JP5214689B2 - Drilling device - Google Patents

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a punching device that forms a hole in a punched material such as paper by combining a boring body and a die, and in particular, an image forming apparatus such as a copying machine, a printer, a facsimile, a printing machine, and a composite device thereof. The present invention relates to a perforating apparatus suitable for use in the above.

A pair of eccentric cams are integrally provided on a rotating shaft that is rotated by a motor. Both ends of a punch holding member having a predetermined number of punches are supported by the pair of eccentric cams, and the punches are guided by the rotation of the eccentric cams. The conventional punching device, which is configured to open a hole in a sheet of paper or the like that is stopped by being guided by a hole and moving up and down, engaging with a die, and waiting for the punch away from the sheet Since it is necessary to stop at the position, it has been improved as shown in Patent Document 1.

The drilling device disclosed in Japanese Patent Laid-Open No. 2001-9791 (Patent Document 1), which is a conventional drilling device, changes the rotational motion of the motor to the rotational motion of the pinion via the reduction gear mechanism, and the rotational motion of the pinion meshes with it. The function of converting the linear motion of the cam plate into a linear motion of the cam plate through a rack, and converting the linear motion of the cam plate into vertical movement of the punch through a cam groove formed in the cam plate has been improved.

JP 2001-009791 A Japanese Patent Application Laid-Open No. 07-060695 Japanese Patent Laid-Open No. 08-290398

The improved conventional punching device opens the sheet, and then the sheet is pulled out.
The punch was stopped at a standby position away from the sheet until the next sheet was set. However, since there is only one cam plate, the engagement between the pin provided on the punch and the cam groove is only on one side, and the pin is the cam plate when the shape of the cam groove changes when the cam plate slides left and right. On the other hand, an indefinite angle may be inclined from the vertical direction to the operation direction, and accurate copying operation may be difficult.

Furthermore, since the punch simply punches out the paper, it can punch only a very small number of sheets without pressing the paper.

When drilling with a 0-blade, a perforation mark concentric with the blade remains on the surface where the blade strikes. In addition, there is a problem that the entire cutting edge is subjected to the reaction of the shearing force and the resistance during drilling increases. Further, if the bored cylindrical portion is hollow, the drilled residue is clogged with the bored cylindrical portion, and the residue must be removed every time the drilling is performed, and continuous drilling work cannot be performed. For this reason, there was also a drilling blade with a hole for discharging debris in the gripping part like a skin punch, but since the frictional resistance when the debris moves through the hollow part up to the discharge hole is large, When drilling, the resistance at the time of drilling is further increased, and there has also been a problem that a drilling trace that can be concentrically formed with the blade and a concentric flash that is concentric with the blade formed on the back surface have occurred.

SUMMARY OF THE INVENTION Accordingly, an object of the present invention is to provide a perforating apparatus that can perforate reliably even if the number of perforations is increased, while associating a perforating blade with a cam mechanism in a balanced and accurate manner.

Another object of the present invention is to provide a piercing blade for a piercing device that can pierce a sheet continuously without requiring a large force and without leaving traces or burrs.

(1) An apparatus for punching a paper sheet while rotating the punch, the frame (98), a plurality of punches (30, 31) supported by the frame so as to be vertically movable in the punching direction, and the punch A die (127) provided on the frame facing each other with a sheet bundle interposed therebetween, and a motor (11) for driving the punch are provided.
The plurality of punches have a substantially U-shaped cutting edge (142) for punching a paper sheet by forward rotation and reverse rotation, respectively, and a cam plate (16, 17), and cam grooves (18, 20) for reciprocally moving the plurality of punches in the perforating direction by moving in one direction and moving in the opposite direction are formed on the cam plate, and the motor rotates in the forward direction. The cam plate is moved in the forward direction, the cam plate is moved in the return direction by reverse rotation, and forward rotation and reverse rotation are alternately transmitted to the punch for every punching of the paper sheet.

According to the present invention, the following effects can be obtained.
(1) Since the rotation of the motor is decelerated by the gear mechanism and transmitted to the rotation-linear conversion mechanism, the cam plate can be translated sufficiently powerfully even if the output of the motor is small. The punching body, the paper pressing plate guide body, and the paper push-up body that are substantially provided with the pins that are loosely inserted into the board can be driven strongly.
(2) Two cam plates having cam grooves are arranged along the frame. Since the frame has a throttle, both pins provided on both sides of each moving body are moved left and right in the direction of travel by the cam groove and the throttle. Since it is moved in a balanced manner, there is no malfunction of each moving body.
(3) Since the boring body is rotated at high speed by a driven gear that is vertically and non-rotatably locked to the first tube portion, the boring body can be drilled regardless of the number of sheets.
(4) Since the paper can be clamped by the paper pressing mechanism or the paper lifting mechanism or by the cooperation of the both, a large number of sheets can be punched at once without being restricted by the thickness of the stacked paper as before. can do.
(5) Since each cam groove of the cam plate is formed so that the timing for pinching the paper and the timing for punching the paper can be appropriately set, the timing for inserting and removing the paper is sufficiently secured. Drilling can be performed while holding the paper in the form.
(6) Since the cam groove for the paper push-up body of the cam plate has a wide horizontal groove, it can be held regardless of the thickness of the paper when the paper is pushed by the paper push-up mechanism and the paper press mechanism. .
(7) Since the paper placement mechanism can be configured by a support frame having a paper stacking plate and a lower rubber bush, the configuration can be simplified and failure can be reduced.
(8) The structure can be simplified by providing a single bored body, forming a die with a long lower rubber bush on the support frame, and allowing the support frame to move relative to the bored body. , You can drill holes in any position of the paper.
(9) A cam plate is provided on the rotating shaft of the motor so as to be slidable left and right via a rotation-linear conversion mechanism, and a boring body is provided on the rotating shaft of the motor so as to be able to engage with each other. Since the U-shaped blade is provided, the blade is suitable for the mechanism of the present invention, and the blade life is extended.
(10) The cam groove for raising and lowering the boring body has a V-shaped V-shaped portion following a horizontal portion of a predetermined length, and then has a horizontal portion, while the holding member holds the stacked paper. Since the cam groove for generating the force for generating the cam groove has a slope portion, followed by a horizontal portion, and then a slope portion, the bore is loaded on the motor by a punching operation in a V-shaped region. Before the squeezing member generates a force for squeezing the paper in the inclined region by the motor, and then holds the force in the horizontal cam groove, while the squeezing force is kept constant, Performs a drilling operation in the V-shaped region. Therefore, the load applied to the drive source is averaged, and the load peak can be kept low, whereby the labor saving of the apparatus can be achieved. In addition, since the motor can be downsized, the apparatus can be downsized and the manufacturing cost can be easily reduced.

It is a front view of 1st Example in the punching apparatus of this invention. It is a figure which shows embodiment of the paper pressing process of 1st Example in the punching apparatus of this invention. It is a figure which shows embodiment of the drilling process of 1st Example in the punching apparatus of this invention. It is a figure which shows embodiment of the completion state of all the processes of 1st Example in the punching apparatus of this invention. It is sectional drawing seen from the front side along the cutting line in FIG. 7 of 1st Example in the punching apparatus of this invention. It is a rear view with respect to the front view of FIG. 1 of 1st Example in the punching apparatus of this invention. It is a figure which shows embodiment of the state which sent the paper into the pinching mechanism of 1st Example in the punching apparatus of this invention. It is a figure which shows the form of the actual condition which clamps many sheets of paper with a clamping mechanism of 1st Example in the punching apparatus of this invention. It is a figure which shows embodiment which clamps a small number of sheets of paper with the pinching mechanism of 1st Example in the punching apparatus of this invention. It is a figure which shows embodiment which represents the intermediate state of the boring process of 1st Example in the punching apparatus of this invention. It is a figure which shows embodiment which represents the completion | finish state of the boring process of 1st Example in the punching apparatus of this invention. It is a figure which shows embodiment which represents the parallel displacement mechanism of both the cam plates of 1st Example in the punching apparatus of this invention. It is a figure which shows one Embodiment of the blade part in the perforation apparatus of this invention. It is a figure which shows the corresponding relationship of the cam groove with respect to 1 stroke of the cam board of the punching device which concerns on this invention. It is a side view of 2nd Example in the punching apparatus of this invention. It is a figure which shows embodiment of the pinching mechanism of 2nd Example in the punching apparatus of this invention. It is a figure which shows embodiment of the state which sent the paper into the pinching mechanism of 2nd Example in the punching apparatus of this invention. It is a figure which shows embodiment which clamps many sheets of paper with a pinching mechanism of 2nd Example in the punching apparatus of this invention.

Embodiments of the present invention will be described below with reference to the drawings.

(First embodiment)
FIG. 1 is a front view of a first embodiment of the perforating apparatus according to the present invention. FIG. 2 is a paper pressing process diagram of the first embodiment in the punching apparatus of the present invention. FIG. 3 is a drilling process diagram of the first embodiment in the punching apparatus of the present invention. FIG. 4 is a diagram showing an end state of all the steps of the first embodiment in the punching device of the present invention.

The punching device of the present invention includes a frame, a drive source, a gear mechanism, a rotation-linear conversion mechanism, an orthogonal conversion mechanism, a paper pressing mechanism, a hole punching mechanism, and a paper lifting mechanism. The paper pressing mechanism and the paper lifting mechanism constitute a paper holding mechanism.

The frame includes a bracket 12 that houses a gear mechanism (4 to 6, 8 to 10), a rotation-linear conversion mechanism (13, 14, 134, 135), an orthogonal conversion mechanism (18, 20, 22, 24, 26, 115, 116, 117, 119, 120, 121, 123) and a main body frame 98 that houses a paper pressing mechanism (88) that is one holding mechanism, and a paper lifting mechanism (125 that is the other holding mechanism) ).

Various types of motors 11 can be employed as the drive source. In particular, a DC motor that can take a rotational torque substantially linearly with respect to an input current is suitable. A motor as a driving source is fixed to the bracket 12 so as to mesh with the gear mechanism.

The gear mechanism includes a drive gear 3 fixed to the rotating shaft 2 of the motor 11, a large-diameter intermediate gear 4 that meshes with the drive gear 3, a small-diameter intermediate gear 5 formed integrally therewith, and a small-diameter gear. A first driven gear 6 that meshes with the intermediate gear 5, a second driven gear 8 that meshes with the drive gear 3, a wide relay gear 10 that meshes with the second driven gear 8, and the wide relay gear 10 And a third driven gear 9 that meshes with.

The gear mechanism comprising the large-diameter intermediate gear 4 and the small-diameter intermediate gear 5 integrally formed therewith and the first driven gear 6 reduces the rotation of the rotating shaft 2 of the motor 11 and transmits it to the first pinion 13. The mechanism 7 is configured so that the rotational torque of the first pinion 13 is increased even if the rotational torque of the motor 11 is small.

The second and third driven gears 8 and 9 are formed to have substantially the same diameter as the wide relay gear 10, and substantially rotate the drive gear 3 fixed to the rotary shaft 2 of the motor 11. By simply converting to a ratio of the number of teeth of 3 and the second driven gear 8, it is transmitted to the third driven gear 9 without remarkably decelerating. Thereby, the second and third driven gears 8 and 9 rotate at a higher speed than the first driven gear 6. The second and third driven gears 8 and 9 are loosely fitted to the bores 30 and 31 so as to be movable in the longitudinal direction outside the first cylindrical portion 32 and not rotatable in the circumferential direction. For this reason, the boring bodies 30 and 31 rotate at high speed and can perform the boring operation satisfactorily. Both bored bodies 30, 31 are configured in the same shape.

The wide relay gear 10 is formed such that the width in the rotation axis direction covers the vertical movement range of the second and third driven gears 8 and 9 that accompany the vertical movement of the bores 30 and 31.

The rotation-linear conversion mechanism is shown in FIGS.
FIG. 12 is a view showing an embodiment representing a parallel movement mechanism of both cam plates in the punching device of the present invention.

The parallel movement mechanism of the both cam plates includes a first pinion 13 provided on the rotation shaft 136 of the first driven gear 6, a second pinion 134 meshing with the first pinion 13, and meshing with these two pinions. And first and second cam plates 16 and 17. Both pinions are formed in the same shape. The first and second racks 14 and 135 meshing with the pinions 13 and 134 are also formed in the same shape. As a result, the first and second cam plates 16 and 17 provided on the racks 14 and 135 meshing with the pinions 13 and 134 move in parallel at the same speed. As a result, the moving body provided with pins 115 to 117, 119 to 121, and 123 that move up and down the throttles 103 to 107 of the main body frame and operate in accordance with the cam grooves 18, 20, 22, and 24 of the cam plates 16 and 17, respectively. Can move up and down in a balanced manner without kinking. The racks 14 and 135 can be provided at arbitrary locations as long as they are regions other than the cam grooves of the cam plates 16 and 17.

As the moving body, the boring bodies 30 and 31 and the boring body guide body 54 of the boring mechanism interlocking with the pins, the paper pressing plate guide bodies 64 and 65 of the paper pressing mechanism, and the paper lifting body 125 of the paper lifting mechanism. There is.

As the orthogonal transformation mechanism, both cam plates 16 and 17 in which a plurality of types of cam grooves 18, 20, 22, 24 and 26 are formed, and pins 115 to 117 guided by the cam grooves 18, 20, 22 and 24. , 119 to 121, 123, puncture body guide body 54, paper presser plate guide bodies 64, 65, and paper push-up body 125 including pin support member 131.

Basically, both the cam plates 16 and 17 are arranged so that the boring bodies 30 and 31 can take a predetermined position where the paper can be inserted, a position where the boring operation is performed, and a predetermined position where the paper can be discharged in one stroke. It is necessary that substantially V-shaped grooves are formed as the cam grooves 18 and 20 for the boring body. The opening angle of the “V” can be arbitrarily set according to design matters such as the rotational torque of the motor 11 and the operation strokes of the cam plates 16 and 17.

FIG. 5 is a cross-sectional view of the punching device of the present invention as seen from the front side along the cutting line in FIG. FIG. 6 is a rear view with respect to the front view of FIG. 1 in the punching device of the present invention.

According to one embodiment of the present invention shown in FIGS. 1 to 6, the cam groove for the boring body is formed in a shape in which horizontal grooves for acceleration and timing are formed on both sides of the V-shaped groove. Yes.

The paper presser plate cam grooves 22, 65 so that the paper presser plate guide bodies 64, 65 can take a predetermined position where the paper can be inserted, a position where the paper press operation is performed, and a predetermined position where the paper can be discharged in one stroke. 24 is basically formed with a substantially V-shaped groove in both cam plates 16 and 17. The opening angle of the “V” can be arbitrarily set according to design matters such as the rotational torque of the motor and the operation stroke of the cam plate. According to one embodiment of the present invention shown in FIGS. 1 to 6, even when the thickness of the stacked paper is small, the paper can be reliably pressed in cooperation with the lower paper push-up body. A horizontal groove is formed at the tip of the V-shaped groove to provide an operating margin.

As the boring mechanism, it has a blade part 36 for drilling at one end, a shaft part 40 at the other part, a first cylinder part 32 and a second cylinder part 34 having different inner diameters between both ends, Bore bodies 30, 31 having a flange 38 on the outer side of the substantially intermediate portion and a stepped portion 44 on the lower end of the inner small diameter portion are loosely inserted into the boring body, and a spring stopper 42 is protruded on the substantially intermediate portion. The upper end retaining portion 50 includes eject pins 46 and 47 that are retained by the stepped portion 44 of the boring body, and the inner step portion 44 of the boring body and the spring stopper 42 of the ejecting pins 46 and 47. A compression spring 48 provided therebetween and pins 115 to 117 which are loosely inserted into the cam grooves 18 and 20 of the cam plates 16 and 17 are accommodated, and the cam plates 16 and 17 are connected to the main body frame 98 and the side plate frame. Francs of the boring bodies 30, 31 that are pressed against and supported by Consisting of Toka burr-body guiding body 54 which is attached to the 38. The slidable contact surfaces of the cam plates 16 and 17 of the boring body guide body 54 are formed on a plane having an area that allows a stable sliding operation.

For this reason, it is preferable that the boring body guide 54 is a rectangular parallelepiped or a cube.

The retaining portions 50 of the eject pins 46 and 47 are made of protrusions having a predetermined width in the circumference, and are formed into different operation slits through the insertion slits inside the cylindrical portions of the boring bodies 30 and 31. It can be moved up and down.

The flange 38 is divided into two parts, and can be fitted and fixed after the bored bodies 30 and 31 are stored. The hole bodies 30, 31 and the flange 38 are loosely fitted so as to be alternately rotatable. The shaft portions 40 of the bores 30 and 31 are guided by the opening of the bracket 12, and the first tube portion 32 is similarly guided by the guide bushes 52 and 53 attached to the main body frame 98.

The paper pressing mechanism has a sliding arm 74 that presses and supports the paper pressing plate 88 of the cam plates 16 and 17 to the main body frame 98 and the side plate frame 102 on the outside, and a retaining portion 76 of the guide column 78 on the top. Paper pressing plate guide bodies 64 and 65 having a stepped portion 82 for locking the paper, and a retaining portion 76 at one end, and a projection 84 fixed to the opening of the paper pressing plate 88 at the other end. The guide pillar 78 has a bent piece in the length direction of the main body frame 98, and an opening is formed in a portion facing the blade portion 36 of the boring body 30, 31, and the upper rubber bush 93, 94, and a substantially plate-shaped paper presser plate 88 having an opening for loosely inserting the guide bodies 95 to 97 screwed to the main body frame 98, and a paper presser plate guide body 64 attached to the outside of the guide column 78. , 65 between the step 82 and the paper pressing plate 88. Consisting of a compression spring 86..

The sliding contact surfaces of the sliding arms 74 of the paper pressing plate guides 64 and 65 with the cam plates 16 and 17 are formed in a plane having an area that allows stable sliding operation.

The paper push-up mechanism has a substantially plate-like shape including a die 127 with lower rubber bushes 132 and 133 that is fixed to the support frame 124 with one end and is provided to face the blade portion 36 of the boring bodies 30 and 31. Of the first cam plate 16 and a pin support member for supporting a fifth pin 123 that is loosely inserted into the paper push-up body cam groove 26 of the first cam plate 16 via a throttle 105 formed in the back plate portion 99 of the main body frame 98. 131, which are fixed with screws. The paper pusher cam groove 26 is formed into a shape, and the horizontal groove portion is formed wider than the other groove portions. This is to absorb fluctuations in the thickness of the paper laminated at the horizontal groove portion.
(Relationship between each cam groove position and each mechanism)
1 to 6 of the punching device of the present invention, each cam groove position and each mechanism so as to perform the following operations within a stroke period of the cam plates 16 and 17 in one left-right direction. Is set as shown in FIG.

FIG. 14 is a view showing the vertical movement relationship of the pins with respect to one stroke of the cam plate of the drilling device according to the present invention, that is, the correspondence relationship of the cam grooves.

14 represents the operation stroke of the cam plate, the A stroke represents the operation stroke of the boring body and the guide body for the boring body, the B stroke represents the operation stroke of the guide body for the paper holding plate, and the C stroke. Represents the operation stroke of the paper push-up body.
(I) The paper pressing mechanism and the paper lifting mechanism are positioned at the initial position where the paper can be inserted, that is, the pins of each mechanism are positioned substantially at the right end or the left end of each cam groove in FIG. The cam grooves and the mechanisms are arranged in association with each other.
(Ii) When the control device (not shown) detects that a paper has been inserted between the paper pressing mechanism and the paper lifting mechanism by a sensor (not shown), the control device (not shown) operates the motor 11 and the pinions 13 and 134 and the rack. The cam plates 16 and 17 are slid in one direction via 14 and 135.
(Iii) In the S1 stroke of one stroke of the cam plates 16 and 17, the pins 115 to 117 of the boring bodies 30 and 31 move in the A1 stroke which is the horizontal groove portion of the boring cam groove A, and press the paper. The pins 119 to 121 of the plate guide bodies 64 and 65 move in the B1 stroke which is the lowering groove portion of the paper pressing plate cam groove B, and the pin 123 of the paper pressing body 125 is the rising groove portion of the paper pressing body cam groove C. Move a certain C1 journey.
(Iv) In the S2 stroke following the S1 stroke in one stroke of the cam plates 16 and 17, the pins 115 to 117 of the boring bodies 30 and 31 perform the A2 stroke which is the descending groove portion of the cam groove A for the boring body. Then, the pins 119 to 121 of the paper pressing plate guide bodies 64 and 65 move in the B2 stroke which is the horizontal groove portion of the paper pressing plate cam groove B, and the fifth pin 123 of the paper pressing body 125 is for the paper pressing body. The C2 stroke that is the horizontal groove portion of the cam groove C is moved.

In this S2 step, the upper rubber bushings 93 and 94 of the paper presser plate 88 of the paper presser mechanism and the lower rubber bushings 132 and 133 of the spring member 126 of the paper presser mechanism are nipped so as not to rotate together, The paper is punched by the blade 36 of the punching mechanism.
(V) In the S3 stroke following the S2 stroke in one stroke of the cam plates 16 and 17, the pins 115 to 117 of the boring bodies 30 and 31 perform the A3 stroke which is the rising groove portion of the cam groove A for the boring body. Then, the pins 119 to 121 of the paper pressing plate guide bodies 64 and 65 move in the B3 stroke which is the horizontal groove portion of the paper pressing plate cam groove B, and the fifth pin 123 of the paper pressing body 125 is for the paper pressing body. The C3 stroke that is the horizontal groove portion of the cam groove C is moved.

In this step S3, the upper rubber bushings 93 and 94 of the paper presser plate 88 of the paper presser mechanism and the lower rubber bushings 132 and 133 of the spring member 126 of the paper presser mechanism continue to be nipped so as not to rotate. Then, the blade part 36 of the hole punching mechanism is pulled out from the hole formed by punching the paper.
(Vi) In the S4 stroke following the S3 stroke in one stroke of the cam plates 16 and 17, the pins 115 to 117 of the boring bodies 30 and 31 perform the A4 stroke which is a horizontal groove portion of the cam groove A for the boring body. Then, the pins 119 to 121 of the paper pressing plate guide bodies 64 and 65 move in the B4 stroke which is the rising groove portion of the paper pressing plate cam groove B, and the fifth pin 123 of the paper pressing body 125 is for the paper pressing body. The C4 stroke that is the descending groove portion of the cam groove C is moved.

At the end of the step S4, the punching mechanism is returned to the initial state, and the paper pressing mechanism and the paper lifting mechanism are returned to the initial position where the paper can be extracted.
(Operation of each mechanism)
Drilling mechanism:
The rotational torque of the motor 11 rotated under the control of the control device is transmitted to the second driven gear 8 via the drive gear 3 and further to the third driven gear 9 via the wide relay gear 10. The boring bodies 30 and 31 interlocking with the third driven gear 9 are rotated at high speed. At this time, as described above, the second and third driven gears 8 and 9 are movable in the length direction outside the first cylindrical portion 32 of the bores 30 and 31 and rotate in the circumferential direction. It is impossible to loose.

From this initial state, in the S1 stroke of one stroke of the cam plates 16 and 17, the pins 115 to 117 provided on the boring body guide body 54 move in the horizontal groove portion A1 of the boring body cam groove A. The boring bodies 30 and 31 are moved in a state where the initial height position is maintained.

In the S2 stroke of one stroke of the cam plates 16 and 17, the pins 115 to 117 provided on the boring body guide body 54 move in the descending groove portion A2 of the boring body cam groove A. Therefore, the boring body 30 , 31 proceeds downward while punching the paper as shown in FIG. 10, and completes the punching of the paper as shown in FIGS. 3 and 11, and the blade portion 36 opens the hole 129 of the die 127. Enter and enter to finish the descent.

In the middle of the descent, the eject pins 46 and 47 are pushed back into the second cylindrical portion 34 while compressing the compression spring 48 due to the resistance of the paper until the hole punching of the paper is not completed.

When the punching is completed, the paper resistance disappears, so the eject pins 46 and 47 are pushed out toward the blade 36 by the spring force of the compression spring 48, and the punched paper is discharged below the die 127 at the same time.

In the S3 stroke of one stroke of the cam plates 16 and 17, the pins 115 to 117 provided on the boring body guide body 54 move in the rising groove portion A3 of the boring body cam grooves 18 and 20. Ascending so that the blades of the boring bodies 30, 31 exit from the hole in the paper.

In the S4 stroke of one stroke of the cam plates 16 and 17, the pins 115 to 117 provided on the boring body guide body 54 move in the horizontal groove portion A4 of the boring body cam groove A. Therefore, the boring body 30 31 hold the initial height position and move to a standby position for the next return stroke.

The two boring bodies 30 and 31 are synchronized in operation by the cam grooves 18 and 20 and the throttles 104 and 106. In the illustrated embodiment, the number of bored bodies is two, but one or two or more can be arranged in the same manner.

Paper holding mechanism:
FIG. 7 is a view showing an embodiment of the punching device of the present invention in a state where the paper is fed into the holding mechanism.

From the initial state shown in FIG. 1 and FIG. 7, in the S1 stroke of one stroke of the cam plates 16 and 17, the pins 119 to 121 provided on the sliding arms 74 of the paper pressing plate guide bodies 64 and 65 are pressed by the paper pressing plate. Since the lowering groove portion B1 of the plate cam groove B is moved, the paper pressing plate guide bodies 64 and 65 are lowered from the initial height position. Along with this, the guide pillar 78 held by the compression spring 86 and the paper pressing plate 88 held at the tip of the guide pillar 78 are also lowered. In the middle of this process, the upper rubber bushes 93 and 94 of the paper pressing plate 88 come into contact with the upper surface of the paper. From this state, the paper pressing plate guide bodies 64 and 65 are further lowered while compressing the compression spring 86 as shown in FIG.

FIG. 8 is a diagram showing an embodiment in which a large number of sheets are nipped by a nipping mechanism in the punching device of the present invention. FIG. 9 is a view showing an embodiment in which a small number of sheets are nipped by a nipping mechanism in the punching apparatus of the present invention.

In the S2 stroke of one stroke of the cam plates 16 and 17, the pins 119 to 121 provided on the paper pressing plate guide bodies 64 and 65 move in the horizontal groove B2 of the paper pressing plate cam groove B. As shown in FIG. 8 or FIG. 9, the plate guide bodies 64 and 65 hold the state where the paper is pinched in cooperation with the paper push-up body 125.

In the S3 stroke of one stroke of the cam plates 16 and 17, the state where the paper is pinched is maintained following the S2 stroke.

In the S4 stroke of one stroke of the cam plates 16 and 17, the pins 119 to 121 provided on the paper pressing body guide bodies 64 and 65 move in the rising groove B4 of the paper pressing body cam groove B. The plate guide bodies 64 and 65 return to the initial height position and move to the standby position for the next return stroke.

The two paper pressing plate guide bodies 64 and 65 are synchronized in operation by the cam grooves 22 and 24 and the throttles 103 and 107. In the illustrated embodiment, there are two paper pressing plate guide bodies, but one or two or more guide bodies can be arranged in the same manner.

Paper lifting mechanism:
One end of the spring member 126 is fixed to the support frame 124 with screws, and the other end is bent and fixed to one end of the pin support member 131 with screws. A fifth pin 123 is fixed to the other end of the pin support member 131. The fifth pin 123 is loosely fitted to the position of the cam pusher cam groove 26 of the first cam plate 16 in FIG. 1 through the throttle 105 of the back member 99 of the main body frame 98. Regarding the groove width of the cam groove 26 for the paper push-up body, the groove width in the C2 stroke and the C3 stroke shown in FIG. 14 is wider than the groove width in the C1 and C4 strokes. That is, the groove width has a wide margin so that it can be sufficiently held in any case even if the thicknesses of the stacked papers held by the holding mechanism are different.

From the initial state, in the S1 stroke of one stroke of the first cam plate 16, the fifth pin 123 moves in the rising groove C1 of the paper pusher cam groove C, so that the spring member 126 of the paper pusher 125 is moved. Ascending from the initial height position in a cantilevered state by the spring force. As this rises, the lower rubber bushes 132 and 133 provided on the die 127 of the spring member 126 rise from the position of FIG. 7 to the position of FIG. 8 or FIG. 9, and abut against the lower side of the paper to push up the paper. .

In the S2 stroke of one stroke of the first cam plate 16, the pin 123 moves in the substantially horizontal groove C2 of the paper pusher cam groove C, so that the lower rubber bushes 132 and 133 are moved to the end of the C1 stroke. The state, that is, the state in which the paper is continuously pushed up is kept. In this C2 stroke, the drilling mechanism changes from the state of FIG. 2 to the state of FIGS. 3 and 11 through the state of FIG.

FIG. 10 is a view showing an embodiment representing an intermediate state of a drilling process in the perforating apparatus of the present invention. FIG. 11 is a view showing an embodiment representing the end state of the boring process in the perforating apparatus of the present invention.

In the S3 stroke of one stroke of the first cam plate 16, the pin 123 moves in the substantially horizontal groove C3 of the paper pusher cam groove C, so that the lower rubber bushes 132 and 133 are moved to the final stage of the C2 stroke. The state, that is, the state in which the paper is continuously pushed up is kept.

In this C3 stroke, the boring mechanism returns from the state of FIGS. 3 and 11 to the state of FIG. 2 through the state of FIG.

In the S4 stroke of one stroke of the first cam plate 16, the lower rubber bushes 132 and 133 move in the C1 stroke in which the pin 123 moves in the descending groove C4 from the final state of the C3 stroke, that is, the state of pushing up the paper. The reverse operation is performed to return to the state of FIG. 4 and FIG. 7, and the state shifts to the standby state for the return stroke and stops.

The upper and lower rubber bushings 93, 94, 132, 133 have a function of preventing the paper from being rotated during the drilling. The inner diameter of the rubber bush is formed to be about 0.1 mm larger than the outer diameter of the blade portion of the boring body.

Drilling body blade:
The blade portions 36 of the boring bodies 30 and 31 shown in FIG. 1 are in the form of a single blade or two or more blades. 13 (a), (b), and (c) show an example of a two-blade. The blade is preferably formed in a substantially U shape so that the point in contact with the paper becomes a point in principle, which is equal to the left and right with respect to the center line in the length direction.

FIGS. 13A to 13F are views showing a form of one embodiment of the blade portion in the perforating apparatus of the present invention.

FIGS. 13A, 13B, and 13C are examples of a two-blade. The blade portions 140 and 141 are cut off on the inner side, and the outer side is the cylindrical outer surface as it is, and a slit 144 is formed between the two blades.

Since the blades 140 and 141 are provided with the slits 144 so that the punched paper is easy to fall and is formed equally to the left and right with respect to the center line in the length direction, the cutting edges are alternately arranged at the left and right alternate strokes of the cam plate. The drilling operation can be performed by changing the direction, and adverse effects caused by using the blade edge in only one direction can be suppressed. In addition, since the blade edge 142 contacts in principle at one point of the paper, the contact area can be reduced, the generation of heat can be reduced, and further, since the contact is made at one point, the paper can be easily cut. Further, since the cutting edge is formed in a substantially U shape, it can be cut in the same way from either the left or right direction, and in particular, the forward / reverse rotation of the motor is converted into a left / right sliding operation of the cam plate as in the present invention. In an apparatus employing a necessary mechanism, the two-blade or single-blade manufactured on the premise that the forward / reverse rotation of the motor, that is, the rotation direction is alternately changed, is optimal. By using a blade as shown in these examples, the life of the blade is extended about twice as much as that of a conventional one-blade or zero-blade.

(Second embodiment)
FIGS. 13D, 13E and 13F show an example of a single blade. The blade portion 140 is provided for one blade below the second cylindrical portion 34. The formation form and the like of the cutting edge are the same as those of the two-blade embodiment.

Next, a second embodiment of the present invention will be described with reference to FIGS.

FIG. 15 is a side view of the second embodiment of the punching apparatus of the present invention. FIG. 16 is a view showing an embodiment of a pinching mechanism in the second embodiment of the punching apparatus of the present invention. FIG. 17 is a view showing an embodiment of the second embodiment of the punching apparatus of the present invention in a state where the paper is fed into the holding mechanism. FIG. 18 is a diagram showing an embodiment in which a large number of sheets are nipped by a nipping mechanism in the second embodiment of the punching apparatus of the present invention.

The second embodiment is configured as shown in FIGS. 15 and 16, and the portion above the line DD in FIGS. 15 and 16 is the same as the configuration shown in FIGS. It is. The second embodiment is characterized only by the configuration below the line DD in FIG.

The support frame 161 is formed with a die 127 provided with lower rubber bushes 132 and 133 at predetermined positions. The paper stacking plate 160 is formed of a spring plate, and is provided with openings having a larger inner diameter at locations corresponding to the lower rubber bushes 132 and 133, and is fixed to a support frame 161 that is cantilevered. ing.

In a state where no paper is placed, as shown in FIG. 16, the upper surface of the lower rubber bush 132 is offset so as to be lower than the upper surface of the paper stacking plate 160 by a distance corresponding to a predetermined angle θ.

From this state, the upper surface of the lower rubber bush 132 is set to be lower than the upper surface of the paper stacking plate 160 even when paper is loaded as shown in FIG.

When the paper is pressed against the support frame 161 by lowering the paper pressing plate 88 as shown in FIG. 18 by driving the motor from the paper set state, the paper stacking plate 160 bends due to its elasticity, and finally the lower rubber bushing. The paper is held between the pressing force 132 and the upper rubber bush 93 of the paper pressing plate 88. In this state, drilling is performed.

Compared with the first embodiment, the apparatus according to the second embodiment has a lower rubber bush fixed to the support frame, so that members such as the paper push-up body 125 can be omitted and can be constructed at low cost. . In addition, the mechanism becomes simple and failure can be reduced.

DESCRIPTION OF SYMBOLS 1 Drilling apparatus 2 Rotating shaft 3 Drive gear 4 Large diameter intermediate gear 5 Small diameter intermediate gear 6 First driven gear 7 Reduction gear mechanism 8 Second driven gear 9 Third driven gear 10 Wide relay gear 11 Motor (DC)
12 Bracket 13 1st pinion 14 1st rack 16 1st cam plate 17 2nd cam plates 18 and 20 Cam groove 22 and 24 for boring body 26 Cam groove for paper presser plate 26 Cam groove 30 and 31 for paper push-up body Body 32 First tube portion 33, 34 Second tube portion 36 Blade portion 38 Flange 40 Shaft portion 42 Spring stopper 44 Step portion 46, 47 Eject pin 48 Compression spring 50 Retaining portion 52, 53 Guide bush 54 Guide for boring body Body 56, 57 Pin housing hole 58 Sliding surface 64, 65 Paper holding plate guide body 66 Pin housing hole 68 Sliding surface 74 Jumping arm 76 Stopping portion 78 Guide column 82 Step portion 84 Protruding portion 86 Compression spring 88 Paper holding member Plates 93, 94 Upper rubber bushes 95, 96, 97 Guide body 98 Main body frame 99 Rear plate portion 100 Upper plate portion 101 Lower plate portion 102 Side plate frames 103, 104, 105, 1 06, 107 Throttle 115, 116 1st pin 117 2nd pin 119, 120 3rd pin 121 4th pin 123 5th pin 124 Support frame 125 Paper push-up body 126 Spring member 127 Die 129 Opening 131 Pin support members 132, 133 Lower rubber bush 134 Second pinion 135 Second rack 136, 137 Rotating shaft 140, 141 Blade portion 142 Blade edge 144 Slit 160 Paper stacking plate 161 Support frame

Claims (3)

A device for punching a paper sheet while rotating the punch,
Frame,
A plurality of punches supported by the frame so as to be vertically movable in a perforating direction;
A cam that reciprocates the plurality of punches in the perforating direction at each of the forward and backward strokes of a predetermined stroke;
A forward / reverse motor for transmitting drive to the punch and the cam ;
With
The plurality of punches are
It has a substantially U-shaped cutting edge that pierces the paper sheet in both the forward direction rotation and the reverse direction rotation,
The motor is
With the forward rotation, the cam moves in the forward direction, and the plurality of punches rotate in one direction.
The return direction movement of the cam and the plurality of punches are rotated in opposite directions by the reverse rotation . 2. The punching device according to claim 1, wherein the cam is formed with a V-shaped cam groove that vertically moves the plurality of punches in the punching direction by forward movement and backward movement. The plurality of punches are
3. The perforation according to claim 2, wherein in one stroke of the reciprocating cam, the paper moves from a rising position where the paper enters to a falling position where the paper is punched, and then returns to a rising position where the paper is discharged. apparatus.

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