the second feed roller, and the protruding member integrally, and a control unit. The first folding roller and the second folding roller The fold line is sandwiched between the first folding roller and the first feeding roller. The first feeding roller is perpendicular to the first direction with the sheet sandwiched between the first folding roller. The second feed roller is provided so as to be fed in the second direction, and the second feed roller can sandwich the paper between the second folding rollers and feed the paper in the direction opposite to the second direction. The integral movement mechanism is The first feed roller, the second feed roller, and the ejecting member are configured to move between the first position, the second position, and the third position. A position where the fold is fed between the first folding roller and the second folding roller, and the first feeding roller is a position where the sheet is sandwiched between the first folding roller and the first folding roller. The two-feed roller is a position where the paper is sandwiched between the second folding roller, and the second position is a position where the protruding member guides the paper between the first folding roller and the second folding roller. And the first feed roller is spaced from the first folding roller by a gap larger than the sheet thickness, and the second feed roller is spaced from the second folding roller by a gap larger than the sheet thickness. The third position is the protruding part. Is a position where the sheet does not contact the sheet, and the first feed roller separates the gap larger than the gap from the first folding roller, and the second feed roller is the second folding roller. From the above, the control unit moves the first feed roller, the second feed roller, and the protruding member to the first position during the feeding operation, and Each roller is rotated so that the crease of the paper advances in the first direction. In the folding operation, the first feed roller, the second feed roller, and the protruding member are moved to the second position or The first fold roller and the second fold roller are moved to the third position and rotated so that the fold of the paper advances in the first direction.

The first and second inventions preferably employ the following configuration (A).
(A) The protruding member inclines in a direction opposite to the first direction on both sides of the pointed end portion for allowing the fold of the sheet to enter between the first folding roller and the second folding roller. And a curved surface portion.

  The third invention of the present application is a paper folding device provided with at least two paper folding mechanisms of the first invention or the second invention, arranged side by side so that the paper can be folded continuously. An upper device section having an upper sheet folding mechanism is provided so as to be openable and closable with respect to a lower apparatus section having a lower sheet folding mechanism. It is provided so as to be exposed when it is opened with respect to the lower device portion. The upper device portion is constantly biased upward from the lower device portion, and the upper device portion is exposed from the lower device portion. It is characterized by being hooked by the extended fastener and being closed with respect to the lower device part.

According to the paper folding mechanism of the first invention, the following effects can be exhibited.
(1) In the feeding operation, the paper is sandwiched between the first folding roller and the first feeding roller, and further sandwiched between the second folding roller and the second feeding roller. Can be sent to any position. Therefore, the first fold can be accurately set at the position of the protruding member.

(2) In the feeding operation, the protruding member moves to the feeding position along with the crease, and each roller rotates so that the crease advances in the first direction. In addition, the sheet can be fed between the first folding roller and the second folding roller. Therefore, the sheet can be accurately folded at the crease.

(3) In the folding operation, since the first feeding roller and the second feeding roller move to the retracted position, the downstream portion in the sheet conveyance direction is not sandwiched between the first folding roller and the first feeding roller. It is not sandwiched between the second folding roller and the second feed roller. Therefore, it is possible to prevent the sheet from being curled during the folding operation.

According to the paper folding mechanism of the second invention, the following effects can be exhibited.
(1) In the feeding operation, the protruding member moves to the first position along with the fold, and the first feeding roller and the second feeding roller move to the first position, and the first folding roller and the second folding roller are moved to the first position. Since the fold is rotated so as to advance in the first direction together with the folding roller, the fold of the paper is surely and smoothly fed between the first folding roller and the second folding roller. Can do. Therefore, the sheet can be accurately folded at the crease.

(2) In the folding operation, the first feeding roller and the second feeding roller move to the second position or the third position, and therefore, the portion on the downstream side in the sheet transport direction is divided into the first folding roller and the first feeding roller. It is not sandwiched between the second folding roller and the second feed roller. Therefore, it is possible to prevent the sheet from being curled during the folding operation.

  According to the configuration (A), in the feeding operation and the folding operation, by setting the protruding member to the guide position or the second position, the inner edge of the folded piece of paper can be smoothly conveyed along the curved surface portion. . Therefore, the feeding operation and the folding operation can be executed smoothly.

According to the paper folding device of the present invention, the following effects can be exhibited.
(1) Since at least two sheet folding mechanisms are provided, folding can be reliably executed at least at two folds.

(2) In the folding operation, the first feed roller and the second feed roller move to the retracted position, the second position, or the third position, so that it is possible to prevent the sheet from being curled.

(3) When a jam occurs in one of the upper and lower sheet folding mechanisms, the upper device can be opened with respect to the lower device, and both mechanisms can be exposed, so that the jam can be easily eliminated.

(4) Although the upper device portion can be opened and closed with respect to the lower device portion, the upper device portion is always biased upward from the lower device portion, so that the height of the tip of the fastener is always maintained. In position, it is closed against the lower device part. Therefore, the height position of the upper paper folding mechanism relative to the lower paper folding mechanism can always be maintained at a constant value accurately. Therefore, the folding process at the fold line in the upper sheet folding mechanism can be executed accurately.

It is an external appearance perspective view of the paper folding apparatus of the 1st invention and the 2nd invention. It is an external appearance perspective view from the opposite side of the apparatus of FIG. It is the center longitudinal cross-section schematic of FIG. It is a side view which shows the state which the upper apparatus part closed with respect to the lower apparatus part. It is a side view which shows the state which the upper apparatus part opened with respect to the lower apparatus part. It is an enlarged front view of the 1st paper folding mechanism of 1st invention. It is an enlarged front view of the upper part of the first paper folding mechanism. It is a figure of the state at the time of conveyance operation of the 1st paper folding mechanism. It is a figure of the state at the time of feeding operation of the 1st paper folding mechanism. It is a figure of the state at the time of folding operation | movement of a 1st paper folding mechanism. It is a perspective view for demonstrating a "gate folding" form. FIG. 6 is an enlarged longitudinal sectional view showing a conveying operation of a first paper folding mechanism. FIG. 6 is an enlarged vertical sectional view showing a feeding operation of a first paper folding mechanism. It is an enlarged vertical sectional view showing a folding operation of the first paper folding mechanism. FIG. 6 is an enlarged vertical cross-sectional view illustrating a transport operation of a second paper folding mechanism. It is an enlarged vertical sectional view showing the feeding operation of the second paper folding mechanism. It is an enlarged vertical sectional view showing a folding operation of the second paper folding mechanism. It is a schematic diagram which shows the operation | movement outline | summary of FIGS. FIG. 19 is a view corresponding to FIG. 18, illustrating an outline of the operation of folding in the “Z-fold” form. FIG. 19 is a view corresponding to FIG. 18, showing an outline of the operation of folding in the “C-fold” form. It is a figure equivalent to FIG. 18 which shows the operation | movement outline | summary of the folding process of a "V fold" form. It is a figure equivalent to FIG. 18 which shows the operation | movement outline | summary of the folding process of a "V fold" form. It is an enlarged front view of the 1st paper folding mechanism of 2nd invention. It is a figure of the state at the time of conveyance operation of the 1st paper folding mechanism. It is a figure of the state at the time of feeding operation of the 1st paper folding mechanism. It is a figure of the state at the time of folding operation | movement of a 1st paper folding mechanism. FIG. 6 is an enlarged longitudinal sectional view showing a conveying operation of a first paper folding mechanism. FIG. 6 is an enlarged vertical sectional view showing a feeding operation of a first paper folding mechanism. It is an enlarged vertical sectional view showing a folding operation of the first paper folding mechanism. FIG. 6 is an enlarged vertical cross-sectional view illustrating a transport operation of a second paper folding mechanism. It is an enlarged vertical sectional view showing the feeding operation of the second paper folding mechanism. It is an enlarged vertical sectional view showing a folding operation of the second paper folding mechanism.

(I) First Embodiment An embodiment of a paper folding mechanism of the first invention and a paper folding device provided with the paper folding mechanism will be described.

[Overall configuration of the device]
FIG. 1 is an external perspective view of the sheet folding apparatus of the present invention. 2 is an external perspective view from the opposite side of the apparatus of FIG. The sheet folding device 1 includes a lower device unit 10 and an upper device unit 20. A part of the transport path Tc protrudes vertically from the upper device unit 20.

  FIG. 3 is a schematic diagram of the central longitudinal section of FIG. The lower apparatus unit 10 includes a paper inlet 11, a horizontal conveyance path Ta, and a first paper folding mechanism 12. The upper device unit 20 includes a second paper folding mechanism 22, a vertical conveyance path Tc, a horizontal conveyance path Td, and a decurling mechanism 23.

  As shown in FIGS. 4 and 5, the upper device unit 20 can be opened and closed with respect to the lower device unit 10. In the state shown in FIG. 4, that is, in the state where the upper device unit 20 is closed with respect to the lower device unit 10, the second paper folding mechanism 22 is positioned directly above the first paper folding mechanism 12 and the mechanism 12. The distance D1 between the mechanism 22 and the mechanism 22 is maintained at a predetermined value. Further, in the state of FIG. 5, that is, in a state where the upper device unit 20 is opened with respect to the lower device unit 10, the mechanism 12 is exposed when viewed from above, and the mechanism 22 is exposed when viewed from below. Yes.

  The upper device unit 20 is provided so as to be rotatable in the arrow R direction around the horizontal axis with respect to the upper end of the vertical plate 19 of the lower device unit 10. The vertical plate 19 is provided at an upstream end of the lower device unit 10. The upper device unit 20 is constantly urged upward by the cylinder mechanism 30 from the lower device unit 10. In the cylinder mechanism 30, the lower end of the cylinder 31 is fixed to the lower device 10 so as to be rotatable, and the tip of the rod 32 is fixed to the upper device 20 so as to be rotatable. In addition, one end 41 of the fastener 40 is rotatably fixed to the lower device portion 10, and the tip 42 of the fastener 40 can be hooked on the pin 43 of the upper device portion 20 from above. Yes. Therefore, the upper device part 20 is always closed with respect to the lower device part 10 at the height position H1 of the tip 42 of the fastener 40.

[Paper folding mechanism]
6 is an enlarged front view of the first paper folding mechanism 12 of FIG. FIG. 7 is an enlarged front view of the upper portion of the mechanism 12. 8 to 10 each show an operating state of the mechanism 12. 8 shows a state when the paper 100 is transported, FIG. 9 shows a state when the paper 100 is fed, and FIG. 10 shows a state when the paper 100 is folded. In each figure, (A) is a side view, (B) is a front view, and (C) is a rear view.

  The first paper folding mechanism 12 includes a first folding roller 51 and a second folding roller 52, a first feeding roller 61 and a second feeding roller 62, a feeding roller moving mechanism 8, and a protruding member (also called a knife) 71. The member moving mechanism 7 and a control unit (not shown) are provided.

  The first folding roller 51 and the second folding roller 52 are arranged so as to face each other in the horizontal direction and have a gap D2 (FIG. 7). That is, the first folding roller 51 and the second folding roller 52 are provided so as to pass the paper in the first direction (in the direction of the arrow X1) with the sheet being sandwiched at the top. The first folding roller 51 is located on the upstream side in the transport direction (arrow Y1 direction). The second folding roller 52 is urged toward the first folding roller 51 by a spring (not shown). The gap D2 is set to 0.1 to 0.2 mm. This is because the thinnest coated paper, 110 gsm, has a thickness of 0.11 mm, has a thickness of 0.22 mm after being folded, and has a folded portion of about 0.3 mm. It is because it has thickness.

  The first feed roller 61 is provided so as to be able to feed a sheet in the second direction (arrow Y1 direction) orthogonal to the first direction while being sandwiched between the first folding roller 51. .

  The second feed roller 62 is provided so that the paper can be fed between the second folding roller 52 and any one of the second direction and the opposite direction (arrow Y2 direction). It has been.

  The protruding member 71 is disposed between the first feed roller 61 and the second feed roller 62 and can be moved between the first folding roller 51 and the second folding roller 52 by the member moving mechanism 7. Is provided. Further, as shown in FIG. 7, the protruding member 71 includes a pointed end portion 711 for allowing the fold line F of the paper 100 to enter between the first folding roller 51 and the second folding roller 52, and both sides of the pointed end portion 711. , Curved surface portions 712 and 713 are formed so as to be inclined in a direction opposite to the first direction.

  The member moving mechanism 7 is configured to move the protruding member 71 among the feeding position P1, the guide position P2, and the standby position P3. In addition, positions P1, P2, and P3 in the drawing are positions of the pointed ends 711 of the protruding member 71. As shown in FIG. 9, the feeding position P <b> 1 is a position where the projecting member 71 projects the fold line F of the paper 100 in the first direction and feeds it between the first folding roller 51 and the second folding roller 52. It is. The guide position P <b> 2 is a position where the protruding member 71 guides the paper 100 between the first folding roller 51 and the second folding roller 52. The standby position P3 is a position where the protruding member 71 does not contact the paper 100 as shown in FIG. 6 or FIG.

  Specifically, as shown in FIG. 6, the member moving mechanism 7 includes teeth 79 formed on the protruding member 71 side by side in the moving direction (arrow X1 direction), a gear 78 meshed with the teeth 79, and a gear. And a motor 77 that rotates 78, and the motor 77 rotates the gear 78 in the R1 direction so that the protruding member 71 is directed between the first folding roller 51 and the second folding roller 52. The protrusion member 71 is moved backward by moving forward and rotating the gear 78 in the R2 direction by the motor 77.

  The feed roller moving mechanism 8 is configured to move the first feed roller 61 and the second feed roller 62 between the feed position P11 and the retracted position P12. In addition, the positions P11 and P12 in the figure are the positions of the upper ends of both rollers 61 and 62. The feed position P11 is a position where the first feed roller 61 sandwiches the paper 100 between the first folding roller 51, and the second feed roller 62 feeds the paper 100 to the second folding roller 52. It is a position to be sandwiched between. The retreat position P12 is a position where the first feeding roller 61 separates a gap larger than the thickness of the paper 100 from the first folding roller 51, and the second feeding roller 62 is separated from the second folding roller 52. This is the position where a gap larger than the thickness of the paper is separated.

  Specifically, the feed roller moving mechanism 8 includes a support arm 81 that integrally supports the first feed roller 61 and the second feed roller 62, an eccentric cam 82 that contacts the support arm 81 from below, and a belt 83. And a motor 84 for rotating the eccentric cam 82. The support arm 81 is provided on the front side (FIG. 8 to FIG. 10B) and the back side (FIG. 8 to FIG. 10C) of both rollers 61 and 62. It can move up and down along the longitudinal holes 612 and 622 in a state where both ends of the rotation shafts 611 and 621 of the 61 and 62 are supported. Further, two eccentric cams 82 are provided in the same form on the front side and the back side. The eccentric cam 82 has a proximal point 821 with the shortest radius and a distal point 822 with the longest radius. The eccentric cams 82 are disposed on both sides of the protruding member 71 on the front side and the back side. The belt 83 and the motor 84 are disposed on the front side. The motor 84 rotates the rotation shaft 820 of the eccentric cam 82 via the belt 83. Then, the feed roller moving mechanism 8 moves the support arm 81 by rotating the eccentric cam 82 by the motor 84 so that the uppermost point of the eccentric cam 82 becomes the distal point 822, and both rollers 61, 62 is moved to the feed position P11, and the support arm 81 is moved by rotating the eccentric cam 82 by the motor 84 so that the uppermost point of the eccentric cam 82 becomes the proximal point 821. 61 and 62 are moved to the retracted position P12.

  As shown in FIG. 9, the control unit operates the first feeding roller 61 and the second feeding roller 62 at the feeding position P11 and moves the protruding member 71 to the feeding position P1 during the feeding operation. The rollers 51, 52, 61, and 62 are rotated so that the fold line F of the paper 100 advances in the first direction. As shown in FIG. In addition, the first feed roller 61 and the second feed roller 62 are moved to the retracted position P12, the protruding member 71 is moved to the guide position P2 (not shown) or the standby position P3, and the first folding roller 51 is moved. The second folding roller 52 is rotated so that the fold F of the paper 100 advances in the first direction.

  The second paper folding mechanism 22 has the same configuration as the first paper folding mechanism 12. However, in the second paper folding mechanism 22, the first folding roller 51 and the second folding roller 52 are opposed to each other in the vertical direction, and the first feeding roller 61 is lateral to the first folding roller 51. The second feed roller 62 is in pressure contact with the second folding roller 52 from the lateral direction.

[Operation]
Next, the folding operation in the apparatus 1 will be described.

  Here, a case where “gate folding” is performed will be described. As shown in FIG. 11, “gate folding” is to fold the paper 100 shown in (A) to one side at two folds F <b> 1 and F <b> 2 to a state shown in (B). . When the length dimension in the transport direction of the sheet 100 is L, the first fold F1 is formed at a position L / 4 upstream in the transport direction (arrow Y1 direction), and the second fold F2 is in the transport direction. It is formed at a position of L / 4 on the downstream side. The “gate-folded” sheet 100 has two folding pieces 101 and 102 that are opened inward.

  First, the sheet 100 inserted into the inlet 11 is conveyed to the first sheet folding mechanism 12 through the conveyance path Ta. At this time, in the mechanism 12, the protruding member 71 is at the standby position P3, and the first feed roller 61 and the second feed roller 62 are at the feed position P11.

(Operation of the first paper folding mechanism 12)
(1) Feeding operation As shown in FIGS. 8 and 12, the sheet 100 conveyed to the mechanism 12 is sandwiched between the first folding roller 51 and the first feeding roller 61, and further, the second folding is performed. It is sandwiched between the roller 52 and the second feed roller 62 and fed in the direction of the arrow Y1. At this time, the first folding roller 51 rotates in the Ra direction, the first feeding roller 61 rotates in the Rb direction, the second folding roller 52 rotates in the Ra direction, and the second feeding roller 62 rotates in the Rb direction. . When the first fold line F1 of the paper 100 comes to the position of the protruding member 71, the rollers 51, 61, 52, 62 are stopped.

(2) Feeding operation Next, as shown in FIGS. 9 and 13, the member moving mechanism 7 is operated, and the protruding member 71 moves to the feeding position P1 with the first fold F1. At this time, the first folding roller 51 rotates in the Ra direction, the first feed roller 61 rotates in the Rb direction, the second folding roller 52 rotates in the Rb direction, and the second feed roller 62 rotates in the Ra direction. Rotate. That is, the rollers 51, 61, 52, and 62 rotate so that the first fold line F1 advances in the arrow X1 direction. As a result, the sheet 100 is sandwiched between the first folding roller 51 and the second folding roller 52 with the first fold F1 as the head.

(3) Folding operation Next, as shown in FIGS. 10 and 14, the member moving mechanism 7 is operated, the protruding member 71 is moved back to the standby position P3, and the feed roller moving mechanism 8 is operated. The first feed roller 61 and the second feed roller 62 move to the retracted position P12. Further, the first folding roller 51 and the second folding roller 52 rotate so that the first fold F1 advances in the direction of the arrow X1, whereby the sheet 100 starts with the first fold F1 as the first folding roller. 51 is sandwiched between the second folding roller 52 and sent in the direction of the arrow X1.

  Then, the paper 100 is transported to the second paper folding mechanism 22 through the transport path Tb. At this time, in the mechanism 22, the protruding member 71 is at the standby position P3, and the first feed roller 61 and the second feed roller 62 are at the feed position P11.

  When the diameters of both rollers 51 and 52 are 40 mm, the distance from the nip position P (FIG. 12) of both rollers 51 and 52 to the pointed end 711 of the protruding member 71 is 4 mm in the case of the feeding position P1. The guide position P2 is set to 6 mm, and the standby position P3 is set to 24 mm.

(Operation of the second paper folding mechanism 22)
(1) Feeding operation As shown in FIG. 15, the sheet 100 conveyed to the mechanism 22 is sandwiched between the first folding roller 51 and the first feeding roller 61 with the first fold F1 as the head, Further, the sheet is sandwiched between the second folding roller 52 and the second feed roller 62 and is fed in the direction of the arrow Y1. At this time, the rotation directions of the rollers 51, 61, 52, 62 are the same as those of the first paper folding mechanism 12. The arrow Y1 direction in the second paper folding mechanism 22 is an extension direction of the first paper folding mechanism 12 in the arrow X1 direction. Then, the rotation of the rollers 51, 61, 52, 62 stops when the second fold F 2 of the paper 100 comes to the position of the protruding member 71.

(2) Feeding operation Next, as shown in FIG. 16, the member moving mechanism 7 is actuated, and the protruding member 71 moves to the feeding position P1 with the second fold F2. At this time, the first folding roller 51 rotates in the Ra direction, the first feed roller 61 rotates in the Rb direction, the second folding roller 52 rotates in the Rb direction, and the second feed roller 62 rotates in the Ra direction. Rotate. That is, the rollers 51, 61, 52, 62 rotate so that the second fold line F2 advances in the direction of the arrow X1. As a result, the sheet 100 is sandwiched between the first folding roller 51 and the second folding roller 52 with the second fold F2 as the head.

(3) Folding operation Next, as shown in FIG. 17, the member moving mechanism 7 is operated, the protruding member 71 is retracted to the guide position P2, and the feed roller moving mechanism 8 is operated to The feed roller 61 and the second feed roller 62 move to the retracted position P12. Further, the first folding roller 51 and the second folding roller 52 rotate so that the second fold line F2 advances in the direction of the arrow X1, whereby the sheet 100 starts with the second fold line F2 as the first folding roller. 51 and the second folding roller 52 are fed in the direction of the arrow X1.

  Then, the paper 100 is conveyed to the decurling mechanism 23.

(Overview of operation)
FIG. 18 schematically shows the above-described operation. That is, in the first paper folding mechanism 12, as shown in (A), the protruding member 71 operates with respect to the first fold F1, and in the second paper folding mechanism 22, as shown in (B), The protruding member 71 is actuated with respect to the second fold F2, and as a result, as shown in (C), the paper 100 that has been “gate-folded” is obtained.

[effect]
According to the first sheet folding mechanism 12 configured as described above, the following effects can be exhibited.
(1) In the feeding operation, the sheet 100 is sandwiched between the first folding roller 51 and the first feeding roller 61, and further sandwiched between the second folding roller 52 and the second feeding roller 62 and fed. Therefore, the paper 100 can be sent to an accurate position. Therefore, the first fold line F1 can be accurately set at the position of the protruding member 71.

(2) In the feeding operation, the protruding member 71 moves to the feeding position P1 along with the first fold line F1, and the rollers 51, 61, 52, and 62 move the first fold line F1 in the direction of the arrow X1. Since it rotates, the first fold F1 of the paper 100 can be reliably and smoothly fed between the first fold roller 51 and the second fold roller 52. Accordingly, the paper 100 can be accurately folded at the first fold F1.

(3) In the folding operation, the first feed roller 61 and the second feed roller 62 move to the retracted position P12. Therefore, as shown in FIG. 14, during the folding operation, the portion 100A on the upstream side in the transport direction of the paper 100 is not sandwiched between the first folding roller 51 and the first feed roller 61, and is also downstream in the transport direction of the paper 100. The side portion 100 </ b> B is also not sandwiched between the second folding roller 52 and the second feed roller 62. Therefore, it is possible to prevent the paper 100 from being curled during the folding operation.

In addition, according to the second sheet folding mechanism 22 configured as described above, the following effects can be exhibited.
(1) In the feeding operation, the sheet 100 is sandwiched between the first folding roller 51 and the first feeding roller 61, and further sandwiched between the second folding roller 52 and the second feeding roller 62 and fed. Therefore, the paper 100 can be sent to an accurate position. Therefore, the second fold line F <b> 2 can be accurately set at the position of the protruding member 71.

(2) In the feeding operation, the protruding member 71 moves to the feeding position P1 with the second fold F2, and each of the rollers 51, 61, 52, 62 moves the second fold F2 in the direction of the arrow X1. Since it rotates, the second fold F2 of the paper 100 can be reliably and smoothly fed between the first fold roller 51 and the second fold roller 52. Accordingly, the paper 100 can be accurately folded at the second fold line F2.

(3) In the folding operation, the first feed roller 61 and the second feed roller 62 move to the retracted position P12. Therefore, as shown in FIG. 17, during the folding operation, the portion 100 </ b> C on the upstream side in the transport direction of the paper 100 is not sandwiched between the first folding roller 51 and the first feed roller 61 and is downstream in the transport direction of the paper 100. The side portion 100 </ b> D is also not sandwiched between the second folding roller 52 and the second feed roller 62. Therefore, it is possible to prevent the paper 100 after the folding operation from being curled.

(4) In the folding operation, since the protruding member 71 is at the guide position P2, the inner edge 111 of the folded piece 101 of the paper 100 is moved along the curved surface portion 712 of the protruding member 71 as shown in FIG. It can be sent smoothly in the direction. Therefore, the folding process can be executed smoothly also from this point.

Moreover, according to the paper folding apparatus 1 having the above-described configuration, the following effects can be exhibited.
(1) Since the two sheet folding mechanisms 12 and 22 are provided, the folding process can be surely executed at the first fold F1 and the second fold F2.

(2) Since the protruding member 71 has the curved surface portions 712 and 713, the folded piece formed earlier can be smoothly fed by being along the curved surface portion in the subsequent folding process.

(3) In the folding operation, the first feed roller 61 and the second feed roller 62 move to the retracted position P12, so that it is possible to prevent the sheet 100 from being curled.

(4) When a jam occurs in one of the two sheet folding mechanisms 12 and 22, the upper device unit 20 can be opened with respect to the lower device unit 10 to expose both mechanisms 12 and 22. Can easily remove jams.

(5) Although the upper device unit 20 can be opened and closed with respect to the lower device unit 10, the upper device unit 20 is constantly urged upward from the lower device unit 10 by the cylinder mechanism 30. It is always closed with respect to the lower device part 10 at the height position of the tip 42 of the fastener 40. Therefore, the height position of the second paper folding mechanism 22 with respect to the first paper folding mechanism 12 can always be maintained accurately at a constant value D1. Therefore, the folding process at the second fold line F2 in the second sheet folding mechanism 22 can be executed accurately.

In addition, according to the paper folding apparatus 1 having the above-described configuration, the following folding process can be performed.
(1) FIG. 19 shows a folding process in the “Z-fold” form. In this case, the first fold F1 is set at the L / 3 position on the downstream side in the transport direction, and the second fold F2 is set at the L / 3 position on the upstream side in the transport direction.

(2) FIG. 20 shows a folding process in the “C-folding” form. In this case, the first fold line F1 is set at a position of approximately L / 3 on the upstream side in the transport direction, and the second fold line F2 is set at a position of approximately L / 3 on the downstream side in the transport direction.

(3) FIG. 21 shows the folding process in the “V-folding” form. In this case, the first fold line F1 is set at a position L / 2 in the transport direction, and the second fold line F2 is not set. Therefore, in this case, in the operation of the second paper folding mechanism 22, the protruding member 71 is set to the “guide position”.

(4) FIG. 22 also shows a “V-fold” type folding process. In this case, the first fold F1 is not set, and the second fold F2 is set at a position L / 2 in the transport direction. Therefore, in this case, in the operation of the first paper folding mechanism 12, the protruding member 71 is set to the guide position.

  Further, in the sheet folding device 1 having the above-described configuration, the position of the protruding member 71 during the folding operation of the first sheet folding mechanism 12 may be the standby position P3 except in the case of the “V-folding” process of FIG. The position of the protruding member 71 during the folding operation of the second paper folding mechanism 22 is the “C-folding” process of FIG. 20, the “V-folding” process of FIG. 21, and the “gate folding” process of FIGS. In other cases, the standby position P3 may be used.

  Further, in the first sheet folding mechanism 12 having the above-described configuration, the long holes 612 and 622 may be provided obliquely with respect to the vertical direction. In this case, the both feed rollers 61 and 62 move obliquely with respect to the vertical direction. According to this configuration, the vertical dimension of the first paper folding mechanism 12 can be reduced. The same applies to the second paper folding mechanism 22 configured as described above.

(II) Second Embodiment An embodiment of a paper folding mechanism of the second invention and a paper folding device provided with the paper folding mechanism will be described.

[Overall configuration of the device]
The overall configuration of the sheet folding apparatus of the present invention is the same as that of the apparatus 1 of the first invention shown in FIGS.

[Paper folding mechanism]
FIG. 23 is an enlarged front view of the first paper folding mechanism 12 of the apparatus 1 of the present invention. 24 to 26 each show an operating state of the mechanism 12. 24 shows a state when the paper 100 is transported, FIG. 25 shows a state when the paper 100 is fed, and FIG. 26 shows a state when the paper 100 is folded. In each figure, (A) is a side view, (B) is a front view, and (C) is a rear view.

  The first paper folding mechanism 12 includes a first folding roller 51 and a second folding roller 52, a first feeding roller 61 and a second feeding roller 62, a protruding member (also referred to as a knife) 71, an integral moving mechanism 9, And a control unit (not shown). That is, the first paper folding mechanism 12 of the present invention includes an integral moving mechanism 9 instead of the member moving mechanism 7 and the feed roller moving mechanism 8 as compared with the first paper folding mechanism 12 of the first invention. And the configuration of the control unit are different, and the other configurations are the same.

  The integral moving mechanism 9 is configured to move the first feed roller 61, the second feed roller 62, and the protruding member 71 between the first position, the second position, and the third position. The first position is a position P21 where the protruding member 71 feeds the fold line F of the paper 100 between the first folding roller 51 and the second folding roller 52, and the first feeding roller 61 is the paper 100. Is the position P31 that sandwiches the sheet 100 with the first folding roller 51, and the position P31 that the second feed roller 62 sandwiches the sheet 100 with the second folding roller 52. The second position is a position P22 where the protruding member 71 guides the paper 100 between the first folding roller 51 and the second folding roller 52, and the first feed roller 61 is the first folding roller 51. Therefore, the position P32 is a position P32 where the gap B1 larger than the thickness of the paper 100 is separated, and the second feeding roller 62 is the position P32 where the gap B1 larger than the thickness of the paper is separated from the second folding roller 52. The third position is a position P23 where the protruding member 71 does not contact the paper 100, and the first feed roller 61 separates the gap B2 larger than the gap B1 from the first folding roller 51 at a position P33. In addition, the second feed roller 62 is located at a position P33 where the second folding roller 52 separates the gap B2 larger than the gap B1. In the figure, positions P21, P22, and P23 are the positions of the pointed ends 711 of the protruding member 71, and positions P31, P32, and P33 are the positions of the upper ends of the rollers 61 and 62.

  Specifically, the integral moving mechanism 9 includes a support arm 91 that integrally supports the first feed roller 61, the second feed roller 62, and the protruding member 71, and an eccentric cam 92 that abuts the support arm 91 from below. And a motor 94 that rotates an eccentric cam 92 via a belt 93. The support arm 91 is provided on the front side (FIG. 24 to FIG. 26B) and the back side (FIG. 24 to FIG. 26C) of both rollers 61 and 62. It is possible to move up and down along the elongated holes 612 and 622 in the vertical direction while supporting both ends of the rotating shafts 611 and 621 of 61 and 62 and supporting the base end portion 710 of the protruding member 71. . The protruding member 71 is movable along the longitudinal slot 714 (FIG. 23). Two eccentric cams 92 are provided in the same form on the front side and the back side. The eccentric cam 92 includes a proximal point 921 with the shortest radius, a distal point 922 with the longest radius, and a middle point 923 that is slightly closer to the proximal point 921 than the middle between the proximal point 921 and the distal point 922. Have. The eccentric cams 92 are disposed on both sides of the protruding member 71 on the front side and the back side. The belt 93 and the motor 94 are disposed on the front side. Then, the integral moving mechanism 9 moves the support arm 91 by rotating the eccentric cam 92 by the motor 94 so that the uppermost point of the eccentric cam 92 becomes the distal point 922, and both rollers 61, 62 are moved. And the protruding member 71 is moved to the first position, and the support arm 91 is moved halfway by rotating the eccentric cam 92 by the motor 94 so that the uppermost point of the eccentric cam 92 becomes the intermediate point 923. Then, both the rollers 61 and 62 and the protruding member 71 are moved to the second position, and the eccentric cam 92 is rotated by the motor 94 so that the uppermost point of the eccentric cam 92 becomes the proximal point 921. 91 is moved, and both rollers 61 and 62 and the protrusion member 71 are moved to the third position.

  During the feeding operation, the control unit moves the first feeding roller 61, the second feeding roller 62, and the protruding member 71 to the first position as shown in FIG. 52, 61, 62 are rotated so that the fold line F of the paper 100 advances in the first direction, and during the folding operation, as shown in FIG. The second feed roller 62 and the protruding member 7 are moved to the second position (not shown) or the third position, and the first folding roller 51 and the second folding roller 52 are moved to the first fold F of the paper 100. It is rotated so as to advance in one direction.

  The second paper folding mechanism 22 has the same configuration as the first paper folding mechanism 12. However, in the second paper folding mechanism 22, the first folding roller 51 and the second folding roller 52 face each other in the vertical direction, and the first feeding roller 61 is laterally located with respect to the first folding roller 51. The second feed roller 62 is in pressure contact with the second folding roller 52 from the lateral direction.

[Operation]
Next, the folding operation in the apparatus 1 will be described.

  Here, the case where the “gate folding” shown in FIGS. 11 and 18 is performed will be described.

  First, the sheet 100 inserted into the inlet 11 is conveyed to the first sheet folding mechanism 12 through the conveyance path Ta. At this time, in the mechanism 12, the first feed roller 61, the second feed roller 62, and the protruding member 71 are in the third position.

(Operation of the first paper folding mechanism 12)
(1) Feeding operation As shown in FIGS. 24 and 27, the sheet 100 conveyed to the mechanism 12 is fed in the direction of the arrow Y <b> 1 by the first folding roller 51 and the second folding roller 52. At this time, the first folding roller 51 and the second folding roller 52 rotate in the Ra direction. When the first fold line F1 of the paper 100 comes to the position of the protruding member 71, the rollers 51 and 52 are stopped. Note that the conveyance of the paper 100 to the mechanism 12 is performed by at least a conveyance roller (FIG. 3) provided on the upstream side of the mechanism 12.

(2) Feeding Operation Next, as shown in FIGS. 25 and 28, the integral moving mechanism 9 is operated, and the first feeding roller 61, the second feeding roller 62, and the protruding member 71 are moved to the first position. Moving. That is, the protruding member 71 moves to the position P21 with the first fold F1, and both the feed rollers 61 and 62 move to the position P31 and together with the first folding roller 51 and the second folding roller 52, Although it is instantaneous, the first fold F1 rotates so as to advance in the first direction. At this time, the first folding roller 51 rotates in the Ra direction, the first feeding roller 61 rotates in the Rb direction, the second folding roller 52 rotates in the Rb direction, and the second feeding roller 62 rotates in the Ra direction. . That is, the rollers 51, 61, 52, and 62 rotate so that the first fold line F1 advances in the arrow X1 direction. As a result, the sheet 100 is sandwiched between the first folding roller 51 and the second folding roller 52 with the first fold F1 as the head.

(3) Folding operation Next, as shown in FIGS. 26 and 29, the integral moving mechanism 9 is operated, and the first feeding roller 61, the second feeding roller 62, and the protruding member 71 are moved to the third position. Moving. That is, the protruding member 71 moves to the position P23, and the both feed rollers 61 and 62 move to the position P33. At this time, the first fold roller 51 and the second fold roller 52 rotate so that the first fold line F1 advances in the direction of the arrow X1, so that the sheet 100 starts with the first fold line F1 as the first. It is sandwiched between the first folding roller 51 and the second folding roller 52 and is fed in the direction of the arrow X1.

  Then, the paper 100 is transported to the second paper folding mechanism 22 through the transport path Tb. At this time, in the mechanism 22, the first feed roller 61, the second feed roller 62, and the protruding member 71 are in the “third position”.

  When the diameters of both rollers 51 and 52 are 40 mm, the distance from the nip position P (FIG. 27) of both rollers 51 and 52 to the pointed end 711 of the protruding member 71 is 4 mm in the case of position P21. The position P22 is set to 6 mm, and the position P23 is set to 24 mm.

(Operation of the second paper folding mechanism 22)
(1) Feeding operation As shown in FIG. 30, the sheet 100 conveyed to the mechanism 12 is fed in the direction of the arrow Y <b> 1 by the first folding roller 51 and the second folding roller 52. At this time, the first folding roller 51 and the second folding roller 52 rotate in the Ra direction. The arrow Y1 direction in the second paper folding mechanism 22 is an extension direction of the first paper folding mechanism 12 in the arrow X1 direction. When the second fold F2 of the paper 100 comes to the position of the protruding member 71, the rollers 51 and 52 are stopped.

(2) Feeding operation Next, as shown in FIG. 31, the integral moving mechanism 9 is operated, and the first feeding roller 61, the second feeding roller 62, and the protruding member 71 move to the first position. That is, the protruding member 71 moves to the position P21 with the second fold F2, and both the feed rollers 61 and 62 move to the position P31 and together with the first folding roller 51 and the second folding roller 52, Although it is instantaneous, it rotates so that the 2nd crease | fold F2 may advance to a 1st direction. At this time, the first folding roller 51 rotates in the Ra direction, the first feeding roller 61 rotates in the Rb direction, the second folding roller 52 rotates in the Rb direction, and the second feeding roller 62 rotates in the Ra direction. . That is, the rollers 51, 61, 52, 62 rotate so that the second fold line F2 advances in the direction of the arrow X1. As a result, the sheet 100 is sandwiched between the first folding roller 51 and the second folding roller 52 with the second fold F2 as the head.

(3) Folding operation Next, as shown in FIG. 32, the integral moving mechanism 9 operates, and the first feed roller 61, the second feed roller 62, and the protruding member 71 move to the second position. That is, the protruding member 71 moves to the position P22, and the both feed rollers 61 and 62 move to the position P32. At this time, the first fold roller 51 and the second fold roller 52 rotate so that the second fold F2 advances in the direction of the arrow X1, so that the sheet 100 starts with the second fold F2 as the head. It is sandwiched between the first folding roller 51 and the second folding roller 52 and is fed in the direction of the arrow X1.

  Then, the paper 100 is conveyed to the decurling mechanism 23.

(Overview of operation)
The above-described operation is schematically shown in FIG.

[effect]
According to the first sheet folding mechanism 12 configured as described above, the following effects can be exhibited.

(1) In the feeding operation, the protruding member 71 moves to the position P21 with the first fold F1, and both the feeding rollers 61 and 62 move to the position P31, together with the both folding rollers 51 and 52. Although it is instantaneous, since the first fold F1 rotates so as to advance in the direction of the arrow X1, the first fold F1 of the paper 100 is reliably and smoothly moved to the first fold roller 51 and the second fold roller 52. Can be sent in between. Accordingly, the paper 100 can be accurately folded at the first fold F1.

(2) In the folding operation, the first feed roller 61 and the second feed roller 62 move to the position P33. Therefore, as shown in FIG. 29, during the folding operation, the portion 100A on the upstream side in the transport direction of the paper 100 is not sandwiched between the first folding roller 51 and the first feed roller 61, and is further downstream in the transport direction of the paper 100. The side portion 100 </ b> B is also not sandwiched between the second folding roller 52 and the second feed roller 62. Therefore, it is possible to prevent the paper 100 from being curled during the folding operation.

  In addition, according to the second sheet folding mechanism 22 configured as described above, the following effects can be exhibited.

(1) In the feeding operation, the projecting member 71 moves to the position P21 with the second fold F2, and the both feed rollers 61 and 62 move to the position P31 and together with the both folding rollers 51 and 52, Although instantaneously, the second fold F2 rotates so as to advance in the direction of the arrow X1, the second fold F2 of the paper 100 is surely and smoothly transferred to the first fold roller 51 and the second fold roller 52. Can be sent in between. Accordingly, the paper 100 can be accurately folded at the second fold line F2.

(2) In the folding operation, the first feed roller 61 and the second feed roller 62 move to the position P32. Accordingly, as shown in FIG. 32, during the folding operation, the portion 100 </ b> C on the upstream side in the transport direction of the paper 100 is not sandwiched between the first folding roller 51 and the first feed roller 61 and is downstream in the transport direction of the paper 100. The side portion 100 </ b> D is also not sandwiched between the second folding roller 52 and the second feed roller 62. Therefore, it is possible to prevent the paper 100 from being curled during the folding operation.

(3) In the folding operation, since the protruding member 71 is at the position P22, the inner edge 111 of the folded piece 101 of the paper 100 is placed along the curved surface portion 712 of the protruding member 71, as shown in FIG. It can be sent smoothly in the direction. Therefore, the folding process can be executed smoothly also from this point.

Moreover, according to the paper folding apparatus 1 having the above-described configuration, the following effects can be exhibited.
(1) Since the two sheet folding mechanisms 12 and 22 are provided, the folding process can be surely executed at the first fold F1 and the second fold F2.

(2) Since the protruding member 71 has the curved surface portions 712 and 713, the folded piece formed earlier can be smoothly fed by being along the curved surface portion in the subsequent folding process.

(3) In the folding operation, the first feed roller 61 and the second feed roller 62 move to the position P32 or the position P33, so that the paper sheet 100 can be prevented from being curled.

(4) When a jam occurs in one of the two paper folding mechanisms 12 and 22, the upper device unit 20 can be opened with respect to the lower device unit 10 to expose both mechanisms 12 and 22. Can easily remove jams.

(5) Although the upper device unit 20 can be opened and closed with respect to the lower device unit 10, the upper device unit 20 is constantly urged upward from the lower device unit 10 by the cylinder mechanism 30. It is always closed with respect to the lower device part 10 at the height position of the tip 42 of the fastener 40. Therefore, the height position of the second paper folding mechanism 22 with respect to the first paper folding mechanism 12 can always be maintained accurately at a constant value D1. Therefore, the folding process at the second fold line F2 in the second sheet folding mechanism 22 can be executed accurately.

  In addition, according to the paper folding apparatus 1 having the above-described configuration, it is possible to perform folding processing in a folding form as shown in FIGS. 19 to 22 as in the first embodiment.

  Further, during the folding operation of the second sheet folding mechanism 22 configured as described above, as the inner edge 111 of the folded piece 101 of the sheet 100 is fed in the direction of the arrow X1 along the curved surface portion 712 of the protruding member 71, The integral moving mechanism 9 may operate so as to move the first feed roller 61, the second feed roller 62, and the protruding member 71 from the second position to the third position.

  Further, in the sheet folding apparatus 1 of the first embodiment and the second embodiment, when it is not necessary to fold the sheet 100, the sheet is conveyed to the first sheet folding mechanism 12 via the conveyance path Ta. 2 and 3, the discharged paper 100 can be discharged from the discharge port 13 through the transport path Te. As a result, the paper 100 that does not require folding is linearly conveyed through the first paper folding mechanism 12 and discharged. Accordingly, it is possible to prevent the paper 100 that does not require folding from being curled or scratched.

  The paper folding mechanism of the present invention can fold a paper accurately at the crease, and furthermore, can prevent the paper from being curled and has great industrial utility value.

  DESCRIPTION OF SYMBOLS 1 Paper folding apparatus 10 Lower apparatus part 12 1st paper folding mechanism 20 Upper apparatus part 22 2nd paper folding mechanism 40 Fastener 51 1st folding roller 52 2nd folding roller 61 1st feeding roller 62 2nd feeding roller 7 Member movement Mechanism 71 Protruding member 711 Pointed portion 712, 713 Curved surface portion 8 Feed roller moving mechanism 9 Integrated moving mechanism

Claims (4)

In the paper folding mechanism for folding at the crease while transporting the paper,
A first folding roller and a second folding roller;
A first feed roller and a second feed roller;
A feed roller moving mechanism for moving the first feed roller and the second feed roller;
A protruding member;
A member moving mechanism for moving the protruding member;
A control unit;
With
The first folding roller and the second folding roller are provided so that the paper is sandwiched with the crease at the top and passed in the first direction.
The first feed roller is provided so that the paper can be fed between the first folding roller and the second direction perpendicular to the first direction,
The second feed roller is provided so that the paper can be sandwiched between the second folding roller and sent in any one of the second direction and the opposite direction.
The member moving mechanism is configured to move the protruding member between the feeding position, the guide position, and the standby position,
The feeding position is a position where the protruding member feeds the crease between the first folding roller and the second folding roller,
The guide position is a position where the protruding member guides the paper between the first folding roller and the second folding roller,
The standby position is a position where the protruding member does not contact the paper,
The feed roller moving mechanism is configured to move the first feed roller and the second feed roller between a feed position and a retracted position,
The feed position is a position where the first feed roller sandwiches the paper between the first folding roller, and the second feed roller sandwiches the paper between the second folding roller. Yes,
The retracted position is a position where the first feed roller separates a gap larger than the thickness of the paper from the first folding roller, and the second feed roller leaves a gap larger than the thickness of the paper from the second folding roller. Is the position,
The control unit
At the time of feeding operation, the first feeding roller and the second feeding roller are operated at the feeding position, the protruding member is moved to the feeding position, and the fold of the sheet advances in the first direction. It is designed to rotate, and
During the folding operation, the first feeding roller and the second feeding roller are moved to the retracted position, the protruding member is moved to the guide position or the standby position, and the first folding roller and the second folding roller are moved to the sheet. The fold line is rotated so as to advance in the first direction.
A paper folding mechanism characterized by that. In the paper folding mechanism for folding at the crease while transporting the paper,
A first folding roller and a second folding roller;
A first feed roller and a second feed roller;
A protruding member;
An integral moving mechanism for integrally moving the first feeding roller, the second feeding roller, and the protruding member;
A control unit;
With
The first folding roller and the second folding roller are provided so that the paper is sandwiched with the crease at the top and passed in the first direction.
The first feed roller is provided so that the paper can be fed between the first folding roller and the second direction perpendicular to the first direction,
The second feed roller is provided so that the sheet can be sandwiched between the second folding roller and fed in the direction opposite to the second direction.
The integral moving mechanism is configured to move the first feed roller, the second feed roller, and the protruding member between the first position, the second position, and the third position,
The first position is a position where the protruding member feeds the fold of the paper between the first folding roller and the second folding roller, and the first feeding roller feeds the paper to the first folding roller. And the second feed roller is a position where the sheet is sandwiched between the second folding roller,
The second position is a position where the protruding member guides the paper between the first folding roller and the second folding roller, and the first feed roller is larger than the thickness of the paper from the first folding roller. And a position where the second feed roller separates a gap larger than the thickness of the paper from the second folding roller.
The third position is a position where the protruding member does not contact the paper, and the first feed roller separates a gap larger than the gap from the first folding roller, and the second feed. A position where the roller separates a gap larger than the gap from the second folding roller;
The control unit
During the feeding operation, the first feeding roller, the second feeding roller, and the protruding member are moved to the first position, and the rollers are rotated so that the fold of the paper advances in the first direction. And again
At the time of the folding operation, the first feeding roller, the second feeding roller, and the protruding member are moved to the second position or the third position, and the first folding roller and the second folding roller are moved to the first folding line. It is designed to rotate to advance in one direction,
A paper folding mechanism characterized by that.   The protruding member spreads out so as to incline in the opposite direction to the first direction at the tip end portion for allowing the fold of the sheet to enter between the first folding roller and the second folding roller, and on both sides of the tip end portion. The sheet folding mechanism according to claim 1, further comprising a curved surface portion. A paper folding device comprising at least two paper folding mechanisms according to any one of claims 1 to 3 arranged vertically so that paper can be continuously folded. ,
The upper device section having the upper paper folding mechanism is provided so as to be openable and closable with respect to the lower apparatus section having the lower paper folding mechanism.
The paper folding mechanism of the lower device part is provided so as to be exposed when the upper device part is opened with respect to the lower device part,
The upper device part is always urged upward from the lower device part,
The sheet folding device, wherein the upper device section is hooked by a fastener extending from the lower device section and is closed with respect to the lower device section.

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