JP2018069632A - Stapler - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a stapler capable of suppressing occurrence of noise at an operation of cutting a staple end.SOLUTION: A stapler comprises a cut part 30A for cutting staple ends 12A of a staple penetrating a sheet. The cutting part 30A comprises: a pair of cutting members 301A, 301Afor cutting the staple ends 12A; a pair of links 307A, 307Afor driving the pair of cutting members 301A, 301A; and a pair of load application members 311A, 311Afor applying loads to the pair of cutting members 301A, 301Athrough the pair of links 307A, 307A.SELECTED DRAWING: Figure 4

Description

  The present invention relates to a stapler that binds a plurality of sheets with a needle called a staple.

  In the electric stapler used in the post-processing device, a needle having a length of a needle foot capable of binding the maximum possible number of sheets is stored. A technique for cutting and binding the paper has been proposed.

  Such a stapler has a configuration in which a shearing force is applied to the needle foot and cut by rotating the pair of cutting members (see, for example, Patent Document 1). In addition, there is a configuration in which a shear force is applied to the needle foot and cut by an advance / retreat operation of a single cutting member (see, for example, Patent Document 2).

JP 2005-119246 A JP-A-63-99904

  In recent years, an electric stapler used for an aftertreatment device has been required to be quiet. However, in the conventional stapler, when the load due to the shearing force is released at the timing when the cutting of the needle foot is finished, a sudden load fluctuation occurs. The moving parts have dimensional tolerances, and due to the rattling between the parts due to the tolerances, vibrations occur due to sudden rotation of the cutting member due to load fluctuations, release of deflection or twisting deformed due to reaction force, etc. Occurs, and the sound accompanying vibration is generated.

  The present invention has been made to solve such a problem, and an object of the present invention is to provide a stapler capable of suppressing the generation of sound in the cutting operation of the needle foot.

  In order to solve the above-described problems, the present invention includes a needle launching unit that strikes a needle and penetrates the paper, a needle storage unit that is attached to the needle launching unit and stores a needle before being fired from the needle launching unit, and a paper It has a cutting part that cuts the needle foot of the needle that penetrates the paper and a binding part that folds the needle foot of the needle that penetrates the paper and binds the paper, and the cutting part cuts the needle foot and a cutting member that cuts the needle foot It is a stapler provided with the load provision member which applies a load to a cutting member by operation to perform.

  The stapler includes a stapler that binds the paper with a needle, and performs post-processing on the paper on which the image has been formed. The stapler includes a needle ejection unit that ejects the needle and penetrates the paper, and a needle ejection unit. A staple storage unit for storing the needles that are attached and before being ejected from the needle launching unit, a cut unit that cuts the needle foot of the needle that has penetrated the paper, and a binding that binds the paper by folding the needle foot of the needle that has penetrated the paper. The cutting unit is a stapler suitable for a post-processing apparatus including a cutting member that cuts the needle foot and a load applying member that applies a load to the cutting member by the operation of cutting the needle foot.

  Furthermore, the stapler is suitable for an image forming system that includes an image forming apparatus that forms and outputs an image on a sheet and the above-described post-processing apparatus that is connected to the image forming apparatus and performs post-processing on the sheet.

  In the present invention, the needle foot of the needle penetrating the paper is cut by the operation of the cutting member in a state where a load is applied to the cutting member. When the cutting of the needle foot is completed, the load applied to the cutting member varies. However, when the load is applied by the load applying member, the rapid load variation is suppressed.

  In the present invention, by suppressing the rapid load fluctuation at the time of cutting the needle foot, it is possible to suppress the vibration of the parts accompanying the load fluctuation and to suppress the generation of the sound accompanying the vibration.

It is a side view which shows an example of the stapler of this Embodiment. It is a principal part side view which shows an example of the stapler of this Embodiment. It is explanatory drawing which shows an example of the operation | movement which binds a paper with a needle | hook. It is a block diagram which shows an example of the cut part of this Embodiment. 1 is a configuration diagram illustrating an outline of an image forming system according to an embodiment. It is a block diagram which shows an example of the post-processing apparatus of this Embodiment. It is explanatory drawing which shows an example of operation | movement of the cut part of this Embodiment. It is a block diagram which shows the modification of the cut part of this Embodiment. It is a block diagram which shows the other modification of the cut part of this Embodiment.

  Hereinafter, embodiments of a stapler, a post-processing measure including a stapler, and an image forming system including a post-processing device according to the present invention will be described with reference to the drawings.

<Configuration example of stapler according to this embodiment>
FIG. 1 is a side view showing an example of a stapler according to the present embodiment, and FIG. 2 is a side view of a main part showing an example of the stapler according to the present embodiment. FIG. 3 is an explanatory diagram illustrating an example of an operation of binding sheets with a needle.

  First, the operation of closing the paper P with the stapler 1A will be described with reference to FIG. As shown in FIG. 3A, a needle 10A called a staple is bent at both ends of a needle crown 11A in one direction to form a needle foot 12A. That is, the needle 10A is formed in a substantially U shape.

  In the needle 10A, when the needle crown 11A is pressed, the needle foot 12A penetrates the paper P and the needle crown 11A contacts the paper P as shown in FIG. As shown in FIG. 3C, the needle 10A in which the needle foot 12A has penetrated the paper P is cut as the cut needle 13A by surplus portions of the needle feet 12A that overlap each other when the needle foot 12A is bent.

  As shown in FIG. 3D, the needle 10A in which the needle foot 12A is cut to a predetermined length is folded, and the paper P is bound by the needle 10A.

  Next, the configuration of the stapler 1A according to the present embodiment will be described with reference to the drawings. The stapler 1A cooperates with the needle launching unit 2A for supplying and firing the needle 10A, and the needle launching unit 2A to cut the needle foot 12A of the needle 10A and bend the needle foot 12A, and to feed the paper P. A binding unit 3A for binding with the needle 10A is provided. Further, the stapler 1A includes a sheet clamping unit 4A that sandwiches a bundle of sheets P between the punching unit 2A and the binding unit 3A between the staple driving unit 2A and the binding unit 3A.

  In the following description, the side on which the sheet clamping unit 4A is provided is the front side of the stapler 1A, and the side opposite to the side on which the sheet clamping unit 4A is provided is the rear side. The side on which the binding unit 3A is provided is the upper side of the stapler 1A, and the side on which the needle punching unit 2A is provided is the lower side of the stapler 1A.

  The needle ejection unit 2A is an example of a needle ejection unit, and a needle cartridge 100A that is a needle storage unit in which the needle 10A is stored is detachably attached. The needle punching unit 2A includes a feeding portion 21A for feeding the needle 10A from the needle cartridge 100A and a punching portion 22A for driving the needle 10A into the paper P.

  In this example, the needle 10A is provided as a needle sheet in which a plurality of linear needles 10A are integrated by bonding, and the plurality of needle sheets are stacked and stored in the needle cartridge 100A. As shown in FIG. 3 (a) and the like, the punching unit 22A substantially moves the second or third needle 10A as shown in FIG. 3 (a) in conjunction with the operation of driving the most advanced needle 10A in the needle sheet conveyance direction. Molded into a letter shape.

  The binding unit 3A is an example of a binding portion, and a cutting portion 30A that cuts the needle foot 12A of the needle 10A that has penetrated the paper P by a predetermined length, and a needle that has penetrated the paper P and has been cut to a predetermined length. A clincher portion 31A that bends the needle foot 12A of 10A in the direction of the paper P is provided.

  The paper clamping unit 4A is opened in the three directions of the front side of the stapler 1A and the left and right sides so that the binding position Pi of the paper P by the needle 10A can be positioned between the punching unit 22A and the clincher unit 31A. Shape.

  The sheet clamping unit 4A includes a first clamping unit 40A in the needle punching unit 2A, and a second clamping unit 41A in the binding unit 3A so as to face the first clamping unit 40A. The stapler 1A moves between the first clamping unit 40A and the second clamping unit 41A by rotating the binding unit 3A with the shaft 32A as a fulcrum and moving the binding unit 3A closer to the needle punching unit 2A. The paper P is held between the two.

  The sheet clamping unit 4A includes a sheet position regulating unit 42A that regulates the position in the insertion direction of the sheet P indicated by the arrow a. The sheet position restricting portion 42A protrudes between the first sandwiching portion 40A and the second sandwiching portion 41A on the back side of the sheet sandwiching portion 4A with respect to the insertion direction of the sheet P indicated by the arrow a. As a result, the insertion of the paper P inserted into the paper clamping unit 4A from the paper position regulating unit 42A is restricted.

  The stapler 1A includes a drive unit 5A that opens and closes the needle launch unit 2A and the binding unit 3A, and drives the feeding unit 21A and the launch unit 22A of the needle launch unit 2A, and the cut unit 30A and the clincher unit 31A of the binding unit 3A. .

  The drive unit 5A includes a cam 51A driven by a motor 50A provided in the needle launching unit 2A, and a link (not shown) that transmits the operation of the cam 51A to each unit.

  The stapler 1A relatively moves in a direction in which the staple driving unit 2A and the binding unit 3A are separated from each other when the operation of the cam 51A is transmitted to the binding unit 3A via a link or the like. In this example, the binding unit 3 </ b> A moves in a direction in which the binding unit 3 </ b> A is separated from and contacted with the needle punching unit 2 </ b> A by a rotation operation with the shaft 32 </ b> A as a fulcrum.

  In the stapler 1A, the cam 51A rotates in one direction, the binding unit 3A moves in a direction approaching the needle launch unit 2A, and the paper P is clamped by the paper clamping unit 4A at a predetermined timing. Further, the stapler 1A moves the cam unit 51A in one direction and moves the binding unit 3A away from the needle punching unit 2A at a predetermined timing to release the paper P from the paper holding unit 4A. To do.

  Further, in the stapler 1A, the operation of the cam 51A is transmitted to the feeding portion 21A and the striking portion 22A via a link or the like, and the cam 51A rotates in one direction so that the needle 10A stored in the needle cartridge 100A is fed. The most advanced one of the needles 10A fed out by 21A is driven into the paper P clamped by the paper clamping unit 4A by the punching unit 22A, and the needle foot 12A of the needle 10A is penetrated through the paper P. Further, the second or third needle 10A is formed into a substantially U-shape as shown in FIG.

  Further, in the stapler 1A, the operation of the cam 51A is transmitted to the cut part 30A and the clincher part 31A via a link or the like, and the cam 51A rotates in one direction so that the needle foot 12A of the needle 10A penetrating the paper P is moved. The cut portion 30A is cut to a predetermined length, and the needle foot 12A of the needle 10A cut to the predetermined length is bent by the clincher portion 31A.

  The stapler 1A includes a cut needle storage portion 6A that stores the cut needle 13A cut by the cut portion 30A. The cut needle storage portion 6A is detachably attached to the stapler 1A on the rear side of the stapler 1A opposite to the side on which the sheet clamping portion 4A is provided.

  FIG. 4 is a configuration diagram illustrating an example of the cut portion of the present embodiment. Next, the cut portion 30A of the present embodiment will be described with reference to the drawings.

The cut portion 30A includes an introduction portion 300A _L , 300A _{R of} the needle foot 12A penetrating the paper P and a pair of cutting members 301A _L , 301A _R for cutting the needle foot 12A introduced into the introduction portion 300A _L , 300A _R. Prepare.

Cut portion 30A is the support plate 303A, with the convex portion 304A which projects a narrow predetermined width than the width of the needle crown 11A of the needle 10A, includes a receiving unit 304A _L on one side surface of the protrusion 304A, the other side comprising a receiving portion 304A _R in.

One cutting member 301A _L is rotatably attached to the upper surface of the support plate 303A with a shaft 306A _L as a fulcrum, and includes a blade portion 305A _L at a front end facing one receiving portion 304A _L.

The other cutting member 301A _R is attached to the upper surface of the support plate 303A so as to be rotatable about a shaft 306A _R, and includes a blade part 305A _R at the front end facing the other receiving part 304A _R.

In the stapler 1A, the pair of needle feet 12A of the needle 10A is cut by receiving a shearing force by the movement of the pair of cutting members 301A _L and 301A _R from the outside to the inside with respect to the needle feet 12A. As a result, so-called barbs generated by shearing, protruding parts called burr, burr, burr, and the like are formed inside the pair of needle feet 12A. By bending the needle foot 12A cut in this way toward the inside by the clincher portion 31A, the protruding portion faces the paper P side.

In a state where the cutting member 301A _L is moved to the standby position, the support plate and one of the receiving portions 304A _L formed in 303A, the receiving portion 304A _L opposed to one of the cutting member 301A _L blade portion of the 305A _L A groove portion through which the needle foot 12A passes is formed. The introduction part 300A _L is constituted by a groove part between the receiving part 304A _L and the blade part 305A _L.

Similarly, in a state in which the cutting member 301A _R is moved to the standby position, the other receiving portion 304A _R formed on the support plate 303A and the blade portion 305A of the other cutting member 301A _R facing the receiving portion 304A _{R. A} groove portion through which the needle foot 12 </ b> A passes is formed between _R. The introduction part 300A _R is constituted by a groove part between the receiving part 304A _R and the blade part 305A _R.

The cut portion 30A includes a pair of links 307A _L and 307A _R that drive the pair of cutting members 301A _L and 301A _R. Link 307A _L in one example of a driving force transmitting member, rotatably shaft 308A _L as a fulcrum, attached to a housing (not shown) of the stapler 1A. The link 307A _L includes an engaging portion 310A _L that engages with the engaged portion 309A _L provided on the cutting member 301A _L on one end side that is displaced by a rotational operation with the shaft 308A _L as a fulcrum.

The link 307A _R is an example of a driving force transmission member, and is attached to a housing (not shown) of the stapler 1A so as to be rotatable about the shaft 308A _R. The link 307A _R includes an engaging portion 310A _R that engages with an engaged portion 309A _R provided on the cutting member 301A _R on one end side that is displaced by a rotational operation with the shaft 308A _R as a fulcrum.

The link member 307A _L is driven by the motor 50A shown in FIG. 1 and the cutting member 301A _L moves in a direction in which the blade part 305A _L approaches and separates from the receiving part 304A _L by a rotation operation with the shaft 306A _L as a fulcrum. To do.

When the link 307A _L rotates in the direction of the arrow v1, the cutting member 301A _L moves to the cutting end position by the rotation operation in the direction in which the blade portion 305A _L approaches the receiving portion 304A _L , and the link 307A _L moves to the arrow direction. by rotating the v2 direction, it moves to the standby position by rotation in a direction away against the blade portion 305A _L receives unit 304A _L.

In the cutting member 301A _R , the link 307A _R is driven by the motor 50A shown in FIG. 1 in conjunction with the link 307A _L, and the blade 305A _R is moved with respect to the receiving portion 304A _R by the rotation operation about the shaft 306A _R. Move in the direction toward and away from.

Cutting member 301A _R, by the link 307A _R rotates in the arrow v1 direction, to move the cutting end position at the rotation of the direction of approach to the blade portion 305A _R is receiver 304A _R, link 307A _R arrow By rotating in the v2 direction, the blade portion 305A _R moves to the standby position by a rotation operation in a direction away from the receiving portion 304A _R.

The cut portion 30A includes a pair of load applying members 311A _L and 311A _R that apply loads to the cutting members 301A _L and 301A _R. In this example, the load applying members 311A _L and 311A _R are constituted by tension coil springs.

Link 307A _L is provided with a locking portion 312A _L distally from the engaging portion 310A _L. Load applying member 311A _L, one end of the tension coil spring is engaged with the engaging portion 312A _L of the link 307A _L, it is locked to the locking shaft 313A _L other end is provided in the casing (not shown) of the stapler 1A .

The link 307A _R includes a locking portion 312A _R on the distal end side of the engaging portion 310A _R. Load applying member 311A _R, one end of the tension coil spring is engaged with the engaging portion 312A _R of the link 307A _R, is locked to the locking shaft 313A _R other end is provided in the casing (not shown) of the stapler 1A .

Cut portion 30A in a state where the cutting member 301A _L is at the standby position, the load applying member 311A _L is extended a predetermined amount, a state in which load is applied to the cutting member 301A _L through the link 307A _L. Further, in a state where the cutting member 301A _R is at the standby position, the load applying member 311A _R is stretched a predetermined amount, a state in which load is applied to the cutting member 301A _R through the link 307A _R.

Cut portion 30A is a cutting member 301A _L is moved to the cutting end position from the standby position, for cutting the needle foot 12A, the link 307A _L rotates in the arrow v1 direction, the load applying member 311A _L is extended. Accordingly, a load opposite to the force for moving the link 307A _L and the cutting member 301A _L to the cutting end position is applied to the link 307A _L and the cutting member 301A _L by the load applying member 311A _L.

Further, the cut portion 30A is a cutting member 301A _R is moved to the cutting end position from the standby position, for cutting the needle foot 12A, the link 307A _R rotates in the arrow v1 direction is stretched load applying member 311A _R is . Accordingly, a load opposite to the force for moving the link 307A _R and the cutting member 301A _R to the cutting end position is applied to the link 307A _R and the cutting member 301A _R by the load applying member 311A _R.

<Configuration example of image forming system and post-processing apparatus>
FIG. 5 is a configuration diagram illustrating an outline of the image forming system according to the present embodiment, and FIG. 6 is a configuration diagram illustrating an example of a post-processing apparatus according to the present embodiment.

  An image forming system 500A according to the present embodiment includes an image forming apparatus 501A and a post-processing apparatus 502A capable of at least one type of processing. The image forming apparatus 501A forms and outputs an image on a sheet P fed from a sheet feeding unit (not shown) inside or outside the apparatus. In this example, the image forming apparatus 501A forms an image on the sheet P by forming an electrostatic latent image by scanning exposure, developing the electrostatic latent image by toner, transferring the toner to the sheet, and fixing.

  The post-processing device 502A of the present embodiment includes a stapler 1A in the binding unit 503A. The binding unit 503A includes a stacking unit 504A that stacks the sheets P output from the image forming apparatus 501A.

  FIG. 6 is a view of the binding unit 503A of the post-processing device 502A as viewed from above. As shown in FIG. 6, the stapler 1A has a first position Pp1 for binding one corner of the paper P stacked on the stacking unit 504A, and a second position for binding an arbitrary position along the side PL of the paper P. Pp2 is moved to a third position Pp3 where the other corner of the paper P is bound by a moving unit (not shown). In this example, the first position Pp1 also serves as a reference position that is a home position (HP). In this example, the attachment / detachment of the cut needle storage unit 6A is performed by moving the stapler 1A to the first position Pp1 and opening the door 505A.

<Example of effects of the stapler according to the present embodiment>
FIG. 7A, FIG. 7B, and FIG. 7C are explanatory diagrams showing an example of the operation of the cut portion of the present embodiment. Hereinafter, the embodiment of the present embodiment will be described with reference to each drawing. The operation of the stapler will be described.

  In the operation of binding the paper P with the stapler 1A, as shown in FIG. 2, the paper P is held between the first holding portion 40A of the needle punching unit 2A and the second holding portion 41A of the binding unit 3A. One needle 10A molded from a needle sheet (not shown) is separated and launched by a launching portion 22A of the needle launching unit 2A shown in FIG. As a result, the needle 10 </ b> A before being cut passes through the paper P.

Excess portion of one of the needle foot 12A which penetrates the paper P, as shown in FIG. 7 (a), is introduced into the introduction portion 300A _L of the cut portion 30A, the excess portion of the other needle foot 12A, the introduction portion 300A Introduced into _R.

When the operation through which the paper P come up with needle 10A is completed, by rotating the link 307A _L arrow v1 direction by driving the motor 50A, and the engaging portion 310A _L of the link 307A _L, the cutting member 301A _L the engagement between the engaging portion 309A _L, with rotation of the arrow w1 direction with the fulcrum shaft 306A _L, to move the cutting member 301A _L to the cutting end position from the standby position.

Further, by rotating the link 307A _R arrow v1 direction by driving the motor 50A, and the engaging portion 310A _R of the link 307A _R, by the engagement of the engaged portion 309A _R of the cutting member 301A _R, shaft 306A _The cutting member 301A _R is moved from the standby position to the cutting end position by the rotation operation in the arrow w1 direction with _R as a fulcrum.

When the link 307A _L rotates in the arrow v1 direction, as shown in FIG. 7 (b), tensile load applying member 311A _L is a coil spring is extended. As a result, a load opposite to the force for moving the cutting member 301A _L and the link 307A _L to the cutting end position is applied to the cutting member 301A _L and the link 307A _L by the load applying member 311A _L.

Further, in operation of the cutting member 301A _L is moved to the cutting end position from the standby position, one of the needle foot 12A contained in the introduction 300A _L is the blade portion 305A _L and the receiving portion 304A _L of the cutting member 301A _L Sandwiched between them. Thus, the load due to the reaction force of the shear force to be cut the needle foot 12A is subjected to the cutting member 301A _L and link 307A _L. The load due to the load applying member 311A _L and the load due to the reaction force of the shearing force are forces in the same direction.

When the link 307A _R rotates in the arrow v1 direction, as shown in FIG. 7B, the load applying member 311A _R that is a tension coil spring is extended. As a result, a load opposite to the force for moving the cutting member 301A _R and the link 307A _R to the cutting end position is applied to the link 307A _R and the cutting member 301A _R by the load applying member 311A _R.

Further, when the cutting member 301A _R is moved from the standby position to the cutting end position, one needle foot 12A in the introduction part 300A _R is connected to the blade part 305A _R and the receiving part 304A _R of the cutting member 301A _R. Sandwiched between them. Thus, the load due to the reaction force of the shear force to be cut the needle foot 12A is subjected to the cutting member 301A _R and link 307A _R. The load due to the load applying member 311A _R and the load due to the reaction force of the shearing force are forces in the same direction.

As shown in FIG. 7 (c), when the needle foot 12A is cut by receiving shear force, the load due to the reaction force of the shear forces, to miss the cutting member 301A _L and link 307A _L. However, the load applied by the load applying member 311A _L is applied to the cutting member 301A _L and the link 307A _L.

Thus, even when the load caused by shear force is released, a sudden load fluctuation is suppressed, a rapid rotation and the cutting member 301A _L and the link 307A _L, sharp shapes, such as bending and torsion which is deformed by the reaction force Recovery is suppressed. Thus, rapid rotation and the cutting member 301A _L and the link 307A _L, occurrence of vibration due to rapid recovery of deformed shape by receiving a reaction force is suppressed, generation of noise due to the vibration is suppressed.

Further, as shown in FIG. 7 (c), when the needle foot 12A is cut by receiving shear force, the load due to the reaction force of the shear forces, to miss the cutting member 301A _R and link 307A _R. However, the load by the load applying member 311A _R is exerted on the cutting member 301A _R and link 307A _R.

Thus, even when the load caused by shear force is released, a sudden load fluctuation is suppressed, a rapid rotation and the cutting member 301A _R and link 307A _R, rapid restoration of the shape which is deformed by the reaction force is suppressed The Thus, rapid rotation and the cutting member 301A _R and link 307A _R, generation of sound caused by the rapid recovery of the shape which is deformed by the reaction force is suppressed.

<Modification of the stapler of the present embodiment>
FIG. 8 is a configuration diagram showing a modification of the cut portion of the present embodiment. The cut portion 30B of the modified example, instead of the load application member by the coil spring tension comprises load application by an elastic member such as rubber tube member 311B _L, the 311B _R.

The load applying member 311B _L is inserted between a locking portion 312A _L provided at the tip of the link 307A _L and a support portion 314B provided in a housing (not shown). Load applying member 311B _R includes a locking portion 312A _R provided at the tip of the link 307A _R, placed between the support portions 314B provided on the casing (not shown).

Cut portion 30B in a state where the cutting member 301A _L is at the standby position, the load applying member 311B _L is crushed predetermined amount, a state in which load is applied to the cutting member 301A _L through the link 307A _L. Further, in a state where the cutting member 301A _R is at the standby position, the load applying member 311B _R is crushed predetermined amount, a state in which load is applied to the cutting member 301A _R through the link 307A _R.

When the operation through which the paper P come up with needle 10A is completed, by rotating the link 307A _L arrow v1 direction by driving the motor 50A, ends cut from the standby position by rotating the cutting member 301A _L in the arrow w1 direction Move to position. Further, by rotating the link 307A _R in the arrow v1 direction by driving the motor 50A, the cutting member 301A _R is rotated in the arrow w1 direction and moved from the standby position to the cutting end position.

When the link 307A _L rotates in the direction of the arrow v1, the load applying member 311B _L that is a rubber tube is crushed. By the reaction force of this crushing, a load in the opposite direction to the force for moving the cutting member 301A _L and link 307A _L to the cutting end position, are subjected to the link 307A _L and the cutting member 301A _L by a load applying member 311B _L. The load due to the reaction force of the shear force to be cut the needle foot 12A is subjected to the cutting member 301A _L and link 307A _L.

When the link 307A _R rotates in the arrow v1 direction, crushed load applying member 311B _R is a rubber tube. By the reaction force of this crushing, a load in the opposite direction to the force for moving the cutting member 301A _R and links 307A _R to the cutting end position, are subjected to the link 307A _R and the cutting member 301A _R by the load applying member 311A _R. The load due to the reaction force of the shear force to be cut the needle foot 12A is subjected to the cutting member 301A _R and link 307A _R.

When the needle foot 12A is cut by receiving shear force, the load due to the reaction force of the shear forces, to miss the cutting member 301A _L and link 307A _L. However, the load applied by the load applying member 311B _L is applied to the link 307A _L and the cutting member 301A _L.

Thus, even when the load caused by shear force is released, a sudden load fluctuation is suppressed, a rapid rotation and the cutting member 301A _L and the link 307A _L, rapid restoration of the shape which is deformed by the reaction force is suppressed The Thus, rapid rotation and the cutting member 301A _L and the link 307A _L, generation of sound due to rapid recovery of deformed shape by receiving a reaction force is suppressed.

Further, when the needle foot 12A is cut by receiving shear force, the load due to the reaction force of the shear forces, to miss the cutting member 301A _R and link 307A _R. However, the load by the load applying member 311B _R is exerted on the cutting member 301A _R and link 307A _R.

Thus, even when the load caused by shear force is released, a sudden load fluctuation is suppressed, a rapid rotation and the cutting member 301A _R and link 307A _R, rapid restoration of the shape which is deformed by the reaction force is suppressed The Thus, rapid rotation and the cutting member 301A _R and link 307A _R, generation of sound caused by the rapid recovery of the shape which is deformed by the reaction force is suppressed.

FIG. 9 is a configuration diagram showing another modification of the cut portion of the present embodiment. In the cut portion 30C of another modification, a load applying member 311C using a compression coil spring is used instead of a load applying member using the extension of a tension coil spring or a load applying member using a compressive deformation of an elastic member such as a rubber tube. _L, equipped with a 311C _R.

Load applying member 311C _L is attached to the shaft 306A _L of the cutting member 301A _L, it is pressed against the surface direction of the cutting member 301A _L to the support plate 303A. Load applying member 311C _R is attached to the shaft 306A _R of the cutting member 301A _R, is pressed against the surface direction of the cutting member 301A _R to the support plate 303A.

The cut portion 30C is in a state in which the load applying member 311C _L is crushed and bent by a predetermined amount, and a load is applied regardless of the position of the cutting member 301A _L. Further, the deflection load applying member 311C _R is crushed predetermined amount, a state in which the loaded regardless of the position of the cutting member 301A _R.

When the operation through which the paper P come up with needle 10A is completed, by rotating the link 307A _L arrow v1 direction by driving the motor 50A, to move the cutting member 301A _L to the cutting end position from the standby position. Further, by rotating the link 307A _R in the direction of the arrow v1 by driving the motor 50A, the cutting member 301A _R is moved from the standby position to the cutting end position.

By link 307A _L rotates in the arrow v1 direction, the cutting member 301A _L is rotated in the arrow w1 direction, the load due to the reaction force of the shear force to be cut the needle foot 12A is, the cutting member 301A _L and the link 307A _L Hung on. Further, during the operation in which the cutting member 301A _L rotates in the direction of the arrow w1, a load is always applied by the load applying member 311C _L.

Link 307A _R is by rotating the arrow v1 direction, the cutting member 301A _R is rotated in the arrow w1 direction, the load due to the reaction force of the shear force to be cut the needle foot 12A is, the cutting member 301A _R and links 307A _R Hung on. Further, during operation of the cutting member 301A _R is rotated in the arrow w1 direction, always Loaded by the load applying member 311C _R.

When the needle foot 12A is cut by receiving shear force, the load due to the reaction force of the shear forces, to miss the cutting member 301A _L and link 307A _L. However, the load applied by the load applying member 311C _L is applied to the cutting member 301A _L and the link 307A _L.

Thus, even when the load caused by shear force is released, a sudden load fluctuation is suppressed, a rapid rotation and the cutting member 301A _L and the link 307A _L, rapid restoration of the shape which is deformed by the reaction force is suppressed The Thus, rapid rotation and the cutting member 301A _L and the link 307A _L, generation of sound due to rapid recovery of deformed shape by receiving a reaction force is suppressed.

Further, when the needle foot 12A is cut by receiving shear force, the load due to the reaction force of the shear forces, to miss the cutting member 301A _R and link 307A _R. However, the load by the load applying member 311C _R is exerted on the cutting member 301A _R and link 307A _R.

Thus, even when the load caused by shear force is released, a sudden load fluctuation is suppressed, a rapid rotation and the cutting member 301A _R and link 307A _R, rapid restoration of the shape which is deformed by the reaction force is suppressed The Thus, rapid rotation and the cutting member 301A _R and link 307A _R, generation of sound caused by the rapid recovery of the shape which is deformed by the reaction force is suppressed.

  In addition, as a load provision member, it is good also as a structure provided with elastic members, such as rubber | gum, pushed by a cutting member moving from a standby position to a cutting | disconnection end position between a pair of cutting members. Moreover, it is good also as a structure provided with biasing members, such as a spring pushed by a cutting member moving from a standby position to a cutting | disconnection end position between a pair of cutting members. Furthermore, it is good also as a structure provided with biasing members, such as a spring which applies a force in the direction which moves a pair of cutting member from a cutting | disconnection completion position to a standby position.

DESCRIPTION OF SYMBOLS 1 ... Stapler, 10A ... Needle, 12A ... Needle foot, 2A ... Needle launching unit, 21A ... Feeding part, 22A ... Launching part, 3A ... Binding unit, 30A .... Cut part, 31A ... Clincher part, 32A ... Axis, 4A ... Paper clamping part, 40A ... First clamping part, 41A ... Second clamping part, 42A ... Paper position regulating unit, 5A ... drive unit, 6A ... cut needle storage unit, 100A ... needle cartridge, 300A _L , 300A _R ... introduction unit, 301A _L , 301A _R ... cutting member, 302A ... discharge path, 303A ... support plate, 304A ... convex part, 304A _L , 304A _R ... receiving part, 305A _L , 305A _R ... blade part, 306A _L , 306A _R ... · _axis, 307A _L, 307A _R ·· _Link, 308A _L, 308A _R ······ _axis, 309A _L, 309A _R ··· engaged _portion, 310A _L, 310A _R ··· engaging _portion, 311A _L, 311A _R ··· load application Member, 312A _L , 312A _R ... Locking part, 313A _L , 313A _R ... Locking shaft

Claims (4)

A needle launching unit that strikes the needle and penetrates the paper;
A needle storage part that is attached to the needle launching part and houses a needle before being launched from the needle launching part;
A cutting portion for cutting the needle foot of the needle that has penetrated the paper;
It has a binding part that bends the needle foot of the needle that penetrates the paper and binds the paper,
The stapler includes a cutting member that cuts the needle foot, and a load applying member that applies a load to the cutting member by an operation of cutting the needle foot. The cut portion includes a driving force transmission member that transmits a driving force to the cutting member;
The stapler according to claim 1, wherein the load applying member engages with the driving force transmission member to apply a load. The stapler according to claim 1, wherein the load applying member applies a load by engaging with the cutting member. The stapler according to claim 1, wherein
The needle launching unit strikes a needle whose both ends of the needle crown are bent in one direction, and passes a pair of needle feet through the paper,
The cutting portion is provided as a pair of cutting members that the cutting member cuts each of a pair of needle feet,
The load applying member applies a load to at least one of the pair of cutting members.

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