JP2013001001A - Binding structure for paper bundle and binding machine - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a binding structure for a paper bundle in which punched holes and cut holes are formed on a plurality of paper sheets and joined portions are formed by inserting cut and raised pieces which are cut and raised from the punched holes into the cut holes, so as to bind the plurality of paper sheets to each other, wherein the binding structure for the paper bundle is capable of solving the problem that the cut and raised piece and the cut hole which are joined to each other are easily detached from each other.SOLUTION: In the binding structure for the paper bundle B, the punched holes P1 and the cut holes P2 are formed on the plurality of paper sheets P and joined portions P3 are formed by inserting the cut and raised pieces P4 which are cut and raised from the punched holes P1 into the cut holes P2, so as to bind the plurality of paper sheets P to each other. Relief slits P5 for alleviating application of force added when the relative positions of the paper sheets P are changed to the joined portion P3 are provided in portions adjacent to the joined portion P3.

Description

  The present invention relates to a sheet bundle binding structure in which the ends of a plurality of overlapped sheets are integrally bound, and particularly a sheet bundle binding structure that does not use a metal needle, and the binding of this sheet bundle. The present invention relates to a binding machine for realizing the structure.

  Conventionally, a punching blade for forming a punching hole while forming cut and raised pieces on a plurality of sheets of paper, and a cut hole provided adjacent to the punching blade for locking the leading end side of the cut and raised piece are provided. A cutting blade to be installed, a base portion for holding the cutting blade and the cutting blade, and a punch base disposed on the base portion via a paper insertion gap, and held by the base portion. A punching hole and a cut hole are formed in the paper by causing the punching blade and the cutting blade to be driven so as to penetrate the paper inserted into the paper insertion gap and protrude toward the punch base. In the state where the tip side of the cut and raised piece cut and raised from the punching hole to the punch base is engaged with the cutting blade, the cutting blade and the cutting blade are returned to the base portion side. By making the cut and raised piece into the cut hole Stitching machine so as to bind the paper passed through are known (e.g., see Patent Document 1).

  However, in such a binding machine, a cut and raised piece corresponding to the width dimension of the cut hole is associated with the cut hole formed in the paper from the base end to the front end. That is, the plurality of sheets bound by the binding machine are maintained in a joined state so as to sink from the front side to the back side when the cut and raised pieces pass through the cut holes. For this reason, when a force is applied in the direction in which the bound sheets are separated or twisted, the state in which the cut and raised pieces are embedded may be released relatively easily and is difficult to hold. In particular, in the case of paper with low frictional resistance, for example, thermal paper used for receipts, the above-mentioned joining state is likely to come off, and some countermeasure is desired.

JP-A-8-300847

  It is an object of the present invention to provide a sheet bundle binding structure that can solve the problem that the joining state between the cut and raised pieces and the cut hole is easily removed, and a binding machine for realizing such a binding structure. And

  In other words, the binding structure of the sheet bundle according to the present invention forms a punched hole and a cut hole in a plurality of sheets, and inserts a cut and raised piece cut out from the punched hole into the cut hole so that a joint portion is formed. A binding structure of a bundle of sheets formed to bind the plurality of sheets to each other, and a force applied when changing the relative position of the sheets to a portion adjacent to the joint portion is applied to the joint portion. An escape slit is provided for alleviating the action.

  In this case, when a force is applied in the direction in which the bound sheets are separated or twisted, the force applied when changing the relative position of the sheets is applied to the base end portion of the escape slit. By acting and mitigating the action of this force on the joining portion, the relationship between the cut and raised piece and the cut hole is released, and the occurrence of a problem that the joined state is released can be suppressed.

  In the present invention, the “joining portion” includes the cut and raised pieces and the cut hole, and the punching hole is not included in the “joining portion”. In addition, the “paper” is a concept indicating a sheet-like material in general, and includes a paper material, a plastic material, a metal material, a wooden material, and the like.

  As a preferred example of the binding structure of such a sheet bundle, at least a part of the escape slit extends in a direction substantially along a direction in which the punching hole and the cut hole extend as a joining portion. It is done.

  Further, as an example of an effective configuration for making it difficult to remove the sheets constituting the sheet bundle, the escape slits form a pair that extends in a direction crossing the edge of the sheet binding side and separating from the edge. A slit and a back slit extending between the leading ends of the pair of side slits and extending generally along the edge of the binding source side of the paper, and perpendicular to the binding side edge of the length dimension of the side slit The component of the direction to do is larger than the distance from the line which connected the boundary of the side slit and the back slit to the base end of the punching hole.

  Furthermore, as another example of an effective configuration for making it difficult to remove the sheets constituting the sheet bundle, one end of the escape slit opens at the edge on the binding source side of the sheet, and the binding origin of the length dimension of the escape slit Examples include a component in a direction orthogonal to the side edge larger than the distance from the binding side edge to the cut hole.

  In addition, as another example of an effective configuration for making it difficult to remove the sheets constituting the sheet bundle, the escape slit extends in a direction intersecting with and separating from the edge of the sheet binding side. A side slit that connects between the leading ends of these side slits and extends in a direction generally along the edge of the binding side of the paper, and a back slit that is continuous with the base end of the punching hole, and the length of the side slit The component of the direction orthogonal to the edge of the binding origin side of the length dimension is larger than the distance in the direction orthogonal to the edge of the binding origin side from the base end of the punching hole to the cut hole.

  In addition, as an example of an effective configuration for making it difficult to remove the sheets constituting the sheet bundle, the escape slit is formed on the other side that forms one corner of the sheet from the edge on the binding source side that is one side that forms one corner of the sheet. An opening that extends along a certain edge, and a connecting portion that extends along the one side that forms one corner of the sheet from the tip of the opening and reaches the vicinity of the edge that is the other side that forms one corner of the sheet MP. The length of the connecting portion is larger than the distance from the opening to the end of the cut hole far from the opening, or the punched hole and the cut hole of the joining portion are used as the edges on the binding side of the paper. A side slit that is provided in parallel in the direction along which the escape slit extends in a direction perpendicular to the edge on the binding origin side from both ends thereof, and a direction along the edge on the binding origin side by connecting both ends of these side slits And a rear slit extending to Length of Tsu bets can also include those greater than the distance from the back slit to the side of the end closer to the inner slit punching holes.

  As a binding machine for realizing such a sheet bundle binding structure, a punching blade for forming the punching hole, a cutting blade for forming the cut hole, and a relief slit for forming the escape slit What comprises a slit formation blade is mentioned.

  As an example of a preferable configuration of such a binding machine, there is an example in which the slit forming blade forms an escape slit having one end opened at the edge of the binding source side of the paper.

  As another example of a preferable configuration of such a binding machine, the slit forming blade is formed with an escape slit having a shape in which both ends are positioned inside the edge of the binding source side of the paper and surrounds the joint portion. Can be mentioned.

  As an example of a preferable configuration of the binding machine including the slit forming blade that forms a relief slit having a shape surrounding the joining portion as described above, the cut hole is closer to the edge on the binding source side than the punching hole. The thing which has arrange | positioned the cutting blade and the cutting blade so that it may be mentioned is mentioned.

  As another example of a preferable configuration of the binding machine including the slit forming blade that forms the relief slit having a shape surrounding the joint portion as described above, the cut hole is an edge portion on the binding source side with respect to the punching hole. The thing which has arrange | positioned the cutting blade and the cutting blade so that it may be located near is mentioned.

  ADVANTAGE OF THE INVENTION According to this invention, the binding structure of the sheet | seat bundle which can solve the subject that the joining state of a cutting and raising piece and a cut hole tends to remove | deviate, and the binding machine for implement | achieving such a binding structure can be provided. .

1 is a schematic side view of a binding machine according to an embodiment of the present invention. XX sectional drawing in FIG. The YY sectional view taken on the line in FIG. The disassembled perspective view which shows the principal part of the binding machine which concerns on the same embodiment. The top view which shows the principal part of the binding machine which concerns on the same embodiment. Schematic which shows the action | operation of the binding machine which concerns on the same embodiment. Schematic which shows the action | operation of the binding machine which concerns on the same embodiment. Schematic which shows the action | operation of the binding machine which concerns on the same embodiment. Schematic which shows the action | operation of the binding machine which concerns on the same embodiment. The top view which shows typically the binding structure of the sheet | seat bundle of the embodiment. The figure which shows the effect | action at the time of relatively moving in the direction which twists each sheet | seat of the sheet | seat bundle of the embodiment. The top view which shows typically the binding structure of the sheet | seat bundle of other embodiment of this invention. The top view which shows typically the binding structure of the sheet | seat bundle of other embodiment of this invention. The top view which shows typically the binding structure of the sheet | seat bundle of other embodiment of this invention. The top view which shows typically the binding structure of the sheet | seat bundle of other embodiment of this invention. The top view which shows typically the binding structure of the sheet | seat bundle of other embodiment of this invention. The top view which shows typically the binding structure of the sheet | seat bundle of other embodiment of this invention. The top view which shows typically the binding structure of the sheet | seat bundle of other embodiment of this invention. The top view which shows typically the binding structure of the sheet | seat bundle of other embodiment of this invention. The figure which shows the effect | action at the time of turning the paper of the paper bundle of embodiment shown in FIG. The top view which shows typically the binding structure of the sheet | seat bundle of other embodiment of this invention. The top view which shows typically the binding structure of the sheet | seat bundle of other embodiment of this invention. The figure which shows the effect | action at the time of turning the paper of the paper bundle of embodiment shown in FIG. The top view which shows typically the binding structure of the sheet | seat bundle of other embodiment of this invention. The top view which shows typically the binding structure of the sheet | seat bundle of other embodiment of this invention. The top view which shows typically the binding structure of the sheet | seat bundle of other embodiment of this invention. The top view which shows typically the binding structure of the sheet | seat bundle of other embodiment of this invention. The top view which shows typically the binding structure of the sheet | seat bundle of other embodiment of this invention.

  Hereinafter, an embodiment of the present invention will be described with reference to FIGS.

  In this embodiment, the sheet punching processing apparatus according to the present invention is applied to a binding machine 1 for binding a plurality of sheets P.

  The binding machine 1 forms punch holes P1 and cut holes P2 in a plurality of sheets of paper P, and inserts the cut and raised pieces P4 cut and raised from the punch holes P1 into the cut holes P2. The sheets P are bound together so that a booklet B, that is, a sheet bundle can be formed. Further, the punching blade 32 which is a blade used in the binding machine 1 can form the punching hole P1, and the cutting blade 33 which is a blade used in the binding machine 1 is a slit-shaped cut hole P2. Can be formed. Details will be described below.

  2 and 3, the booklet B is formed by bundling a plurality of sheets P, and these sheets P are formed at one joint portion P3 set at the edge Pa or corner of the binding side. Are joined to each other. The joining portion P3 includes slit-shaped cut holes P2 formed in the paper P adjacent to the punching holes P1 formed in the paper P by the punching blade 32 penetrating from the one surface Px side of the paper P. It is composed of a cut and raised piece P4 cut and raised from the punching hole P1 to the other surface Py side of the paper P. The plurality of sheets P are joined to each other by allowing the leading end P41 portion of the cut and raised piece P4 to pass through the cut hole P2 and lead to the one surface Px side of the sheet P. The cut hole P2 is mainly for engaging the cut and raised piece P4, and extends in a direction substantially orthogonal to the direction toward the punching hole P1. An escape slit P5 is provided at a portion adjacent to the joint portion P3 to relieve the force applied when changing the relative positions of the sheets from acting on the joint portion P3. In the present embodiment, one end of the escape slit P5 is open at the edge on the binding source side of the paper, and extends in a direction perpendicular to the edge. In the present embodiment, the escape slit P5 is provided in a pair, and the joint portion P3 is disposed between the pair of the escape slits P5.

  On the other hand, the binding machine 1 includes a punching blade 32 that forms a punching hole P1 while forming a cut and raised piece P4 and a relief slit P5 on a plurality of sheets of paper P, and is provided adjacent to the punching blade 32. A cutting blade 33 for forming a cut hole P2 for locking the tip P41 side of the piece P4, and a slit for forming the escape slit P5 provided at the portion adjacent to the cutting blade 32 and the cutting blade 33 A forming blade 37, a base portion 2 that holds the punching blade 32, the cutting blade 33, and the slit forming blade 37, and a punch base 4 disposed on the base portion 2 via a paper insertion gap 35. It has. Then, the punching blade 32, the cutting blade 33, and the slit forming blade 37 held by the base portion 2 are driven so as to penetrate the paper P inserted into the gap 35 and protrude toward the punch table 4 side. As a result, a punching hole P1, a cut hole P2, and a relief slit P5 are formed in the paper P. Next, in a state where the tip P51 side of the cut and raised piece P4 cut and raised from the punching hole P1 to the punch base 4 is engaged with the cutting blade 33, the cutting blade 33 and the cutting blade 32 are connected to the base portion 2 side. The sheet P is bound by passing the cut and raised piece P4 through the cut hole P2 by performing the extraction operation so as to return to the position.

  In other words, the binding machine 1 is for joining a plurality of sheets P to make a booklet B. By moving upward from the standby position (N) to the protruding side, the punching hole P1, A base for accommodating the cutting blade 32, the cutting blade 33 and the slit forming blade 37 for forming the cut hole P2 and the relief slit P5, and the cutting blade 32, the cutting blade 33 and the slit forming blade 37 at the standby position (N). The slide member 31 that holds the portion 2, the punching blade 32, the cutting blade 33, and the slit forming blade 37 and can be moved up and down in the up and down direction, which is a protruding and retracting direction with respect to the base portion 2, is the outer surface side of the base portion 2 The punch table 4 is provided on the upward surface 211d side through a gap 35 for inserting the paper P. An operation lever 5 is rotatably attached to the base portion 2, and a link mechanism (not shown) connected to the operation lever 5 is accommodated inside the base portion 2.

  As shown in FIG. 1, a base frame 21 having a space for accommodating a blade unit 3 having a punching blade 32, a cutting blade 33, and a slit forming blade 37, as shown in FIG. The base cover 22 is fitted on the lower side of the frame.

  The base frame 21 has an opening 211a through which the punching blade 32 and the cutting blade 33 pass, and an opening 211b through which the slit forming blade 37 passes, on the top wall 211 thereof. A bearing portion (not shown) provided near the edge of the opening 211a for receiving a shaft 341 of an inner cam 34, which will be described later, and an inner cam 34 provided adjacent to the bearing portion are provided on the lower surface side of the ceiling wall 211. A locking wall 211c for locking the arm 344 is provided. A gap 35 for inserting the paper P is formed between the upward surface 211 d which is the upper surface of the top wall 21 and the downward surface 41 a of the punch table 4. A positioning wall 21 a for positioning the paper P is provided at the end of the gap 35 in the paper insertion direction.

  As shown in FIGS. 4 to 9, the blade unit 3 is guided by a rail groove (not shown) formed in the base portion 2 and can be moved up and down while maintaining a vertical posture, and is attached to the slide member 31. A punching blade 32, a cutting blade 33 arranged adjacent to the punching blade 32, a slit forming blade 37 provided in a pair at a portion adjacent to the punching blade 32 and the cutting blade 33, The slide member 31 is rotatable via a shaft 341 between an initial posture (S) that is disposed inside the punching blade 32 and fits in the punching blade 32 and a rotational posture (K) that protrudes outside the punching blade 32. The inner cam 34 is supported, and a coil spring CS (not shown) that urges the inner cam 34 to rotate in the direction of self-return to the initial posture (S). An elastic body (not shown) is provided between the slide member 31 of the blade unit 3 and the base frame of the base portion 2 to bias the slide member 31 downward using the base frame as a scaffold.

  As shown in FIGS. 4 and 6 to 9, the slide member 31 is a block having a protrusion (not shown) that engages with a rail groove 2 x provided in the base frame 21 of the base portion 2 so as to be slidable in the vertical direction. It is connected to the link mechanism via a drive shaft 36.

  As shown in FIGS. 4 to 9, the punching blade 32 is for forming the cut and raised pieces P4 on the paper P, and is formed by punching and bending a single sheet metal material. Yes.

  As shown in FIGS. 4 to 9, the cutting blade 33 forms a cut hole P2 composed of a straight slit, and is made by punching and bending a single sheet metal material. It has been. In the central portion of the cutting blade 33, a window 33a is formed for passing the cut and raised piece P4 punched from the paper P and engaging the cut and raised piece P4.

  The slit forming blade 37 forms a straight relief slit P5 as shown in FIGS. 4 to 9, and is made by punching a sheet metal material. The slit forming blades 37 are provided in a pair on the left and right sides, and the punching blade 32, the cutting blade 33, and the inner cam 34 are arranged between the slit forming blades 37 forming a pair.

  As shown in FIGS. 4 and 6 to 9, the inner cam 34 has a shaft 341 at the base end and a push-out portion for inserting the cut and raised piece P4 at the tip end into a window 33 a provided in the cutting blade 33. The shaft 341 is supported by the punching blade 32 and the slide member 31. At the base end of the inner cam 34, an arm 343 for rotating the inner cam 34 is projected.

  The blade unit 3 configured as described above is moved upward via the link mechanism housed in the base frame 21 by operating the operation lever 5.

  As shown in FIGS. 4 and 6 to 9, the punch table 4 is formed with a slit through hole 411 into which the punching blade 32 and the cutting blade 33 can be inserted, and a through hole into which the slit forming blade 37 can be inserted. Part 412. Specifically, the punch base 4 is a punch case for punching a punching hole P1 in the paper P in cooperation with the punching blade 32 at the lower portion of the top case 42 and a top case 42 having a flat box shape. An anvil 41 is provided.

  As shown in FIGS. 4 and 6 to 9, the anvil 41 forms a punching hole P <b> 1 in the paper P in cooperation with the punching blade 32 and is a hole through which the cutting blade 33 passes. The base part 2 is made of metal having a hole 411 and the slit forming part 412 through which the slit forming blade 37 can be inserted, and is superposed on the lower surface of the top case 42. The frame 21 is attached using screws (not shown). As described above, a gap 35 for inserting the paper P is formed between the downward surface 41 a of the anvil 41 and the upper surface 211 d of the top wall 211 of the base frame 21.

  Next, the operation of the binding machine 1 will be described with reference to FIGS.

  In a state where the operation lever 5 is not operated, as shown in FIG. 6, the slide member 31 is held at the lower limit position, and the inner cam 34 maintains the initial posture (S) accommodated in the extraction blade 32. In this state, the plurality of stacked sheets P are inserted to the back of the gap 35 formed between the upward surface 211d of the base frame 21 and the downward surface 41a of the anvil 41.

  Thereafter, when the operation lever 5 is operated upward, the force applied to the operation lever 5 is transmitted to the drive shaft 36 through the link mechanism, and is converted into the upward movement of the slide member 31 and transmitted.

  When the slide member 31 starts to move upward, the tips of the punching blade 32, the cutting blade 33, and the slit forming blade 37 attached to the slide member 31 come into contact with one surface Px of the paper P, and the paper P is brought into contact with the anvil 41. Is pushed up to the position where it is pressed against. When the operation lever 5 is further operated upward from this position, the paper P is pressed against the anvil 41 by the punching blade 32, the cutting blade 33, and the slit forming blade 37, and the state shown in FIG. The punching blade 32, the cutting blade 33, and the slit forming blade 37 penetrate the paper P, and the paper P is punched with a punching hole P1, a cutting hole P2, and a relief slit P5. When the punching blade 32, the cutting blade 33, and the slit forming blade 37 are further lifted after drilling, the arm 343 of the inner cam 34 disposed inside the punching blade 32 contacts the locking portion 211c as shown in FIG. The inner cam 34 rotates to the rotation posture (K) against the urging force of the coil spring CS disposed between the inner cam 34 and the slide member 31. As a result, the leading end side of the cut and raised piece P4 cut and raised from the punching hole P1 to the other surface Py side of the paper P is inserted into the window 33a of the cutting blade 33.

  Next, when the operation of the operation lever 5 is released, that is, when the grasped hand is released, as shown in FIG. 9, the blade unit 3 is pulled out by the urging force of the elastic body, that is, the direction toward the standby position (N). The inner cam 34 returns to the initial posture (S) from the rotational posture (K). Then, the punching blade 32 and the cutting blade 33 move downward on the immersion side, and the punching blade 32 and the cutting blade 33 are extracted from the paper P while the paper P is pulled away from the anvil 41. At that time, as shown in FIG. 10, the cut and raised piece P4 inserted into the window D3 of the cutting blade 33 passes through the cut hole P2 and is extracted to the one surface Px side of the paper P, as shown in FIGS. As shown in FIG. 10, a plurality of sheets P are combined by the cutting blade 33.

  In the booklet S formed in this way, when the bound sheets P are relatively moved in the twisting direction, the force applied when changing the relative positions of the sheets P is, as shown in FIG. It acts on the base end portion P5a of the escape slit P5 before P3.

  Further, in the present embodiment, the relief slit P5 extends from the binding source side edge Pa in a direction perpendicular to the edge Pa, and the length dimension d1 thereof is the edge Pa from the binding source side edge Pa to the cut hole P2. It is larger than the distance d2 in the orthogonal direction.

  That is, according to the present embodiment, the force applied when changing the relative positions of the sheets P acts on the base end portion P5a of the escape slit P5 before the joining portion P3, that is, the force on the joining portion P3. By avoiding the application of the pressure, the force acting on the joint portion P3 is reduced as compared with the case where the escape slit P5 is not provided. Therefore, when such a force is applied, the relationship between the cut and raised piece P4 and the cut hole P2 is released, and the occurrence of a problem that the joined state of the joined portion P3 is released can be suppressed.

  Further, since the length dimension d1 of the escape slit P5 is larger than the distance d2 in the direction perpendicular to the edge Pa from the binding edge Pa to the cut hole P2, the relative position of the sheets P is changed. The force applied at that time can be more reliably applied to the base end portion P5a of the escape slit P5, and therefore, the occurrence of a problem that the joined state of the joined portion P3 is more effectively removed can be suppressed.

  The present invention is not limited to the embodiment described above.

  Here, FIG. 12 to FIG. 19, FIG. 21, FIG. 22, and FIG. 24 to FIG. 28 are schematic diagrams, and the shape of the cut hole and the shape of the punched hole and the relief slit immediately after the punching are indicated by solid lines. The shape of the cut and raised piece in the state of being engaged with is shown by a two-dot chain line. Further, although not shown, the punching blade, the cutting blade, and the slit forming blade have shapes corresponding respectively to the shapes of the punching hole, the cutting hole, and the relief slit shown in the drawing. Accordingly, in other embodiments described below, the components corresponding to the above-described embodiments include “B”, “C”, “D”, “E”, “F”, “G”, “ H, “I”, “J”, “K”, “L”, “M”, “N”, “O”, “P”, and the like will be denoted by the same reference numerals. The detailed explanation is omitted.

  In the first embodiment, as schematically shown in FIG. 10, a straight line perpendicular to the edge is formed on both sides in the direction along the edge Pa on the binding side of the paper P across the joining portion P3, and one end is Although the description has been given of the case where the escape slit P5 opened at the edge Pa on the binding side of the paper P is provided as a pair, the present invention is not limited to such a case. Examples of modifications in which the relief slits P5 opened at the edge Pa on the binding source side are provided as a pair include those shown in FIG. 12, FIG. 13, and FIG. Each figure will be described below.

  The binding structure of the booklet BB that is a bundle of sheets shown in FIG. 12 is provided with a relief slit BP5 that forms an arc and has one end opened to the edge BPa on the binding origin side of the sheet BP. A joint portion BP3 is provided between the slits BP5.

  The binding structure of the booklet CB, which is a bundle of sheets shown in FIG. 13, is provided so as to form a pair of relief slits CP5 that are linear and open at one edge CPa on the binding origin side of the paper CP, and between the relief slits CP5. Is increased as it approaches the edge CPa on the binding origin side of the sheet CP, and a joint portion CP3 is provided between the pair of relief slits CP6.

  The binding structure of the booklet DB as a bundle of sheets shown in FIG. 14 is provided so as to form a straight line and a pair of relief slits DP5 having one end opened to the edge DPa on the binding source side of the sheet DP, and between these relief slits DP5. Is made smaller as it approaches the edge DPa on the binding side of the paper DP, and a joint portion DP3 is provided between the pair of relief slits DP5.

  Even if these configurations are adopted, if the bound sheets BP, CP, DP are moved relative to each other in the twisting direction, the force applied when changing the relative positions of the sheets BP, CP, DP will be different from each other. Since it acts on the base end portions BP5a, CP5a, DP5a of the escape slits BP5, CP5, DP6 prior to the portions BP3, CP3, DP3, the same effects as those according to the above-described embodiment can be obtained.

  Further, also in these modes, the binding origin side edges BPa, CPa, DPa from the binding edges BPa, CPa, DPa of the sheets BP, CP, DP to the base ends of the slits BP5, CP5, DP5 are provided. The distances Bd1, Cd1, and Dd1 in the direction orthogonal to the binding edges BPa, CPa, DPa on the binding origin side from the edges BPa, CPa, DPa on the binding origin side of the paper BP, CP, DP to the cut holes BP2, CP2, DP2 If the distance is larger than the distances Bd2, Cd2, and Dd2 perpendicular to the direction, the force applied when the relative positions of the sheets BP, CP, and DP are changed is more surely released, and the base end portions BP5a of the release slits BP5, CP5, and DP5 , CP5a and DP5a, and therefore, the joint state of the joint portions BP3, CP3 and DP3 is more effectively removed. It is possible to suppress the occurrence of focus.

  Further, it is also conceivable that both ends are located inside the edge on the binding side of the paper, and a relief slit having a shape surrounding the joint portion is formed. Examples of such a sheet bundle binding structure include those shown in FIGS. 15, 16, 17, 18, and 19. Each figure will be described below.

  The binding structure of the booklet EB which is a bundle of sheets shown in FIG. 15 includes a pair of side slits EP51 which form a pair extending from both ends to the edge EPa on the binding origin side of the sheet EP and extending in a direction away from the edge EPa. There is an escape slit EP5 integrally connected with a back slit EP52 that connects the ends of the paired side slits EP51 and extends in the direction along the edge EPa on the binding origin side of the paper EP. Further, a joint portion EP3 is provided in the region defined by the escape slit EP5, in other words, in the region defined by the side slit EP51 and the back slit EP52. The cut hole EP2 of the joining portion EP3 is arranged closer to the edge EPa on the binding origin side than the punching hole EP1. In addition, in this aspect, the force applied when changing the relative position of the papers EP is released, and the base of each side slit EP51 is effectively suppressed to prevent the paper EP from being damaged by being applied to the base end EP5a of the slit EP5. Relief short slits EP50 extending in directions away from the ends are provided.

  The binding structure of the booklet FB that is a bundle of sheets shown in FIG. 16 extends from both ends in a direction away from the edge FPa on the binding origin side of the paper FP, and extends in a direction toward each other as it is separated from the edge FPa on the binding origin side. A pair of side slits FP51 and a back slit FP5 integrally connecting a front end portion of the paired side slits FP51 and extending in a direction along the edge FPa on the binding side of the paper FP. Have Further, a joint portion FP3 is provided in a region defined by the escape slit FP5, in other words, in a region defined by the side slit FP51 and the back slit FP52. The cut hole FP2 of the joint portion FP3 is arranged closer to the binding side edge FPa than the punching hole FP1. And the said back slit FP52 is following the base end part of the punching hole FP1.

  The binding structure of the booklet GB that is a bundle of sheets shown in FIG. 17 includes a pair of side slits GP51 that extend from both ends to the edge GPa on the binding origin side of the sheet GP and extend in a direction away from the edge GPa. It has a relief slit GP5 integrally provided with a curved back slit GP52 that connects the leading ends of the paired side slits GP51 and bulges away from the edge GPa on the binding origin side of the paper EP. Further, a joint portion GP3 is provided in a region defined by the escape slit GP5, in other words, in a region defined by the side slit GP51 and the back slit GP52. The cut hole GP2 of the joint portion GP3 is disposed closer to the binding edge side edge GPa than the punching hole GP1.

  The binding structure of the booklet HB, which is a bundle of sheets shown in FIG. 18, includes a pair of side slits HP51 extending from both ends to the edge HPa on the binding origin side of the sheet HP and extending in a direction away from the edge HPa. There is a relief slit HP5 integrally connected with a back slit HP52 that connects the leading ends of the paired side slits HP51 and extends in a direction along the edge HPa on the binding origin side of the paper FP. Further, a joint portion HP3 is provided in the region defined by the escape slit HP5, in other words, in the region defined by the side slit HP51 and the back slit HP52. The cut hole HP2 of the joining portion HP3 is arranged closer to the edge HPa on the binding origin side than the punching hole HP1. The back slit HP62 is continuous with the base end of the punching hole HP1. In this aspect, the length dimension Hd1 of the side slit HP51 is greater than the distance from the base end HP1a of the punching hole HP1 to the cut hole HP2, that is, the distance Hd2 from the base end HP4a of the cut and raised piece HP4 to the cut hole HP2. It is getting bigger. In other words, the length of the slit forming blade for forming the side slit EP51 is the shortest distance from the base end of the punching blade to the cutting blade, that is, for forming the back slit EP52 of the slit forming blade. It is larger than the shortest distance from the part to the cutting blade.

  The binding structure of the booklet IB that is a bundle of sheets shown in FIG. 19 is a relief slit that forms a pair that extends from both ends in a direction away from the edge IPa on the binding source side of the sheet IP and connects to the base end of the punching hole IP1. IP5. Further, a joint portion IP3 is provided in a region defined by the pair of relief slits IP5. The cut hole IP2 of the joint portion IP3 is arranged closer to the edge IPa on the binding source side than the punching hole IP1.

  In the booklet EB to IB which is a bundle of sheets having such escape slits EP5 to IP5, when the sheets EP to IP are turned from the edge on the opposite side to the edge EPa to IPa on the binding side, as shown in FIG. The turning force relating to the sheets EP to IP does not go directly to the joint portions EP3 to IP3 but is applied to both ends EP5a to IP5a of the escape slits EP5 to IP5, and is first partitioned by the escape slits EP5 to IP5. In other words, the other portions are separated from the other sheets EP to IP, and in other words, the portions defined by the escape slits EP5 to IP5 are cut out. Then, when the portion along the line connecting both ends of the escape slits EP5 to IP5 is separated from the other papers EP to IP, the portion defined by the escape slits EP5 to IP5 is separated from the other papers EP to IP. Is affected. FIG. 20 shows the booklet EB having the mode shown in FIG. 15, but in the case of booklets FB to IB having the mode shown in FIGS.

  Also in this aspect, the force applied when the bound sheets EP to IP are relatively moved in the twisting direction is the ends EP5a to IP5a of the escape slits EP5 to IP5 prior to the joint portions EP3 to IP3. Act on.

  That is, according to the binding structure of the sheet bundle of this aspect, when the sheets EP to IP are turned from the edge on the opposite side to the edges EPa to IPa on the binding source side, and in the direction in which the relative positions of the sheets EP to IP are twisted. In the case of relative movement, the force applied to the papers EP to IP acts on the ends EP5a to IP5a of the escape slits EP5 to IP5 before the joining portions EP3 to IP3. Therefore, such escape slits EP5 to IP5 are provided. Compared with the case where there is not, the force which acts on the said junction part EP3-IP3 is relieve | moderated. Therefore, when such a force is applied, the engagement between the cut and raised pieces EP4 to IP4 and the cut holes EP2 to IP2 is released, and the occurrence of a problem that the joining state of the joining parts EP3 to IP3 is unintentionally removed is suppressed. can do.

  On the other hand, according to these aspects, when the sheets EP to IP are turned from the binding source side edges EPa to IPa, the binding source side of the cut holes EP2 to IP2 positioned near the binding source side edge is changed by the turning force. The cut and raised pieces EP4 to IP4 are lifted away from the paper EP to IP, and the state where the cut and raised pieces EP4 to IP4 are inserted into the cut holes EP2 to IP2 is released. That is, according to these aspects, the turning force from the binding source side edges EPa to IPa is easily transmitted to the joining portions EP3 to IP3, and the paper EP is formed by turning the paper EP to IP from the binding source side edges EPa to IPa. It can be easily removed intentionally from the booklets EB to IB without damaging the IP.

  Further, according to the embodiment of FIG. 15, the length dimension Ed1 of the side slit EP51 is made larger than the distance Ed2 from the back slit EP52 to the base end EP1a of the punching hole EP1, that is, the base end EP4a of the cut and raised piece EP4. Therefore, the force applied when the relative positions of the papers EP are changed can be more reliably applied to the base end part EP5a of the escape slit EP5, and therefore the joining state of the joining part EP3 is more effectively released. It is possible to suppress the occurrence of malfunctions.

  In addition, also in the embodiment of FIG. 17, the length dimension Gd1 of the side slit GP51 is such that the base end GP1a of the punching hole GP1 from the line connecting the boundary GP53 between the side slit GP51 and the back slit GP52, that is, the cutting piece GP4. If the distance Gd2 is larger than the distance Gd2 to the base end GP4a, the force applied when changing the relative positions of the paper GPs can be more reliably applied to the base end portion GP5a of the escape GP GP5. In addition, it is possible to suppress the occurrence of a problem that the joined state of the joined part GP3 is removed.

  Further, according to the aspect of FIG. 18, the length dimension Hd1 of the side slit HP51 is set to the distance from the base end HP1a of the punching hole HP1 to the cut hole HP2, that is, from the base end HP4a of the cut and raised piece HP4 to the cut hole HP2. Since the distance Hd2 is greater than the distance Hd2, the force applied when changing the relative positions of the sheets HP can be more reliably applied to the base end portion HP5a of the escape slit HP5. Generation | occurrence | production of the malfunction which the joining state of the part HP3 remove | deviates can be suppressed.

  In addition, also in the modes of FIGS. 16 and 19, the components Fd1 and Id1 in the direction orthogonal to the binding side edges FPa and IPa of the length dimension of the side slit FP51 or the relief slit IP5 are the punch holes FP1 and IP1. The distance in the direction perpendicular to the binding origin side edges FPa and IPa from the base ends FP1a and IP1a to the cut holes FP2 and IP2, that is, the binding origin side from the base ends FP4a and IP4a of the cut and raised pieces FP4 and IP4 to the cut holes HP2 If it is larger than the distances Fd2 and Id2 in the direction perpendicular to the edges FPa and IPa, the force applied when changing the relative positions of the paper FP and IP is more reliably released, and the base end portions FP5a of the escape slits FP5 and IP5, It is possible to act on IP5a, and therefore, more effectively, the joint portion FP3 and the joint state of IP3 are disengaged. It is possible to suppress the raw.

  On the other hand, as shown in FIGS. 21 and 22, examples of the binding structure of the sheet bundle suitable for making it difficult to remove the sheet from the sheet bundle even when the sheet is turned from the edge of the binding source side. Can be mentioned. Each figure will be described below.

  The binding structure of the booklet JB which is a sheet bundle shown in FIG. 21 includes a pair of side slits JP51 which form a pair extending from both ends perpendicular to the edge on the binding source JPa side of the sheet JP and extending away from the edge JPa. A relief slit JP5 is integrally provided with a back slit JP52 that connects between the leading ends of the paired side slits JP51 and extends in a direction along the edge JPa on the binding side of the paper JP. Further, a joint portion JP3 is provided in a region defined by the escape slit JP5, in other words, in a region defined by the side slit JP51 and the back slit JP52. In this embodiment, the punching hole JP1 is disposed closer to the edge JPa on the binding side than the cut hole JP2 of the joint portion JP3. Further, in this aspect, the length dimension Jd1 of the side slit JP51 is larger than the distance Jd2 from the back slit JP52 to the base end JP1a of the punching hole JP1, that is, the base end JP4a of the cut and raised piece JP4. In other words, the length of the slit forming blade for forming the side slit JP51 is larger than the shortest distance from the slit forming blade for forming the back slit JP52 to the base end of the punching blade. is doing.

  The binding structure of the booklet KB which is a bundle of sheets shown in FIG. 22 includes a pair of side slits KP51 extending from both ends to the edge KPa on the binding origin side of the sheet KP and extending in a direction away from the edge KPa. There is a relief slit KP5 that is integrally provided with a curved back slit KP52 that connects the ends of the paired side slits KP51 and bulges away from the edge KPa on the binding side of the paper KP. Further, a joint portion KP3 is provided in a region defined by the escape slit KP5, in other words, in a region defined by the side slit KP51 and the back slit KP52. In this embodiment, the punching hole KP1 is arranged closer to the edge KPa on the binding origin side than the cut hole KP2 of the joining portion KP3.

  In the booklet JB, KB which is a bundle of sheets provided with such escape slits JP6, KP6, when the sheets JP, KP are turned from the edge JPa, KPa opposite the binding side, as shown in FIG. The turning force relating to the papers JP and KP is applied directly to both ends JP5a and KP5a of the escape slits JP5 and KP5 without directly going to the joint portions JP3 and KP3, and is first partitioned by the escape slits JP5 and KP5 and joined portions JP3 and KP3. In other words, the other portions are separated from the other sheets JP and KP, in other words, the portions defined by the escape slits JP5 and KP5 are cut out. Then, when the portion along the line connecting the two ends JP5a and KP5a of the escape slits JP5 and KP5 is separated from the other papers JP and KP, the portion partitioned by the escape slits JP5 and KP5 is not from the other papers JP and KP. The effect is to be separated. FIG. 23 shows the booklet JB having the mode shown in FIG. 21, but each part similarly receives the above-described action in the case of the booklet KB having the mode shown in FIG.

  Also in this embodiment, the force applied when the bound sheets JP, KP are relatively moved in the twisting direction is such that the one end JP5a, KP5a of the relief slits JP5, KP5 is ahead of the joint portions JP3, KP3. Act on.

  That is, even in the case of the sheet bundle binding structure of this aspect, when the sheets JP and KP are turned from the edge JPa and KPa on the opposite side of the binding source, and in the direction in which the relative positions of the sheets JP and KP are twisted. When moved, the force applied to the papers JP and KP acts on the escape slits JP5 and KP5 at the ends JP5a and KP5a before the joint portions JP3 and KP3. Therefore, such escape slits JP5 and KP5 are not provided. Compared to the case, the force acting on the joint portions JP3 and KP3 is relaxed. Therefore, when such a force is applied, the relationship between the cut and raised pieces JP4 and KP4 and the cut holes JP2 and KP2 is released, and the occurrence of a problem in which the joined state of the joined portions JP3 and KP3 is unintentionally suppressed is suppressed. can do.

  In addition, when the paper JP, KP is turned from the binding side edge in the booklet JB, KB, which is a sheet bundle provided with the relief slits JP5, KP5, from the binding side edge JPa, KPa to the joint portions JP3, KP3 15 is longer than that of the embodiment shown in FIG. 15 and the like, and after the portions near the punching holes JP1 and KP1 of the paper JP and KP are separated from the other paper JP and KP, they are turned to the joint portions JP3 and KP3 for the first time. Since the force acts, compared with the embodiment shown in FIG. 15 and the like, the turning force from the edges EPa to IPa on the binding origin side is not easily transmitted to the joining portions EP3 to IP3. Even when the paper is turned from the edge, it is possible to make it difficult to remove the papers JP and KP from the booklets JB and KB.

  Furthermore, according to the aspect of FIG. 21, the length dimension Jd1 of the side slit JP51 is larger than the distance Jd2 from the back slit JP52 to the base end JP1a of the punching hole JP1, that is, the base end JP4a of the cut and raised piece JP4. Therefore, the force applied when changing the relative positions of the sheets JP can be more reliably applied to the base end portion JP5a of the escape slit JP5, and therefore the joining state of the joining portion JP3 is more effectively released. It is possible to suppress the occurrence of malfunctions.

  Specifically, when the paper JP is a plain paper typified by PPC, the length dimension Jd1 of the side slit JP51 extends from the rear slit JP52 to the base end JP1a of the punching hole JP1, that is, the base end JP4a of the cut and raised piece JP4. When the distance Jd2 is smaller than the distance Jd2, when the upper sheet JP is turned up to the half-opened state with respect to the lower sheet JP, the bonding state of the bonding portion JP3 is released, whereas the length of the side slit JP51 is longer. When the length dimension Jd1 is larger than the distance Jd2 from the rear slit JP52 to the base end JP1a of the punching hole JP1, that is, the base end JP4a of the cut and raised piece JP4, the upper side paper JP is completely out of the lower side paper JP. Even if it is turned to the front of the spread state to be opened, the joint state of the joint part JP3 does not come off.

  When the paper JP is a thin paper typified by a receipt, the length dimension Jd1 of the side slit JP51 is based on the distance Jd2 from the back slit JP52 to the base end JP1a of the punching hole JP1, that is, the base end JP4a of the cut and raised piece JP4. Is smaller than the half-open state where the upper paper sheet JP stands up with respect to the lower paper sheet JP, in other words, in the middle from the half-open state to the spread state. When the joint portion JP3 is unbonded when turned to the first state close to the half-open state, the length dimension Jd1 of the side slit JP51 is changed from the back slit JP52 to the base end JP1a of the punched hole JP1, that is, a cut and raised piece. When the distance Jd2 to the base end JP4a of JP4 is larger than the lower sheet JP, the upper sheet JP is completely opened. It is turned over to the front of the open state, in other words, even flipping from the half-opened state to a second state close to double-spread state of the way leading to the spread condition does not deviate the bonding state of the bonding portion JP3.

  Also in the embodiment of FIG. 22, the length dimension Kd1 of the side slit KP51 is changed from the line connecting the boundaries KP53 between the side slit KP51 and the back slit KP52 to the base end KP1a of the punched hole KP1, that is, the base of the cut and raised piece KP4. If the distance Kd2 is larger than the distance Kd2 to the end KP4a, the force applied when changing the relative position of the sheets KP can be more reliably applied to the base end portion KP5a of the escape slit KP5. Therefore, it is possible to suppress the occurrence of a problem that the bonded state of the bonded portion KP3 is more effectively removed.

  In addition, as shown in FIGS. 24 and 25, when binding at the corners of the sheets LP and MP, that is, when the joining portions LP3 and MP3 are formed at the corners of the sheets LP and MP, the joining portions LP3, Relief slits LP5 and MP5 may be provided in a portion adjacent to MP3, and the joining portions LP3 and MP3 may be positioned between the escape slits LP5 and MP5 and the paper LP and one edge LPa of the MP.

  The relief slit LP5 shown in FIG. 24 has an arc shape centered on the corner of the paper LP, and one end is open to an edge (edge on the binding side) LPa that forms one corner of the paper LP, and the other end is paper. It has a shape that reaches the vicinity of the edge LPb that forms the other side that forms the corner of the LP.

  The relief slit MP5 shown in FIG. 25 extends from an edge (edge on the binding side) MPa that forms one corner of the paper MP to an edge MPb that is the other side that forms one corner of the paper MP. And a connecting portion MP52 extending from the tip of the opening MP51 along the one side MPa forming one corner of the paper MP and reaching the vicinity of the edge LPb which is the other side forming one corner of the paper MP. In this aspect, the length Md1 of the connecting portion MP52 is larger than the distance Md2 from the opening MP51 to the end MP2a of the cut hole MP2 farther from the opening MP51. In other words, the length of the slit forming blade for forming the connecting portion MP52 is the end of the slit forming blade on the side farther from the opening MP51 of the punching blade from the portion for forming the opening MP51. It is larger than the shortest distance.

  When the joint portions LP3 and MP3 are formed at the corners of the papers LP and MP, the papers LP and MP are also turned when the papers LP and MP are twisted. Since the force is applied from the opposite side across the center of the sheet, the force applied to the sheets LP and MP is applied to the relief slits LP5 and MP5 before the joining portions LP3 and MP3 even by the binding structure of the sheet bundle of this aspect. Since it acts on the ends LP5a and MP5a, the force acting on the joint portions LP5 and MP5 is relieved as compared with the case where such escape slits LP5 and MP5 are not provided. Therefore, when such a force is applied, the engagement between the cut and raised pieces LP4 and MP4 and the cut holes LP2 and MP2 is released, and the occurrence of a problem that the joined state of the joined portions LP3 and MP3 is unintentionally removed is suppressed. can do. In particular, according to the aspect of FIG. 25, the length dimension Md1 of the connecting portion MP52 is larger than the distance Md2 from the opening MP51 to the end MP2a of the cut hole MP2 on the side far from the opening MP51. The force applied when changing the relative positions of the paper MPs can be more reliably applied to the base end portion MP5a of the escape slit MP5, and therefore, the joining state of the joining portion MP3 is more effectively removed. Can be suppressed.

  As shown in FIG. 26, when the punching hole NP1 and the cut hole NP2 of the joint portion NP3 are provided in parallel in the direction along the edge NPa on the binding origin side of the paper NP, both ends NP5a are respectively connected to the paper NP. An escape slit NP5 having a shape that is located at a portion that is separated from the binding edge NP3 and is closer to the binding edge NP3 than the joint portion NP3 and that surrounds the joint portion NP3 by a straight line connecting the both ends NP5a. As shown in FIG. 27, the punching hole OP1 and the cut hole OP2 of the joint portion OP3 are provided in parallel in the direction along the edge OPa on the binding source side of the paper OP, and the binding source side from both ends NP5a. A pair of side slits OP51 extending in a direction perpendicular to the edge OPa, and connecting the both ends of the side slits OP51 and extending in the direction along the binding side edge OPa And a slit OP52, embodiments are also conceivable having relief slit OP5 shape surrounding the junction OP3 by the straight line connecting the two ends OP5a. In particular, in the embodiment of FIG. 27, the length dimension Od1 of the side slit OP51 is changed from the back slit OP52 to the end OP1a on the side close to the back slit OP52 of the punching hole OP1, that is, the end OP4a on the side close to the back slit OP52 of the cut and raised piece OP4. Is larger than the distance Od2. In other words, the length of the slit forming blade for forming the side slit OP51 is from the portion of the slit forming blade for forming the back slit OP52 to the end of the punching blade near the back slit OP52. It is larger than the shortest distance. If the mode of FIG. 27 is employed, the force applied when changing the relative positions of the papers OP can be more reliably applied to the base end part OP5a of the escape slit OP5, and therefore the joint part can be more effectively performed. Generation | occurrence | production of the malfunction which the joining state of OP3 remove | deviates can be suppressed.

  In addition, in each of the above-described embodiments, the cut hole is formed in a straight line. However, the first slit for mainly engaging the cut and raised pieces and the direction of the punch hole from both ends of the first slit are bent. The shape of the cut hole may be arbitrarily set such that the second slit is a pair of second slits extending in the left-right direction. Further, in each of the above-described embodiments, the end of the escape slit extends in a direction substantially orthogonal to the edge on the binding origin side of the paper, but in the direction along the edge on the binding origin side of the paper at the end of the escape slit. The shape of the end portion of the escape slit may be variously modified, such as by further providing a flange portion that extends.

  The shapes of the punched hole, cut hole and cut and raised piece may be as described below. That is, as shown in FIG. 28, the cut and raised piece PP4 according to this embodiment includes a proximal end region PP44 on the proximal end PP4a side with the boundary portion PP43 interposed therebetween, and a distal end region PP45 on the distal end PP41 side. . The base end region PP44 has a substantially rectangular shape, and is set to have the same width dimension from the base end PP4a of the cut and raised piece PP4 to the boundary part PP43. The distal end region PP45 is integrally formed from the boundary portion PP43 side of the proximal end region PP44, and has an arrow shape with the distal end PP41 sharpened. The tip region PP45 includes a wide portion PP46 having a width dimension w2 larger than the boundary portion PP43 and the tip PP41 between the boundary portion PP43 and the tip PP41 of the cut and raised piece PP4. The punching hole PP1 has a size and shape corresponding to the cut and raised piece PP4.

  On the other hand, as shown in FIG. 28, the cut hole PP2 has a first slit L1 for mainly engaging the cut and raised piece PP4, and a left and right extending from the middle of the first slit L1 by bending in the direction of the punch hole P1. The second slit L2 is paired in the direction. The first slit L1 includes a linear main slit L11 and a sub slit L12 that bends and extends from both ends of the main slit L11 in the other direction, that is, in the direction opposite to the second slit L2. The second slit L2 extends from a boundary portion between the main slit L11 and the sub slit L12. In the cut hole PP2, the first slit L1 and the second slit L2 form a certain angle, and in this embodiment, between the first slit L1 and the second slit L2. The angle is set to approximately 90 degrees. In this embodiment, the length of the first slit L1 is longer than the length of the second slit L2, and the lengths of the paired second slits L2 are set to be substantially the same. is there. The width dimension w2 of the wide portion PP46 of the cut and raised piece PP4 is set to a value larger than the length w1 of the main slit L11.

  In this embodiment, the escape slit PP5 has the same configuration as that of the embodiment shown in FIG. That is, a pair of side slits PP51 extending in a direction perpendicular to the edge on the binding source PPa side of the paper PP from both ends and extending away from the edge PPa, and the tip ends of the paired side slits PP51 are connected. The paper sheet PP is integrally provided with a back slit PP52 extending in a direction along the edge PPa on the binding side. Further, the joint portion PP3 is disposed in the region defined by the escape slit PP5, in other words, in the region defined by the side slit PP51 and the back slit PP52. In this embodiment, the punching hole PP1 is disposed closer to the binding side edge PPa than the cut hole PP2 of the joint portion PP3. In this aspect, the length dimension Pd1 of the side slit PP51 is larger than the distance Pd2 from the back slit PP52 to the base end PP1a of the punching hole PP1, that is, the base end PP4a of the cut and raised piece PP4. In other words, the length of the slit forming blade for forming the side slit PP51 is greater than the shortest distance from the slit forming blade for forming the back slit PP52 to the base end of the punching blade. is doing.

  If comprised in this way, since the edge from the wide part PP46 of the cutting and raising piece PP4 to the base end PP42 can be engaged with the second slit L2, the cutting and raising piece PP4 is connected to the first slit L1. In addition to being engaged, the second slit L2 is also engaged, so that the joining state of the cut and raised piece PP4 and the cut hole PP2 can be made more reliable. That is, even when the first slit L1 is greatly opened in the vertical direction, the cut and raised piece PP4 and the second slit are engaged with the second slit L2. The engagement with L2 is not released and the engagement state is maintained. Therefore, the joining state of the cut and raised piece PP4 and the cut hole PP2 can be made better than the conventional one. Also with such a configuration, the length dimension Pd1 of the side slit PP51 is larger than the distance Pd2 from the back slit PP52 to the base end PP1a of the punching hole PP1, that is, the base end PP4a of the cut and raised piece PP4. The force applied when changing the relative positions of the sheets PP can be more reliably applied to the base end portion PP5a of the escape slit PP5. Therefore, the joining state of the joining portion PP3 is more effectively removed. The occurrence of defects can be suppressed.

  Also in the embodiments shown in FIGS. 16 to 19, 21, 22, 27, and 28, clearance short slits extending in directions away from the base ends of the side slits EP 51 to KP 51, OP 51, PP 51 are provided. In the embodiment shown in FIG. 26, escape short slits extending in directions away from both base ends NP5a of the escape slit NP5 may be provided.

  In addition, various changes may be made without departing from the spirit of the present invention.

B, BB-PB ... Booklet (sheet bundle)
P, BP to PP: paper P1, BP1 to PP1 ... punching holes P2, BP2 to PP2 ... cut holes P3, BP3 to PP3 ... joints P4, BP4 to PP4 ... cut and raised pieces P5, BP5 to PP5 ... relief slits 1 ... Binding machine 32 ... Cutting blade 33 ... Cutting blade 37 ... Slit forming blade

Claims (12)

A punching hole and a cut hole are formed in a plurality of sheets, and a joining portion is formed by inserting a cut and raised piece cut out from the punching hole into the cut hole, and the plurality of sheets are bound to each other. A binding structure of a bundle of sheets,
A binding structure for a sheet bundle, characterized in that a relief slit is provided in a portion adjacent to the joint portion to relieve the force applied when changing the relative position of the sheets from acting on the joint portion. . 2. The sheet bundle binding structure according to claim 1, wherein at least a part of the escape slit extends in a direction substantially along a direction in which the punching hole and the cut hole extend as a joining portion. A pair of side slits that extend in a direction that intersects with and separates from the edge of the paper binding origin, and the leading edge of the pair of side slits connects the escape slit to the paper binding origin side. And a slit in the direction perpendicular to the binding side edge of the length dimension of the side slit is punched from a line connecting the boundaries of the side slit and the back slit. The sheet bundle binding structure according to claim 1 or 2, wherein the binding structure is larger than a distance to a base end of the hole. One end of the escape slit opens at the edge on the binding origin side of the paper, and the component in the direction perpendicular to the binding origin side edge of the length of the escape slit is determined by the distance from the binding origin edge to the cut hole. The binding structure for a sheet bundle according to claim 1 or 2, wherein the binding structure is larger. The escape slit connects a pair of side slits that cross the edge of the sheet binding origin and extends in a direction away from the edge, and the leading edge of the side slit to connect the edge of the sheet binding origin. A component extending in a direction generally extending and having a rear slit continuous with the proximal end portion of the punched hole, and a component in a direction perpendicular to the binding side edge of the length dimension of the side slit is cut from the proximal end of the punched hole. The sheet bundle binding structure according to claim 1 or 2, wherein the binding structure is larger than a distance in a direction perpendicular to the edge on the binding source side. The relief slit extends from the edge of the binding origin side, which is one side forming one corner of the paper, to the edge which is the other side forming one corner of the paper, and from one end of the opening to the corner of the paper. A connecting portion extending along the one side to be formed and reaching the vicinity of the edge which is the other side forming one corner of the paper MP, and the length dimension of the connecting portion is far from the opening portion of the cut hole from the opening portion. The sheet bundle binding structure according to claim 1, wherein the binding structure is larger than a distance to an end of the sheet bundle. A punching hole and a cut hole at the joint portion are provided in parallel in the direction along the edge on the binding origin side of the paper, and the relief slit extends from both ends thereof in a direction perpendicular to the edge on the binding origin side and forms a pair. And a back slit that connects both ends of the side slit and extends in a direction along the edge of the binding origin side, and the length dimension of the side slit is a distance from the back slit to the end near the back slit of the punched hole The binding structure of a sheet bundle according to claim 1 or 2, wherein the binding structure is larger. A binding machine for realizing the binding structure of a sheet bundle according to claim 1, 2, 3, 4, 5, 6, or 7.
A binding machine comprising: a punching blade for forming the punching hole; a cutting blade for forming the cut hole; and a slit forming blade for forming the escape slit. The binding machine according to claim 8, wherein the slit forming blade forms an escape slit having one end opened at an edge on a binding source side of the paper. The binding machine according to claim 8, wherein the slit forming blade forms an escape slit having both ends positioned inside an edge on a binding source side of the paper and surrounding the joint portion. The binding machine according to claim 10, wherein the cutting blade and the cutting blade are arranged so that the cut hole is positioned closer to the edge on the binding source side than the punching hole. The binding machine according to claim 10, wherein the punching blade and the cutting blade are arranged so that the punching hole is positioned closer to the edge on the binding source side than the cut hole.

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