JPS6334082A - Electric stapler - Google Patents

Abstract

(57) [Abstract] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

[Detailed Description of the Invention] [Objective of the Invention] (Industrial Application Field) The present invention mainly relates to an electric stapler for binding stacked paper sheets, and in particular an improved structure for supplying staples to the binding section. Regarding.

(Prior Art) Conventionally, various configurations have been proposed for this type of electric stabilizer, but among these configurations, most of the configurations for supplying the binding needle to the binding section are as follows: For example, as described in Japanese Unexamined Patent Publication No. 58-137570, a needle storage frame is provided on the main body frame so as to be movable up and down, and a pair of guide rails for guiding the needle drive are placed opposite each other in the needle storage frame. A needle pusher having a U-shaped cross section that pushes the needle drive toward the binding section is engaged with the pair of guide rails in a parallel manner so as to move forward and backward, and is rotated to the front part of the needle storage frame on the binding section side. The middle of the coil spring is suspended on an idler roller that is movably mounted on a shaft, one end of this coil spring is locked to the rear end of the needle pusher, and the other end of this coil spring is attached to the needle storage frame. The structure is such that it is locked to the rear end of the body.

The coil spring always urges the needle pusher toward the front of the binding section, and the @ end of the needle pusher pushes the nailer stored in the needle storage frame toward the binding section. It is supposed to be done.

(Problems to be Solved by the Invention) As described above, according to the conventional configuration in which the needle is pushed by the needle pusher that is urged by the biasing force of the coil spring that is stretched by folding the needle, the needle storage frame The biasing force of the coil spring that advances the needle pusher is determined not only by differences in the number of needles stored in the needle and unit length, but also by changes in the length of the needles, which decrease as they are sequentially ejected and consumed. However, the pushing force of the needle pusher is not constant, and the needle pusher must be moved backward each time against the coil spring when storing the needle in the needle storage frame. This requires a troublesome operation, and if the needle pusher were to be automatically retracted as described in, for example, the above-mentioned Japanese Patent Application Laid-Open No. 58-137570, the structure would be complicated and large! There are problems such as unavoidable increase in cost and increase in cost.

Therefore, the present invention has been made in consideration of these points, and it is possible to easily store the stapler in the needle storage frame, and also to easily supply the stapler stored in the needle storage claim to the binding section. It is an object of the present invention to provide an electric stumbler which is capable of increasing its size and avoiding increases in size and cost.

[Structure of the invention]

(Means for Solving the Problems) In the electric stumbler of the present invention, a sheet placement plate having a needle bending groove is fixed to one end of the main body frame, and the stapler is attached to the main body frame in the needle bending groove. A needle ejecting blade for ejecting the needles toward the opposite direction is provided so as to be movable up and down, a needle storage frame is provided on the main body frame for storing the needles having a predetermined length of staples connected thereto, and the needles are ejected to the needle storage frame. A magnet roller is provided so as to be rotatable in the same direction as the direction of movement of the magnet roller, which moves by magnetic force and positions the frontmost binding section directly below the needle ejecting blade.

(Function) According to the electric stapler of the present invention, when a needle of a predetermined length is stored in the needle storage frame and the magnet roller of the needle storage frame is rotated, the needle is driven by the magnetic action of the magnet roller. is moved toward the binding section, and the binding staple at the forefront of this needle driving is supplied directly below the needle driving blade. Then, when the needle ejecting blade is lowered, the frontmost staple is ejected downward from the lower end of the needle ejecting blade, and this staple is press-fitted into the sheet on the sheet placement plate 1, penetrating the sheet on both sides. Both legs of the paper are bent along the needle bending groove, and the paper sheets are stapled by this binding needle.

(Embodiment) Hereinafter, the configuration of an embodiment of the present invention will be described based on the accompanying drawings.

In the figure, reference numeral 1 denotes a main body frame, and a paper sheet placement plate 2 for placing paper sheets is fixed to one end of this main body frame 1, and a needle having a needle bending groove 3 in the middle part of this paper sheet placement plate 2. A receiving plate 4 is embedded and fixed integrally, and the upper surface of this needle receiving plate 4 and the upper surface of the sheet a placement plate 2 are formed on the same plane.

Furthermore, side frames 5.5 are integrally erected on both sides of the main body frame 1 in the width direction, and a first magnet roller 6 is mounted between one end of the opposing side frames 5.5. A second magnet roller 8 is rotatably mounted on a shaft via a shaft 7, and a second magnet roller 8 supports a support shaft 9 at substantially the same level as the first magnet roller 6 between substantially the middle of the opposing side frames 5.5. It is rotatably mounted on an axis via the shaft. The first and second magnet rollers 6.8 have a gear 10 in the middle, and a magnetic disk 12 is fixed integrally to both ends of the gear 10 via a magnet disk 11 having a larger diameter than the gear 10. It is configured as follows.

Further, a drive shaft 13 is rotatably mounted between the other end portions of the opposing side frames 5, 5, and a drive gear 14 is fixed to an intermediate portion of the drive shaft 13. An endless belt 16, which is a timing belt made of rubber or the like, has teeth 15 on the back surface that mesh with the teeth of the respective gears 10, 10 and the second magnet row 56.8. It is suspended. Further, between the second magnet roller 8 and the drive gear 14, a tension roller 17 for the endless belt 16 is rotatably mounted between the opposing side frames 5, 5 via a support shaft 18. There is.

Further, a support frame 19 is fixed to the upper part between the opposing side frames 5, 5, and a guide hole 20 is formed in the middle part of the support frame 19, through which the upper part of the second magnet roller 8 projects. , protrusions 21.21 at the middle upper part on both sides in the width direction.
are relatively prominent.

Next, a needle storage frame 22 having a U-shaped cross section is fixed to the middle upper part of the support frame 19. This needle storage frame 22 has the first and second needles on both sides in the length direction.
A guide port 24 protruding from the upper part of the magnet roller 6.8
．． 25 is formed, and on one end of this bottom plate 23, a U-shaped needle guide frame 26 and the base of a 1-shaped needle guide piece 27 are integrally fixed with screws 28. The needle guide piece 27 is vertically disposed downward from the edge of the bottom plate 23 of the needle storage frame 22 so as to face the needle bending groove 3, and the needle guide piece 27 is provided with guide projections on both sides of the needle guide frame 26 in the width direction. piece 29.29
and guide side pieces 30 on both sides of the needle storage frame 22 in the width direction.
．． 30 and between the guide side pieces 30.30 on both sides thereof and the outer parts of the first and second magnetic rollers 6.8, a large number of U-shaped staples A are installed at a predetermined length. Guide i31 so as to guide the leg C of the needle driver B that is connected in a separable manner.
．． 31 are formed intermittently in communication.

Further, at one end of the needle storage frame 22, a holding frame 32° 32 is integrally fixed to guide side pieces 30, 30 on opposite sides thereof, and a bottom plate portion 69 between the holding frames 32, 32 is fixed.
A relatively large confectionery insertion lower 0 is opened between the paper leaf carrier 1 and the paper leaf carrier 1 plate 2. Also, this opposing holding frame 32.32
A guide piece 33.33 facing the opening of the guide groove 31.31 is bent inwardly at one end of the guide groove 31.31. Further, at the upper part of the needle guide frame 26, the holding frame 32
．． A support frame 34 made of synthetic resin is fixed between the support frames 32 and 32. A guide wall 35 facing the guide pieces 33 and 33 is vertically formed at one end of the support frame 34. The base of a presser piece 37 made of a leaf spring that lightly presses the upper part of the needle hitter B is fixed to a boss 36 projecting from the other end of the needle hitter 34.

Next, a spacer 38.38 is provided on the upper part near one end of the opposing side frames 5, 5 so as to project outwardly, and the shaft portions 39.39 projecting outwardly of the spacers 38.38 on both sides are actuated. The middle part of the arm 40.40 is pivoted through the through hole 41°41 so as to be rotatable in the vertical direction, and the shaft parts 39.3 on both sides are
9 to the spacer 38. A screw hole 42 is formed to communicate with the spacer 38.
．． 42 is screwed with a screw 44.44 via a washer 43.43 for preventing removal. The actuating arms 4 on both sides
0.40 is formed into a road shape when viewed from the side, and the lower end of the interlocking piece 46.46 is rotatably supported at the tip of the horizontal portion 45.45 of the actuating arm 40.40 on both sides. At the same time, the through holes 4 at the upper ends of the interlocking pieces 46 and 46 on both sides
7.47, a support shaft 49.49 protruding from the elevating frame 48 (ifqll) is rotatably inserted into the elevating frame 48. Also, a needle ejecting blade 51 is provided on the back surface of the top plate 50 of the elevating frame 48.
The upper part of the needle ejecting blade 51 is fixed to one piece, and the needle ejecting blade 51 is vertically suspended, and a locking protrusion 52 is formed by cutting and raising the needle ejecting blade 51 approximately in the middle thereof. Further, a needle guide body 53 is engaged with this needle ejection blade 51 so as to be able to rise and fall freely, and a guide elongated hole 54 that is long in the vertical direction and guides the locking protrusion 52 is formed in the middle part of this needle guide body 53. Magnets 56, 56 for adsorbing and supporting both legs of the stapler A are integrally embedded in locking holes 5.55 formed on both sides of the lower part of the hole 54, and a protrusion protruding from the upper part of the guide elongated hole 54. A coil spring 59 is interposed between the piece 57 and a protrusion 58 protruding from the top plate 50 of the elevating frame 48. The needle guide body 53 is always urged downward by the coil spring 59, so that the upper opening edge of the guide slot 54 is locked to the locking protrusion 52 of the needle ejecting blade 51. Then, the needle ejection blade 51 and the needle guide 53 are attached to the holding frame 32.
A series of upper and lower guide grooves 60 are formed between the upper part of the guide piece 33. The needle ejecting blade 5 is inserted into the interior of the
1 is normally engaged with the guide wall 35 at the upper part of the guide groove 60, and the lower end inner side of the needle guide member 53 is normally engaged with the needle driving groove between the needle guide piece 21. The magnets 56 and 56 at the bottom of both sides of the needle guide 53 face the needle guide piece 27 at 61.
is normally opposed to the opening edge of the guide groove 31.31 in the needle drive course 61 between the opening edge of the guide groove 31.31 of the needle guide frame 26.

and vertical portions 62 of said two actuating arms 40.40;
An elongated hole 63.63 is formed at the lower end of 62, and one end of an interlocking arm 64.64 is rotatably pivoted to this elongated hole 63.63 via a support shaft 65.65. The other parts of the arms 64, 64 are rotatably connected to interlocking pins 67, 67 which are protruded from eccentric positions of the rotary disks 66, 66, and the rotary disks 66, 66 on both sides are connected to the drive pins 67, 67. axis 1
It is integrally fixed to both ends of 3. Also, the lower end portions of the vertical portions 62.62 on both sides and the interlocking arms 64.64
A coil spring 68.68 is stretched between the intermediate portion of the vertical portion 62.62 and the interlocking arm 64.64, and the vertical portion 62.62 and the interlocking arm 64.64 are elastically supported toward each other by the coil springs 68.68 on both sides. There is.

Next, a DC type vJI! ! I72
is fixed, and a drive gear 16 fixed to the drive shaft 13 is rotatably engaged with a pinion 74 fixed to the output shaft 73 of the DC motor 72 via a gear interlocking mechanism 75. Further, a cam disc 77 for controlling one rotation is integrally fixed to the drive shaft 13, and a cam 1 is attached to the outer periphery of the cam disc 77.
A release recess 79 is formed in a part of the cam 8 and the cam 78, respectively.

Also, a supporting frame 8 fixed to the other engaging portions of the side frames 5, 5 on both sides.
0 said electric! ! A first microswitch 81 as a control switch electrically connected to the cam disk 172 is fixed, and an actuator 82 of the first microswitch 81 that can move forward and backward is protruded opposite the cam disk 17. A curved portion 83 formed at the upper end of the cam 78 is rotated by the rotation of the cam disk 71.
The cam 78 is adapted to be engaged with and disengaged from a release recess 79 of the cam 78.

Further, a second microswitch 85 as a start switch electrically connected to the motor 72 is fixed to the inside of the support plate 84 fixed between one end portions of the side frames 5.5 on both sides. An actuator 86 of a microswitch 85 is protruded so as to move forward and backward into a guide recess 87 formed in the rear end of the sheet placing plate 2, and a pressure receiving part 88 at the upper end of the actuator 86 is inserted into the guide recess 87. It is adapted to be pushed by the insertion end of the sheet P inserted into the lower 0.

Next, a circuit board 90 is attached to the bottom frame 89 fixed between the lower ends of the side frames 5, 5 on both sides, and the control circuit of this electric stabilizer will be explained below with reference to FIG. A resistor R1, the second microswitch 85, and a capacitor C1 are connected in series between both terminals of the power source 91, and the current from the power source 91 is always connected to the resistor R1 and the second microswitch 85 before the sheet binding operation. The capacitor C1 is charged via the actuator 86 connected to the normally closed contact NC of the microswitch 85. Further, the normally open contact No of the second microswitch 85 is connected to the bases of the first transistor TR1 and the second transistor TR2 via resistors R2 and Ra, respectively, and the emitter of the first transistor The emitter of the third transistor TR3 is connected to the power source 91, and the collector of the third transistor TR3 is connected to the power source 91.
The electric motor 72 is connected to the electric motor 72 . Further, the collector of the first transistor rR1 is connected to the first transistor rR1. The normally open contact NO of the first microswitch 81 is connected to the power supply 91, and the normally closed contact NC of the first microswitch 81 is connected to the fourth transistor 82. Connected to the emitter of TR4.

Further, the emitter of the second transistor TR2 is of the type i! ! 91, the collector of this second transistor TR2 is connected to the power supply 91 via a resistor R4, and the collector of this second transistor TR2 is connected to the base of the fourth transistor rR4. The collector of this fourth transistor TRa is connected to the power supply 91. Further, a capacitor C2 for noise prevention is connected to the electric motor 1fi72, and a capacitor C3 for stabilizing operation provided between the resistor R2 and the first transistor R1 is connected to the power source 9.
1, and further connected to the power source 91 is a circuit operation state setting (bias) resistor R5 provided between the resistor R3 and the second transistor TR2.

Next, the mounting pieces 93 on both sides of the case guide 92 formed in a U-shape are fixed to the opposing holding frames 32. A needle storage cassette case 95 guided by a needle storage frame 92 is detachably attached to the needle storage frame 22. The cassette case 95 is made of synthetic resin and has an open bottom surface, and the side plates 96 facing each other in the width direction.
An engaging piece 97.97 that engages from above the outer side of the opposing guide side piece 30.30 of the needle storage frame 22 is formed on the lower end edge of the needle storage frame 22 by expanding intermittently. Guide pieces 99.99 are independently and freely formed in grooves 98.98 on both sides of the side plates 96.96, and are vertically disposed facing each other. A locking protrusion 100 that locks the needle driver B. 100 is formed on the lower surface of each of the locking protrusions 100 and 100, and a guide slope 101. 101 is formed, and by engaging this guide slope 101° 101 with the guide side pieces 30, 30, the respective guide pieces 99, 99 are expanded.

Also, opposing rising parts 71 in the side frames 5, 5 on both sides
．． A holder 102 that removably supports the cassette case 95 is mounted on support shafts 103.71 on both sides. It is rotatably attached via 103. This holder 102 is made of a spring member, and has a coiled portion 104 wound into a cylindrical shape. 104 is rotatably supported on the support shaft 103° 103, and the coiled portions 104. A substantially U shape that elastically supports the upper part of the cassette case 95 at one end of the cassette case 104
A letter-shaped stopper wire portion 105.degree. 104
Support line portions 106° 106 are formed extending oppositely at the other end, and the opposing support line portions 106. Ring portions 107, 107 formed at the tip of the supporting frame 19
The support shaft 108. is fixed to the opposing projecting piece 21.21 of the support shaft 108.
108, respectively, in a detachable manner.

Next, the operation of the above structure will be explained.

The block-shaped needle B, in which the staple A is connected to a predetermined length, is sequentially stored in the cassette case 95 from the opening on the lower surface thereof, and the opening of the cassette case 95 is turned downward. The side surface portion 109 is aligned with the case guide 92 and pushed downward along the case guide 92. At this time, the leg portion C of the lowermost needle punch B in the cassette case 95 is connected to the locking protrusion 100 of each of the opposing guide pieces 99 and 99 of the cassette case 95. 100, therefore, even if the opening of the cassette case 95 is turned downward, the needle B will not fall. Then, push this cassette case 95 into the cassette case 9.
At the same time, the opposing engaging pieces 97.97 of 5 are engaged with the outside of the guide side piece 30.30 of the needle storage frame 22, and at the same time, each opposing guide piece 99.99 is engaged with the guide side piece 30.30. Guide slope 101 that comes into sliding contact. The locking protrusion 100. 100 is released, the lowermost needle B is dropped from the opening of the cassette case 95 into the needle storage frame 22, and the legs C on both sides of the bracket 8 are released. It is dropped into the guide groove 31.31 inside the guide side piece 30.30. Then, this needle B is sequentially moved toward the needle ejection head 61 along the guide grooves 31 and 31 as described later, and the staple A at the most protruding portion of this needle B is prepared in the needle guide frame in preparation for ejection. The needle is projected into the needle ejecting head 61 in front of the needle 26.

Further, after setting the cassette case 95 on the needle storage frame 22, the holder 102 is rotated around the support shaft 103° 103, and the stopper wire portion 105 on one side thereof is engaged with the upper part of the cassette case 95, Opposing support line portion 106 on the other side. 106 ring part 107
．． 107 is the support shaft 108 of the support frame 19. 108. As a result, the cassette case 95 is held in a set state by the holder 102.

Next, a predetermined number of stacked sheets P to be stapled are inserted into the sheet insertion lower 0, and the insertion end of the sheets P touches the pressure receiving part 88 of the actuator 86 of the second microswitch 85. In response, this actuator 86 separates from the normally closed contact NG and is connected to the normally closed contact No, turning on the second microswitch 85. Further, when the second microswitch 85 is turned on, the electric charge charged in the capacitor C1 is supplied to the bases of the first and second transistors TR1 and TRz through the resistors Rz and R3, respectively.
This first transistor R1 and the third transistor TR3 connected to it in Darlington are turned on, and the DC current IJ@72 is activated by the on operation of this third transistor rR3. Simultaneously with the operation of TR3, the second transistor
Rz is turned on, the base voltage of the fourth transistor TRa is held at the ground state, and this fourth transistor
Ra is prevented from turning on, and therefore the current from capacitor C1 is applied only to motor 72, thereby starting DC motor 72.

Also, this DC electric! This output shaft 73 is activated by the operation of ll72.
The drive VJ gear 76 is meshed and interlocked via the pinion 74 and the gear interlocking Akebono bridge 75, and the drive shaft 13 to which this drive gear 76 is fixed is rotationally driven, and the one-rotation control gear fixed to this drive phase 13 is driven to rotate. The cam disk 77, the drive gear 14, and the rotating disks 66, 66 at both ends are rotated.

Then, due to the rotation of the cam disk 77, the curved portion 83 of the actuator 82 of the first microswitch 81 is disengaged from the release recess 79 of the cam disk 77, and the cam 1 on the outer periphery thereof is removed.
8, this actuator 82 separates from the normally closed contact NG and becomes the normally closed contact N.

The first microswitch 81 is turned on. At this time, the charge stored in the capacitor C1 is consumed and disappears, and the first to third transistors TR1,
TRz and TR3 are turned off, but the DC motor 72
As a result of the ON operation of the first microswitch 81, current continues to flow through the DC motor 7.
2 continues to rotate without stopping its operation, and the cam disk 77 connected thereto also continues to rotate.

Further, due to the rotation of the drive gear 14, the endless belt 14 suspended between the drive gear 14 and the first and second magnet rollers 6.8 is rotated in the direction of feeding the needle B, and this endless belt 14, the first and second magnet rollers 6.8 are rotated, and the needle driver B stored in the needle storage frame 22 is guided by the magnetic force of the first and second magnet rollers 6.8. The needle A at the forefront of the needle PXS is moved along the groove 31.31 and protrudes into the needle driving groove 61 in front of the needle guide frame 26, and is attached to the magnets 56, 56 at the bottom of both sides of the needle guide 53. They abut and are supported by suction, and in this state, the foremost staple A prepares for firing.

In this case, since the first and second magnet rollers 6.8 continue to rotate, they continue to push the needle driver B toward the needle driver 61 while slipping.

Also, due to the rotation of the rotating discs 66, 66 at both ends of the drive shaft 13, the interlocking pin 6 at the eccentric position of the rotating discs 66, 66
The interlocking arms 64.64 on both sides, which are pivotally connected to the interlocking arms 64.
The actuating arms 40.40 on both sides pivotally connected to the spacer 64 are rotated in a downward direction along the horizontal portion 45.45 of the spacer 38.38, with the shaft portion 39.39 of the spacer 38.38 as the rotation center. When the operating arms 40.40 on both sides are rotated downward, the interlocking piece 4 is attached to the tip section of the horizontal portion 45.45.
6. Lifting frame 4 rotatably attached via 46
8 is lowered, and the needle ejecting blade 51 integrated with this elevating frame 48 is also lowered, and this elevating frame 4
The needle guide 53, which is biased and supported at the lower part of the needle 8 via a coil spring 59, is also lowered in the same manner. Then, the frontmost staple A, which was previously projected into the needle driving groove 61 at the lower end of the needle ejecting blade 51, is pushed downward, and the frontmost staple A, which is separated from the second staple, is , while being attracted and supported by the magnets 56 and 56 at the lower sides of the needle guide 53,
In addition, with the lower end of the needle ejecting blade 51 in contact with the upper part of the staple A, it is lowered relative to the sheet P inserted into the sheet insertion lower 0. In this case, the staple A in the R front section separated from the second staple A in the needle storage frame 22 is vertically attracted and supported by the magnets 56 and 56 of the needle guide 53 that is lowered vertically, and is lowered. As a result, when the sheet inserting lower 0 in a space larger than the length of both legs of the staple A is lowered, the staple A is lowered in a preferable driving posture with respect to the paper sheet P without falling or changing the driving posture. and,
The lower end of the needle 11 body 53 is pressed onto the confectionery P on the needle receiving plate 4 by the urging force of the coil spring 59, and while pressing down the paper sheet P, the descending of the needle guide 53 is stopped by the paper sheet P. On the other hand, the lifting frame 48 is further lowered while compressing the coil spring 59, and the needle ejecting blade 51 of the elevating frame 48 is lowered. The staple A on the paper sheet P, which is attracted and supported by the magnets 56 and 56, is forcibly pressed into the paper sheet P, and both legs of the staple A face each other by the needle bend groove 3 on the back side of the paper sheet P. It is bent inward from the direction, and the paper sheet P is bound.

Further, following the binding of paper sheets P, almost simultaneously, the interlocking pins 67, 6 of the rotating disks 66, 66 on both sides continue to rotate.
7 gradually pushes the interlocking arms 64, 64 forward on both sides, and the actuating arms 40, 40 on both sides are rotated upward about the shaft 39°39 in the opposite direction to the above case. As the elevating frame 48 provided between the distal ends of the horizontal portions 45 and 45 rises, the needle ejecting blade 51 is elevated, and the locking protrusion 52 of the separate ejecting blade 51 is moved along the guide elongated hole 54 of the needle guide 53. The locking protrusion 52 is locked to the upper opening edge of the guide elongated hole 54, and at the same time the needle guide 53 is raised in conjunction with the rise of the needle driving blade 51. and,
The lower part of the needle driving blade 51 is pulled upward from the guiding wall 35 of the support frame 34 at the upper part of the guiding groove 60, that is, from the needle driving groove 61 at the lower part of the guiding groove 60, and the second staple A
In preparation for ejection, the magnets 56, 56 on both sides of the lower part of the needle guide body 53 are also pulled up, and these magnets 56, 56 are attached to the guide grooves 31, 31 of the needle guide frame 26.
They are opposed to each other at widely spaced positions forming a needle driving groove 61 on the opening edge of the opening. Further, the needle ejection blade 51 and the needle guide 5
At the same time, the needle part B in the needle storage frame 22 is further pushed by the first and second magnet rollers 6.8 which are rotating while slipping. Then, this second staple A comes into contact with the magnet 56 56 of the needle guide 53 and is attracted and supported, and this second staple A prepares for the next punching.

Next, the cam disk 77 rotated as described above is rotated once.
The first one rotated and engaged with the cam 18 of this cam disk 77
When the curved portion 83 of the actuator 82 of the first microswitch 81 engages again in the release recess 79 of the cam disk 17, the actuator 82 of the first microswitch 81 separates from the normally closed contact No. and becomes a normally closed contact. The connection is returned to NG, and the power supply to the DC motor 72 is stopped.
However, the DC motor 1172 does not stop its rotation immediately, but attempts to continue its rotation due to its rotational inertia, and the DC motor 72 acts as a generator and generates voltage.

Then, this voltage is supplied to the base of the fourth transistor TR4 through the resistor R4, turning off the fourth transistor TR4, and closing the circuit with the DC motor 72, the fourth transistor T Ra, and the first microswitch 81. is configured, and the DC motor 12 becomes short-circuited and its rotational operation is rapidly stopped. That is, DC electric tl1
The rotating operation of 72 is abruptly stopped when the needle ejecting blade 51 and needle guide 53 of the elevating frame 48 are raised to a position in preparation for ejecting the second staple.

When the paper IEP is pulled out from the paper sheet insertion lower 0 after the paper sheets P have been stacked in this way, the actuator 86 of the second microswitch 85 is again separated from the normally closed contact NO and becomes the normally closed contact. It is automatically connected to the NC, and the capacitor C1 is charged with a constant voltage again to prepare for the next binding operation.

〔Effect of the invention〕

According to the present invention, there is no need for a needle pusher to push the needle portion, and there is no need to move the needle pusher backward when storing the needle, so the needle can be easily stored in the needle storage frame. Can be done. Further, the needles stored in the needle storage frame can be easily and smoothly supplied to the binding section by the magnetic force of the magnet roller without being affected by their length or consumption amount. Furthermore, the simple structure of providing a magnetic roller to the 7-stitch storage frame allows the needles to be stored in the needle storage frame and the needles to be sufficiently supplied to the binding section. This eliminates the disadvantages and inconveniences of the conventional configuration, and also makes it possible to reliably avoid an increase in the size and cost of the overall configuration such as a configuration in which the needle pusher is automatically retracted.

[Brief explanation of the drawing]

The drawings show one embodiment of the present invention, in which Fig. 1 is a side view of the electric stabilizer, Fig. 2 is a side view with a part cut away from line a to a of the same as above, and Fig. 3 is the same as Fig. 1. FIG. 4 is a cross-sectional view of the section taken along line C-C in FIG. 3; FIG. Figure 6 is Figure 1e
-el! 7 is an exploded perspective view, FIG. 8 is a side view showing the staple driving operation state, FIG. 9 is a sectional view of the same as above in the stapling state, and FIG. 10 is a circuit diagram. 1. Body frame, 2. Paper sheet placement plate, 3. Needle bend groove,
6.. First magnet roller, 8.. Second magnet roller, 16.. Endless belt, 22.. Needle storage frame, 51.. Needle ejection blade, A.. Staple, B.. Needle driver.

Claims (4)

[Claims] (1) A main body frame, a paper leaf mounting plate fixed to one end of the main body frame and having a needle bend groove, and a paper leaf mounting plate located on the needle bend groove of this paper leaf mounting plate and movable up and down on the main body frame. a needle ejecting blade that is provided and ejects the binding needle toward the needle curved groove;
a needle accommodating frame provided on the main body frame and accommodating a needle group in which staples are connected to each other in a predetermined length; and a needle accommodating frame rotatably provided in the same direction as the moving direction of the needle accommodating frame with respect to the needle accommodating frame. An electric stapler, comprising: a magnetic roller that moves the stapler by magnetic force to position the foremost staple directly below the needle ejecting blade. (2) The electric stapler according to claim 1, wherein a plurality of magnetic rollers are arranged in parallel. (3) The electric stapler according to claim 2, wherein the magnet rollers are arranged in front and behind each other, and are rotated in conjunction with each other in the same direction by an endless drive belt. (4) The magnet roller is rotatably provided with a portion protruding between the legs of the needle group stored in the needle storage case. An electric stapler as described in any of the above.