JPH0529082Y2 - - Google Patents

Description

[Detailed Description of the Invention] (Field of Industrial Application) The present invention relates to a paper shredding device for shredding paper sheets such as unnecessary documents.

(Prior Art) Conventionally, in paper shredding devices that shred paper sheets such as unnecessary documents, devices equipped with a shredding mechanism with relatively high throughput have a hopper installed at the top of the shredding mechanism. Since paper sheets were manually fed into the paper, the amount of paper sheets fed at one time was small, and the shredding mechanism was operated with a load that was too low compared to the capacity of the shredding mechanism, and the paper sheet feeding interval was Because of the long length, there is a problem in that the shredding mechanism is operated without load, making it impossible to utilize its shredding ability.

For this purpose, conventionally, a bucket cart that can be raised and lowered is attached to the side of the hopper, the paper sheets are fed to the bucket cart in the lowered position, the bucket cart is raised to the top of the hopper, and the bucket cart is overturned toward the hopper, thereby producing a large amount of paper. A method is known in which paper sheets are fed into the hopper at once, but in this case, the amount of paper sheets fed at one time is too large, causing an excessive load compared to the capacity, even temporarily. This results in the shredding mechanism being operated, and since the interval between feeding sheets becomes longer due to the elevating and lowering of the bucket, there is a problem that the time during which the shredding mechanism is operated without load becomes longer.

(Problem to be solved by the invention) As mentioned above, in the case of the conventional paper shredding device,
The shredding mechanism was often operated with a load that was too low or too high compared to its capacity, and the time when it was operated without load was long.

The present invention was developed in view of these points, and aims to improve shredding efficiency by continuously supplying paper sheets to be shredded in an amount commensurate with the capacity of the shredding mechanism, with as few gaps as possible. The present invention provides a paper sheet shredding device that can do this.

(Means for Solving the Problems) The paper shredding device of the present invention has a plurality of shredders in the width direction of the conveyor belt so as to mutually separate bundles of paper sheets conveyed at predetermined intervals on the conveyor belt. A belt conveyor having a conveyor belt provided with a partition member, and regulations disposed at a predetermined height position above the conveyor belt of this belt conveyor to exclude a portion thicker than a predetermined thickness of a bundle of paper sheets conveyed by this belt conveyor. a shredding mechanism provided at the lower end of the belt conveyor via a hopper for shredding paper sheets; A detector that detects the presence of paper sheets and generates a paper sheet presence detection signal, and also generates a paper sheet reduction detection signal when it detects that the number of sheets in the hopper is below the lower limit setting amount, and a paper sheet detection signal of this detector. A motor that is controlled by a control mechanism that outputs a stop control signal for the belt conveyor in response to a presence detection signal and outputs a drive control signal for the belt conveyor in response to a sheet reduction detection signal to operate the belt conveyor. It is.

(Function) The paper sheet shredding device of the present invention partitions and places a bundle W of paper sheets between each partition member 21 on the conveyor belt 3 of the belt conveyor 2.
is driven to pass the bundle W of paper sheets through the lower part of the regulating member 23, remove the paper sheets thicker than a predetermined thickness, and throw the paper sheets to be shredded in an amount that does not cause an overload into the hopper 31.

Then, the inserted paper sheet is shredded by the shredding mechanism 32. The paper sheets fed into the hopper 31 are detected by a detector 41, and when the number of paper sheets fed into the hopper 31 is greater than the upper limit setting amount, a paper sheet presence detection signal from the detector 41 causes a signal from the control mechanism to be detected. The motor 16 is stopped by the stop control signal, the belt conveyor 2 is stopped, and the supply of sheets to the hopper is stopped.

Further, when the number of sheets in the hopper 31 is reduced to less than the lower limit setting amount due to the shredding of sheets by the shredding mechanism 32, the motor 16 is activated by a drive control signal from the control mechanism based on the sheet reduction detection signal from the detector 41. is driven, and the motor 16 drives the belt conveyor 2 to supply shredded sheets to the hopper 31.

(Embodiment) An embodiment of the paper shredding device of the present invention will be described with reference to the drawings.

In the figure, 1 is a box-shaped main body, and a belt conveyor 2 for conveying a bundle W of paper sheets such as unnecessary documents is disposed inside the main body 1 from the front part (right side in the figure). In this belt conveyor 2, an endless conveyor belt 3 is connected to a plurality of large pulleys 4, 5, 6 for the entire inner width of the conveyor belt 3 and a plurality of pairs of small rollers 7 to 13 for the outer side edges of the conveyor belt 3. The conveying path of the portion projected to the front of the main body 1 is formed horizontally, and the conveying path of the portion located inside the main body 1 is formed upwardly sloping.

Also, by driving the large pulley 4 located at the rising end inside the main body 1 of the large pulleys 4, 5, and 6 in the counterclockwise direction shown in the figure by the motor 16 with a reduction gear, the conveyor belt 3 is The loaded stack W of paper sheets is conveyed into the main body 1 from the front part thereof. By adjusting the position of the large pulley 6 located at the descending end inside the main body 1 in the front-rear direction (left-right direction in the drawing) using the adjustment mechanism 17, the tension of the conveyor belt 3 can be adjusted and the meandering can be prevented. There is.

Further, on the outer surface of the conveyor belt 3, partition plates 21 serving as a plurality of partition members that are long in the width direction of the conveyor belt 3 are installed in the front and back direction so as to separate the bundle W of paper sheets on the conveyor belt 3 back and forth. The plurality of pairs of small rollers 7 are arranged at predetermined intervals.
It is located vertically between 13 and 13.

Further, an opening 2 formed in the front part of the main body 1
A regulating plate 2 is positioned at a predetermined height above the belt conveyor 2 and serves as a regulating member with a small gap left between it and the partition plate 21.
3 is provided in an inclined manner, and this regulating plate 23 is connected to the main body 1.
The thickness of the bundle W of paper sheets on the conveyor belt 3 entering the inside is regulated to about the height of the partition plate 21, and the portions of the paper sheets that are thicker than a predetermined thickness are excluded.

A hopper 31 is provided inside the main body 1 and has a side opening facing the tip end of the belt conveyor 2.
A shredding mechanism 32 for shredding paper sheets is provided at the lower end opening of the hopper 31. This shredding mechanism 32 has a number of disc-shaped blades (not shown) attached to a pair of shafts 33 and 34 so as to mesh with each other, and a pair of shafts are driven in the direction of the arrow by a motor 35 equipped with a speed reducer. By doing so,
A pair of shafts 33 and 34 have disk-shaped blades, and the sheet is pulled in between the blades and shredded, and the shredded sheet is discharged downward, allowing it to pass through the regulation plate 23. It has the ability to easily shred a bundle W of paper sheets of maximum thickness.

Further, a photoelectric detector 41 is provided on the side of the hopper 31 to detect paper sheets in the hopper 31, and this detector 41 detects that the number of paper sheets in the hopper 31 is greater than the upper limit setting amount. Upon detection, a paper sheet presence detection signal is generated, and when it is detected that the number of paper sheets in the hopper 31 is less than the lower limit set amount, a paper sheet reduction detection signal is generated.

The motor 16 is controlled by a control mechanism that outputs a stop control signal for the belt conveyor 2 in response to the sheet presence detection signal from the detector 41 and outputs a drive control signal for the belt conveyor 2 in response to the sheet reduction detection signal. is controlled, and by driving and stopping this motor 16, the belt conveyor 2
It is supposed to be driven and stopped.

Further, a hopper 45 is provided at the bottom of the shredding mechanism 32.
A belt conveyor 46 is provided at the bottom of the hopper 45, and a photoelectric detector 47 is provided at the side of the hopper 45 to detect paper sheets in the hopper 45. Detector 47
A motor is controlled by a control mechanism (not shown) which outputs a drive/stop signal for the belt conveyor 46 based on the detection signal, and the belt conveyor 46 is controlled to be driven or stopped by this motor.

Next, the operation of this embodiment will be explained.

To shred paper sheets, a bundle W of paper sheets is placed between the partition plates 21 on the conveyor belt 3 on the horizontal portion of the belt conveyor 2 at the front of the main body 1, and the belt conveyor 2 is driven to In this partitioned bundle W of paper sheets, paper sheets in a portion having a predetermined thickness or more are removed from the regulating plate 23.
A bundle of paper sheets having a thickness equal to or less than a predetermined amount passes through the lower part of the regulating plate 23, is carried into the main body 1, and is thrown into the hopper 31.

At this time, the belt conveyor 2 is driven intermittently one pitch at a time, with the distance corresponding to the interval between the partition plates 21 being one pitch, and the bundle W of paper sheets is transferred to the hopper 31.
When the detector 41 detects a paper sheet exceeding the upper limit setting amount, the control mechanism controls the motor 1 based on the paper sheet presence detection signal from the detector 41.
A stop control signal is output to the motor 6, and the drive of the belt conveyor 2 is stopped by stopping the motor 16.

Then, the paper sheets thrown into the hopper 31 fall into the shredding mechanism 32, are shredded by the shredding mechanism 32, and are conveyed to the belt conveyor 4 via the hopper 45.
6 falls on top.

This shredding mechanism 32 has the ability to easily shred a bundle W of paper sheets whose thickness is less than the lower limit setting amount that can pass under the regulation plate 23, and corresponds to the upper limit of the desirable load range for regular use. Since the height of the regulating plate 23 is set so that the bundle W of paper sheets is thick enough to apply an excessive load to the shredding mechanism 32, the hopper 3
Therefore, if the thickness of the bundle W of paper sheets is set to about the height of the partition plate 21,
The ability of the shredding mechanism 32 can be utilized to its maximum potential.

When the fragments of the paper leaf falling inside the hopper 45 are no longer detected, the fragments of the paper leaf are detected by the detector 47.
is detected, and based on this detection signal, the control mechanism controls the motor that drives the belt conveyor 46, and the belt conveyor 46 is driven, and the paper sheets shredded by the shredding mechanism 32 are delivered to the belt conveyor 46. Therefore, the detector 47 is transported to the next process and the hopper 4
When the small pieces of paper falling within the conveyor belt 5 are no longer detected, the control mechanism controls the motor to stop based on this non-detection signal, and the drive of the belt conveyor 46 is stopped.

Further, when the paper sheets in the hopper 31 are shredded by the driving of the shredding mechanism 32 and the number of paper sheets in the hopper 31 decreases below the lower limit setting amount, the detector 41 no longer detects the paper sheets. In response to the leaf reduction detection signal, the control mechanism outputs a drive control signal for the motor 16 again, and the belt conveyor 2 is intermittently driven one pitch at a time, and the subsequent bundle W of sheets is thrown into the hopper 31, and the detector 41 is activated. When a paper sheet exceeding the upper limit setting amount is detected, the motor 16 is activated by this paper sheet presence detection signal.
is controlled to stop, and the drive of the belt conveyor 2 is stopped again.

Therefore, when the number of sheets in the hopper 31 of the main body 1 decreases below a predetermined amount, the next bundle W of sheets is transferred to the hopper 3.
1, the shredding mechanism 32 is rarely in a no-load state and is continuously driven with an appropriate load, allowing the ability of the shredding mechanism 32 to be fully utilized. .

(Effects of the invention) According to the invention, by placing the bundle of paper sheets between the plurality of partition members on the conveyor belt of the belt conveyor, the bundle of paper sheets can be easily separated from each other, and the belt conveyor is driven. By passing the bundle of paper sheets under the regulating member, the thickness of the bundle of paper sheets fed into the hopper can be limited to a predetermined thickness, and the paper sheets fed into the hopper are shredded by the shredding mechanism. However, if the amount of paper fed into the hopper exceeds the upper limit setting, the detector detects the paper and generates a paper presence detection signal, and the belt conveyor stops to stop supplying paper. However, when the number of sheets in the hopper is shredded and the amount falls below the lower limit setting, the detector outputs a sheet reduction signal, which drives the belt conveyor to feed the next bundle of sheets into the hopper. It is possible to shred paper sheets continuously, the shredding mechanism does not operate under no load, and the paper sheets are fed to the hopper by passing the bundle of paper sheets under the regulating member. Since the thickness of the bundle of paper sheets is regulated, it is possible to limit the thickness of the bundle of paper sheets and prevent overload operation of the shredding mechanism. ,
Shredding can be performed by continuously supplying the material without any gaps, resulting in efficient shredding.

[Brief explanation of the drawing]

The figure is a longitudinal sectional view showing an embodiment of the shredding device of the present invention. W...Bundle of paper leaves, 2...Belt conveyor, 3...
... Conveyor belt, 16 ... Motor, 21 ... Partition plate as a partition member, 23 ... Regulation plate as a regulation member, 31 ... Hopper, 32 ... Shredding mechanism, 41 ... Detector.

Claims (1)

[Claim for Utility Model Registration] A belt conveyor having a conveyor belt provided with a plurality of partition members in the width direction of the conveyor belt so as to separate bundles of paper sheets conveyed at predetermined intervals on the conveyor belt. a regulating member disposed at a predetermined height above the conveyor belt of the belt conveyor to exclude a portion thicker than a predetermined thickness of the bundle of paper sheets conveyed by the belt conveyor; and a hopper at the bottom of the tip of the belt conveyor. A shredding mechanism is provided in the hopper to shred paper sheets, and a paper sheet presence detection signal is provided in the hopper to detect that the amount of paper sheets fed from the conveyor into the hopper exceeds an upper limit setting amount. and a detector that generates a paper reduction detection signal when it detects that the number of paper sheets in the hopper is below the lower limit set amount, and a stop control signal for the belt conveyor based on the paper presence detection signal of this detector. and a motor that operates the belt conveyor and is controlled by a control mechanism that outputs a drive control signal for the belt conveyor in response to a sheet reduction detection signal.