JP2014083837A - Binding machine - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a binding machine capable of reducing a space of an insertion port and simultaneously preventing a binding part from being caught therein.SOLUTION: A binding machine includes: a blade unit 41 having a first blade 43 for forming a raised piece in a booklet, a second blade 44 having a window part to which the tip of the raised piece is inserted and forming a slit, and a push-out cam 45 for bending the raised piece to insert the tip into the window part; and a lever 51 slid to project and recess the blade unit 41 to and from an insertion port 22. In the insertion port 22, a placing surface for the booklet serves as a die 22b, and the die 22b is provided with a die hole 28 where the first and second blades 43, 44 and the push-out cam 45 enter. The opening end of the die hole 28 is provided with a guide part 31 formed to guide a binding part of a paper sheet having the raised piece bent and the leading end locked in the slit from the die hole 28 to the drawing side for the booklet.

Description

  The present invention relates to a binding machine that binds a booklet in which a plurality of sheets are stacked using a part of the booklet.

  Patent Literature 1 describes a binding machine that binds a booklet in which a plurality of sheets are stacked using a part of the booklet. This binding machine includes a blade unit that is slid in a direction of punching a predetermined position of a booklet. This blade unit includes a first blade that forms a punching hole for forming a cut and raised piece in a booklet, a window portion into which the tip of the cut and raised piece is inserted, and the tip of the cut and raised piece is locked. A second blade that forms a slit, and an extrusion cam that bends the cut and raised piece and inserts the tip portion into the window portion. The blade unit is slid in the body so as to punch out a predetermined position of the booklet when the operation lever is turned by the user.

  The body has an insertion slot into which a booklet is inserted. When the booklet is inserted into the insertion slot and the lever is turned, the blade unit enters the insertion slot and slides in the direction of punching out the booklet. Then, with respect to the booklet in the insertion slot, the first blade forms a U-shaped punching hole, and the second blade forms a slit at a position close to the punching hole. At the same time, the push cam pushes the tip portion of the cut and raised piece formed by the punching hole into the window portion of the second blade. Then, when the blade unit is retracted from the insertion port, the leading end portion of the cut and raised piece inserted through the window portion of the second blade is inserted into the slit and locked on the opposite surface of the booklet. As a result, the booklet is bound by the cut and raised pieces.

JP 2012-51729 A

  The binding machine as described above binds a plurality of sheets by bending the cut and raised pieces and inserting and locking the leading end of the cut and raised pieces to the opposite surface of the booklet. Accordingly, the binding portion in which a plurality of sheets are bound is thicker than the other portions because the cut and raised pieces overlap each other, and rises on the bent side of the cut and raised pieces. The insertion opening is formed with a through-hole through which the tip of the blade unit temporarily enters on the other surface opposite to the surface on which the blade unit enters, that is, the booklet placement surface. Therefore, when the booklet is bound and the booklet is pulled out from the insertion slot, the binding portion where the cut and raised piece is bent and becomes thicker than the other part of the booklet is caught in the through-hole into which the tip of the blade unit has temporarily entered. Sometimes.

  In Patent Document 1, in order to prevent the binding portion of the booklet from being caught in the through hole in the insertion port, a pair of protrusions are formed on the placement surface and in front of the through hole. The pair of projecting portions separates the booklet having the binding portion caught in the through-hole from the placement surface so that the booklet is not caught when it is pulled out from the insertion port.

  However, when the protruding portion is provided, the binding portion is thicker than the other portions of the booklet and cannot pass through the portion where the protruding portion is provided. Therefore, when the protrusion is provided at a position close to the through-hole, the space between the protrusion and the protrusion is narrow, so that the pullable range of the booklet is narrowed.

  On the other hand, when the interval between the projections is widened, the range in which the booklet can be pulled out can be widened. However, the booklet may be bent between the protrusions. If it does so, the binding part thicker than the other part of a booklet may be caught in a through-hole.

  Further, an insertion restricting protrusion that restricts the number of inserted sheets constituting the booklet may be further formed in the insertion slot. However, when the insertion restricting protrusion is also formed in front of the through hole, the booklet can be pulled out only so as to avoid the insertion restricting protrusion.

  In such a binding machine, in order to prevent the bent cut and raised pieces from being opened again, and to make the binding portion in which the cut and raised pieces are bent as thin as possible so as not to be bulky. It is necessary to squeeze the bent portion of the raised piece in the insertion opening, that is, to compress and deform it. By the way, as described above, in order to eliminate the catch between the protruding portion and the binding portion in the insertion port, the interval between the insertion ports may be widened. However, when the interval between the insertion openings is widened, the binding portion where the cut and raised pieces are bent cannot be squeezed in the insertion opening. On the other hand, if the interval between the insertion openings is narrowed in order to handle the spelling portion, the projection portion and the spelling portion will be caught. Thus, the relationship between the ironing (compression deformation) of the bent portion of the cut and raised piece and the protrusion of the spelling portion is a trade-off relationship.

  The present invention has been made in view of the above-described problems, and an object of the present invention is to provide a binding machine that can eliminate the binding of the binding portion while narrowing the interval between the insertion openings.

  The binding machine according to the present invention includes a body in which an insertion port into which a booklet on which a plurality of sheets are stacked is inserted is formed, a first blade that forms a punching hole for forming a cut and raised piece in the booklet, A second blade that has a window portion into which the tip portion of the cut and raised piece is inserted and forms a slit in which the tip portion of the cut and raised piece is locked; A blade unit disposed on one of the opposing surfaces of the insertion port of the body 21, and a slide so that the blade unit protrudes and retracts in the insertion port. Then, with the tip of the cut and raised piece locked to the window of the second blade, the second blade is pulled out from the slit, and the tip of the cut and raised piece is locked to the slit. And a drive unit for

  The insertion port is provided with a die on the other surface opposite to the one surface, a die hole into which the first and second blades and an extrusion cam enter is formed in the die, and the opening of the die hole is formed. At the end, a guide portion is formed that guides the binding portion of the sheet, in which the cut-and-raised piece is bent and the front end portion is locked to the slit, from the die hole to the booklet drawing side.

  The insertion opening can be formed with a reduced portion that reduces the binding portion in the thickness direction. The die may be integrally formed with the body.

  In the present invention, a guide portion is formed at the opening end of the die hole to guide the binding portion of the paper whose cut and raised pieces are bent and the front end portion is locked to the slit from the die hole to the booklet drawing side. Yes. Therefore, the binding portion can move smoothly when pulled out from the die hole. In addition, it is not necessary to form a protrusion in the booklet insertion opening to prevent the binding portion of the booklet from being caught, and accordingly, the interval between the insertion openings can be narrowed to further reduce the overall size. it can.

It is a perspective view of a binding machine. It is a side view of a binding machine It is a disassembled perspective view of a binding machine. It is a side view which shows the state which removed one half which comprises the body of a binding machine, and shows an initial state. It is sectional drawing of the binding machine of the state shown to FIG. 4A. (A) is sectional drawing of the binding part formed in a booklet, (B) is a perspective view. It is a perspective view which shows the mounting surface by the side of the die | dye part of the insertion port in which the insertion number control protrusion was formed. It is a top view which shows the mounting surface by the side of the die part of the insertion port in which the insertion number control protrusion was formed. It is a top view which shows the mounting surface by the side of the die | dye part of the insertion port in which the insertion number control protrusion is not formed. It is sectional drawing of an insertion port vicinity and a guide part. (A)-(C) is sectional drawing of the modification of an insertion port vicinity and a guide part. It is a perspective view which shows the state which formed the rib around the die hole, and is a modification of the mounting surface on the die part side of the insertion port. The modification which formed the guide part narrowly in the front side of die hole is shown, (A) is a top view, (B) shows sectional drawing. It is a perspective view of a blade unit. It is a side view which shows the state which removed one half which comprises the body of a binding machine, and shows a state when a booklet is inserted in an insertion port and a lever begins to rotate. It is sectional drawing of the binding machine of the state shown to FIG. 14A. It is a side view which shows the state which removed one half which comprises the body of a binding machine, and shows the state which rotated the lever to the last. It is sectional drawing of the binding machine of the state shown to FIG. 15A. It is sectional drawing of a binding machine, and shows the state which the lever began to return to an initial position. It is sectional drawing of a binding machine, and shows the state by which the front-end | tip part of the cutting and raising piece was penetrated by the slit of the booklet. It is sectional drawing of a binding machine, and shows the state when it starts to pull out the booklet bound by the cutting and raising piece from the insertion slot. It is sectional drawing of a binding machine, and shows the state which pulled out the booklet bound by the cutting and raising piece from the insertion port, and moved to the mounting surface. It is sectional drawing of a binding machine, and shows the state when the booklet bound by the cutting and raising piece is almost pulled out from the insertion slot. (A) is a top view of one half which comprises a body, (B) is a top view of the other half which comprises a body. It is a perspective view of the other half which comprises a body.

  Hereinafter, a binding machine to which the present invention is applied will be described with reference to the drawings.

  As shown in FIGS. 1 to 4A and 4B, a binding machine 11 to which the present invention is applied is a device for binding a booklet 1 formed by stacking a plurality of sheets 1a. Using this, the binding portion 2 for binding the stacked sheets 1 is formed. Specifically, the binding machine 11 stores a blade unit 41 that forms the binding portion 2 in a body 21 in which an insertion port 22 into which a booklet 1 is inserted is formed on the front side. The lever 51 attached to the body 21 is slid by rotating, and the binding portion 2 is formed on the booklet inserted into the insertion port 22.

  Here, with reference to FIGS. 5A and 5B, the binding unit 2 that binds the stacked sheets 1a formed in the booklet 1 will be described. The binding portion 2 includes a punching hole 3 punched in a U-shape at a predetermined binding position, and a slit 4 formed in the vicinity of the U-shaped opening end of the punching hole 3. The punching hole 3 forms a cut and raised piece 5 inside thereof. The cut-and-raised piece 5 is folded back with the slit 4 side as the base end, and the distal end portion 5 a is inserted through the slit 4 and is locked on the opposite surface of the booklet 1. As a result, the booklet 1 on which the sheets 1 a are stacked is bound by the cut and raised pieces 5. The binding portion 2 in which a plurality of sheets 1a are bound rises as the folded and raised pieces 5 overlap, and becomes thicker than other portions.

  As shown in FIGS. 1 to 4A and B, the body 21 is configured by butting and joining a pair of halves 21a and 21b each formed by molding a synthetic resin such as polycarbonate. Of course, the pair of halves 21a and 21b are integrally joined together by the screws 33 here, but may be joined by an adhesive or welding.

  The body 21 formed by combining the pair of halves 21a and 21b has a main body portion 23 in which the blade unit 41 is mainly disposed, and a grip portion 24 extending from the main body portion 23 to one side. The main body portion 23 is formed with an insertion port 22 into which the booklet 1 to be bound is inserted on the front side. The insertion port 22 is formed at a position biased to one side in the height direction of the main body 23. The larger one sandwiching the insertion port 22 of the main body portion 23 becomes the unit arrangement portion 25 where the blade unit 41 is arranged, and the smaller one becomes the die portion 26 serving as a punch base. The height (width) h of the insertion opening 22 is set to be approximately the same as or slightly larger than the thickness of the maximum number of sheets to be bound. For example, when the maximum number of sheets to be bound is 8, the thickness corresponding to 8 sheets of the sheet 1a. It is set to be substantially the same as or slightly larger. A blade entry hole 27 that allows the first and second blades of the blade unit 41 to enter the insertion opening 22 is formed on one surface 22a of the insertion opening 22 on the unit mounting portion 25 side. . The other surface (hereinafter also referred to as “mounting surface”) 22 b of the insertion opening 22 on the die portion 26 side is a die, and is located at the tip of the first and second blades at a position facing the blade entry hole 27. A die hole 28 is formed to enter.

  In addition, the insertion opening 22 has a size that is substantially the same as or slightly larger than the thickness of the maximum number of sheets to be bound, so that the binding portion 2 of the booklet 1 drawn out from the die hole 28 is located in front of the die hole 28, that is, the booklet 1. On the insertion side, the insertion surface 22 is sandwiched between one surface 22a on the unit arrangement portion 25 side and the placement surface 22b on the die portion 26 side so that it can be ironed. That is, the area of the insertion opening 22 before the die hole 28 functions as a reduction unit 30 that squeezes the binding portion 2, compresses and deforms, and reduces the thickness of the binding portion 2. As the reducing portion 30, a projecting portion or a bulging portion for compressive deformation is formed on the one surface 22a and / or the placement surface 22b on the unit placement portion 25 side, and one surface 22a on the unit placement portion 25 side. And the mounting surface 22b may be configured with a narrow interval.

  In general, the booklet 1 is often inserted from the insertion port 22 on the front side of the main body 23 and pulled out from the front side. Therefore, the front side of the insertion port 22 is widened up and down so as to become an insertion guide portion 32 when the booklet 1 is inserted into the insertion port 22.

  Insertion number restricting projections 29 and 29 for restricting the number of sheets 1a to be inserted into the insertion opening 22 are formed on the back side of the die hole 28 of the mounting surface 22b, as shown in FIGS. Has been. The binding portion 2 of the booklet 1 rises as the cut and raised pieces 5 are bent and overlapped, and becomes thicker than other portions. For this reason, the height h of the insertion opening 22 is set to be the same as the thickness of the maximum binding number or slightly larger than the maximum binding number. Accordingly, it is possible to insert the booklet 1 having more sheets 1a than the maximum number of bindings into the insertion slot 22. Therefore, the insertion number restricting projections 29 and 29 are formed in the insertion opening 22 so that the distance between the apex of the insertion number restricting protrusions 29 and 29 and the surface of the insertion opening 22 on the unit arrangement portion 25 side is maximized. The thickness is made smaller than the thickness of the booklet 1 of the number of sheets to be bound. As a result, more sheets 1a than the maximum number of sheets can be prevented from being inserted into the insertion slot 22, and the blade unit 41 and the like can be prevented from being damaged.

  Further, the distance between the apex of the insertion number restricting projections 29 and 29 and the surface of the insertion opening 22 on the unit arrangement portion 25 side is smaller than the thickness of the booklet 1 having the maximum number of bindings. Here, since the insertion number restricting protrusions 29 and 29 are formed on the back side of the die hole 28 of the placement surface 22b, the pullable range of the booklet 1 can be widened. Of course, the insertion number restricting protrusions 29 and 29 may be formed deeper than the die hole 28. FIG. 8 shows an example in which the insertion number restriction protrusions 29 and 29 are not formed on the mounting surface of the insertion opening 22 on the die part 26 side. In the example of FIG. 7, the insertion number restriction protrusions 29 and 29 are formed, but the pullable range of the booklet 1 is substantially the same as the case where the insertion number restriction protrusions 29 and 29 shown in FIG. 8 are not formed. can do.

  As shown in FIGS. 6 to 9, the binding portion 2 of the booklet 1 is pulled out in the direction of pulling out the booklet at the opening end (ridge line) of the die hole 28 formed in the mounting surface 22b of the insertion port 22 on the die portion 26 side. A guide portion 31 is formed for guiding. The guide portion 31 is formed in a U-shape over a range of the front side and the side where the bound booklet 1 can be pulled out. Here, the guide portion 31 is formed in an inclined surface, that is, a C-plane shape. As described above, the die portion 26 side of the insertion opening 22 is a surface on which the curved portion rises on the side where the cut and raised piece 5 is bent so as to be inserted into the slit 4 (of the binding portion 2 in FIGS. 17 and 18). (Refer to the curved part 5b). The guide portion 31 has a C-surface shape so that the binding portion 2 positioned in the die hole 28 can smoothly ride on the placement surface 22b when punching.

  Note that the shape of the guide portion 31 may be an R-surface shape as shown in FIG. 10 (A), an arc shape as shown in FIG. 10 (B), and further, as shown in FIG. As shown in C), a stepped shape may be used. Further, as shown in FIG. 11, a rib 30a is formed around the die hole 28, and the binding portion 2 is formed between the top surface of the rib 30a and one surface 22a of the insertion opening 22 on the unit arrangement portion 25 side. It is good also as the reduction | decrease part 30 which squeezes and compresses and deforms and reduces the thickness of the spelling part 2. FIG. In this case, the space between the top surface of the rib 30a and the one surface 22a of the insertion opening 22 on the unit arrangement portion 25 side is set to be approximately the same or larger than the thickness of the maximum number of sheets to be bound. In addition, the inside of the rib 30 a becomes the guide portion 31. In addition, in the mounting surface 22b on the die portion 26 side of the insertion port 22, the region 30b outside the rib 30a is one step lower than the top surface of the rib 30a. Therefore, the insertion opening 22 becomes wide, and it is possible to easily insert the booklet 1 to be bound.

  In general, the booklet is often inserted from the insertion port 22 on the front side of the main body 23 and pulled out from the front side. Therefore, as shown in FIGS. 12A and 12B, the guide portion 31 may be formed in a U-shape within a narrow range only on the front side of the die hole 28 (the drawer side of the booklet 1). . In this case, the guide portion 31 is configured by a lower surface 31a such as a C surface, an R surface, or a step that descends from a front surface side of the main body portion 23, that is, a U-shaped curved portion. Both end portions are constituted by rising surfaces 31b such as a rising C surface, an R surface, or a step.

  The body 21 configured as described above forms a main body portion 23 and a grip portion 24 by abutting and joining the halves 21a and 21b, and the main body portion 23 includes a unit arrangement portion 25, a die portion 26, and the like. Configure. That is, the die part 26 can be configured integrally with the main body part 23 by simply butting and joining the halves 21a and 21b. Therefore, the production cost can be reduced as compared with the case where the die portion 26 is formed of a separate member, and the positional relationship between the die portion 26 (die hole 28) and the slide guide portion 48 that guides the blade unit 41 is reduced. For example, the first blade 43 and the second blade 44 of the blade unit 41 can be prevented from interfering with the die hole 28.

  As shown in FIGS. 3, 4 </ b> B, and 13, the blade unit 41 disposed inside the main body 23 includes a slider 42, and the striking piece 5 is formed on the booklet 1 on the slider 42. It has the 1st blade 43 which forms the extraction hole 3, the 2nd blade 44 which forms the slit 4 in which the front-end | tip part of this cutting and raising piece 5 is inserted, and the extrusion cam 45 which bends the cutting and raising piece 5 .

  The first blade 43 is formed in a U shape and is erected on the slider 42. The first blade 43 forms a U-shaped punching hole 3 and forms a tongue-shaped cut and raised piece 5. A second blade 44 that forms the slit 4 is provided close to the opening end side of the U-shaped first blade 43. The second blade 44 erected on the slider 42 has widened end portions 44b and 44b on both sides of the linear portion 44a, and the slider 42 so that the widened end portions 44b and 44b are located on the first blade 43 side. Established. The second blade 44 is formed with a window portion 44c into which the tip portion 5a of the cut and raised piece 5 formed by the first blade 43 is inserted.

  An extrusion cam 45 that bends the cut and raised piece 5 is provided inside the U-shaped first blade 43. Both ends of the push cam 45 are rotatably supported by a rotation shaft 46 attached to the first blade 43 and / or the slider 42. The pushing cam 45 is rotated at one end by a pushing portion 45a bent in an L-shape for pushing the cut and raised piece 5 to the window portion 44c of the second blade 44, and on the blade entry hole 27 side of the main body portion 23. And a pressed part 45b pressed by the piece 27a. Such a push cam 45 is urged in the direction of the arrow X in FIG. 13 by an urging member 47 such as a coil spring in the slider 42. The pressed portion 45 b faces the blade entry hole 27 between the first blade 43 and the second blade 44, and faces the rotation operation piece 27 a that partitions the blade entry hole 27. In the pushing cam 45, the pushed portion 45b is pressed by the turning operation piece 27a on the blade entry hole 27 side of the main body portion 23 in a state where the pushing portion 45a is retracted inside the U-shaped first blade 43. At this time, the urging member 47 rotates against the urging force of the urging member 47 about the rotation shaft 46 in the direction of the arrow X in FIG. 13, and the pushing portion 45 a protrudes from the first blade 43.

  The slider 42 on which the first and second blades 43 and 44 and the push cam 45 are disposed is guided by the slide guide portion 48 and is orthogonal to the paper surface of the booklet 1 inserted into the insertion port 22 ( Slide in the arrow Y direction and the counter arrow Y direction in FIG. The slide guide portion 48 is erected on a side surface facing the inner surfaces of the halves 21 a and 21 b constituting the body 21 side of the slider 42 in a direction perpendicular to the paper surface of the booklet 1 inserted into the insertion port 22. A guide piece 48a is formed, and the guide piece 48a is provided on a guide groove 48d formed by a pair of guide walls 48b and 48c which are erected on the inner surfaces of the halves 21a and 21b constituting the body 21 side of the slider 42. The slider 42 is guided by being engaged. Of course, in the slide guide portion 48, the slider 42 side may be a guide groove 48d, and the inner surfaces of the half bodies 21a and 21b may be guide pieces 48a.

  In FIG. 13, the slider 42 that slides in the direction of the arrow Y and the direction of the opposite arrow Y is such that the blade tips of the first and second blades 43, 44 enter the blade 22 on one surface 22 a on the unit mounting portion 25 side of the insertion port 22. It enters the insertion port 22 through the hole 27. The blade entry hole 27 is partitioned into a first through portion 27b and a second through portion 27c by a rotating operation piece 27a that presses the pressed portion 45b of the push cam 45. The first blade 43 enters the first through portion 27b, and the second blade 44 enters the second through portion 27c.

  The blade unit 41 configured as described above is attached to the lever 51 as shown in FIGS. 3, 4A, and 4B. The lever 51 has a rotation support hole 52 formed at the base end portion, and the distal end side forms a rotation operation portion 53 in cooperation with the grip portion 24 of the body 21. An attachment groove 54 for attaching the blade unit 41 is further formed at the base end portion of the lever 51, and an attachment protrusion 49 formed on the side surface of the blade unit 41 is engaged with the attachment groove 54. A rotation support portion 57 formed on one half 21a of the body 21 is inserted into the rotation support hole 52, and the lever 51 is moved by the rotation support portion 57 on the body 21 side as shown in FIGS. In FIG. 4B, it is supported so as to be rotatable in the direction of arrow A and in the direction of counter arrow A.

  The rotation support hole 52 is provided with a coil portion of a torsion coil spring 55 on the inner peripheral surface. In the torsion coil spring 55, one arm is locked in the locking groove 51 a of the lever 51, and the other arm is locked in a locking groove 56 formed in one half 21 a of the body 21. As a result, the lever 51 that is pivotally supported by the pivot support 57 is pivotally biased in the direction of the arrow A in FIGS. 1, 4A, and 4B by the biasing force of the torsion coil spring 55. As shown in FIG. 1, FIG. 4A and FIG. 4B, when the lever 51 is in an open state separated from the grip portion 24, the blade unit 41 is accommodated in the main body portion 23, and the first and second blades 43, 44. Is in a state of being retracted from the insertion port 22. Therefore, the booklet 1 to be bound can be inserted into the insertion slot 22 as shown in FIGS. 4A and 4B.

  Circular collars 58 and 58 are disposed around the rotation support hole 52 to reduce friction with the halves 21a and 21b constituting the body 21, and the lever 51 can smoothly rotate with respect to the body 21. I try to move.

  Next, a series of operations for binding the booklet 1 of the binding machine 11 configured as described above will be described. First, as shown in FIGS. 4A and 4B, before binding the booklet 1, the lever 51 is in a state of being urged to rotate in the direction of the opposite arrow A in FIGS. 4A and 4B by the urging force of the torsion coil spring 55. . In this state, the blade unit 41 is accommodated in the main body 23 and the cutting edges of the first and second blades 43 and 44 are retracted from the insertion port 22, and the booklet 1 to be bound is inserted into the insertion port 22. It is possible. The booklet 1 to be bound is inserted from the insertion opening 22 to the back. At this time, the insertion slot 22 is formed with insertion number restricting protrusions 29 and 29 on the mounting surface 22b on the die portion 26 side. Therefore, it is possible to prevent the insertion port 22 from inserting more sheets 1 a than the maximum number of bindings into the insertion port 22.

  When binding the booklet 1, the user holds the grip portion 24 and the lever 51 with one hand, and the lever 51 is brought close to the grip portion 24 against the urging force of the torsion coil spring 55 in the direction of arrow A in FIGS. 4A and 4B. Is rotated. Then, as shown in FIGS. 14A and 14B, the blade unit 41 is slid in the direction of the arrow Y in FIGS. 14A and 14B where the booklet 1 is punched out while being guided by the slide guide portion 48. Then, the first blade 43 of the blade unit 41 enters the insertion port 22 from the first through portion 27 b constituting the blade entry hole 27 of the insertion port 22, and the second blade 44 is inserted into the blade entry hole 27. It enters into the insertion port 22 from the second through portion 27c constituting the. Thus, the U-shaped punching hole 3 is formed by the first blade 43 and the slit 4 is formed by the second blade 44 in the booklet 1. Then, the cutting edges of the first and second blades 43 and 44 penetrating the booklet 1 enter the die hole 28 on the die portion 26 side of the insertion port 22. At this time, the extrusion cam 45 in the U-shaped first blade 43 bends the cut and raised piece 5 formed by the U-shaped punching hole 3 to approximately 90 ° by the pushing portion 45a.

  Further, when the lever 51 is rotated in the direction of arrow A in FIGS. 15A and 15B, the blade unit 41 further slides in the direction of arrow Y in FIGS. 15A and 15B where the booklet 1 is punched. Then, the pressed portion 45 b of the push cam 45 in the U-shaped first blade 43 is pressed by the rotation operation piece 27 a in the blade entry hole 27 of the insertion port 22. Then, the push cam 45 rotates in the direction of the arrow X in FIGS. 15A and 15B around the rotation shaft 46 against the urging force of the urging member 47, and the push portion 45 a protrudes from the first blade 43. Let As a result, the pushing portion 45a further presses the cut and raised piece 5 bent at approximately 90 °, inserts the tip portion 5a of the cut and raised piece 5 into the window portion 44c of the second blade 44, and further pushes the extruded piece 45a. The part 45a itself also enters the window part 44c. Thus, the cut and raised piece 5 is folded back to about 180 °.

  Next, when the user releases the lever 51, the lever 51 is rotated in the direction of the arrow A in FIG. 16 by the urging force of the torsion coil spring 55. That is, the blade unit 41 in a state where the first and second blades 43 and 44 and the push cam 45 have entered the insertion port 22 is inserted in accordance with the rotation of the lever 51 in the return direction. It slides in the direction of the opposite arrow Y in FIG. In accordance with this, the push cam 45 is rotated in the direction indicated by the arrow X in FIG. 16 by the biasing force of the biasing member 47 when the rotation operation piece 27a in the blade entry hole 27 is separated from the pressed portion 45b. To do. Thereby, the pushing portion 45a of the pushing cam 45 is retracted into the U-shaped first blade 43. On the other hand, the front end portion 5 a of the cut and raised piece 5 folded back to approximately 180 ° remains inserted into the window portion 44 c of the second blade 44.

  When the lever 51 is returned to the position shown in FIGS. 4A and 4B, the blade unit 41 is also in the initial position, that is, the main body 23 as shown in FIG. 17, and the cutting edges of the first and second blades 43 and 44 are moved. The state is retracted from the insertion port 22. At this time, the second blade 44 passes through the slit 4 with the tip 5a of the cut and raised piece 5 inserted in the window 44c, and the tip 5a of the cut and raised piece 5 reaches the opposite side of the booklet 1. To derive. Thereafter, the second blade 44 leaves the tip portion 5a of the cut and raised piece 5 in the insertion port 22 and leaves the main body portion 23 from the insertion port 22 via the second through portion 27c constituting the blade entry hole 27. Evacuate inside. As a result, the bound booklet 1 can be pulled out from the insertion slot 22.

  As shown in FIG. 17, in the state where the tip 5a of the cut and raised piece 5 is simply led out to the opposite surface through the slit 4, the cut and raised piece 5 is placed on the mounting surface 22b on the die part 26 side. On the side, the curved portion 5b is curved. That is, the cut-and-raised piece 5 is not folded back by approximately 180 ° with a firm crease line. Therefore, the curved portion 5 b is in a state of entering the die hole 28.

  When the user tries to pull out the booklet 1 bound from the state shown in FIG. 17 from the insertion slot 22, the curved portion 5 b of the cut and raised piece 5 is formed at the opening end of the die hole 28 as shown in FIG. It moves smoothly by the guide part 31 composed of a surface, an R surface, a step, or the like, that is, climbs onto the mounting surface 22b without being caught by the opening end of the die hole 28.

  As described above, the insertion opening 22 has a size that is approximately the same as or slightly larger than the thickness of the maximum number of sheets to be bound, so that the binding portion 2 of the booklet 1 drawn out from the die hole 28 can be placed in front of the die hole 28, that is, On the insertion side of the booklet 1, the insertion port 22 is sandwiched between one surface 22 a on the unit arrangement portion 25 side and the placement surface 22 b on the die portion 26 side so that it can be squeezed. Therefore, the cut and raised piece 5 inserted through the slit 4 drawn out from the die hole 28 is compressed and deformed and bent firmly in the reduced portion 30 before the die hole 28 as shown in FIG. Thereby, as shown in FIG. 20, the bound booklet 1 is pulled out from the insertion port 22 in a state where the cut and raised pieces 5 are not opened. When pulling out the booklet 1 from the insertion opening 22, insertion number restriction protrusions 29 and 29 are formed on the back side of the die hole 28. Therefore, as shown in FIGS. 7 and 8, the booklet 1 can be pulled out from the insertion port 22 in the same range as when the insertion number restricting projections 29 and 29 are not formed. In the binding machine 1, the insertion number restriction protrusions 29 and 29 may not be formed.

  The binding machine 1 configured as described above guides the binding portion 2 of the booklet 1 to the opening end of the die hole 28 formed on the mounting surface 22b on the die portion 26 side of the insertion port 22 in the booklet drawing direction. A guide portion 31 is formed. Therefore, as shown in FIGS. 17 to 20, even when the curved portion 5 b of the cut and raised piece 5 enters the die hole 28 when bound to the blade unit 41, the curved portion 5 b Then, the guide portion 31 configured by an R surface or a step is smoothly moved to the placement surface 22b without being caught by the opening end of the die hole 28. Therefore, the binding machine 1 can improve the operability when pulling out the booklet 1 from the insertion slot 22. Accordingly, in the binding machine 1, there is no need to form a projection portion for preventing the binding portion 2 of the booklet 1 from being caught in the insertion port 22, and accordingly, the interval between the insertion ports is narrowed and the whole is further updated. The downsizing can be realized.

  Further, the binding machine 1 can be assembled simply by disposing the pair of left and right halves 21a and 21b, which are molded products, to form the body 21 and disposing the blade unit 41 therein. Improvement in production efficiency can be realized. Moreover, the slide guide part 48 and the die part 26 which guide the blade unit 41 can be provided by abutting the pair of left and right halves 21a and 21b. Therefore, the positional relationship between the slide guide portion 48 and the die portion 26 is stabilized, and the first blade 43 and the second blade 44 of the blade unit 41 can be prevented from interfering with the die hole 28.

  By the way, in the binding machine 1 in which the pair of left and right halves 21a and 21b which are molded products are butt-joined, when the booklet 1 is bound, the die part 26 may be bent by a force for punching the booklet 1 applied to the die part 26. . Therefore, as shown in FIGS. 21 and 22, reinforcing ribs 34, 34 in the punching direction of the booklet 1 are integrally formed on the inner surface of the component part of the die part 26 of the pair of left and right halves 21a, 21b. . As a result, the mechanical strength of the die portion 26 is improved, and the die portion 26 can be made difficult to bend even by the force in the punching direction of the booklet 1.

  Furthermore, as shown in FIG. 21 (A), a boss 35 having a screw hole 35a at the center is erected at a portion constituting the die portion 26 of one half 21a. Further, as shown in FIGS. 21B and 22, the tip of a boss 35 in which a through hole 36a through which a screw 33 is inserted is formed in the center of the die portion 26 of the other half 21b. A recess 36 is formed on the part. The die portion 26 can be further improved in mechanical strength by fitting the tip of the boss 35 of one half 21a and the recess 36 of the other half 21b.

  In addition, in one half 21a, as shown in FIG. 21A, the rotation support portion 57 of the lever 51 also functions as a boss, and the tip end portion of the rotation support portion 57 is shown in FIGS. The strength is reinforced by fitting into the recess 57a of the other half body 21b shown in FIG. Further, as shown in FIG. 21 (A), a boss 37 is provided on one half 21a in the portion constituting the grip portion 24, and the other half 21b shown in FIGS. 21 (B) and 22 is provided on the other half 21b. A concave portion 37 a into which the tip end portion of the boss 37 is fitted is provided. The body 21 is joined by joining a pair of left and right halves 21a, 21b with screws at three locations where the boss and the recess are fitted. Of course, the number of connecting points is not limited to the three described here, but may be four or more or two. However, it is preferable to provide the boss 35 and the recess 36 in the die portion 26 from the viewpoint of strength reinforcement.

  By the way, when the binding machine 1 performs the operation of binding the booklet 1 repeatedly, paper dust generated when the first and second blades 43 and 44 punch the booklet 1 gradually accumulates therein. The blade unit 41 is gradually difficult to slide while being smoothly guided by the slide guide portion 48. Therefore, the pair of half bodies 21a and 21b are provided with countermeasures against paper dust as follows. Hereinafter, description will be made with reference to FIGS. 4A and 4B, FIGS. 15A and 15B, FIG.

  First, in the pair of guide walls 48b and 48c constituting the guide groove 48d of the slide guide portion 48, both ends of the inner guide wall 48c are formed shorter than the outer guide wall 48b. As a result, the paper dust that has entered the guide groove 48d is discharged into the body 21 from the notches 61 and 61 formed at both ends of the guide wall 48c without collecting at both ends of the guide groove 48d. That is, the guide piece 48a of the slider 42 of the blade unit 41 engaged with the guide groove 48d can move to the end without being interrupted by paper dust.

  An area adjacent to the inner guide wall 48c is a slide area 62 where the slider 42 slides. There is also a risk that paper dust may accumulate in the slide area 62. Therefore, a concave reservoir 63 that stores paper dust is formed inside one surface 22a of the insertion opening 22 on the unit arrangement portion 25 side. The reservoir 63 has an inclined surface 64 at the bottom, and prevents paper dust from accumulating in the reservoir 63. In the slide region 62, a convex slide support portion 67 that slides and supports the blade unit 41 is formed. The slide support portion 67 is also provided with notches 68 at both ends so that paper dust does not accumulate in the slide region 62.

  Furthermore, the paper dust also enters the inside of the die part 26. The base end portion of the die portion 26 communicates with the space on the grip portion 24 side through the communication portion 65. Therefore, the paper dust in the die part 26 moves from the communication part 65 to the space on the grip part 24 side.

  In the body 21, a lever recess 66 is formed at the base portion of the lever 51 over the movement range of the lever 51, and a gap is formed between the lever 51 and the lever recess 66. The paper dust inside the body 21, that is, the paper dust generated in the unit arrangement portion 25 and the paper dust generated in the die portion 26, as shown by an arrow Z in FIG. It is gradually discharged from the gap between the lever 51 and the lever recess 66 due to vibrations generated therein. As described above, even when the binding machine 1 is repeatedly used so that the paper dust that has entered the body 21 is discharged from the gap between the lever 51 and the lever recess 66, the blade unit 41 does not operate properly. It does not occur.

1 booklet, 1a paper, 2 binding part, 3 punching hole, 4 slit, 5 cutting and raising piece, 5a tip part, 5b bending part, 11 binding machine, 21 body, 21a, 21b half body, 22 insertion slot, 22a Surface, 22b The other surface, 23 Body portion, 24 Grip portion, 25 Unit disposition portion, 26 Die portion, 26 Die hole, 27 Blade entry hole, 27a Rotating operation piece, 27b First through portion, 27c Second Through-hole, 28 Die hole, 29 Insertion number restricting protrusion, 30 Reduced portion, 30a Rib, 30b Outer region, 31 Guide portion, 31a Lowering surface, 31b Raised surface, 32 Insertion guide portion, 33 Screw, 34 Reinforcement rib , 35 boss, 35a screw hole, 36 recess, 36a through hole, 37 boss, 37a recess, 41 blade unit, 42 slider, 43 first blade, 44 second blade, 44 a Linear portion, 44b Widened end portion, 44c Window portion, 45 Extrusion cam, 45a Extrusion portion, 45b Pressed portion, 46 Rotating shaft, 47 Biasing member, 48 Slide guide portion, 48a Guide piece, 48b, 48c Guide wall 48d guide groove, 49 mounting protrusion, 51 lever, 51a locking groove, 52 rotation support hole, 53 rotation operation section, 54 mounting groove, 55 coil spring, 56 locking groove, 57 rotation support section, 57a recess , 58 collar, 61 notch, 62 slide area, 63 pool, 64 inclined surface, 65 communicating portion, 66 lever recess, 67 slide support, 68 notch

Claims (3)

A body formed with an insertion slot into which a booklet on which a plurality of sheets are stacked is inserted;
A first blade that forms a punching hole for forming a cut and raised piece in the booklet, and a slit that has a window portion into which the front end portion of the cut and raised piece is inserted and that engages the front end portion of the cut and raised piece. A second blade to be formed; and an extrusion cam for bending the cut and raised piece and inserting a tip portion into the window portion, and is arranged on one surface side of the opposing surface of the insertion port of the body. A blade unit to be installed;
The blade unit is slid into and out of the insertion port, and the second blade is pulled out from the slit in a state where the tip of the cut and raised piece is locked to the window portion of the second blade. A drive unit for locking the tip of the cut and raised piece to the slit,
The insertion port is provided with a die on the other surface facing the one surface, and a die hole into which the first and second blades and the extrusion cam enter is formed in the die,
At the opening end of the die hole, a guide portion is formed that guides the binding portion of the paper whose bent portion is bent and the leading end is locked to the slit to the drawing side of the booklet from the die hole. A binding machine characterized by being made.   The binding machine according to claim 1, wherein a reduction portion that reduces the binding portion in a thickness direction is formed at the insertion opening.   The binding machine according to claim 1, wherein the die is formed integrally with the body.

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