JP3696019B2 - Drilling device - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a rotary punching device used in a copying machine or a laser printer or used in combination as an option, and more particularly, a punching mechanism having a discharge mechanism for smoothly discharging punch scraps generated by punching. Relates to the device.
[0002]
[Prior art]
2. Description of the Related Art Conventionally, a punch mechanism that opens a hole in a sheet has been incorporated as multifunctional functions of a copying machine and a laser printer are provided. As this punch mechanism, two methods are mainly employed. One is to stop the paper once in the paper transport path, and then execute the punch perpendicular to the paper.
Punching is performed using a pair of perforating rollers that rotate during conveyance.
[0003]
In the former, in order to execute the punch after stopping once, the convex blade (punch) can be fitted into the concave blade (die) from above the paper surface with a relatively strong pressure. Moreover, since the amount of the convex blade (punch) to be inserted into the concave blade (die) can be sufficiently taken, the punch by the insertion operation of the convex blade (punch) can be achieved simply by providing a punch waste collecting container on the lower side of the punching device. Subsequent to the processing, the punch scraps can be sent out to the collection container as they are. However, in order to execute punching after stopping once, the current punching speed cannot be increased.
[0004]
On the other hand, the latter case is suitable for high-speed processing because the punch hole can be punched without stopping once while the convex blade (punch) and the concave blade (die) are rotated synchronously as the punch processing mechanism. It itself has the advantage that it can be designed compactly. On the other hand, the amount of insertion of the convex blade (punch) into the concave blade (die) must be designed to be shallow, and it is difficult to push it into the concave blade (die) using the insertion of the convex blade (punch). . As a result, punch scraps remain in the concave blade (die), and when it accumulates, the punch scrap may be scattered in the conveyance path from the opening of the concave blade (die).
[0005]
[Problems to be solved by the invention]
The present invention provides a punching device capable of reliably discharging punch scraps into a collection container by utilizing the high speed of a rotary punching device.
[0006]
[Means for Solving the Problems]
In the invention of claim 1 for solving the above-mentioned problem, in the rotary punching device having a convex blade roller having punch means and a concave blade roller having die means engaging with the punch blade, the concave blade The roller has a hole in which a moving body having a diameter larger than that of the die opening is provided in an extension of the central axis of the die opening of the roller , and a part of the moving body is located when the die portion of the concave blade roller is located at a lower position. the punching device and said moving member by only its own weight along with the rotation of Tomah so that凹刃roller protrudes outward from the die opening is provided with a chad discharging mechanism for moving the bore of the die Is provided.
In the punching device having such a configuration, even when punching scraps (punch scraps) remain in the die opening of the concave blade roller of the pair of punching rollers by the punching process, the die opening is directed downward as the concave blade roller rotates. The punch waste can be pushed out to the recovery container by moving the punch waste discharge mechanism downward by its own weight and projecting a part thereof from the opening.
[0007]
In addition, since the self-weight is used, it becomes possible to design the punching device without impairing the compactness of the punching roller itself.
[0008]
Further, the invention of claim 2 is characterized in that a spherical body that rolls in the hole is used as the moving body of the perforated waste discharging mechanism.
By selecting the spherical body as the perforated waste discharging mechanism in this way, the movement is performed very smoothly by the weight of the die opening when directed downward with the rotation of the concave roller.
Moreover, since it is a sphere, a part of the sphere can be brought into contact with the entire circumference of the die opening by using a sphere having a diameter larger than that of the die opening. Can be implemented.
[0009]
The invention of claim 3 has the particular feature a cylindrical body or polygonal body the moving body have a protruding portion on the die side tip slides within the bore of the drilling dust discharge mechanism.
By adopting such a mechanism, it is only necessary to design a cylinder having a diameter somewhat larger than that of the die opening, so that the discharge mechanism itself can be designed to be slim.
[0010]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, an embodiment of a perforating apparatus of the present invention will be described with reference to the accompanying drawings. This embodiment is a specific example in which the punching device (punch unit) according to the present invention is applied to a finisher of a copying machine. This specific example is not of a character that limits the technical scope of the present invention, but can also be applied to use in which it is directly incorporated into a copying machine or printer.
[0011]
FIG. 1 is a diagram showing a schematic configuration of the entire finisher according to an embodiment of the present invention. This finisher discharges the paper after performing predetermined post-processing such as punching and stapling on the paper after image fixing sequentially discharged from the copying machine main body, except for the punch unit Pu described later, for example, The finisher described in detail in Japanese Patent Application No. 10-6881 filed earlier by the applicant of the present application can be used.
[0012]
The finisher A1 includes an intermediate tray 6 that can store a plurality of sheets, and a pair of cursors 57 (sheet width alignment guides) that are provided on the sheet storage surface of the intermediate tray 6 and can reciprocate in the sheet width direction perpendicular to the sheet conveyance direction. And a stapler 8 for binding sheets aligned in the sheet width direction by the reciprocating movement of the cursor 57.
[0013]
In the finisher A1, the image-transferred paper P that is sequentially discharged from the copying machine at regular intervals is fed from the paper carry-in entrance 20 with reference to the center position (so-called center position) in the paper width direction perpendicular to the paper transport direction. It is carried into A1. Near the paper carry-in entrance 20, a carry-in switch SW1 that detects the paper P carried into the finisher A1, and a registration roller that corrects the deviation from the direction perpendicular to the carrying direction of the front end of the paper P and feeds it into the finisher A1 at a proper timing. 21. A punch unit Pu is provided for performing punch processing on the loaded paper. The carry-in switch SW1 is, for example, a reflection type optical switch. When the light from the carry-in switch SW1 is reflected by the carried paper P, a paper detection signal indicating that the paper P is detected is sent from the carry-in switch SW1. Is output. Further, the trailing edge of the sheet is also detected by the transition of the sheet detection signal from the “present” state to the “not present” state.
[0014]
The punch unit Pu (details of the punch unit will be described later) is provided in the vicinity of the paper carry-in entrance 20 of the finisher A1, and performs punch processing based on a paper detection signal and the like. A punch waste collection container 30 is provided below the punch unit Pu to store punch waste generated when punching is performed.
[0015]
A conveyance path 54 that conveys the paper P to the non-sorting tray 53 side and a conveyance path 50 that conveys the paper P to the intermediate tray 6 side are connected to the conveyance path 52.
[0016]
The paper P carried in from the copying machine is transported to one of the transport paths 50 and 54 by the swingable branch claw 55. The paper P guided to the conveyance path 54 by the branching claw 55 is discharged to the non-sorting tray 53 with the same surface as when it is discharged from the copying machine. On the other hand, the paper guided to the conveyance path 50 by the branching claw 55 is conveyed to the intermediate tray 6 provided in the vertical direction slightly inclined from the vertical direction.
[0017]
A swingable branch claw 56 is provided in the upstream portion of the conveyance path 50. When the branching claw 56 is at the solid line position, the paper P is transported in the transport path 50 in the direction of the arrow Y2. Further, on the downstream side of the branching claw 56, four sets of the branching rollers 4 (4a, 4b, 4c, 4d) and three branching claws 5 (5a, 5b, 4d) in order from the upstream side to the downstream side in the sheet conveying direction. 5c) is arranged. Each branch claw 5 is swingable, and the paper P is carried into the intermediate tray 6 according to the branch claw 5.
[0018]
The swing position of each branch claw 5 is set in accordance with the length of the paper P in the transport direction during mode standby immediately after the start of operation. For example, in the case of A4 paper, from the direction of the branch claw 5c, and in the case of A3 paper It is carried into the intermediate tray 6 from the direction of the branch claw 5a. As shown in FIG. 1, the intermediate tray 6 is provided with a pair of cursors 57 that can reciprocate in a direction perpendicular to the paper transport direction (paper width direction). The sheets P conveyed through the conveyance path 50 are carried into the intermediate tray 6 while being aligned in the sheet width direction by the cursor 57.
[0019]
An endless belt 58 is stretched on the intermediate tray 6. The endless belt 58 is stretched between the belt rollers 59 and moves the sheet receiver 7 fixed to the surface of the endless belt 58 by traveling in the direction of the arrow X. The paper receiver 7 stands by at the lower part of the intermediate tray 6 when the paper is carried in, and supports one end of the paper P carried in the intermediate tray 6 in the transport direction. Further, in the vicinity of the standby position of the sheet receiver 7, the stapler 8 is provided in a fixed state at two different positions in the sheet width direction. The stapler 8 performs a stapling process on a set of sheets in which one end in the transport direction is aligned by the sheet receiver 7 and the sheet width direction is aligned by the cursor 57. The sheet bound in the conveying direction by the stapling process is conveyed in the direction of the arrow X while being supported by the sheet receiver 7 by the travel of the endless belt 58. Above the endless belt 58, a guide member 60 and a discharge roller 9 for guiding the paper P to the discharge tray 10 are provided. The discharge tray 10 is inclined upward in the discharge direction so as to easily receive the edge-bound paper bundle. The discharge tray 10
The belt is fixed to an endless belt 61 stretched up and down, and is moved in the vertical direction by the endless belt 61 according to the amount of paper discharged while being guided by a guide mechanism (not shown).
[0020]
Next, the perforating apparatus of the present invention will be described with reference to FIGS. 2A and 2B are diagrams for explaining the configuration of the punching device A1 of the present invention. FIG. 2A is a front view of the punching device viewed from the upstream side in the sheet conveying direction, and FIG. It is AA sectional drawing. 3 is a cross-sectional view taken along the line AA for explaining the operation of the main part, which is a feature thereof, and FIG. 4 is a partially enlarged perspective view for explaining the component configuration of the main part of the present invention. In FIG. 2B and FIG. 3 in common, the sheet passes from right to left (in the direction of arrow P1).
[0021]
The configuration of the punch unit Pu will be described with reference to FIG. The punch unit Pu is composed of an upper punch roller 80 and a lower punch roller 82 disposed above and below the upper guide plate 90 and the lower guide plate 91. The upper punch roller 80 includes a shaft 801,
A plurality of (two in this embodiment) punch roller bodies 81 are fixed at predetermined positions on the shaft by screws 812. On the other hand, the lower punch roller 82 includes a shaft 821 and a plurality of (two in this embodiment) die roller bodies 83 fixed at predetermined positions on the shaft by screws 832. Both rollers have a shaft rotatably supported between the side plates 73 and 74 of the punch unit Pu via a bearing 79. The shafts of both rollers can transmit the rotation of the shafts by a pair of gears 77 and 78 outside the side plate 74 (on the left side in FIG. 2A). The gears 77 and 78 have the same number of teeth, and when the upper punch roller 80 makes one revolution, the lower punch roller 82 also makes one revolution. A shaft 801 of the upper punch roller 80 extends to the outside of the side plate 73 (on the right side in FIG. 2A), and a clutch 76 having an input gear 75 is attached to that portion. With these,
Rotational force from a drive source (not shown) is input to the input gear 75 of the clutch 76, and the upper and lower punch rollers rotate simultaneously when the clutch 76 is turned on.
[0022]
The punch unit Pu and its periphery will be further described with reference to FIG. A guide plate 92, which is an upper guide plate 91, is disposed between the upper punch roller 80 and the lower punch roller 82, so that the punch roller body 81 and the die roller body 83 can be disposed so as to be interposed between the two guide plates. 911, 912 are provided. Guide plate 91,
A registration roller pair 21 including an upper registration roller 211 and a lower registration roller 212, and a carry-in switch SW1 are provided in the extension portion 92 on the upstream side of the sheet conveyance (right side in FIG. 2B). As a result, the sheet that has entered from the direction of P1 is detected by SW1 and is temporarily stopped by the registration roller, the deviation of the sheet leading line from the direction orthogonal to the conveying direction is corrected, the timing is adjusted, and the punch unit The paper is fed again toward Pu. If there is no possibility of deviation of the leading edge line of the paper, the registration roller pair can be replaced with a continuously rotating roller pair.
[0023]
In the punch unit, an upper punch roller 80 is covered with an upper cover 70, and a lower punch roller 82 is covered with a lower cover 71. The bottom of the lower cover 71 is provided with a notch hole to which a hopper 72 is attached. Further, a punch scrap collection container 30 is detachably attached to the lower part thereof. Punch waste generated from the punch unit is collected by the hopper 72 and accumulated in the punch waste collection container 30.
[0024]
FIG. 3 shows the process of taking out the core part of the punch mechanism in FIG. 2B and punching the paper P in order. The punch roller body 81 constituting the upper punch roller 80 of the punch unit A1 includes a roller 811 and a punch blade unit 84 attached thereto, and the whole is fixed to the shaft 801 with a screw 812. The punch blade unit 84 is obtained by attaching a punch blade 841 made of a disk-shaped steel blade to a cylindrical mounting base 842. The mounting base 842 is made of a cushioning material such as hard rubber, and has a role of mitigating shock when punching a sheet at the same time that the punch blade 841 is attached to the punch roller body 81. If the shock at the time of drilling is extremely small, the mounting base 842 does not need to use a buffer material.
[0025]
The die roller body 83 constituting the lower punch roller 82 of the punch unit A1 includes a roller 831, a die blade 833, and a sphere 835, and the roller 831 is fixed to the shaft 821 by a screw 832. The lower punch roller 82 is fixed so that the position of the die blade is exactly coincident with the punch blade described above. The die roller body 83 is not normally in contact with the punch roller body 81, and the blades are in contact with each other only when the die blade 833 is associated with the punch blade 841.
[0026]
The perforated waste discharging mechanism portion which is a feature of the present invention will be described with reference to FIG. The die blade 833 is made of steel, and the outer surface 839 is curved so as to form a part of the outer periphery of the lower punch roller 82. A circular hole 840 having substantially the same diameter as the punch blade 841 described above is formed in the outer surface 839, and penetrates to the bottom surface of the die blade with the same diameter. The ridge where the circular hole 840 meets the outer surface 839 is sharp and is hardened by quenching or the like, so that the paper can be punched in cooperation with the punch blade. The roller 831 is provided with a notch 836.
The die blade 833 is press-fitted and fixed. In the notch 836 of the roller 831, a hole 834 is provided in the central axis extension of the attached die blade circular hole 840. Inside the hole,
A sphere 835 smaller than the diameter of the hole and slightly larger in diameter than the circular hole 840 is housed, and the sphere 835 can freely move between the inner bottom of the hole 834 and the bottom of the die blade circular hole 840.
[0027]
Returning to FIG. 3, the movement of the perforated waste discharging mechanism will be described. The punch blades 841 of the punch roller body 81 and the die blades 833 of the die roller body 83 are arranged on the paper carry-in side with respect to a predetermined standby position, for example, the shafts 801 and 821 of each roller, before the paper P is conveyed from the registration roller 21. (A). When the paper P is conveyed from the registration roller 21 and a predetermined time elapses, the clutch 76 is operated, the upper punch roller 80 and the lower punch roller 82 start to rotate, and the punch blade 841 of the punch roller body 81 and the die roller body 83 The punch blade 841 starts to move around each axis in opposite directions (directions of arrows in FIG. 3).
[0028]
After the leading edge of the paper P passes between both rollers, the punch blade 841 and the punch blade 841 start to associate with each other, and at the same time, a hole is formed at a predetermined distance from the front edge of the paper (b). The paper waste Pd punched out from the paper P generated by the punching is pushed into the circular hole 840 of the die blade 833 by the punch blade 841, and remains in the hole even after the punch blade is detached (c). When the die roller body further rotates and the outer side of the hole 834 starts to face downward in the roller 831, the sphere 835 housed in the hole rolls outward due to its own weight, and one of the spheres is placed inside the circular hole 840 of the die blade. The part is inserted and fitted, and the paper waste Pd remaining inside is pushed out and dropped from the die blade. Since the sphere 835 has a diameter slightly larger than that of the circular hole 840, the spherical body 835 remains partly inserted into the circular hole (d). At this time, since the sphere 835 contacts substantially the entire outer periphery of the circular hole 840, the paper waste can be reliably discharged out of the die blade. When the die roller further rotates and the inside of the hole starts to face downward, the sphere rolls toward the inside of the hole by its own weight. By repeating the above process, the paper waste does not stay inside the die.
[0029]
In the above embodiment, the rolling of the sphere is used for the mechanism for discharging the paper waste, but as a modification based on Example 3, a sliding body can be used instead of the rolling element such as a sphere. Details will be described below with reference to FIG. As in FIG. 4, a hole 834 having a slightly larger diameter than the circular hole 840 of the die blade 833 is provided in the notch 836 in the roller 831 of the die roller 83. The hole 834 penetrates to the center of the roller 831 with the same diameter, and the inside of the hole is smoothly finished. A sliding body 335 is housed inside the hole, and the sliding body 335 can freely move between the inner bottom of the hole 834 and the bottom of the die blade circular hole 840. The sliding body 335 includes a protrusion 342 having a smaller outer diameter than that of the die blade circular hole 840 at the tip end of the cylindrical portion 341 having a diameter smaller than that of the hole and slightly larger than that of the circular hole 840.
[0030]
The paper waste discharging action of this modification can be explained by replacing the sphere 835 with the sliding body 335 in FIG. That is, in the explanations of FIGS. 3B, 3C and 3D described above, in addition to the above replacement, “rolling” is set to “sliding”, and “part of the sphere” is set to “projection of the sliding body”. Replace with The process of the modified example described thereby brings about a paper waste discharging effect similar to that of the above-described embodiment. Further, the cylindrical portion of the sliding body may be a polygon such as a triangular prism or a quadrangular prism. In short, it is only necessary to smoothly slide in the hole 834 by its own weight.
[0031]
【effect】
As described above, according to the present invention, even when punching waste (paper waste) remains in the die opening of the concave blade roller of the pair of punching rollers due to the punching process, the die opening is changed along with the rotation of the concave blade roller. When directed downward, the perforated waste discharging mechanism moves downward due to its own weight, and a part thereof protrudes from the opening, whereby punch waste can be pushed out to the collection container. Further, by selecting a spherical body as the punching waste discharging mechanism, the movement is performed very smoothly by the weight of the die opening when directed downward with the rotation of the concave blade roller. Moreover, since it is a sphere, a part of the sphere can be brought into contact with the entire circumference of the die opening by using a sphere having a diameter larger than that of the die opening. Can be implemented.
[Brief description of the drawings]
FIG. 1 is a schematic view for explaining a finisher incorporating a drilling device of the present invention.
FIGS. 2A and 2B are a front view and a cross-sectional view taken along line AA for explaining the configuration of the punching apparatus A1 of the present invention.
FIG. 3 is a cross-sectional view of a piercing device A1 for explaining the operation of the main part of the present invention.
FIG. 4 is a partially enlarged perspective view for explaining a component configuration of a main part of the present invention.
FIG. 5 is a partial enlarged perspective view for explaining a main part component configuration in a diagram of another embodiment belonging to claim 3 of the present invention;
[Explanation of symbols]
Pu punch unit 80 Upper punch roller 81 Punch roller body 82 Lower punch roller 83 Dice roller body 833 Die blade 834 Hole 835 Sphere 840 Circular hole 841 Punch blade

Claims (3)

In a rotary perforating apparatus having a convex blade roller provided with punch means and a concave blade roller provided with die means engaged with the punch blade,
The凹刃rollers, the movable body when having a bore interior of the large mobile unit diameter than the die opening to the central axis extending in the die opening of the roller, die portion of凹刃roller is positioned at a lower position and wherein the movable body only by its own weight along with the rotation of the part Tomah so that凹刃roller protrudes outward from the die opening is provided with a chad discharging mechanism for moving the bore of die Punching device to do. The punching apparatus according to claim 1 , wherein the movable body of the punching waste discharging mechanism is a sphere that rolls in the hole . Perforating apparatus according to claim 1, wherein the moving body of the drilling dust discharge mechanism is a cylindrical member or a polygonal column member slides within the bore have a protrusion on the die side tip.

Images