JP2002028516A - Volume reduction device for waste from shredder - Google Patents

Abstract

PROBLEM TO BE SOLVED: To reduce the volume of paper wastes slenderly cut with an usual shredder by a low cost and small-size device and ensure the reliability of the device. SOLUTION: A compression case 30 with an opening part 11 formed on the top is arranged below a shredder device 10 and a screw conveyor 20 is arranged inside the compression case 30. The screw conveyor 20 is activated in such a fashion that it is interlocked with the shredder device 10. On the other hand, the compression case 30 has a blockage wall formed at a forward position and a pressure sensor 50 is arranged on the blockage wall. Further, below the nearby part of the blockage wall, an open/close door 60 to be activated by a pressure switch is provided. In addition, in the neighborhood of the opening part 11 of the compression case 30, a tank 41 for dripping a treating liquid containing a coagulant is arranged, and a solenoid valve 43 is provided in the fluid channel of the treating liquid.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a device for compressing (reducing the volume) of a paper piece cut by a shredder device, and more particularly to a structure for reducing the volume by using a screw conveyor.

[0002]

2. Description of the Related Art There is a problem in that a piece of paper cut by a shredder device is bulky at the time of disposal. For this reason, various techniques for reducing the size of the shredder device and reducing its size have been proposed.

[0003] For example, Japanese Patent Application Laid-Open No. 06-079250 discloses that water containing a surfactant added to a cut piece of paper is poured, the paper piece is wound up with a shaft, the shaft is removed, and the volume of the paper piece is reduced by a compressor. Is disclosed. Since the cut piece of paper contains water, compression is easy.

Japanese Patent Laid-Open Publication No. 2000-071097 discloses a two-stage compression process of preliminary compression and main compression.
A technique for batch processing a large amount of cut paper pieces has been proposed.

On the other hand, Japanese Patent Application Laid-Open No. H11-229284 discloses a technique for compressing cut paper pieces using a screw mechanism. In principle, as shown in FIG. 6, a finely cut piece of paper 1 is put into a hopper 2 and the falling piece of paper 1 is pushed into a front sealed chamber 6 by a screw rotating body 3. The pushed-in paper piece 1 is cut at an appropriate timing by the compression adjusting mechanism 4, and at the same time, a discharge opening is opened to collect the paper waste 5 of an appropriate length.

[0006]

The invention described in Japanese Patent Application Laid-Open No. 06-079250, in which water is injected into a cut piece of paper and compressed, has good compression efficiency. However, a multi-stage mechanism is required in which after the paper sheet is wound by the shaft, the winding shaft is extracted and the volume is reduced by another compressor. Further, the invention described in Japanese Patent Application Laid-Open No. 2000-071097 has a two-stage configuration of pre-compression and main compression, so that the size of the apparatus is easily increased as a whole.

On the other hand, the invention described in Japanese Patent Application Laid-Open No. 11-229284 using a screw mechanism is excellent in that the paper is forcibly fed by the screw mechanism. This is because the volume can be appropriately reduced by a one-stage mechanism, and the device can be downsized.

Incidentally, Japanese Patent Application Laid-Open No. 11-229284 describes
The invention according to the item (1) uses a concept of a compression adjusting mechanism (4) when removing the compressed paper piece. This involves cutting the compressed paper piece at an appropriate position in order to take out the compressed paper piece from the front of the closed chamber (casing), controlling the opening and closing movement of the leading end opening, and pushing out the cut compressed paper piece.

However, the structure in which the cut compressed chips are pushed forward has a problem as an actual device. In order to extrude the compressed waste forward, the compressed waste must be completely separated and cut, and if the separation and cutting are insufficient, uncompressed waste will be extruded together from the front. In addition, as a result of the constant pressure applied to the door, the door opening / closing mechanism may be damaged, leading to a failure.

SUMMARY OF THE INVENTION An object of the present invention is to reduce the volume of a piece of paper cut by a popular shredder device by a low-cost small mechanism, and to ensure its reliability.

[0011]

In order to achieve the above object, a shredder waste volume reducing device according to the present invention comprises a compression case having an opening at an upper portion below a shredder device. The rotating body of the screw transporter is arranged inside, and the screw transporter is operated in conjunction with the shredder device, while the compression case has a closing wall at a front position in the transport operation direction of the screw transporter, The closing wall includes a pressure sensor, and a lower portion near the closing wall is provided with an opening / closing door that opens and closes at a predetermined timing when the pressure switch exceeds a predetermined threshold. In the vicinity,
A tank for dropping a processing liquid containing at least a water-soluble coagulant is provided, and an electromagnetic valve is provided on the flow path of the processing liquid, and the electromagnetic valve is opened in conjunction with the shredder device.

[0012] A cutter device for cutting compressed chips is disposed at an appropriate position of the compression case, and the cutter device is
It may be operated based on the pressure switch, and the opening and closing door may be opened after the operation of the cutter device is completed.

[0013] It is desirable that the rotating body of the screw conveyor has a spiral blade with a sharp cutter at the tip. The opening provided in the upper part of the compression case may include a plurality of arch-shaped cutters arranged at appropriate intervals so as to straddle the rotating main body of the screw conveyor.

[0014]

The apparatus according to the present invention compresses a cut piece of paper discharged downward from the shredder device by a screw conveyor. At that time, a water-soluble coagulant is added to enhance the compressibility.

The apparatus according to the present invention is provided below the front of the compression case when a paper piece compressed by the screw conveyor presses a pressure sensor disposed in front of the compression case with a force of a predetermined pressure or more. Open the door and discharge the piece of paper downward. Since the opening / closing door is disposed on the lower side, excessive pressure is not applied, and the probability of occurrence of a failure is reduced. Further, even if the compressed debris is not completely separated and cut, only the compressed debris solidified by the processing liquid falls by gravity, so that the structure can be simplified even when a cutter mechanism is provided. This is because the distance of the forward / backward movement or the vertical movement of the cutter can be reduced.

The capacity of reducing the volume of cut paper sheets depends on the capabilities of the screw conveyor and the pressure sensor. Since the opening / closing door for discharging the compressed debris (a piece of paper) is provided on the lower surface of the compression case, there is no restriction on the compression density or the like. As a result, the volume reduction efficiency of the paper piece is significantly improved. In the case where the cutter device is provided, the order of driving the cutter device and the opening / closing door may be either first or simultaneous. If the compression case is small, no cutter device is required.

It is desirable that the screw rotating body for compressing the paper piece is a cutter having a sharp tip at the spiral blade. This is because the paper piece cut into a long and thin shape by a normal shredder device is cut into smaller paper pieces so that the paper piece can be pressure-fed to a subsequent compression process.

Further, it is desirable that a plurality of arch-shaped cutters be arranged at the open portion of the compression case so as to straddle the screw rotating body. This is because the paper piece cut into an elongated shape by the shredder device can be cut more finely together with the rotational pressure feeding movement of the screw rotating body.

[0019]

FIG. 1 shows an embodiment of a shredder waste volume reducing apparatus according to the present invention. This volume reducing device is a device that cuts an elongated paper piece discharged from a popular type shredder device 10 into small pieces and compresses and solidifies it. A compression case 30 is arranged below the shredder device 10, and a screw rotation A body 20 is provided.

It is necessary to directly communicate with the screw rotating body 20 directly below the shredder device 10, and this portion is set as an open portion 11. In order to prevent the paper piece from dropping, the lower side is a tray portion 14. In the following description, “rear” and “front” mean rearward and forward with respect to the transport direction of the screw rotating body 20.

The screw rotating body 20 includes a driving motor 21
And is driven to rotate in a fixed direction via a reduction gear mechanism 22. These (20 to 22) constitute the screw transport device according to the present invention. When a hydraulic motor is used as the drive motor 21, the reduction gear mechanism 22 is not required. The screw rotating body 20 includes a rotating shaft 26 and a spiral blade 27, and the outer peripheral edge of the spiral blade 27 desirably has a sharp cutter structure. This is for cutting the slender paper piece into finer pulverized paper pieces. For example, a lathe screw for punching a wooden plate or a metal plate.

It is desirable to arrange a substantially vertical compression plate 28 at the tip of the screw rotating body 20. This compression plate 2
Numeral 8 is for pressing the cut piece of paper forward to apply pressure. However, since it is necessary to allow the cut piece of paper to flow freely forward, a necessary gap is provided at an appropriate position. Preferably, the compression plate 28 is kept free of movement of the rotating shaft 26 by means of a bearing. Of course, they may be rotated together.

At a position behind the compression plate 28, there is provided means for dropping a processing liquid to make it easier to compress the cut paper pieces. The configuration includes a processing liquid tank 41, a distribution pipe 42, and an electromagnetic valve 43. The treatment liquid contains a water-soluble coagulant as a main component, and preferably contains a liquid fuel (for example, kerosene) and a dark ink. Both may be trace amounts,
The liquid fuel is used to increase the flammability of the processing result (compressed cut paper piece), and is a dark color ink (for example, black ink).
Is a means for securing the confidentiality of the document content to be compressed. In addition, a diluted water-soluble coagulant alone is sufficient for the function of enhancing the compression performance. Solenoid valve 43
The distribution pipe 42 is linked to the operation of the shredder device 10.
Is opened with a predetermined throttle (opening degree). Usually closed.

In front of the compression case 30, a pressure detecting mechanism 50 and an open / close switch 53 for opening and closing the open / close door 60 in accordance with the pressing force of the pressure detecting mechanism 50 are provided.

The opening / closing door 60 is provided in front of the compression plate 28 and in a range slightly behind the position where the pressure detecting mechanism 60 has advanced most. Since it is a door for discharging the compression product, an opening of an appropriate size is formed in the lower surface portion of the compression case 30 and a door capable of closing the opening is provided. The control is performed by an open signal from 53. After the opening movement, the opening and closing door 60 may be closed at a predetermined timing. It is desirable to use an electric motor for opening and closing the opening door 60. This is because the structure can be simplified. The type of the opening / closing door 60 is not limited, such as one-sided opening, two-sided opening, and sliding opening.

For the degree of compression of the cut piece of paper, a normal pressure sensor for detecting the film pressure may be used. However, in view of the fact that a high pressure load is repeatedly applied, it is preferable to employ a mechanical pressure producing means in the case of the present invention in order to prevent breakage and malfunction. Since pressure is evenly applied to the rear wall 51b, there is also an advantage that biased pressure detection can be prevented.

For this reason, in this embodiment, the pressure detecting mechanism 5
0 is constituted by a cylindrical case 51, a spring coil 52, and a protruding piece 55 provided at the rear center of the cylindrical case 51. The outer peripheral shape of the cylindrical case 51 is the compression case 3
It matches the inner peripheral shape of 0 (it does not necessarily have to be circular). Due to the pressure of the cut piece of paper pressed forward by the compression plate 28, the cylindrical case 51
Move forward against Then, when the protruding piece 55 moves forward and presses and closes the circuit of the open / close switch unit 53 (regardless of whether the switch portion is turned on or off), the open / close door 60 is opened.

Therefore, according to this configuration, as shown in FIG. 2, the elongated paper piece discharged from the shredder device 10 is further finely cut by the screw rotating body 20, and the small piece waste M is compressed in the compression case 30 and solidified. Can be Prior to compression, the processing liquid is dropped through the distribution pipe 42, so that the pressed and compressed debris surely forms a lump and does not separate and separate. The degree of compression by the screw rotating body 20 can be detected by the pressure detection mechanism 50 and the open / close switch unit 53, and when the pressure exceeds a predetermined threshold value, FIG.
The opening / closing door 60 is opened as shown in FIG.

In the subsequent process, one or several solidified small pieces M may be sealed in a resin bag or the like using, for example, an automatic sealing machine. In this case, it is desirable to automatically detect the sealing timing of the resin bag by counting the number of times the opening and closing door 60 is opened and closed.

FIG. 4 shows the opening 11 on the upper side of the pan 14.
Next, a case in which a plurality of bow-shaped cutters 70 are laid is illustrated. It is preferable that the gap between the arcuate cutter 70 and the screw rotating body 20 is smaller than the gap. For example, it is 3 to 10 mm. Of course, this numerical value may be appropriately changed in design according to the size of the screw rotating body 20 and the cutting scale of the shredder device 10.

According to this configuration, the shredder device 1
Strips of paper (shredder waste) that flow down from 0
When it is moved laterally by the screw rotating body 20, it is sandwiched between the arcuate cutter 70 and the spiral blade 27 and is finely cut at an appropriate position. Therefore, even when the outer peripheral end of the spiral blade 27 is not a sharp blade, the slender paper piece is cut finely, so that the equipment cost of the spiral blade 27 can be reliably reduced.

In the present invention, since a water-soluble coagulant (diluted water-soluble glue) is used, it is easy to solidify the debris M into a compact. Therefore, the compression plate 28 does not necessarily need to be provided.

FIG. 5 exemplifies a cutter device 80 for cutting a piece of paper in the compression case 30. The cutter device 80 includes, for example, a motor 81 and a disk cutter 82 driven to rotate by the motor 81. 83
Is a slit provided at an appropriate position of the compression case 30, and the disc cutter 82 is guided by the slit 83 to move up and down (or to advance and retreat).

As described above, the apparatus of the present invention compresses a paper piece with the processing liquid and drops it from the opening / closing door 60 provided on the front lower surface of the compression case 30.
When 0 is small, the cutter device 80 is not required. However, the compression case 30 to be practically used is required to have a certain size. In such a case, a thick columnar piece of paper waste may fall by dragging a paper not yet compressed. The cutter device 80 cuts the paper debris at a predetermined depth so that the paper debris can be smoothly dropped. Practically, the diameter of the compressed columnar paper waste is 30 to 80.
The problem can be solved by making a cut of about%. It does not require 100% cutting unlike the conventional device that extrudes from the front.

The cutter is not limited to a disk cutter, but may be a push-down cutter or an endless track cutter. For safety, it is desirable to provide a protective cover on the outer periphery of the cutter.

[0036]

As described above, according to the shredder waste volume reducing device according to the present invention, a paper piece that has been cut long and thin by a popular type shredder device can be reduced in volume by a low-cost small mechanism. Operational reliability can be sufficiently ensured.

[Brief description of the drawings]

FIG. 1 is a side sectional view illustrating the structure of a volume reducing device according to the present invention.

FIG. 2 is a diagram illustrating a compressed state in the volume reducing device shown in FIG. 1;

FIG. 3 is a diagram exemplifying removal of debris from the volume reduction device shown in FIG. 1;

FIG. 4 is a diagram illustrating a cutter near a screw rotating body according to the present invention.

FIG. 5 is a diagram illustrating a state where a cutter device is provided in the present invention.

FIG. 6 is a diagram showing an example of a conventional volume reduction device.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 10 Shredder apparatus 11 Opening part 14 Receiving part 20 Screw rotating body 21 Drive motor 22 Reduction gear mechanism 26 Rotating shaft 27 Spiral wing plate 28 Compression plate 30 Compression case 41 Tank 42 Distribution pipe 43 Electromagnetic valve 50 Pressure detection mechanism 53 Opening / closing switch part 51 Cylindrical case 52 Spring coil 55 Projection piece 60 Opening / closing door 70 Bow cutter 80 Cutter device 81 Motor 82 Disk cutter 83 Slit

Claims (5)

[Claims] A compression case having an opening at an upper portion is disposed below a shredder device, and a rotating body of a screw transporter is disposed inside the compression case, and the screw transporter is linked with the shredder device. On the other hand, the compression case includes a closing wall at a front position in a transfer operation direction of the screw transfer device, a pressure sensor is provided on the closing wall, and a pressure switch is provided at a lower portion near the closing wall. When a threshold value is exceeded, an opening / closing door that opens and closes at a predetermined timing is provided, and a tank for dropping a processing liquid containing at least a water-soluble coagulant is disposed near the opening of the compression case, and An electromagnetic valve is provided on the flow path of the liquid, and the electromagnetic valve is opened in conjunction with the shredder device. Dust scrap volume reduction device. 2. A shredder waste according to claim 1, wherein a cutter device for cutting the compressed waste is disposed at an appropriate position of the compression case, and the cutter device is operated based on the pressure switch. Volume reduction equipment. 3. The opening / closing door according to claim 1, wherein the opening / closing door opens after the operation of the cutter device is completed.
The shredder waste volume reduction device described in the above. 4. The shredder chip volume reducing device according to claim 1, wherein the rotating main body of the screw transporter has a tip portion of a spiral blade formed as a sharp cutter. 5. The open part provided at the upper part of the compression case is provided with a plurality of arch-shaped cutters arranged at appropriate intervals so as to straddle the rotating main body of the screw conveyor. Item 2. A shredder waste volume reducing device according to Item 2.