JP3359183B2 - Shredder - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a shredder for shredding paper such as a waste document with a cutter and dropping the shredded chips into a shredder storage chamber.

[0002]

2. Description of the Related Art Conventionally, in this type of shredder, although not shown, shredded paper is stacked on a paper feeder, and the paper feeder automatically feeds the paper sequentially to a cutter, which shreds the paper. Then, the shredder after the shredding is dropped and stored in the shredder storage chamber. Thereafter, when the shredder storage chamber is full of shreds, this is detected by a shredder full detection sensor, and the driving of the cutter is automatically stopped based on the detection result.

However, in such a conventional shredder, when shredding, the shredder storage chamber is almost full of shredder, but a large amount of stacked paper is fed to the paper feeder without knowing that. If it is set, shredding is interrupted halfway, and many sheets remain in the sheet feeding device without being shredded. Then, when the user later notices this, it is necessary to discard the shredders and shred the remaining stacked paper again, which is troublesome and troublesome.

Therefore, in a conventional shredder, for example, as shown in FIG. 11, a shredded dust storage box 2 in a main body case 1 is formed of a transparent material, and a dust confirmation window 1a is provided in the main body case 1. There is a configuration in which the current amount of the accumulated shreds in the shredded dust storage box 2 can be confirmed from the dust confirmation window 1a.

[0005]

However, in such a conventional shredder, the shredder easily adheres to the shredder storage box 2 due to static electricity. There was a problem of making mistakes.

SUMMARY OF THE INVENTION It is therefore an object of the present invention to allow a shredder to clearly and easily check how much paper can be shredded until it is full.

[0007]

Therefore, according to the present invention, as shown in the following embodiment, for example, shredded paper is fed to a cutter 14, and the cutter 14 shreds the paper. In a shredder for storing shredder in the shredder storage chamber 10a and stopping driving the cutter 14 when the shredder storage chamber 10a is full of shredder, the shredder storage chamber shredding of the pile height of the chopped waste to be deposited in 10a and scrap detecting device 20 that detects stepwise until based-out full on a detection result of the debris detection device 20 KuzuOsamu
A display device 25 for displaying the number of sheets that can be stored in the delivery room 10a .

[0008]

At the time of shredding, the height of the debris accumulated in the debris storage chamber 10a is detected stepwise by the debris detection device 20, and based on the detection result of the debris detection device 20 , it is full.
The display device 25 displays the number of sheets that can be stored in the shredder storage chamber 10a until the storage time .

[0009]

Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 shows a schematic configuration of a shredder according to an embodiment of the present invention.

Reference numeral 10 in the drawing denotes a shredder main body.
The shredder body 10 has a vertically elongated box shape in the figure,
A shredder storage chamber 10a is formed at a lower portion thereof, and a shredder storage box 12 is provided in the shredder storage chamber 10a so as to be freely taken in and out. Further, a cutter 14 is provided above the shredder storage box 12. On the other hand, in the upper part of the shredder main body 10, an insertion port 10b for manual paper feeding is provided at the front left side in the figure, and a paper feeding path 10c is formed from the insertion port 10b toward the cutter 14. Further, a paper detection sensor 16 for detecting the passage of the paper is provided in the paper feed path 10c. As the paper detection sensor 16, a micro switch or the like is used. The paper feeder 15 for automatic paper feed is mounted on the shredder main body 10.

The cutter 14 is formed by engaging a pair of blades 14c and 14d having cutter axes 14a and 14b arranged in parallel. In order to transmit the driving force of the cutter driving motor 13 to the cutter 14, the motor gear 18 is meshed with the cutter gear 11 coaxial with the blade 14d via the transmission gear 19, and further coaxially with the blade 14c via the gear 11. And the cutter gear 17 of FIG.

The shredder has a partition plate 10d between the upper shredding mechanism and the lower shredder storage chamber 10a. Then, the cutter 14 is attached to the partition plate 10d.
The dust detection device 20 is attached downward at the rear.

The debris detection device 20 is a light reflection type photo sensor, and includes a light emitting unit 20a and a light receiving unit 20b. As the light-emitting unit 20a, a light-emitting diode that emits light toward the accumulated shreds is used. As shown in FIG. 2, the light receiving unit 20b includes a photodiode 21 that receives incident light, and a circuit unit 22 that senses the intensity of light received by the photodiode 21. Then, in the dust detection device 20, the intensity of the reflected light emitted from the light emitting diode and reflected by the accumulated fine particles and entering the photodiode 21 is sensed by the circuit unit 22, and the analog voltage V is changed according to the intensity of the reflected light. Output.

Further, the shredder is provided with an operation panel section 24 on the sheet feeding device 15, and a display device 25 as shown in FIG. The display device 25 is provided with an arcuate display portion having a light emitting diode (LED) in a U-shaped printing section 26. Further, a circular display section having a light emitting diode (LED) is provided outside the section 26.

Next, FIG. 4 shows an electrical configuration of the shredder. In this shredder, the control unit E controls the whole. The control unit E includes a microcomputer CP
U30 and the above-described paper detection sensor 1
6 and the dust detection device 20 and the display device 25 are connected. Then, a memory (ROM) 35 and the like are connected to the CPU 30.

The CPU 30 operates a solid state relay (SSR) 36 for driving the cutter drive motor 13 when the paper detection sensor 16 detects the passage of the paper.
Further, the driver 37 for driving the light emitting unit 20a of the dust detection device 20 is operated to turn on the light emitting diode. further,
Based on the magnitude of the analog voltage output by the light receiving unit 20b according to the intensity of the reflected light, the current accumulation amount of the shreds is determined. Then, the driver 38 of the display device 25 is operated to display the determination result of the accumulation amount by the light emitting diodes LED ダ イ オ ー ド.

As shown in the graph of FIG. 5, the output voltage of the light receiving portion 20b changes in an analog manner in accordance with the distance L between the accumulated fine chips. Therefore, the distance L is divided into a plurality of stages in consideration of the height of the shredder chips and the possible shredding amount, and the partition value Ith is obtained stepwise. The output voltage V ₁ (L: 55cm) and is set as a partition value I ₁ th between the case of a small amount in the case of Hosodankuzu without (or very small amount). Thus, the output voltage V _2: a (L 40 cm), shredded scrap is the partition value I ₂ th between the case of a small amount when the medium weight, V _3: a (L 25 cm), is shredded scrap The partition value between the case of the medium amount and the case of the large amount is defined as I ₃ th, and V ₄ (L: 10c
m) when the amount of shreds is large and overflow (full)
Is the partition value I _4th between the above case. Then, these partition values Ith are stored in the memory 35, respectively.

In the CPU 30, these partition values I
and the output amount is determined as V ₁
Determining that a Hosodankuzu without (or very small amount) when the weight, to determine a small amount when the less V ₁ or V _2, to determine that the amount of medium and when less than V ₂ or V ₃ , when the less V ₃ or V ₄ determines that the mass. Thus, when the V ₄ above, determined to be in an overflow.

Next, a case where the shredding process performed by the shredder described above is automatically controlled by the CPU 30 will be described with reference to the flowcharts of FIGS.

First, for example, the power is turned on and the CPU 3
The drivers 37 and 38 are driven by an output signal from 0. Then, as shown in FIG. 6, in step S1, the light emitting unit 20a of the shredder detecting device 20 is turned on. Then, proceeding to step S2, an analog voltage is output in accordance with the intensity of the reflected light that is reflected by the accumulated chips and enters the light receiving unit 20b, and the accumulation height of the chips is detected from the output voltage. And
The current accumulation amount is determined based on the accumulation height, and the current amount is displayed on the display device 25.

More specifically, as shown in FIG.
At a, the output voltage V of the light receiving portion 20b, compares the partition value I ₁ th~I ₄ th stored in the memory 35 as shown in FIG. Then, in step S2b, it is first determined whether or not an overflow state has occurred, and if so, step S2c
Then, all the light emitting diodes LEDＬＥＤ of the display device 25 are turned on to indicate that overflow has occurred. If not, the process proceeds to step S2d.

In step S2d, the partition values I ₁ th to I ₄
From the th, it is determined whether or not the current amount is large, and if so, the process proceeds to step S2e, in which the LED other than the light emitting diode LED of the display device 25 is turned on to indicate that it is large. If not, the process proceeds to step S2f.

In step S2f, the partition values I ₁ th to I ₄
From the th, it is determined whether or not the current amount is a medium amount. If so, the process proceeds to step S2g, where the light emitting diode LED of the display device 25 is turned on to indicate that the amount is a medium amount. If the amount is not medium, the process proceeds to step S2h.

In step S2h, the partition values I ₁ th to I ₄
It is determined whether or not the current amount is small from th, and if so, the process proceeds to step S2i, where only the light emitting diode LED of the display device 25 is turned on to indicate that it is small. On the other hand, if the amount is not small, the process proceeds to step S2j, and the display device 2
5 are all turned off.

Thus, in step S2 in FIG. 6, the process goes to the next step S3 after the processes in steps S2a to 2j shown in FIG.

In step S3, it is determined again whether or not an overflow has occurred. If so, the flow returns to step S2, and steps S2 and S2 are performed until the overflow state is not reached.
Repeat 3. If not overflow, step S4
Then, it is determined whether or not the paper detection sensor 16 is on. If the paper detection sensor 16 is not on, the process returns to step S2, and steps S2 and S3 are repeated until the paper detection sensor 16 is on. If it is on,
Proceeding to step S5, the cutter driving motor 13 is driven to rotate the cutter 14. And the blade 14c of the cutter 14
The sheet bundle is cut into pieces during 14d, and the shreds after the shredding are dropped into the shredder storage box 12 and stored therein. Then, the process proceeds to the next step S6.

In step S6, the same processing as in step S2, specifically, as shown in FIG. 7, the present amount of the shredder is determined, and the present amount is displayed on the display device 25. Then, in the next step S7, it is determined again whether or not an overflow has occurred. If not, the process proceeds to step S8. If the overflow has occurred, the process proceeds to step S9 to interrupt the shredding.

In step S8, it is determined whether or not the paper detection sensor 16 is off for a predetermined time (for example, 30 seconds). If it is not off, the process returns to step S6. If it is off, the process proceeds to step S9.

In step S9, the cutter driving motor 13 is turned off, and the shredding process is completed.

By the way, in the above-described example , the pile height of the shredded dust is detected by one dust detection device 20. However , for example, as shown in FIG.
For example, these detecting devices 20 are installed at the four corners above the shredder storage box 12, and the average value of the voltage output from each light receiving section 20b is compared with, for example, the partition value shown in FIG. A configuration for detecting the height may be adopted.

Further, in the above-described example , the light-reflection type photosensor is used as the debris detecting device, and the height at which the debris is deposited is detected stepwise. However, by using a photo-sensor of a light transmissive For example other, it may be configured to detect a similarly pile height stepwise. In this case, for example, as shown in FIG. 9, a plurality of light-emitting units 20 a are provided at predetermined height positions on the inner surface of one side of the shredder chip storage box 12, respectively.
A plurality of light receiving units 20b are provided on the inner surface facing the other side.

Further, in the above-described example , the dust detecting device 20
Display device 25 based on the detection result by
Indicated by. However, according to the present invention, the number of sheets that can be stored in the shredder storage chamber 10a until the shredder storage box becomes full is displayed on the display device based on the detection result of the similar waste detector 20. Can also. In that case,
For example, by converting A4 paper as a reference, the shredder storage chamber 10a
The number of sheets that can be stored in the printer is set in stages. Then, as shown in FIG. 10, for example, overflow, 400, 300, 200, and 100 sheets are sequentially displayed in five stages. In the case of overflow, the circular display unit 50 is turned on. In the case of 400 to 100 sheets, the horizontally long display units 51 to 54 are individually turned on.

[0033]

Therefore, according to the present invention, in a shredder, at the time of shredding, the stacking height of the shreds accumulated in the shredder storage chamber is detected in a stepwise manner by the shredder detecting device. shredded scrap until the result of detection to full-out based
Since the number of sheets that can be stored in the storage chamber is displayed on the display device, it is possible to clearly and easily check how many sheets of paper can be shredded until they are full.

[Brief description of the drawings]

FIG. 1 is a schematic configuration diagram of a shredder according to an embodiment of the present invention.

FIG. 2 is a circuit diagram of a light receiving unit of the dust detection device provided in the shredder.

FIG. 3 is a plan view of a display device provided in the shredder.

FIG. 4 is a block diagram showing an electrical schematic configuration of the shredder.

FIG. 5 is a graph showing an output voltage of the dust detection device that changes according to a distance between the accumulated dust and the cutting dust.

FIG. 6 is a flowchart related to drive control of the shredder.

FIG. 7 is a flowchart specifically explaining step S2 in FIG. 6;

FIG. 8 is an explanatory diagram showing an example in which a plurality of reflection-type debris detection devices are provided to detect the accumulation height of shredded debris.

FIG. 9 is an explanatory diagram showing an example of detecting the accumulation height of fine chips by a light transmission type chip detection device.

FIG. 10 is a plan view of a display device used to display the amount of waste that can be stored.

FIG. 11 is an external perspective view of a conventional shredder having a dust checking window.

[Explanation of symbols]

 10a Shredded waste storage room 14 Cutter 20 Waste detection device 25 Display device

──────────────────────────────────────────────────続 き Continuation of the front page (56) References JP-A-60-153301 (JP, A) JP-A-62-161602 (JP, A) JP-A-5-88637 (JP, U) (58) Survey Field (Int.Cl. ⁷ , DB name) B02C 18/00-18/44

Claims (1)

(57) [Claims] 1. A shredded sheet is sent to a cutter, the sheet is shredded by the cutter, and the shredded chips after the shredding are stored in a shredded chip storage chamber. A shredder for stopping the driving of the cutter when it is full, a dust detecting device for detecting a stacking height of the shreds accumulated in the shredded dust storage chamber in stages, and a detection result of the dust detecting device. in the housing Allowed to the shredded waste storage chamber until the full-out based
A shredder comprising: a display device for displaying the number of active sheets .