JP4093155B2 - Clincher device for stapler - Google Patents

Description

  The present invention relates to a clincher device for a stapler in which staples are ejected toward a binding sheet by a staple driving unit, and a staple leg penetrating the binding sheet is bent along the back surface of the binding sheet.

  As shown in FIG. 12, a conventional stapler clinching device known in the prior art is formed with a curved guide groove 31 for guiding the staple legs to bend inwardly on the upper end surface of the clincher 30. The staple legs L that penetrate the binding sheets and protrude toward the lower surface side of the binding sheets are engaged with the guide grooves 31 so that the staple legs L are guided to bend inward. The clincher 30 is arranged on the back side of the binding paper, the staple S is driven by the driver plate D from the upper surface side of the binding paper, and the staple leg L that penetrates the binding paper P and protrudes to the back side of the binding paper. Is bent inward by the guide groove 30 to form a curved loop shape at the base of both legs of the staple S so that the tip of the staple leg L comes into contact with the back surface of the binding paper P. The stapling is performed by. In such staple binding, the thickness of the staple binding portion is increased due to the curved shape formed at the base of the staple leg, and therefore, there is a problem that the stapled sheets are inclined when stacked.

Further, in many electric staplers than in the past, a movable clincher member that bends the staple legs so as to be bent from the base side by engaging with the staple legs that penetrate the binding sheets and protrude to the lower surface side of the binding sheets. Is arranged on the lower surface side of the binding paper, and after almost all of the leg portions of the staple have penetrated the binding paper, the movable clincher member is driven so that the staple leg is bent along the back surface of the binding paper. A clincher mechanism is adopted. By adopting the movable clincher mechanism in this manner, the loop shape formed at both ends of the staple can be eliminated, or the loop shape can be reduced to form the staple binding shape flat, as in the conventional clincher. It is possible to prevent the paper from being tilted even if the stapled sheets are stacked. In addition, when the staple leg that penetrates the binding paper is landed on the upper surface of the clincher and bent, the tip of the bent leg may re-penetrate from the back surface of the binding paper to the front surface. By providing a recessed area, the bending of the staple leg is controlled to prevent re-penetration of the leg tip into the binding paper.
JP-A-10-128682 JP 56-56392 A

  However, the conventional movable clincher mechanism requires a drive mechanism for driving the movable clincher member, and cannot be employed in a manual type stapler or the like that is not equipped with a drive source such as an electric motor. Further, in the electric stapler in which the staple driving operation is performed by the electric motor, the clincher mechanism is operated at an appropriate timing after the staple finishes penetrating the binding sheet by the driver driven by the electric motor. Therefore, related mechanism parts such as a cam and a link for driving the clincher mechanism by the electric motor that drives the driver are required, and further, the staple driving unit and the clincher device are separated with the conveying path of the binding paper interposed therebetween. In the electric stapler arranged in this manner, another electric motor for driving the clincher device is required, or a power transmission system component for driving the clincher mechanism by the motor of the launching unit is required. This was a factor that increased the cost of the stapler.

  The present invention solves the above-mentioned problems in the prior art, can form the staple binding shape flat, can be produced at a low cost with a simple configuration, and is also adopted in a manual type stapler having no drive source. It is an object of the present invention to provide a clincher device that can be used.

In order to solve the above-described problems, a clincher device for a stapler according to the present invention drives a staple formed in a U shape by a staple driving unit toward a binding sheet, and clinchers a leg portion of the staple penetrating the binding sheet. In a stapler configured to bend the binding sheets along the back surface of the binding sheets by the apparatus, the staple legs are inwardly engaged by engaging the clincher device with the staple legs penetrating the binding sheets. A clincher member having a guide guide surface which is bent and guided toward the upper end surface, and a metal which is disposed so as to cover the upper portion of the guide guide surface of the clincher member and whose width is narrower than the width of the guide guide surface constituted by the manufacturing of the thin plate piece, the staple legs during the induction guide surface and the thin plate piece The binding to form an inductive gap to induce substantially parallel to the back surface of the sheet, characterized in that the staple legs penetrating the binding sheets and so as to bend along said guide gap.

  According to a second aspect of the present invention, a notch portion is formed at the center of the thin plate-like piece covering the guide guide surface, and the tip end portion of the staple leg bent along the guide gap is notched. It protrudes from the portion and is brought into direct contact with the back surface of the binding paper.

According to the present invention, a clincher member having a guide guide surface formed on an upper end surface for guiding a staple leg to bend inward by engaging with a leg portion of the staple that has passed through the binding paper, and the clincher member. arranged width so as to cover the upper constitutes a clincher device with the induction guide surface metal thin plate piece which is narrower than the width of the top surface to the induction guide surface of the guide pattern surface and thin plate A guide gap is formed between the pieces to guide the staple leg substantially parallel to the back side of the binding paper, and the staple leg penetrating the binding paper is bent along the guide gap. The bending radius that penetrates the paper has a small radius of curvature and can be guided along the back side of the binding paper, thus forming a large loop at the base of the staple legs. The free clincher device flat binding shape can be obtained, at all can be provided at low cost without forming a movable portion. Further, since the metal thin plate-like piece covers the upper surface of the guide guide surface of the clincher member, the staple leg tip bent in the direction of re-penetrating the back side of the binding paper comes into contact with the thin plate-like piece and comes to the back side of the paper It moves in parallel and does not penetrate again.

According to the invention of claim 2, a notch is formed in the center of the thin plate-like piece covering the upper side of the guide guide surface, and the leading end of the staple leg bent along the guide gap is the tip. Since it protrudes from the notch and directly contacts the back side of the binding paper, even if the binding paper has a small number of sheets to be bound, the leading end of the staple leg is in close contact with the back side of the binding paper. The binding sheets can be firmly bound even after the thin plate-like pieces are extracted. Furthermore, by allowing in this manner to form a notch in a thin plate-like piece into close contact with the staple legs to the notch directly from the binding sheets, thin plate from between the staple legs and the binding sheets The piece can be easily extracted.

  It can also be used in manual staplers that do not have a drive source. For the purpose of forming a flat staple binding shape, a thin plate-like piece is arranged on the upper surface of the clincher member, and the upper end surface of the clincher member is arranged. A guide gap is formed between the formed guide guide surface and the lower surface of the thin plate-like piece to guide the staple leg substantially parallel to the back side of the binding paper, and the staple leg penetrating the binding paper is used as the guide gap. Realized by bending along the guide.

  FIG. 1 is a perspective view showing an electric stapler in which the clincher mechanism of the present invention is implemented. The electric stapler 1 is arranged along a paper conveyance path formed inside a copying machine, a printing machine, etc. A plurality of binding sheets subjected to printing processing are bound. The staple driving unit 2 disposed on one side of the paper conveyance path and ejecting staples toward the binding paper includes a magazine 5 supported between a pair of support frames 4, and an interior of the magazine 5. The staples supplied to the ejection unit 7 formed in the front portion of the cartridge 6 are moved below the ejection unit 7 by the staple driving mechanism formed in the magazine 5. It is designed to be ejected toward the binding paper placed in (1). A drive rotation member 8 is supported on the outer surface of the support frame 4, and the drive rotation member 8 is rotated by a drive motor 9 disposed adjacent to the support frame 4 to drive the staple drive mechanism. ing.

  A clincher device 3 for bending the staple leg of the staple punched out from the staple driving unit 2 and penetrating the binding sheet along the back surface of the binding sheet is driven on the opposite side of the staple driving unit 2 across the conveyance path. It is arranged opposite to the launching part 7 of the part 2. As shown in FIGS. 2 to 4, the clincher device 3 is formed with a guide guide surface 11 facing the upper surface so as to engage with the staple legs penetrating the binding sheets and guide both staple legs toward each other. The clincher member 10, the thin plate-like piece 12 disposed on the upper surface of the clincher member 10 so as to cover the upper part of the guide guide surface 11 of the clincher member 10, and the clincher member 10 and the thin plate-like piece 12 are held. It is comprised by the clincher holder 13 made to do.

  As shown in FIG. 4, the clincher member 10 is formed of a metal plate having a predetermined thickness, and engages with a staple leg penetrating the binding sheet at the upper end surface and protruding to the back side of the binding sheet, A guide guide surface 11 is formed to guide both staple legs inward. The guide guide surface 11 includes an inclined surface 14 formed so as to engage with a staple leg protruding through the binding sheet and projecting to the lower surface side of the binding sheet, and to guide the staple leg inward, and the staple leg. Curved surfaces 15 that are bent in a curved shape and guided inward are formed at both ends, and a linear flat surface 16 is formed at the center so as to connect the edges of both curved surfaces 15. Yes. The clincher member 10 in which the guide guide surface 11 as described above is formed on the upper end surface is accommodated and disposed in an accommodation recess 17 formed in the clincher holder 13 so that the guide guide surface 11 faces upward.

  A thin plate-like piece 12 formed of a thin metal plate is attached to the upper end surface of the clincher holder 13 so as to cover the center of the upper surface of the clincher holder 13, and as shown in FIG. A guide gap 18 is provided between the flat surface 16 of the guide guide surface 11 and the upper surface of the curved surface 15 to guide the leg portions of the staples between the lower surface of the thin plate-like piece 12. As shown in FIG. 5, the thin plate-like piece 12 is fixed to the clincher holder 13 together with the clincher member 10 by a bent portion 12 a formed integrally with the rear portion, and the front end edge is slightly forward of the guide guide surface 11. It is arranged to protrude. As shown in FIG. 7, the width of the thin plate-like piece 12 is narrower than the width of the guide guide surface 11, and the thin plate-like piece 12 is above the inclined surfaces 14 at both ends of the guide guide surface 11. Therefore, when the binding sheet is placed on the upper surface of the clincher holder 13 and staples are driven out from the staple driving unit 2 toward the binding sheet, the staple legs penetrating the binding sheet are guided by the guide. It is possible to land on the inclined surfaces 14 at both ends of the surface 11. In addition, as shown in FIG. 3, guiding curved portions 12 b and 12 b are provided on the thin plate-like piece 12 facing the inclined surface 14 and the curved surface 15 of the clincher member 10. The guide bending portions 12b and 12b serve to guide the tip of the leg to the guide gap 18 when the staple leg L that has been punched is bent by the inclined surface 14 of the clincher member 10.

  As shown in FIGS. 4 and 5, the housing recess 17 formed in the clincher holder 13 that houses the plate-like clincher member 10 in the vertical direction has a front wall 17 a that forms the recess. Is formed lower than the position of the guide guide surface 11 of the clincher member 10, whereby the leg portion of the staple bent along the guide guide surface 11 is extracted forward from the guide guide surface 11 of the clincher member 10. To be able to. The clincher holder 13 to which the clincher member 10 and the thin plate-like piece 12 are attached by screws 19 is formed on the clincher holder 13 on the opposite side across the paper conveyance path so as to face the ejection portion 7 of the staple driving unit 2. It attaches with a screw etc. via the attachment hole 13a.

  The operation state of the clincher device 3 according to the above embodiment will be described below with reference to FIGS. As shown in FIG. 7, after the binding paper P is disposed between the staple driving unit 2 and the clincher device 3, the staple driving unit 2 is moved in the direction of the clincher device 3 to transfer the binding paper P to the staple driving unit 2. And the clincher device 3. The thin plate-like piece 12 attached to the upper surface of the clincher holder 13 is pressed from the upper surface by parts such as a magazine and a face plate that form the ejecting portion 7 through the binding paper placed on the upper surface. From this state, the staple plate S is ejected from the ejecting unit 7 toward the binding paper P by the driver plate D of the staple driving unit 2, and the leading ends of the staple legs L penetrate the binding paper P.

  As shown in FIG. 8A, both legs L of the staple S that penetrates the binding paper and protrudes to the back side of the binding paper are inclined surfaces at both ends of the guide guide surface 11 formed on the clincher member 10. 14 is engaged inward and guided inward, and is guided inwardly by the curved surface 15 formed following the inclined surface 14 and the guiding curved portion 12 b of the thin plate-like piece 12. Further, as the driving of the driver plate D causes the staple S to be driven, the leading end of the staple leg L guided along the curved surface 15 of the guide guide surface 11 is guided slightly upward, as shown in FIG. As shown in FIG. 8, when the leading edge of the staple leg L is engaged with the back side of the thin plate-like piece 12 and is guided along the back side of the thin plate-like piece 12, and the staple S is further driven, FIG. As shown in FIG. 8C, when the staple leg L is guided along the back surface of the thin plate-shaped piece 12 and the staple S is driven out to the final position by the driver plate D as shown in FIG. Are bound so that the thin plate-like pieces 12 are held by the staple legs L on the back side of the binding paper P.

  Then, by pulling out the binding paper P for which the staple binding is completed, the thin plate-like piece 12 is extracted from between the staple leg L and the binding paper P, and the staple leg L as shown in FIG. However, stapling is completed in a shape bent substantially flat along the back surface of the binding paper P. Since the thin plate-like piece 12 is formed of a thin metal plate having a thickness of about 0.2 mm, for example, the thin plate-like piece 12 bound together between the staple leg L and the binding paper P is extracted. Even so, the binding state of the binding paper P does not change.

  As described above, according to the present invention, the thin plate-like piece 12 is disposed above the guide guide surface 11 formed on the upper end surface of the clincher member 10, and the guide guide surface 11 and the back surface of the thin plate-like piece 12 are arranged. A guide gap 18 for guiding the staple legs L is formed between the staple legs L, and the staple legs L penetrating the binding paper P are guided along the guide gap 18 to be bent. It becomes possible to bend in a flat shape along the back surface of the binding paper P. Further, the front wall 17a of the housing recess 17 that houses the clincher member 10 is formed to be lower than the guide guide surface 11, and the thin plate-like piece 12 is guided from the rear side of the clincher holder 13 to the front side. Since it is formed so as to cover the upper surface of the guide surface 11, the thin sheet-like piece 12 can be extracted from between the staple legs L and the binding paper P by moving the binding paper P after the staple binding is completed. In particular, it is suitable for a stapler built in a copying machine or the like in which the staple driving unit 2 and the clincher device 3 are arranged along the sheet conveyance path.

  10 and 11 show a clincher device according to another embodiment, and a thin plate-like piece 20 is provided above the clincher member 10 having the guide guide surface 11 formed on the upper end surface in the same manner as the above-described embodiment. 11, a guide gap 21 for guiding the leg L of the staple S is formed between the upper surface of the guide guide surface 11 and the lower surface of the thin plate-like piece 20. Further, in this embodiment, a notch 22 is formed at the center of the front edge of the thin plate-like piece 20, and as shown in FIG. The shape piece 20 is guided so as to protrude upward from the notch 22 and to be in direct contact with the back surface of the binding paper P. As a result, for example, even a binding sheet with a small number of sheets to be bound can be bent so that the front end portion of the staple leg L is brought into close contact with the binding sheet P, and the binding sheet P can be bound firmly. Further, the notched portion 22 is formed in the thin plate-like piece 20 in this manner so that the staple leg L is brought into close contact with the binding paper directly from the notched portion 22, so that the staple leg L and the binding paper P are interposed from each other. The thin plate-like piece 20 can be easily extracted.

  In any of the above-described embodiments, the thin plate-like pieces 12 and 20 that are joined together with the binding paper P are extracted from between the binding paper P and the staple legs L by moving the binding paper P forward. However, the thin plate-like pieces 12 and 20 are constituted by thin metal plates having elasticity, and the front end portions of the thin plate-like pieces 12 and 20 are elastically deformed upward by lifting the binding paper P after the staple binding. Thus, the thin plate-like pieces 12 and 20 may be extracted from between the staple legs L and the binding paper P. Also. The thin plate-like pieces 12 and 20 are configured to be supported by a clincher holder or the like so that the thin plate-like pieces 12 and 20 can be rotated at the rear edge portion, and the binding sheet P after the staple binding is moved upward to rotate the thin plate-like pieces 12 and 20. It may be moved to be pulled out from between the staple leg L and the binding paper P. In this way, the thin plate-like pieces 12 and 20 are held elastically or pivotably, and the binding sheet after the staple binding is finished is moved upward, whereby the thin plate-like pieces are bound between the binding sheet and the staple legs. By pulling out from the space, it can be used for a manual type stapler used on a desk.

  The clincher device for a stapler according to the present invention is housed in a copying machine, a printing machine or the like as in the above embodiment, and in addition to electric staples in which staples are driven out toward binding sheets by an electric motor. The present invention can also be implemented in an electric stapler that is not housed in a printing machine or a printing machine and is used alone on a desk, or a manual type stapler that does not include any power drive source such as an electric motor.

The perspective view which shows the electric stapler concerning the Example of this invention. Top view of the clincher device of the electric stapler of FIG. Sectional view on the AA line in FIG. Front view of the same clincher device as FIG. Sectional drawing on the BB line in FIG. Perspective view showing component configuration of clincher device FIG. 3 is a cross-sectional view similar to FIG. 3 showing a state immediately before staples are driven into binding paper. The operation state in which the staple leg is bent in the guide groove is shown. (A) is a state in which the leading end of the staple leg penetrating the binding sheet is guided inward by the inclined surface, and (b) is the staple leg. A state in which the staple leg is guided along the arcuate surface, (c) shows a state in which the tip end portion of the staple leg is guided along the back surface of the thin plate-like piece, and (d) shows a state in which the staple binding is completed. Sectional view showing the binding paper that has been stapled and extracted from the clincher device The perspective view which shows the thin plate-shaped piece concerning another Example of this invention. Sectional drawing which shows the state which the staple binding by the Example of FIG. 10 was completed Sectional drawing which shows the state which the staple binding by the conventional clincher apparatus was completed

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Electric stapler 3 Clincher apparatus 10 Clincher member 11 Guide guide surface 12, 20 Thin plate-shaped piece 18, 21 Guide gap 22 Notch

Claims (2)

In the stapler, the staple driving unit drives the staples toward the binding sheets, and the binding sheets are bound by bending the staple legs penetrating the binding sheets along the back surface of the binding sheets by the clincher device. A clincher member having a guide guide surface formed on the upper end surface for guiding the staple leg to bend inward by engaging the clincher device with the staple leg penetrating the binding paper, and guiding the clincher member width is disposed so as to cover the upper guide surface is constituted by the said induction guide surface metal thin plate piece which is narrower than the width of the staple legs during the induction guide surface and the thin plate piece Staples that pass through the binding paper by forming a guide gap that guides the section almost parallel to the back side of the binding paper Clincher device for a stapler, wherein a leg has to be bent along said guide gap.   A notch is formed in the center of the thin plate-like piece covering the guide guide surface, and the front end of the staple leg bent along the guide gap protrudes from the notch and the back side of the binding paper The clincher device for a stapler according to claim 1, wherein the clincher device is abutted directly against the stapler.

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