JP2001009305A - Paper leaf shredder - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a paper leaf shredder wherein a lateral shredded width of paper leaves to be shredded can be set according to a necessary security level. SOLUTION: A paper leaf shredder is equipped with a pair of cutter rollers 3 and 4 longitudinally shredding paper leaves charged from an introduction opening 2; a spiral cutter 8 spirally formed around a rotary shaft; a flat cutter 9 wherein paper leaves shredded by the cutter roller are supplied, and shredded laterally together with the spiral cutter; rotary driving means 13 and 15 rotarily driving a pair of the cutter rollers and the spiral cutter; and a lateral width controlling means 31 capable of controlling the lateral shredded width of the paper leaves laterally shredded by the spiral cutter and the flat cutter.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a sheet shredding device (shredder) for shredding waste documents and the like, and more particularly, to a horizontal shredding width of sheets to be shredded.

[0002]

2. Description of the Related Art A paper shredding device is a device for shredding documents and the like in order to maintain confidentiality of the documents and the like to be discarded.

[0003] A general sheet shredding device includes a type that shreds only in the vertical direction, a type that shreds in the vertical direction and the horizontal direction at the same time, and a type that shreds in the vertical direction and further shrinks in the horizontal direction. There is a two-stage type to cut off. In each of the types, the shredding width of the paper sheet to be shredded was fixed.

[0004] The shredding width of a sheet to be shredded is related to the security level, and the shredding width requiring a high security level needs to be finely shredded. There is no need to reduce the width.

[0005]

Conventionally, the shredding width of one sheet shredding device is fixed, so that the shredding width is uniformly fixed regardless of the required security level. Shredding over a single device with low shredding power but high security level,
Since the shredding power is high, but the shredding is performed by a device having a low security level, the width of the horizontal shredding cannot be properly set according to the required security level.

In addition, a plurality of types of sheet shredding devices are installed,
Office space was running out.

SUMMARY OF THE INVENTION Accordingly, an object of the present invention is to solve the above-mentioned problems of the prior art, and to provide a sheet shredding apparatus capable of setting a horizontal shredding width of sheets to be shredded according to a required security level. To provide.

[0008]

In order to achieve the above object, a sheet shredding apparatus according to the present invention comprises a pair of cutter rollers for vertically shredding a sheet fed from an input port, and a rotating roller. A spiral cutter spirally formed around an axis, a flat cutter to which papers shredded by the cutter roller are supplied and shredded in a horizontal direction together with the spiral cutter, the pair of cutter rollers and the spiral It is characterized by comprising a rotation driving means for rotating and driving the cutter, and a width control means for controlling a width of the paper sheet horizontally cut by the spiral cutter and the flat cutter. The lateral width control unit includes a rotation speed control unit that controls the rotation driving unit so that the rotation speed of at least one of the pair of cutter rollers and the spiral cutter can be changed. The rotation driving unit includes a first motor that rotationally drives the pair of cutter rollers and a second motor that rotationally drives the spiral cutter, and the rotation speed control unit includes the first motor and the second motor. The rotation speed of one of the motors is controlled. Among the first motor and the second motor, a motor whose rotation speed is controlled by the rotation speed control means is driven by an inverter.
The rotation drive unit includes a drive motor that rotates one of the pair of cutter rollers and the spiral cutter. The rotation speed control unit controls the drive force of the drive motor by the pair of cutter rollers and the spiral cutter. And a speed change transmission means for shifting and transmitting the other speed to the other. The width control means includes a data table programmed to randomly change the rotation speed of at least one of the pair of cutter rollers and the spiral cutter, and the pair of cutter rollers and the spiral based on the data table. Rotation speed control means capable of controlling the rotation speed of at least one of the cutters.

In the above-mentioned invention, the width of the paper sheet cut in the horizontal direction can be controlled by the width width control means. The horizontal shredding width can be set.

In this case, by controlling the rotation driving means by the rotation speed control means, it is possible to easily change the rotation speed of at least one of the pair of cutter rollers and the spiral cutter.

[0011] By adjusting the rotation speed of the pair of cutter rollers, the supply speed of the paper sheets supplied to the spiral cutter and the flat cutter is adjusted, and the lateral cut by the spiral cutter and the flat cutter in the horizontal direction. The shredding width is adjusted.

By adjusting the rotation speed of the spiral cutter, the timing at which the paper sheets supplied from the pair of cutter rollers at a constant speed are cut by the spiral cutter and the flat cutter is adjusted.

[0013] Further, controlling the rotation speed of at least one of the pair of cutter rollers and the spiral cutter based on a data table programmed to randomly change the rotation speed of at least one of the pair of cutter rollers and the spiral cutter. By this, the width of the paper shreds is randomly changed and shredded, and it is almost impossible to collect the shredded papers once and reproduce the papers before shredding , An extremely high security level can be obtained.

[0014]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of a paper sheet shredding device according to the present invention will be described below with reference to the drawings.

As shown in FIG. 1, an input port 2 for inputting paper sheets to be cut is provided diagonally on the upper surface of the main body 1 of the paper sheet shredding apparatus. The cutter rollers 3 and 4 are provided so as to mesh with each other, and the rear end portion of the insertion port 2 is just opposed to the meshing portion. As shown in FIG. 7, the cutter rollers 3 and 4 are such that disk-shaped cutter blades are attached to the rotating shafts 5 and 6 at equal intervals.

A horizontal cutter device 7 is provided below the meshing portion of the cutter rollers 3 and 4. The horizontal cutter device 7 includes a spiral cutter 8 having a spiral blade and a flat cutter 9. As shown in FIG. 8, the spiral cutter 8 has a shaft 10 provided with a spiral cutter blade 11. In addition, the flat cutter 9 has a flat cutter blade 19 at the tip end, for example, having a triangular cross section.

The cutter rollers 3 and 4 are connected to a first motor 13 via a chain 12 or a gear system, and are driven by the rotation of the first motor 13. The spiral cutter 8 is connected to a second motor 15 via a chain 14 or a gear system, and is driven by rotation of the second motor 15. The motors 13 and 15 have an output of about several hundred watts. When a paper sheet is inserted from the insertion port 2, the paper input sensor detects this and the motors 13 and 15 are automatically started. Thereby, the cutter rollers 3 and 4 and the spiral cutter 8 rotate. The inserted paper sheets are cut vertically by the cutter rollers 3 and 4 into, for example, a line having a width of about 3 mm to 6 mm. The linearly shredded paper sheets are guided into the horizontal cutter device 7 and further cut short in the horizontal direction. The trimming length is determined by the number of revolutions of the spiral cutter 8 and is about 10 mm to 35 mm. The paper sheets (shredded scraps) thus finely cut fall into a scrap container 16 provided at a lower portion of the apparatus.

In the sheet shredding device described above, in the present invention, as shown in FIG. 1, the width of the sheet shredded horizontally by the spiral cutter 8 and the flat cutter 9 can be controlled. The horizontal width control means 30 is provided. Here, the width of the paper sheet is defined as a pair of cutter rollers 3,
4 refers to the width in the horizontal direction when the sheets cut in columns are cut into rows in a direction substantially perpendicular to the columns. As described below, the width control means 30 allows the width of the paper sheet to be set in accordance with the required security level.

A specific embodiment will be described below. As shown in FIG. 1, the lateral width control means 30 includes a rotation speed control means 31 capable of variably controlling the rotation speed of one of the first motor 13 and the second motor 15 as the rotation driving means. ing.

FIG. 1 shows a case where the rotation speed of the first motor 13 is controlled by the rotation speed control means 31. The first motor 13 is driven by an inverter. The second motor 15 is an inexpensive ordinary motor, and has a constant rotation speed. The rotation speed control means 31 controls the number of rotations of the first motor 13 by controlling the inverter frequency of the first motor 13 driven by the inverter.

When the rotation speed of the first motor 13 changes,
After the paper sheets are cut in the vertical direction by the pair of cutter rollers 3 and 4, the supply speed at which the sheets are supplied to the horizontal cutter device 7 changes, and the supply speed at which the paper sheets are supplied to the horizontal cutter device 7 changes. Since the rotation speed of the spiral cutter 8 is set to be constant, the spiral cutter 8 and the flat cutter 9
And the width of the horizontal shredding changes.

Instead of driving the first motor 13 in an inverter and variably controlling it to rotate the second motor 15 at a constant speed, the first motor 13 is driven to rotate at a constant speed and the second motor 15 is rotated. May be driven by an inverter, and the rotation speed may be variably controlled by the rotation speed control means 31. In this case, after the paper is cut in the vertical direction by the pair of cutter rollers 3 and 4, the supply speed at which the paper sheets are supplied to the horizontal cutter device 7 is constant, but the spiral cutter 8 is
Is variably controlled, so that the width of the horizontal cutter cut by the spiral cutter 8 and the flat cutter 9 changes.

According to the above-described embodiment, conventionally, it was only cut into columns having a width of 2 mm or 3 mm, or was cut into a fixed size of 2 mm × 16 mm or 3 mm × 40 mm. On the other hand, according to the above-described embodiment, for example, it is possible to shred the pieces into a size of 3 mm × (1 mm to 20 mm), and it is possible to variably set the width of the shred in the horizontal direction within the range of (1 mm to 20 mm). become.

Next, another specific embodiment will be described with reference to FIGS. In the present embodiment, the rotation speed control means 31 of the lateral width control means 30 includes a speed change means 37 as described below. While the above-described embodiment uses two motors 13 and 15, this embodiment uses only one first motor 13 and a pair of cutter rollers 3 and 4.
And the spiral cutter 8 are driven. The second motor 15 is not provided.

The drive shaft of the first motor 13 is the chain 12
Is connected to the rotating shaft 6 of the cutter roller 4.
The rotating shaft 6 of the cutter roller 4 and the rotating shaft 5 of the cutter roller 3
Are connected by a reversing gear 35. Also, the rotating shaft 5 of the cutter roller 3 and the rotating shaft 1 of the spiral cutter 8
Between 0, a transmission means 37 is provided. The speed change means 37 includes a speed change pulley 38 mounted on the rotation shaft 10 of the spiral cutter 8, a speed change pulley 39 mounted on the rotation shaft 5 of the cutter roller 3, a speed change pulley 38, and a speed change pulley 39. And a connecting belt 40.

FIGS. 4 and 5 show the principle of operation of the speed change means 37. FIG. As shown in FIG. 5, the pulley interval of the shift pulley 38 is adjusted in the direction of arrow B by adjusting the pulley interval of the shift pulley 38 in the direction of arrow A. By setting the pulley interval of the transmission pulley 38, the rotation speed of the cutter roller 3 and the rotation ratio of the spiral cutter 8 are set, and the rotation speed of the spiral cutter 8 is set.
The width of the paper sheet is set.

The pulley interval of the speed change pulley 38 is adjusted by hydraulic drive or electric drive. For example, by selecting an adjustment switch (not shown) according to a security level displayed on a display panel (not shown), the pulley interval adjustment of the shift pulley 38 corresponding to a desired security level is set. In addition, instead of adjusting the pulley interval of the transmission pulley 38 by hydraulic drive or electric drive, as shown in FIG.
It is also possible to attach the manual handle 41 to the speed change pulley 38 and operate the manual handle 41 to adjust the pulley interval of the speed change pulley 38.

In FIG. 4, the belt 40 shows a state where the rotational speed of the spiral cutter 8 is increased.
a shows a state where the rotation speed of the spiral cutter 8 is reduced.

In the example shown in FIG. 2, the first motor 1
3 is transmitted to the cutter roller 4 and then the rotational speed of the spiral cutter 8 is adjusted via the speed changing means 37. However, instead of this example, the driving of the first motor 13 is performed. Power is first transmitted to the spiral cutter 8,
After that, the rotation speed of the cutter rollers 4 and 5 may be adjusted by transmitting the signal to the cutter roller 5 by a speed change unit.

Next, still another specific embodiment of the present invention will be described. In the present embodiment, as shown in FIG.
Rotation speed control means 31 capable of variably controlling the rotation speed of
A rotation speed random table 42 is provided. The rotation speed random table 42 randomly specifies the rotation speed of the first motor 13 with reference to, for example, a random number generation table. The rotation speed random table 42 includes a first motor 1
Any data table may be used as long as the data table is randomly arranged in a range where a desired security level can be ensured so as not to impose an excessive burden on the driving of No. 3. In addition, the rotation speed random table 42 may have, for example, a certain time zone with a certain horizontal shred width and a different time zone with another certain horizontal shred width during a day. Good.

The rotation speed random table 42 has a data table programmed to randomly change the rotation speed of the first motor 13 in time series. The rotation speed control means 31 refers to the rotation speed random table 42 and controls the rotation speed of the first motor 13 driven by the inverter. As a result, the rotation speed of the first motor 13 is controlled at random, so that the width of the paper sheet is randomly changed in a time-series manner. Since the horizontal shredding width of paper sheets is randomly changed and shredded, it is almost impossible to collect once shredded paper sheets and reproduce the paper sheets before shredding , An extremely high security level can be obtained.

In the above description of the embodiment, an example has been described in which either one of the cutter rollers 3, 4 and the spiral cutter 8 is variably controlled, but the cutter rollers 3, 4 and the spiral cutter 8 are not controlled. Both rotation speeds may be variably controlled, so that a higher security level can be ensured.

In the above description, an example has been shown in which the rotation speed control means 31 controls the first motor 13 as the rotation drive means as the width control means for controlling the width of the paper sheet. However, the present invention is not limited to this, and any other means may be used as long as the width of the paper sheet is controlled.

[0034]

As described above, according to the structure of the present invention,
Since there is provided a width control means capable of controlling the width of the paper shredded horizontally by the spiral cutter and the flat cutter, various types of paper shredding devices can be used in accordance with the security level. Can be set.

Further, by controlling the rotation driving means by the rotation speed control means, the rotation speed of at least one of the pair of cutter rollers and the spiral cutter can be easily controlled.

In addition, the rotational speed of at least one of the pair of cutter rollers and the spiral cutter is controlled based on a data table programmed to randomly change the rotational speed of at least one of the pair of cutter rollers and the spiral cutter. As a result, it is almost impossible to collect the shredded paper sheets and reproduce the uncut paper sheets, and it is possible to obtain an extremely high security level.

[Brief description of the drawings]

FIG. 1 is a diagram showing the upper inside of an embodiment of a paper sheet shredding device according to the present invention.

FIG. 2 is a schematic configuration diagram showing another specific example of the rotation speed control means transmission means of the paper sheet shredding device according to the present invention.

FIG. 3 is a sectional view corresponding to FIG. 3;

FIG. 4 is a view for explaining the principle of gear shifting in which the rotational speed of a spiral cutter is adjusted.

FIG. 5 is a view for explaining the principle of a speed change means.

FIG. 6 is a block diagram illustrating another embodiment of the paper sheet shredding device according to the present invention.

FIG. 7 is a view showing a pair of cutter rollers.

FIG. 8 is a diagram showing a spiral cutter.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Paper shredder main body 2 Input port 3, 4 Cutter roller 8 Spiral cutter 9 Flat cutter 12, 14 Chain 13 First motor 15 Second motor 30 Width control means 31 Rotation speed control means 37 Transmission means 38 Transmission pulley 39 Transmission follower pulley 40 Belt 41 Manual handle 42 Rotation speed random table

Claims (6)

[Claims] 1. A pair of cutter rollers for vertically cutting paper sheets inserted from an insertion port, a spiral cutter spirally formed around a rotation axis, and a paper sheet cut by the cutter rollers. A flat cutter to which paper sheets are supplied and shred in a horizontal direction together with the spiral cutter; a pair of cutter rollers and a rotary drive unit for driving the spiral cutter to rotate; and a horizontal cutter by the spiral cutter and the flat cutter. A paper sheet shredding device comprising: a width controller for controlling a width of a sheet to be shredded. 2. The apparatus according to claim 1, wherein said lateral width control means includes a rotation speed control means for controlling said rotation drive means so as to change a rotation speed of at least one of said pair of cutter rollers and said spiral cutter. A sheet shredding device according to claim 1. 3. The rotation driving means includes a first motor for driving the pair of cutter rollers to rotate and a second motor for driving the spiral cutter to rotate, and the rotation speed control means includes a first motor. 3. The motor according to claim 2, wherein the control unit controls the rotation speed of one of the first motor and the second motor.
A sheet shredding device according to claim 1. 4. The paper according to claim 3, wherein a motor whose rotation speed is controlled by said rotation speed control means among said first motor and said second motor is driven by an inverter. Leaf shredding device. 5. The rotation driving means includes a driving motor for rotating one of the pair of cutter rollers and the spiral cutter, and the rotation speed control means controls a driving force of the driving motor by the pair of cutters. 3. The sheet shredding device according to claim 2, further comprising a speed change transmission unit that performs speed change transmission to the other of the roller and the spiral cutter. 6. A data table programmed to randomly change the rotation speed of at least one of the pair of cutter rollers and the spiral cutter, based on the data table. 2. The sheet shredding device according to claim 1, further comprising a rotation speed control unit configured to control a rotation speed of at least one of the cutter roller and the spiral cutter.