JPH0417103B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION <Industrial Field of Application> The present invention relates to adjusting the paper feed of a document shredder.

<Prior Art> Conventionally, a document shredding machine (shredder) for shredding confidential documents has only had a single paper feed port. Therefore, if an operator is continuously shredding a large amount of documents and a document that needs to be shredded urgently occurs, the operator can interrupt the process that is currently ongoing and shred the urgent document. Or, the urgent documents had to be shredded after the shredding process was completed.

However, if you interrupt the operator's processing to perform urgent shredding of documents, or if you shred documents yourself after the operator has finished shredding, there is a drawback that time is lost. .

Furthermore, if the operator is requested to perform urgent shredding of documents after the shredding process in progress is completed, there is a concern that confidential contents may be leaked.

Furthermore, providing multiple devices for shredding confidential documents and the like is wasteful in terms of cost and space.

In order to solve the above-mentioned drawbacks, the present applicant previously proposed a document shredding machine having multiple paper feed ports (Japanese Patent Application No. 105878/1982). According to this prior art,
The shredding capacity of the shredding blade (cutter roller) is 22 sheets, and the number of documents fed to the cutter roller from the first paper feed section and the second paper feed section is regulated to be 15 or less and 7 or less. It has been done. Therefore, even if documents are simultaneously fed from the first paper feed section and the second paper feed section to the cutter roller, the documents can be shredded without sending more than 23 sheets of documents to the cutter, which exceeds the shredding capacity. .

<Problems to be Solved by the Invention> However, when a document shredding machine with such a configuration performs document shredding processing using only the first paper feed section, the shredding of the cutter (shredding blade) Although it has a capacity of 22 pages, it can only shred 15 documents, so its shredding efficiency is very low.

In view of the above problems, the present invention has been made to reduce the amount of documents (shredded paper) fed from one paper feeding section to the shredding blade in a document shredding machine having a plurality of paper feeding sections. The shredding efficiency is improved by matching the shredding capacity of the paper feeder, and when paper is fed from another paper feeder, priority is given to shredding the paper to prevent the leakage of confidential document contents. The purpose of this is to prevent paper from being fed beyond the capacity of the shredding blade.

<Means for solving the problem> The problem solving means according to the present invention is as shown in the control circuit diagram in FIG. 1 and the cross-sectional view of the document shredding machine in FIG. Shredding blade 2 arranged in
and a drive device 3 for rotationally driving the shredding blade 2.
, a first paper feeding section 4 and a second paper feeding section 5 for feeding shredded paper to the shredding blade 2, a paper feeding device 7A provided in the first paper feeding section 4, and a second paper feeding section 5 for feeding shredded paper to the shredding blade 2; 1 paper feed section 4
and a first detection switch 8 and a second detection switch 9 that detect the presence or absence of paper in the second paper feed section 5, and a control device 10 that controls the paper feed device 7A based on the output signals of the detection switches 8 and 9. It is equipped with

The control device 10 has a function of outputting a signal for driving the paper feeder 7A based on the paper presence signal of the first detection switch 8, and a function of outputting a signal for driving the paper feeder 7A based on the paper presence signal of the first detection switch 8 and the second detection switch 9. It has a function of stopping the paper feeding device 7A and preferentially using the second paper feeding section 5.

<Function> In the problem solving means described above, when discarded documents are set in both the first paper feed section 4 and the second paper feed section 5, the control device 10 switches the first detection switch 8 and the second detection switch 9. In response to the paper presence signal, only the second paper feeding device 7B of the second paper feeding section 5 is driven, and processing of the document set in the second paper feeding section 5 is given priority.

When the processing of the document set in the second paper feed section 5 is completed, the second detection switch 9 outputs a no paper signal, so the control device 10 then
Processes documents set in .

Further, even while a document is being fed from the first paper feed section 4 to the shredding blade 2 and shredded, if a document is input to the second paper feed section 5, the control device 10 The first paper feeding device 7A of the section 4 is stopped, and the documents input from the second paper feeding section 5 are processed with priority.

<Example> An example of the present invention will be described below based on the drawings. FIG. 1 is a control circuit diagram of a document shredding machine which is an embodiment of the present invention, and FIG. 2 is a sectional view of the same document shredding machine.
FIG. 3 is a perspective view of the document shredding machine.

As shown in the figure, the document shredding machine includes a main body 1 of the document shredding machine.
A shredding blade 2 disposed on the upper part of the shredding blade 2, a drive device 3 for rotationally driving the shredding blade 2, a first paper feed section 4 for feeding shredded paper to the shredding blade 2, and A second paper feeding section 5, a first regulating means 6A provided in the first paper feeding section 4 for adjusting the paper feeding amount to match the shredding capacity of the shredding blade, and a first regulating means 6A provided in the second paper feeding section 5. second regulating means 6B for suppressing the amount of paper fed below the shredding capacity;
, a first paper feeding device 7A provided in the first paper feeding section 4, a second paper feeding device 7B provided in the second paper feeding section 5, and a second paper feeding device 7B provided in the first paper feeding section 4 and the second paper feeding section 4. Paper feed section 5
A first detection switch 8 and a second detection switch 9 (for example, a micro switch) detect the presence or absence of paper, and the first and second paper feeding devices 7A and 7B are controlled by the output signals of the detection switches 8 and 9. A control device 10 is provided.

The control device 10 has a function of outputting a signal for driving the first paper feeding device 7 based on the paper presence signal of the first detection switch 8, and a function of outputting a signal for driving the first paper feeding device 7.
A function of outputting a signal to drive the second paper feeding device 7B based on the paper presence signal of the first detection switch 8 and a second detection switch 9, and a function of stopping the first paper feeding device 7A based on the paper presence signal of the first detection switch 8 and the second detection switch 9. It has a function of outputting a signal for preferentially driving the second sheet feeding device 7B.

The document shredding machine mainly includes the first paper feed section 4 and the second paper feed section 5, and a first paper feed section for feeding shredded paper from the first paper feed section 4 and the second paper feed section 5. The device 7A, the second paper feed device 7B, and the first paper feed device 7
A shredding device 12 for shredding the shredded paper sent from A and the second paper feeding device 7B, and the shredding device 1
and a waste box 13 for storing the shredded paper shredded in step 2.

The first paper feeding device 7A includes rollers 14 and 15 for feeding the shredded paper set in the first paper feeding section 4 to the shredding blade 2, and a conveying device stretched between the rollers 14 and 15. It consists of a belt 16 and a first motor M1 for driving the rollers 14 and 15.

The second paper feeding device 7B includes rollers 17 and 18 for feeding shredded paper (documents) set in the second paper feeding section 5 to the shredding blade 2, and rollers 17 and 18.
The conveyor belt 19 stretched across the roller 1
and a second motor M2 for driving the motors 7 and 18. The shredding device 12 includes a pair of rotatable shredding blades 2 (cutter rollers) and a shredding motor 3A serving as a drive device 3 for driving the shredding blades 2.
etc. The shredding capacity of shredding blade 2 is 50g/
Approximately 20 sheets of ^m2 paper.

The first paper feeding section 4 is formed on the upper front surface of the main body, and can set up to 500 to 600 sheets of discarded documents at once, and has a first regulating means 6A for controlling the amount of paper fed.
consists of a reversing roller 6A disposed above the conveyor belt 16, and the interval between the conveyor belt 16 and the reversing roller 6A is adjusted so that more than 20 sheets of paper do not pass therethrough.

The second paper feed section 5 is formed in the upper part of the main body at the lower stage of the first paper feed section 4, and unlike the first paper feed section 4, it cannot set a large amount of documents, but it has a second regulation for the amount of paper fed. The means 6B consists of a reversing roller 6B disposed above the conveying belt 19, and the interval between the conveying belt 19 and the reversing roller 6B is adjusted so that more than 20 sheets of paper do not pass through it. However, the amount of documents fed by the first paper feeding section 4 may be any number of documents as long as it is less than the shredding capacity of the shredding blade 2.

Further, on the top surface of the main body 1, as shown in FIG. We are prepared.

As shown in FIG. 1, the control device 10 connects a diode 4 to an AC power source 40 via a power switch 41.
2. A rectifying and smoothing circuit consisting of a capacitor 43 and a resistor 44 is connected, and a first relay 45, a second relay 46, a shredding relay 47, and a first detection are connected to the rectifying and smoothing circuit, which are stopped when the detection switch 8 is turned on or off. relay 48 and second detection relay 49 are connected.

The first detection relay 48 has two normally open contacts 48A and 48B, and the coil 48
C is connected in series with the first detection switch 8,
Further, one normally open contact 48A is connected in series with the coil 45A of the first relay 45, and the other normally open contact 48A is connected in series with the coil 45A of the first relay 45.
8B is connected to the coil 47A of the shredding relay 47.

The second detection relay 49 has two normally open contacts 49
A, 49B and one normally closed contact 49C, whose coil 49D is connected to the second detection switch 9.
connected in series with One normally open contact 49A of the relay 49 is connected in series to the coil 46A of the second relay 46, and the other normally open contact 49B
is the other normally open contact 48B of the first detection relay 48
connected in parallel with and one normally closed contact 49
C is one normally open contact 48 of the first detection relay 48
Connected in series with A.

A normally open contact 45B of the first relay 45 is connected in series with the first motor M1. Also second relay 4
No. 6 normally open contacts 46B are connected in series to the second motor M2. Furthermore, the normally open contact 47 of the shredding relay 47
B is connected in series to the shredding motor 3A. In addition,
In FIGS. 2 and 3, 50 is a front door, and 51 is a handle.

In the above configuration, if documents are sent from both the first paper feed section 4 and the second paper feed section 5 in the direction of the shredding blade 2, the shredding blade 2 will receive a document that exceeds its shredding capacity. , the motor 3A would be overloaded, and shredding would have to be interrupted, the large amount of documents fed in would have to be taken out from the shredding blade 2, and then shredded again.

However, in the present invention, the document is configured not to be fed from the first paper feed section 4 and the second paper feed section 5 to the shredding blade 2 at the same time.

That is, if a discarded document is set in both the first paper feed section 4 and the second paper feed section 5, the second paper feed section 5
Drives only the second paper feeding device 7B of the second paper feeding section 5.
Priority is given to processing documents set to .

After the processing of the document set in the second paper feed section 5 is completed, the document set in the first paper feed section 4 is subsequently processed.

Furthermore, even while a document is being fed from the first paper feed section 4 to the shredding blade 2 and shredded, if a document is fed into the second paper feed section 5, the first paper feed section 4 will The paper device 7A is stopped, and the document input from the second paper feed section 5 is processed with priority.

The control is performed as follows. Power switch 41
When closed, diode 42, capacitor 43,
A DC voltage is obtained by the resistor 44. When paper is set in the first paper feed section 4 and the first detection switch 8 is closed, the coil 48C is energized and the normally open contact 48
A, 48B are closed.

Further, when paper is set in the second paper feed section 5 and the detection switch 9 is closed, the coil 49D is energized.
Normally open contacts 49A, 49B are closed and normally closed contact 49C is opened.

Next, the operation of each combination of ON and OFF of the detection switches 8 and 9 will be explained.

() When a document is not set in both the first paper feed section 4 and the second paper feed section 5, the switch 8
OFF, switch 9 turns OFF. Normally open contact 45
Since motors B, 46B, and 47B remain open, motors 3A, M1, and M2 remain stopped.

() When a document is set only in the first paper feed section 4, the switch 8 is turned on and the switch 9 is turned off.
Then, since the normally open contacts 48A and 48B are closed, current flows through the coils 45A and 47A, and the normally open contacts 45B and 47B are closed and the shredding motor 3A
and the first motor M1 rotates. Therefore, the first paper feeder 7A of the first paper feeder 4 and the shredding blade 2 rotate, and the second paper feeder 7B of the second paper feeder 5 rotates.
remains stopped.

() When a document is set only in the second paper feed section 5, switch 8 is turned OFF and switch 9 is turned ON. Since the normally open contacts 49A and 49B are closed, current flows through the coils 47A and 46A, the normally open contacts 46B and 47B are closed, and the shredding motor 3A and the second motor M2 are rotated. Therefore, the shredding blade 2
The second paper feeder 7B of the second paper feeder 5 rotates, and the first paper feeder 7A of the first paper feeder 4 remains stopped.

() When both the first paper feed section 4 and the second paper feed section 5 are set, switch 8 is ON and switch 9 is ON.
ON does. Therefore, normally open contacts 48A, 48
B, 49A, 49B are closed, normally open contact 49C
is opened, current flows through coils 46A and 47A, normally open contacts 46B and 47B are closed, and shredding motor 3A and second motor M2 rotate. Therefore, as in the case (), the shredding blade 2 and the second paper feeder 7B only rotate, and even if a document is set in the first paper feeder 4, the first paper feeder 7B of the first paper feeder 4 The paper device 7A does not rotate.

As described above, when a document is input into the second paper feed section 5 during the shredding process from the first paper feed section 4, the shredding of the document from the first paper feed section 4 is interrupted, and the shredding of the document from the first paper feed section 4 is interrupted. Priority is given to processing documents from the paper feed section 5. Then, when there are no more documents from the second paper feed section 5, which is being processed with priority, the shredding process of the first paper feed section 4 can be automatically restarted.

It should be noted that the present invention is not limited to the above embodiments, and it goes without saying that many modifications and changes can be made to the above embodiments within the scope of the present invention. For example, the detection switches 8 and 9 may use optical sensors instead of the micro switches as in the above embodiment.

<Effects of the Invention> As is clear from the above description, in the present invention, when a discarded document is set in both the first paper feed section and the second paper feed section, and when a document is shredded from the first paper feed section, If a document is fed to the second paper feed section even while it is being fed to the blade and shredded, the control device detects the paper presence signal from the first detection switch and the second detection switch to automatically switch the document to the second paper feed section. Only the second paper feed device is driven, giving priority to the processing of the document set in the second paper feed section, and when the processing of the document set in the second paper feed section is completed, the paper is released from the second detection switch. Since no signal is output, the control device subsequently processes the document set in the first paper feed section, so the control device processes the document (shredded paper) fed from one paper feed section to the shredding blade. Shredding efficiency is improved by matching the amount of paper to the shredding capacity of the shredding blade, and when paper is fed from another paper source, priority is given to shredding the paper to avoid secret documents. It is possible to prevent contents from being leaked and to prevent paper from being fed beyond the capacity of the shredding blade.

[Brief explanation of drawings]

FIG. 1 is a control circuit diagram of a document shredding machine according to an embodiment of the present invention, FIG. 2 is a sectional view of the same document shredding machine, and FIG. 3 is a perspective view of the same document shredding machine. 1: Main body, 2: Shredding blade, 3: Drive device, 3A:
Motor, 4: First paper feed section, 5: Second paper feed section, 6
A, 6B: Reversing roller as paper feeding amount regulating means, 7A, 7B: Paper feeding device, 8, 9: Detection switch, 10: Control device, 12: Shredding device, 13: Waste box, 14, 15, 17, 18: roller, 16, 1
9: Conveyor belt, M1, M2: Motor.

Claims (1)

[Claims] 1 A shredding blade placed on the top of the document shredding machine body,
A drive device for rotationally driving the shredding blade, a first paper feed section and a second paper feed section for feeding shredded paper to the shredder blade, and a drive device provided in the first paper feed section. a first detection switch and a second detection switch that detect the presence or absence of paper in the first paper feeding section and the second paper feeding section, and controlling the paper feeding device by an output signal of the detection switch. A document shredding machine comprising a control device.