JPH07136538A - Shredder - Google Patents

Abstract

PURPOSE:To eliminate a motor continuing to revolve by a presence signal to a material to be shredded only although the material to be shredded does not travel by both signals of a detection signal by the presence or absence of the material to be shredded and a detection signal of a feeding state of the material to be shredded by a feeding mechanism for the shredded to be shredded. CONSTITUTION:When a material to be shredded is thrown in a throw-in hole 3, the presence or absence of the material to be shredded is detected by a material to be shredded detection mechanism 6 to rotate a motor 10. Cutters 9 driven by a driving belt 11 are rotated, and feed rollers 7 and driven rollers 8 are rotated, W with the rotation of the cutters 9, allowing the A material to be shredded 3 to be shredded. The material to be shredded detection mechanism 6 emits light toward the material to be shredded by its light emitting element and receives the light reflected from the material to be shredded by its light receiving element, allowing signals to be obtained. The signals are compared at specified time intervals to always monitor a feeding state of the material to be shredded.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an unnecessary document shredding device, ie, a shredder, which can detect the feeding state of a shredded object such as a document.

[0002]

2. Description of the Related Art In a conventional shredder having a general shredded object feeding mechanism, a shredded object detection mechanism is provided at a document inlet to turn on a motor when a shredded object is detected.
The cutter linked with the motor is rotated, and the object to be shredded is fed and shredded by the shredded object feeding mechanism. At that time, if the shredded object is stopped during the feeding due to paper jam, etc., a shredded object detection mechanism is provided between the shredded object feeding mechanism and the cutter as a motor stop mechanism to detect the presence or absence of the shredded object. There is known a method of detecting or traveling of a shredded object by detecting the presence or absence of a signal of an encoder interlocking with the roller by contacting the roller with a sheet, and stopping the motor by the detection signal.

[0003]

However, according to the above-described conventionally known method, when the shredded object detection mechanism is provided between the shredded object feeding mechanism and the cutter, the shredded object is simply cut. If the object to be shredded is stopped even though the object to be shredded is present even though the object to be shredded is present in the input port, the object to be shredded detection object is shredded at a certain point in time. Since the motor is turned on by detecting the presence or absence of
Even though the shredded object cannot be sent to the cutter, the cutter remains rotating.

Further, when the roller is brought into contact with the paper and the encoder is interlocked, a mechanism for bringing the roller into contact with the paper becomes important and a mechanical contact mechanism is required.

An object of the present invention is to solve the above problems and to provide a shredder having an efficient shredder feeding mechanism for detecting the presence or absence of shredded matter with the passage of time.

[0006]

DISCLOSURE OF THE INVENTION The present invention is directed to a charging port for charging a shredded object on the upper surface of a main body, a shredded object feeding mechanism section for sending the shredded object toward a cutter, a cutter and a motor. In a shredder having a shredding portion for shredding objects to be shredded, a light emitting element that emits light of a specific wavelength and a light receiving element that receives light of the specific wavelength are respectively shredded on the side surface of the input port. A drive circuit which is provided toward an object and drives the light emitting element, a conversion circuit which converts the intensity of the light received by the light receiving element into a signal, the light of the light emitting element being reflected by an object to be shredded, and a conversion circuit. Output means for outputting that the object to be shredded is in the input port when the value becomes a certain value or more, and the conversion value during shredding of the object to be shredded by the cutter is a certain value or more and a constant time interval If there is a fluctuation in the When the output means for outputting that the object to be shredded has been sent to the shredder, and the conversion value during shredding is not less than a certain value and does not change at a certain time interval, Output means for outputting that the object to be shredded is clogged at the input port, the object to be shredded feed mechanism part or the shredder part, and the conversion value during shredding is constant. And an output means for outputting that the shredded object is not in the input port when the value is less than or equal to the value.

[0007]

According to the above-mentioned means, the presence or absence of the object to be shredded and the object to be shredded are detected by only one set of the detection method composed of the light emitting element that emits light and the light receiving element that receives the light. When the object to be shredded is sent to the cutter by the feed mechanism, it is possible to detect the running of the object to be shredded by non-contact monitoring of the undulating vibration state of the object to be shredded. do not need.

[0008]

DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described with reference to the drawings.

FIG. 1 is a schematic structural diagram of a shredder according to one embodiment of the present invention, and FIG. 2 shows a state of a light emitting element / light receiving element and a shredder from the upper part of the shredder in one embodiment of the present invention. FIG.

The shredder of the present embodiment is such that the shredder 3 is provided on the upper part of the main body 1 and the shredder 2 is irradiated with light and the reflection is received to receive shredder 2. The shredded object detection mechanism 6 including a light emitting element 4 and a light receiving element 5 for detecting the presence or absence of a shredded object, a shredded object feeding mechanism including a feed roller 7 and a driven roller 8, and a shredded object feeding mechanism. A cutter 9 for shredding the scraps 2, a motor 10 for rotating the cutter 9,
Drive belt 11 for interlocking the motor 10 and the cutter 9
And a storage box 12 for storing shredded objects.

The operation of the shredder configured as above will be described. The shredded object detection mechanism 6 is installed in the main body 1 as shown in FIG. 2, the light emitting element 4 and the light receiving element 5 are housed in the holder 13, and the tips of the elements are parallel so as to face the shredded object 2. , Fixed at an angle. An electric circuit diagram for obtaining a detection signal by the shredded object detection mechanism 6 is configured as shown in FIG. The light emitting element 4 sets the light emission level by the fixed resistor 14. The light receiving element 5 reflects the light emitted from the light emitting element 4 on the shredded object 2, receives the reflected light, and converts the intensity of the light into an electric signal by the converter 15. The electric signal level is set by the fixed resistor 16, the DC voltage signal is shaped by the filter 17, and the DC voltage signal is converted by the A / D converter 18 into a digital signal. The digital signal as the shredded object detection signal thus obtained is sent to the CPU (C
internal Processing Unit) 19
To enter.

The control of the CPU 19 will be described with reference to the flowchart of FIG. 4 showing the control of the shredder in this embodiment.
When the power of the shredder is first turned on, the CPU 19 constantly monitors the output of the A / D converter 18, and the output level of the light receiving element 5 (DATA: hereinafter referred to as output level) is a preset shredded object. 2 is compared with whether or not it is larger or smaller than the shredded object detection level A, which is the boundary between the level with 2 and the level without 2. If the output level is lower than the shredded object detection level A (DATA <A), the shredded object 2 is present in the inlet 3.
If not, the motor 10 is stopped. After that, the output of the A / D converter 18 is continuously monitored. Output level is higher than shredded object detection level (DATA>
A) and the motor 10 are rotated, and the feed roller 7, the driven roller 8 and the cutter 9 are rotated in association with the rotation of the motor 10, and the shredded object 2 is shredded and stored in the storage box 12.

Further, the CPU 19 takes in the output level, compares the level B with the detection level A of the shredded object, and if it is smaller than the detection level of the shredded object (B <A), the shredded object 2 of the input port 3 is It is judged that all the pieces have been shredded, and the motor 10 is stopped. If the output level is higher than the shredded object detection level (B> A), the data is reserved 500
After the mS interval, the output level is set to CPU1 again.
Reference numeral 9 compares the level C taken in with the detection level A of the shredded object and stops the motor 10 if it is smaller than the detection level of the shredded object (C <A). If the output level is higher than the shredded object detection level (C> A), the data is converted to the above-mentioned 5
If there is no change in the data compared to the data secured before the interval of 00 mS (B = C), or if there is only a change in the degree of error on the circuit, the shredded object 2 is not shredded normally and the input port It is determined that the process is stopped at 3 and error processing is performed. The motor 10 is stopped for safety as error processing. When there is a change in the data (B ≠ C), it is determined that the object to be shredded 2 is normally shredded without stopping at the input port 3, and the output data is read at an interval of 500 mS. The same comparison process as is repeated.

As described above, it is possible to detect the presence or absence of the object to be shredded at the inlet and the traveling state of the object to be shredded by the pair of the light emitting element and the light receiving element.

[0015]

As described above, according to the present invention,
With only one set of detection means composed of a light emitting element that emits light and a light receiving element that receives light, both the presence or absence of an object to be shredded at the inlet and the traveling state of the object to be shredded are detected, and It is possible to provide an efficient shredder that eliminates the inconvenience that the motor continues to rotate only with the presence of the signal of the shredded object regardless of the shredded object not traveling.

[Brief description of drawings]

FIG. 1 is a diagram showing an internal structure of an embodiment of a shredder according to the present invention.

FIG. 2 is a view of a shredder detection mechanism seen from above.

FIG. 3 is an electric circuit diagram of a shredder detection mechanism of the shredder.

FIG. 4 is a flowchart showing control of the shredder.

[Explanation of symbols]

 1 main body 2 shredded object 3 input port 4 light emitting element 5 light receiving element 6 shredded object detection mechanism 8 driven roller 9 cutter 10 motor 18 A / D converter 19 CPU

Claims (2)

[Claims] Claim: What is claimed is: 1. An input port for throwing an object to be shredded on an upper surface of a main body, a shredded object feeding mechanism section for sending the shredded object toward a cutter, and a shredded object such as a cutter and a motor. In a shredder having a shredding portion for cutting, a light emitting element that emits light of a specific wavelength and a light receiving element that receives light of the specific wavelength are respectively provided on the side surface of the input port toward the shredded object, and the light emission is performed. A drive circuit for driving the element, a conversion circuit for converting the intensity of the light received by the light receiving element into an electric signal, the light of the light emitting element being reflected by an object to be shredded, and the conversion value exceeds a certain value. At this time, the output means for outputting that the object to be shredded is in the input port, and when the conversion value during the shredding of the object to be shredded by the cutter is equal to or more than a certain value and fluctuates at certain time intervals, If the scrap is from the input port, Output means for outputting the fact that it has been sent to the shredding section, and when the conversion value during shredding is not less than a certain value and does not change at a certain time interval, the object to be shredded is the input port or Outputting means for outputting the fact that the shredded object feeding mechanism section or the cutting section has clogged the shredded object, and the shredded object when the conversion value during shredding becomes a predetermined value or less. And a means for outputting that there is not at the input port. 2. When the object to be shredded is being shredded by a cutter, when the conversion value of the conversion circuit is equal to or greater than a certain value and does not fluctuate at certain time intervals, it is output that the object to be shredded is clogged. The shredder according to claim 1, wherein a motor for driving the cutter is stopped by the output means.