JPH05317740A - Feeder for shredder - Google Patents

Abstract

PURPOSE:To make it possible to automatically separate a bound part of a paper bundle in the bound form when the paper bundle is fed to a shredder by only putting the paper bundle, as it is, on a tray even if needles of a staple are not removed in advance. CONSTITUTION:A binding part separation means which separates the binding part 13b of a paper bundle 13 when the bundle 13 is transferred is provided on a tray 12 of a feeder. This means is, for example, a separating claw 72 and the like provided in a recess 12a of the tray 12.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a paper feed device for a shredder, which separates a bundle of papers stacked on a tray portion by a separating / conveying portion and conveys them to a shredder input port.

[0002]

2. Description of the Related Art Conventionally, when shredder is used to shred confidential documents, a paper bundle bound with staples or the like is manually separated so that the shredder has a thickness equal to or smaller than that of the shredder. I was throwing it into a shredder.

Further, when the paper feeding device automatically feeds paper to the shredder, the stapler needles and the like must be removed and separated in advance before stacking the paper bundle on the tray portion. Was not easy to use.

[0004]

SUMMARY OF THE INVENTION It is an object of the present invention to, in the case of a bound paper bundle, simply feed the paper bundle to the shredder by simply stacking it on the tray portion without removing staples or the like in advance. Sometimes it is to be able to separate the binding part automatically.

[0005]

According to the present invention, there is provided a paper feed device for a shredder which separates a bundle of papers stacked on a tray portion by a separating / conveying portion and conveys the bundle of papers to a slot of a shredder. It is characterized in that a binding portion separating means for separating the binding portion along with the conveyance is provided.

As the binding portion separating means, for example, a separating claw provided in a concave portion of the tray part, a separating hole provided in the tray part, or a separating claw provided so as to be retractable in the tray part is conceivable.

[0007]

When a bundle of sheets stacked on the tray has a binding portion bound with staples or the like, the binding portion is caught by the binding portion separating means and is automatically separated as the sheet bundle is conveyed.

[0008]

Embodiments of the present invention will now be described in detail with reference to the drawings. As shown in FIG. 1, a sheet feeding device 10 according to the present invention.
Is separate from the shredder 11 and is detachably set on the upper surface of the shredder 11 for use. The sheet feeding device 10 automatically feeds the sheet bundle 13 stacked on the tray section 12 to an input port 11 a provided on the upper surface of the shredder 11.

FIG. 2 shows the internal structure of the sheet feeding device 10.
The tray portion 12 is inclined (for example, 30 degrees), and the conveyor belt 14 is stretched between the drive pulley 15 and the driven pulley 16 along the inclination. The conveyor belt 14
Is circulated by the drive pulley 15 transmitting the rotation from the paper feeding motor 17 via the transmission belt 18,
The sheet bundle 13 stacked on the tray unit 12 is sequentially conveyed from the lower side.

On the tray portion 12, a pair of left and right side guide members 19 opposed to each other are interlocked to the left and right so as to regulate the stacking position of the sheet bundle 13 and guide the conveyance thereof. And movably installed,
The interval is detected electrically. FIG. 3 shows a mechanism for interlocking these side guide members 19 and a mechanism for detecting the distance between them. Both side guide members 19 have wires 22 whose sliding bases 20 are wound between pulleys 21 on both sides.
They are connected to each other via, and can be brought close to or separated from each other at the same time. The slider 24 of the slide resistor 23 is connected to the slide base portion 20 of one side guide member 19, and when the distance between both side guide members 19 is adjusted, the resistance value of the slide resistor 23 is adjusted according to the distance. Changes, and the distance between both side guide members 19 is detected as the amount of electricity.

In FIG. 3, if one of the pulleys 21 is connected to a motor, the distance between the side guide members 19 can be automatically adjusted. In that case, by inputting the size of the sheet bundle 13 from the operation unit or by detecting the size of the sheet bundle 13, the both side guide members 19
The interval can be set automatically.

On the upper side of the tray portion 12, as shown in FIG. 2, the bundle of paper 13 is pressed from the upper side to convey belt 14.
A pressurizing mechanism 25 for pressing against is attached. The pressurizing mechanism 25 includes guide slits 2 on the left and right side plates (not shown).
6, a pressurizing plate assembly 27 that can move up and down along with 6, a pressurizing motor 28, a worm 30 that transmits the rotation of the pressurizing motor 28 to a pressurizing drive shaft 29, a worm wheel 31, a transmission belt 32, and a pressurizing drive shaft 29. The belt 35 is wound around a drive pulley 33 fixed to the driving pulley 33 and a driven pulley 34 fixed to a position separated from the driving pulley 33. The belt 35 is connected to the pressure plate assembly 27. Initially, the pressure plate assembly 27 is retracted to the top dead center so that the sheet bundle 13 can be stacked on the tray portion 12 on the lower side thereof. The fact that it is located at the top dead center is detected by a top dead center sensor (not shown in FIG. 2).

The pressure plate assembly 27 is shown in FIGS.
As shown in FIG.
A combination of a letter-shaped lower pressure plate 27b and a lower pressure plate 27b that are movable relative to each other within a predetermined upper and lower range, and a plurality of springs 36 for biasing them in a direction in which they are separated from each other and a lower pressure plate 27b. A micro switch 37 for pressure detection which is activated is arranged. The operation of the pressurizing motor 28 is controlled by turning on / off the microswitch 37. The strength of the spring 36 when attached is, for example, about 3 kg.

When the pressure plate assembly 27 presses the sheet bundle 13 with a predetermined pressure as shown in FIG. 6, the lower pressure plate 27b is pressed.
Is pushed up against the spring 36, the micro switch 37 for pressure detection is turned on, the motor 28 for pressure is turned off, and the lowering of the pressure plate assembly 27 is stopped.
Since the pressurizing motor 28 inertially rotates for a while even if it is turned off, the actuator of the micro switch 37 is further pushed within the range of overtravel.

When the paper bundle 13 is reduced, the pressing lower plate 27b is pushed down by the spring 36, and the actuator of the microswitch 37 returns to a position beyond the release position, whereby the microswitch 37 is turned off. Then, the pressurizing motor 28 is turned on and the pressurizing plate assembly 27 descends until the microswitch 37 is turned on again. Therefore, the pressure plate assembly 27 always presses the bundle of papers 13 within a constant pressure range, and prevents the paper conveying force from being reduced and the paper not to be fed.

The sheet bundle 13 thus pressed against the conveyor belt 14 by the pressure plate assembly 27 is separated according to the size of the gap 39 formed by the conveyor belt 14 and the gap plate 38 as shown in FIG. To be done.

The gap plate 38 interlocks with the side guide members 19, that is, according to the resistance value of the slide resistor 23, in order to make the size of the gap 39 according to the distance between the side guide members 19. It is automatically moved up and down by the gap adjusting mechanism 40 shown in FIG. The gap adjusting mechanism 40 includes a gap control motor (stepping motor) 42 having a gear 41, a gear 43 meshing with the gear 41, and a drive shaft (horizontal axis) 4 having two worms 44.
5, two driven shafts (vertical axis) 47 having a worm wheel 46 that meshes with each worm 44 and a male screw, and upper and lower bearings 48 that respectively bear these driven shafts 47 on the frame (not shown) of the sheet feeding device 10. .49, gap plate 38
It is composed of two brackets 50 fixed to the bracket 50 and nuts 51 fixed to the brackets 50 and respectively screwed into the male screws of the driven shafts 47.

FIG. 8 is a block diagram showing the electrical construction of the paper feeding device 10. The paper feeding device 10 is entirely controlled by a microcomputer. The CPU 52 of the microcomputer has a dip switch 53 for setting the model of the shredder 11 to be used (especially the output of the cutter motor) and the power supply frequency in addition to the amount of electricity according to the distance between the side guide members 19 from the slide resistor 23. And the power supply voltage detected by the power supply voltage detection circuit 54 are determined, and the driver circuit 55 that drives the gap control motor 42 is controlled. That is, the gap between the side guide members 19 that matches the size of the sheet bundle 13, the type of the shredder 11 to be used, the power supply frequency, and the power supply voltage are comprehensively determined, and the gap 39 is adjusted to the optimum size. The plate 38 is moved up and down.

In FIG. 2, the sheet bundle 13a that has passed through the gap 39 set as described above is forcibly conveyed by being sandwiched between the conveying roller 56 and the driven roller 57, and along the conveying guide 58, the shredder 11 is formed. Is fed to the insertion port 11a of the device, guided by the inclined insertion guide 59 of the insertion port 11a, sent to the cutter 60, and shredded. Conveyor roller 5
The distance between 6 and the cutter 60 is, for example, 200 mm. If the small-size sheet bundle becomes free after exiting the transport roller 56, it may stop at a position where it does not reach the cutter 60. Particularly, in the recent shredder, the inclination of the feeding guide 59 of the feeding port 11a has become gentle because of safety considerations.
We cannot expect the stack of paper to fall under its own weight.

Therefore, the sheet feeding device 10 has an inlet 11a.
Auxiliary transport roller 61 that assists transport where it faces inside
A movable guide member 62 that presses the sheet bundle against the auxiliary transport roller 61, and an auxiliary guide plate 63 that extends from the movable guide member 62 are provided. Without the movable guide member 62, when the number of sheets of the sheet bundle 13a is small, as shown in FIG. 9, when the sheet bundle 13a hits the cutter 60 and is stopped for a short period of time, the sheet bundle 13a becomes a crumbled state. Then, the force by which the auxiliary transport roller 61 pushes the sheet bundle 13a toward the cutter 60 does not work effectively, and as shown in FIG.
A is wound and jams. However, when the auxiliary guide plate 63 is provided, the conveyance path after the leading end of the conveyance guide 58, that is, after the auxiliary conveyance roller 61 can be made as narrow as possible and close to a straight line, so that the bundle of paper 13a is broken as shown in FIG. This can be prevented and the pushing force of the auxiliary transport roller 61 can be effectively applied. Further, as shown in FIG. 2, the auxiliary guide plate 63 forms an appropriate gap 11b between the one input guide 59 and a sheet into which the paper can be manually inserted.

The gap 39 and the auxiliary transport roller 61
If the sheet bundle is jammed between the sheet and the sheet, it is detected by the jam detection sensor 64 shown in FIG. The presence / absence of the sheet bundle 13 on the tray portion 12 is detected by the sheet presence / absence sensor 65, and the fact that the pressure plate assembly 27 is retracted to the top dead center is detected by the top dead center sensor 66. Further, the sheet feeding device 10 is electrically connected to the shredder 11 by the connector 67, and the current detection sensor 68 can detect that the shredder 11 is overloaded and stopped.

The shredder 11 is provided with a cutter motor (not shown) when a sheet bundle having a thickness exceeding the maximum shredding capacity is loaded.
The cutter motor is automatically stopped by detecting that an overload has been applied to. The stop of the cutter motor is detected by the current detection sensor 68 on the side of the sheet feeding device 10, and the sheet feeding by the sheet feeding device 10 is stopped. Then shredder 11
On the side, the cutter 60 is rotated in the reverse direction in order to remove the sheet bundle that is caught in the cutter 60. When this rotates in reverse,
The paper bundle that has not been shredded is pushed back toward the input port 11a. When the rear end of the pushed back sheet bundle remains in the sheet feeding device 10 and is fixed by the sheet feeding device 10 as shown in FIG. 12, the sheet bundle that cannot be shredded has its own waist strength. Therefore, the sheet bundle cannot be returned to the insertion port 11a, and the leading end of the sheet bundle is released from the meshing portion of both cutters 60 by the reverse rotation of the cutters 60, and then is ejected to the outside as the cutters 60 rotate.

After such a reverse operation, the shredder 1
No. 1 stands by in a shredable state. Here, even if the shredder 11 is operated again, the tip of the sheet bundle is not shredded because it is disengaged from the meshing portion of the cutters 60. on the other hand,
Since a new sheet bundle is conveyed from the sheet feeding device 10 to the input port 11a, a jam occurs and the sheet feeding device 10 also stops.

In order to avoid such a situation, therefore, the movable guide member 62 and the auxiliary guide plate 6 extended from it.
As shown in FIG. 13, the sheet 3 is automatically opened by the force of the returning sheet bundle. That is, the movable guide member 62 is mounted on the frame 10a of the sheet feeding device 10 so as to be movable in parallel by the four left and right parallel links 69, and retracts (opens) to the upper side of the insertion port 11a while maintaining the same posture.
You can do it. The movable guide member 62 is maintained by the tension of a spring (not shown) in both the closed state shown in FIG. 12 and the open state shown in FIG.

The movable guide member 62 is designed so as not to open unless a force is applied to return a sheet bundle having a thickness greater than the maximum shredding capacity without being shredded. The reason is that, when the sheet bundle hits the blade of the cutter 60 and stops for a short time, a sheet bundle having a thickness less than the maximum shredding capacity may push the movable guide member 62. This is because the guide member 62 is not opened.

14 and 15 show another example of the movable guide member. In this case, the movable guide member 62a is made independent of the sheet feeding device 10 and is made adjustable so as to have a width corresponding to the width of the input port 11a, and is detachably set in the input port 11a for use. .. This movable guide member 62a
Has an inclined surface 62b that coincides with the guide surface of one loading guide 59, and is slidable along the loading guide 59. Further, the movable guide member 62a is provided with a magnet 71 which is attracted to the transport guide 70 hinged above the auxiliary transport roller 61, and the movable guide member 62a is closed by the attraction as shown in FIG. Held in a state. If the magnetic force of the magnet 71 is appropriately selected and no force is applied to return the bundle of sheets that could not be shredded, the movable guide member 62a
Is designed not to open as shown in FIG.

When the paper feeding device 10 is designed to feed a paper bundle having a thickness within the shredding ability of the shredder 11,
A case in which a paper bundle having a shredding capability of the shredder 11 or more is thrown in is a case where another paper bundle is thrown in by manual feeding during automatic paper feeding from the paper feeding device 10.

If the movable guide member 62 or 62a is divided into, for example, left and right parts so that the overall width and left and right directions can be adjusted, the width of the insertion port 11a may be different due to the difference in the model of the shredder 11 and the like. Can be easily dealt with.

By the way, if there is a paper bound by a stapler or the like in the bundle of papers stacked on the tray section 12, among the bound papers, there are papers conveyed by the conveyor belt 14 and papers not conveyed. May occur, and the binding portion 13b may be jammed by being caught in the cap. Therefore, the tray portion 12 is provided with a binding portion separating means that automatically separates the conveyed paper from the portion where the paper is bound by the conveyance belt 14.

That is, as shown in FIG. 16, a recess 12a is provided at the rear end of the tray portion 12, and the recess 12a is formed.
A plurality of fixed separation claws 72 are provided on the bottom surface of the above so as to be spaced from each other in the front-rear direction. When there is binding paper in the bundle of papers 13, the lower paper 13c of the binding portion 13b is conveyed by the conveyor belt 14, while the upper paper 13d.
Since the upper and lower papers 13d and 13c enter into the recess 12a so that they are rolled up, the warped portion is separated by the separation claw 72.
Engage in. When it is further conveyed by the conveyor belt 14 in this state, the upper and lower papers 13d and 13c are bound by the bound portion 13b.
Separated from. A plurality of separation claws 72 are provided in the front and rear in order to ensure the separation and to cope with the difference in the length of the stack of sheets stacked on the tray unit 12, but even if only one is provided. good.

When the number of sheets of paper on the tray portion 12 becomes small, the curving portion of the remaining sheet (upper side) of the binding sheet 13d cannot be pressed by the weight of the sheets stacked thereon, and the separating claw 72 It may not be caught in. Therefore, in such a case, as shown in FIG. 17, the binding portion 13 is formed in the vicinity of the pressing portion by the pressing plate assembly 27.
A separation hole 12b is provided at an intermediate portion of the tray portion 12 for hooking and separating b.

As another method of separation, as shown in FIG. 18, a movable separation claw 73 is detachably attached to the middle portion of the tray portion 12 so that the separation claw 7 can be removed when the stack of sheets becomes small.
3 may be projected from the upper surface of the tray portion 12 by the action of a spring (not shown), and the binding portion 13b may be hooked on this to separate them. In this case, the separation claw 73 can be rotated up and down around a fulcrum 74, for example.

[0033]

According to the present invention, even if a bundle of sheets to be shredded has stapled staples or the like, the sheets are bound on the tray portion as they are and are bound when being fed to the shredder. Since the parts can be automatically separated, it is not necessary to remove the stapler or the like in advance, and the workability of discarding confidential documents is improved.

[Brief description of drawings]

FIG. 1 is a perspective view of a state in which a sheet feeding device according to an example of the present invention is set on a shredder.

FIG. 2 is a side view showing an internal structure of the paper feeding device.

FIG. 3 is a perspective view of a mechanism for interlocking both side guide members and a mechanism for detecting an interval between the side guide members in the paper feeding device.

FIG. 4 is a side view of a pressure plate assembly.

FIG. 5 is a front view showing the inside by sectioning the same as above.

FIG. 6 is a front view of the same pressurized state.

FIG. 7 is a perspective view of a gap adjusting mechanism.

FIG. 8 is a block diagram showing an electrical configuration of the paper feeding device.

FIG. 9 is a side view of the internal structure showing that the bundle of sheets is in a state of being crumbled without the auxiliary guide plate.

FIG. 10 is a similar view showing that the sheet bundle is further rolled up from the state of FIG.

FIG. 11 is a side view of the internal structure showing that the auxiliary guide plate prevents the situation shown in FIGS. 9 and 10.

FIG. 12 is a side view of the internal structure showing a state in which the front end portion of the sheet bundle is repelled from between the cutters.

FIG. 13 is a view showing that the movable guide member is opened as shown in FIG.
It is a side view of an internal structure showing that what is shown in FIG.

FIG. 14 is a side view of the internal structure showing an example in which a movable guide member different from that in FIG. 13 is used.

FIG. 15 is a similar side view showing a state where the movable guide member is retracted.

FIG. 16 is a side view showing a state in which binding sheets are separated by separation claws fixedly provided in the recessed portion of the tray portion.

FIG. 17 is a side view showing a state in which binding sheets are separated by a separation hole provided in the middle part of the tray section.

FIG. 18 is a side view showing a state in which binding sheets are separated by a movable separation claw provided in an intermediate portion of the tray section.

[Explanation of symbols]

 10 Paper Feeding Device 11 Shredder 11a Input Port 12 Tray 12a Recess 12b Separation Hole 13 Paper Bundle 14 Conveyor Belt 39 Gap 60 Cutter 72 Separation Claw 73 Movable Separation Claw

Claims (4)

[Claims] 1. A shredder sheet feeding device in which a sheet bundle stacked on a tray section is separated by a separating / conveying section and is conveyed to an input port of a shredder, wherein the tray section is provided with a binding section for conveying the sheet bundle. A paper feed device for shredders, characterized in that binding means separating means for separating is provided. 2. The paper feeder for shredder according to claim 1, wherein the binding portion separating means is a separating claw provided in a recessed portion of the tray portion. 3. The paper feed device for shredder according to claim 1, wherein the binding portion separating means is a separation hole provided in the tray portion. 4. The paper feeding device for shredder according to claim 1, wherein the binding portion separating means is a movable separating claw provided on the tray portion so as to be retractable.