JP2001259458A - Cut wastepaper transport device and shreder containing the same - Google Patents

Abstract

PROBLEM TO BE SOLVED: To transport cut wastepaper resulting from cutting an unnecessary paper sheet, etc., stably into a compression chamber. SOLUTION: At a front end of a spiral shaft of a spiral conveyer 8 for transporting the cut wastepaper accumulated in a hopper so as to press it into a hold chamber, a leading end of a spiral part is formed into a rising part 39 from the center side of the spiral shaft to an outer peripheral side. When assuming a reference line perpendicular to the rotational direction of the spiral shaft for transportation (the reference line in the radial direction of the spiral shaft), the rising part 39 is formed of a curve or a straight line the more outer peripheral side of which leaves gradually farther in the direction opposite to the rotational direction from the reference line, regarding the reference line. Then, the cut wastepaper is transported by a screw 7 into a compression cylinder, when the transportation proceeds on and the high-density compression of cut wastepaper occurs, or when the screw tip part abuts on the curved line or straight line part and presses the compressed cut wastepaper, revolution of a shaft part is allowed and it is hard to become the loading at the time of the transportation of the cut wastepaper.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a paper cutting waste conveying apparatus for stably conveying paper cutting waste obtained by cutting unnecessary paper and the like into a compression chamber, and a shredder including the same.

[0002]

2. Description of the Related Art Conventionally, a shredder has been used as means for cutting unnecessary paper. The shredder is mainly provided in an upper slot for feeding unnecessary paper, a cutter for cutting the inserted unnecessary paper, and a storage unit for storing paper cutting chips cut in several millimeters by the cutter. It is configured separately. The paper cuttings cut by the cutter naturally fall into the lower storage section in the shredder and are sequentially deposited, and each time the storage section is full of naturally dropped paper cuttings, the paper cutting waste is taken out of the storage section. To be discarded. Since the paper cuttings that fall naturally are deposited in a state where air is mixed in, the content of the volume is almost air even if it should be full. Since the storage area is a limited space area, the storage space is quickly filled with paper cuttings occupying most of the volume.

[0003]

As means for solving this problem,
The shredder equipped with a compression mechanism compresses the paper cuttings and removes the air mixed in.The compression rate is low. There is a disadvantage that the cutting of the paper must be temporarily interrupted and the compression and the cutting cannot be performed simultaneously.

A method of directly compressing paper cuttings using water or a solvent has also been tried, but it is difficult to control the water content, and there is a problem in dealing with decay, mold, odor and the like. Further, when compressing paper cuttings, a hydraulic cylinder may be used to increase the compression ratio. However, there is also a problem in that the speed required for compression is reduced, and oil leakage due to a failure in sealing the cylinder and the piston rod is also a problem. In addition, additional equipment for generating hydraulic pressure is required separately, which increases the size of the apparatus and increases installation costs.

[0005] Further, with the rotation of the shaft of a spiral conveyor installed at the lower part of the hopper, the paper cutting waste is conveyed to a compression cylinder for compressing the paper cutting waste by a screw spirally attached to the main body. I have. Normally, a spiral conveyor is a screw formed by, for example, spirally attaching a strip-shaped iron plate to a bar-shaped conveyor body and welding the screw, and a tip portion of the screw in the transport direction, that is, a spiral start portion of the screw tip is formed in the strip shape. Is a cut (square) state of the iron plate. Then, as the conveyance by the spiral conveyor proceeds and the paper cuttings accumulate in the compression cylinder, the density of the paper cuttings in the compression cylinder gradually increases, and the angular tip of the screw attached to the main body of the spiral conveyor. The part will compress the paper cuttings. The compression of the paper cutting debris by the tip of the screw hinders the rotation of the shaft, and as a result, the screw becomes a resistance and becomes a load for the rotation of the shaft, and the rotation is stopped (locked). As a result, paper cutting waste cannot be supplied from the hopper.

Therefore, the present invention does not use water or a solvent, enables simultaneous processing of compression and cutting, has a high compression ratio of paper cutting waste, a high compression speed, and has a problem of oil leakage. It is intended for shredders that do not work. SUMMARY OF THE INVENTION It is an object of the present invention to provide a paper cutting waste conveying device for stably conveying paper cutting waste obtained by cutting unnecessary paper and the like into a compression chamber, and a shredder including the same.

[0007]

Means for Solving the Problems and Action / Effect In order to solve the above problems, a paper cutting waste conveying device of the present invention pushes the cut paper cutting waste into a storage chamber for storing the paper cutting waste. The spiral conveyor is a main body of the spiral conveyor, and has a spiral portion, and a tip of a spiral shaft that is rotationally driven is configured to face the housing chamber through a predetermined opening, and the spiral shaft is provided. At the tip of the spiral portion is formed so that the start end of the spiral portion rises at a predetermined height from the center side of the spiral shaft to the outer peripheral side,
Further, the spiral portion continues to the proximal end side of the spiral shaft, and the rising portion forming the starting end of the spiral portion of the spiral shaft has a reference line (the above-mentioned line perpendicular to the rotation direction for the conveyance of the spiral shaft). (A reference line in the radial direction of the spiral shaft), which is characterized by being formed in a direction opposite to the rotation direction along a curve or a straight line whose distance from the reference line gradually increases toward the outer peripheral side.

Preferably, the rising portion forming the starting end of the spiral portion of the spiral shaft preferably has a reference line perpendicular to the rotation direction for the conveyance of the spiral shaft (a reference line in the radial direction of the spiral shaft). ) Is formed along a curve having a tangent to a straight line inclined in the opposite direction to the rotation direction. The spiral conveyor is for transporting the cut paper cuttings to a compression chamber for compressing the paper cuttings, and the tip of the spiral shaft faces the compression chamber through a predetermined opening. I have.

[0009] With the rotation of the shaft portion of the spiral conveyor, paper cutting waste is conveyed to the compression chamber by a spiral portion (screw) formed on the spiral shaft. Then, as the paper cutting waste accumulates in the compression chamber as the conveyance progresses, the density of the paper cutting waste in the compression chamber gradually increases, and the cutting end of the screw attached to the main body of the spiral conveyor is accumulated. The debris will be pressed gradually.

However, the tip of the screw attached to the body of the spiral conveyor in the conveying direction,
That is, the rising portion of the screw tip is formed along a curve or a straight line in which the distance from the reference line gradually increases toward the outer peripheral side in the direction opposite to the rotation direction with respect to the reference line in the radial direction of the spiral shaft. Therefore, even if the density of the paper cuttings increases, the load of rotation of the shaft hardly occurs. That is, since the screw start portion of the screw tip is not in an angular state in which, for example, an iron plate spirally welded to the conveyor body is cut, even if compression occurs due to high density of paper cutting chips, the screw tip portion is compressed. The rotation of the shaft portion is allowed while the cut paper scraps abutted and pressed by the rising portions, so that a load is hardly generated when the paper scraps are conveyed.

Further, the shredder of the present invention comprises a cutting section for cutting paper, the above-mentioned paper cutting chip conveying device for sending the cut paper cutting chips to a compression chamber, and a paper cutting chip in the compression chamber. And a compression device for performing compression.

As a preferred example, the compression device includes a hollow rotary shaft that is rotated by a compression motor,
A toggle shaft which is screwed to the rotating shaft with the axial direction being the up and down direction and which moves up and down, a link whose upper end is loosely fitted to a central pivot, and connects this link to the rear portion of the pressing member The pressing member is configured to be able to advance and retreat into the compression chamber.

As a preferred example, the compression chamber is open at both ends in the compression direction and is movable in the compression direction. During compression, the opening at one end in the compression direction is closed by contacting the side wall, The paper cutting chips are compressed by the pressing member that advances from the opening at the other end.

As a preferred example, the discharge port is formed such that, after compression, a compression chamber opened at both ends in the compression direction is separated from the pressure receiving member in the direction of the pressing member, which stands back in the compression chamber, and cuts paper. During the movement together with the dust block, the paper cutting dust block is brought into contact with the front surface of the pressing member, and is dropped and discharged from the rear space of the compression chamber separated from the pressure receiving member.

While the paper cutting waste is being conveyed to the compression chamber by the spiral conveyor, new paper can be cut by the cutter and temporarily stored in the hopper. That is, since the spiral conveyor extrudes spirally from the detected paper cuttings by rotation of the shaft, a gap of only the extruded paper cuttings is generated in the hopper, and the newly cut paper cuttings are formed. The waste can be stored.

At this time, the processing speed at which the paper inserted from the insertion slot is cut by the cutter and the speed at which the paper cuttings are compressed in the compression chamber do not follow, and the processing speed at which the paper is cut does not match the paper cutting speed. Even if the processing speed is higher than that for compressing the paper, the cutting processing can be continued until the paper cutting waste becomes full in the hopper, and the processing capacity as a shredder can be maintained.

Further, when compressing the paper cutting waste, when the compression mechanism is constituted by connecting the rear part of the pressing member which advances and retreats in the compression chamber to the toggle mechanism, the compression motor is driven to move the compression rod in the compression direction. By moving forward, the compression ratio of the paper cuttings in the compression chamber can be increased, and the compression speed can be increased. After the compression of the paper cutting block, the compression chamber is separated from the pressure receiving member and the paper cutting block is dropped from the space generated between the pressure receiving member and the compression chamber, so that the discharge mechanism can be simplified.

Further, according to the above shredder, since no water or solvent is used, there is no problem of moisture control, and no problems such as spoilage, mold, odor and the like naturally occur. In addition, since no hydraulic cylinder is used, no oil leakage occurs, no additional equipment such as a hydraulic circuit is required, and the apparatus can be simplified.

[0019]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, embodiments of the present invention will be described with reference to the embodiments shown in the drawings. In FIG. 1, the shredder of this embodiment has a main body case 1 formed in a rectangular parallelepiped shape, a so-called box shape as a whole, a cutting mechanism (not shown) installed in the main body case 1, and a main body case 1. , A hopper 2, a compression mechanism 3, a storage section 4, and the like are respectively installed.

In the upper part of the main body case 1, an insertion slot 5 for inserting unnecessary paper such as stationery and documents is provided. The paper inserted from the insertion slot 5 is cut into small pieces of about several mm by a known cutting mechanism in which a number of cutters (not shown) are attached to a cutter shaft (not shown). The paper cutting waste 6 cut by the cutting mechanism falls naturally and is temporarily stored in the hopper 2.

As shown in FIG. 1, the hopper 2 has an upper part opened at least corresponding to the length of the cutting mechanism, and has a substantially inverted trapezoidal side sectional shape and a substantially inverted trapezoidal sectional shape. It is formed in a triangular shape. The hopper 2 is attached adjacent to the side of the main body case 1,
Spiral conveyor 8 with screw 7 mounted in a spiral
Are installed in the depth direction of the main body case 1. One end of a shaft portion 9 of the spiral conveyor 8 (a rear portion in the depth direction of the main body case 1) protrudes from a lower opening of the hopper 2 and is attached to a spiral conveyor motor 10.

On the other hand, four guides 12 are laid in parallel with each other in a direction perpendicular to the axial direction of the spiral conveyor 8 within the space between the support frames 11 on the other end side of the shaft portion 9. The compression cylinder 13 is formed of, for example, a rectangular cylindrical body, and four corners 14 of the outer frame are supported by being inserted into the four guides 12. The side of the compression cylinder 13 facing the lower part of the hopper 2 is opened and communicates with the lower part of the hopper 2. Further, both ends in the compression direction of the compression cylinder 13 are open on the entire surface.
One opening of the compression cylinder 13 is normally in contact with the side wall 15 and is closed. Also, from the other opening of the compression cylinder 13,
A compression rod 16 inserted and supported by the book guide 12 can be moved forward and backward by a toggle mechanism 17.

One embodiment of the toggle mechanism 17 is shown in FIG.
This will be described with reference to FIGS. A compression motor 19 is mounted on a frame 18 provided on the opposite side of the spiral conveyor 8 in a reverse direction. At a position close to the compression motor 19, a hollow rotary shaft 20 is supported via a bearing 21 installed on the underframe 18. A chain sprocket or pulley 22 of the compression motor 19;
A chain or belt 24 is wound around the chain sprocket or pulley 23 of the rotating shaft 20, and the rotating shaft 2
0 follows the drive of the compression motor 19. Rotary axis 2
A receiving portion 25 having a female screw portion is attached to the upper end of 0, and a toggle shaft 26 having a male screw portion formed on the outer periphery is screwed to the receiving portion 25 with the axial direction being the vertical direction. . On the other hand, a pair of receiving members 27 are attached to the left and right sides of the rear part of the compression rod 16 and the side wall 15 located on the opposite side of the compression rod 16. This pair of receivers 2
7, one end of a link 28, which is a pair of upper and lower and left and right sides, is pivotally supported via a mounting shaft 29. Each link 28
Is pivotally supported at approximately the center by a coupling shaft 30 to form a four-bar link. The upper end of the toggle shaft 26 is connected to an upper connecting shaft 30 forming a four-bar link.
Is loosely fitted to the support tool 31 inserted through the support member 31. Therefore, if the rotation shaft 20 is rotated forward, the toggle shaft 26 moves downward with the female screw portion as a base point. At this time, since the upper end of the toggle shaft 26 is loosely fitted to the support 31, the link 28 is contracted and closed by pulling down the upper coupling shaft 30, and the compression rod 16 is moved to the compression cylinder 13.
Go inside. Conversely, when the rotating shaft 20 is reversed, the toggle shaft 26 moves upward, the upper connecting shaft 30 is pushed up via the support 31 to expand the link 28, and the compression rod 16 is moved inside the compression cylinder 13. Retreat.

As shown in FIG. 5, a discharge motor 32 is provided on the support frame 11, and a chain wheel 34 attached to a drive shaft 33 of the discharge motor 32 and a chain wheel attached to a driven shaft 35. The compression cylinder 13 is configured to be movable along the guide 12 via a mechanism such as a ball screw, a trapezoidal screw, or a rack and pinion (none of which is shown) that extends over a chain 37 between the compression cylinder 13 and the guide cylinder 12. .
The storage opening of the storage section 4 is a space formed when the compression cylinder 13 moves and separates from the side wall 15. The paper cutting waste block 38 compressed in the compression cylinder 13 from this storage opening is formed. Will fall.

As shown in FIG. 7, the tip of the screw 7 attached to the main body of the spiral conveyor 8 in the transport direction, that is, the rising portion 39 which forms the start of the spiral portion at the tip of the screw 7, is provided with a spiral shaft. Is formed along a curve or a straight line in which the distance from the reference line gradually increases toward the outer periphery in a direction opposite to the rotation direction with respect to a reference line perpendicular to the rotation direction (radial reference line of the spiral axis). Have been. That is, the spiral start portion at the tip of the screw 7 is formed not as an angular state obtained by cutting an iron plate spirally welded to the conveyor 8 main body, but as the above-described rising portion 39. Therefore, even if the paper cutting waste 6 is compressed due to the high density, the screw 7
The shaft 9 is allowed to rotate while the tip 6 is pressed against the rising portion 39 while pressing the compressed paper cuttings 6, so that the paper cuttings 6 are less likely to become a load when the paper cuttings 6 are transported.

Accordingly, the paper inserted from the insertion slot 5 is cut by a known cutter of a cutting mechanism, and the cut paper cuttings 6 are temporarily transferred onto a spiral conveyor 8 installed at a lower portion in the hopper 2. Are sequentially stored. With the cutting of the paper by the cutter, a predetermined amount of paper cutting waste 6 is placed in the hopper 2.
When it is detected by a cutting waste detection sensor (not shown),
The spiral conveyor motor 10 rotates to drive the spiral conveyor 8. Shaft 9 of spiral conveyor 8
Is rotated, it is conveyed in a state where it is helically extruded from the paper cuttings 6 deposited on the screw 7 at the leading end into the compression cylinder 13.

Then, as the conveyance by the spiral conveyor 8 proceeds and the paper cuttings 6 accumulate in the compression cylinder 13, the density of the paper cuttings 6 in the compression cylinder 13 gradually increases, and the spiral conveyor 8 The rising portion 39 formed at the tip of the screw 7 attached to the main body of the present invention gradually presses the accumulated paper cuttings 6. As described above, even if the compression of the paper cutting waste 6 due to the high density occurs, the rotation of the shaft 9 is performed while the leading end portion of the screw 7 abuts and presses the compressed paper cutting waste 6 by the rising portion 39. This allows the paper cutting waste 6 to be hardly loaded when transported.

The spiral conveyor motor 10 is provided with a torque fluctuation detector (not shown). Accordingly, when the inside of the compression cylinder 13 becomes full of the paper cutting waste 6 as shown in FIG. Will be detected. Instead of this detection operation, it is also possible to detect that the current has fluctuated to a predetermined current value by a current fluctuation detector (not shown) connected in the middle of the wiring of the spiral conveyor motor 10.
Along with these detection operations, the driving of the spiral conveyor motor 10 is stopped, and the conveyance of the paper cutting waste 6 into the compression conveyor 13 is stopped.

Next, when the compression motor 19 is driven, the toggle mechanism 17 operates. That is,
If the rotation shaft 20 is rotated forward, the toggle shaft 26 moves downward with the female screw portion as a base point. At this time, the toggle shaft 2
6 is loosely fitted to the support 31, the link 28 is contracted and closed by pulling down the upper connecting shaft 30, and the compression rod 16 is guided by the four guides 12 and the compression cylinder 13. Start moving forward inside. On the way,
As shown in FIG. 8B, the paper cutting waste 6 that has been conveyed into the compression cylinder 13 is pressed by a compression rod 16 and is compressed in a space formed by the compression cylinder 13 and the side wall 15, and The cutting waste block 38 is formed.

The compression motor 19 is provided with a torque fluctuation detector (not shown). Therefore, when the paper cutting waste 6 is compressed in the compression cylinder 13,
The torque fluctuation detector detects that the torque has changed to a predetermined torque amount. Instead of this detection operation, a change in the current value to a predetermined value may be detected by a current change detector (not shown) connected in the middle of the wiring of the compression motor 19. Along with these detection movements, the drive of the compression motor 19 is stopped, and the compression movement of the compression rod 16 in the compression cylinder 13 is stopped.

After the compression of the paper cutting waste 6 is completed, the compression rod 16
To release the compression force. For this reason, the toggle mechanism 17 is operated, and as shown in FIG. 9A, the compression rod 16 is slightly retracted using the guide 12 as a guide. That is, when the rotation shaft 20 is reversed by the compression motor 19, the toggle shaft 26 moves upward, the upper coupling shaft 30 is pushed up via the support 31, the link 28 is expanded, and the compression rod 16 is moved. The inside of the compression cylinder 13 is retracted.

Next, the discharge motor 32 is driven,
A mechanism such as a ball screw, a trapezoidal screw, or a rack and pinion (both not shown) is operated. Thus, the compression cylinder 13 is guided by the guide 12 to guide the side wall 1.
5 and moves in the direction of the compression rod 16 (anti-compression direction). During the movement of the compression cylinder 13, the paper cutting block 38 that has been moving together with the compression cylinder 13 comes into contact with the front surface of the compression rod 16 that has been retracted, and is stopped. Since the compression cylinder 13 continues to move thereafter, the paper cutting waste block 38 has no supporting portion at the lower end.
As shown in FIG. 2B, the compressed air drops from the rear portion of the compression cylinder 13 separated from the side wall 15 to the storage portion 4 and is discharged.

In order to discharge the paper cutting waste block 38, the compression force applied to the compression rod 16 is released after the compression rod 16 is completely compressed by the paper cutting waste 6, but the compression cylinder 13 is moved first. And then the compression rod 16
Even if the compressive force applied to is released, the paper cutting waste block 38 can be dropped into the storage section 4 and discharged in the same manner as described above. In any case, since the compression cylinder 13 and the compression rod 16 used for the compression are used for discharging the paper cutting waste block 38 in a different manner, the shredder can be made compact.

The paper cuttings 6 are transferred to a spiral conveyor 8.
While the paper is being conveyed to the compression cylinder 13, new paper can be cut by the cutter and temporarily stored in the hopper 2. That is, the spiral conveyor 8 is spirally extruded from the detected paper cuttings 6 by the rotation of the shaft 9, so that a gap of only the extruded paper cuttings 6 is generated in the hopper 2. The cut paper cutting waste 6 can be temporarily stored. At this time, if the processing speed for cutting the paper inserted from the insertion slot 5 by the cutter and the speed for compressing the paper cutting waste 6 in the compression cylinder 13 do not follow, the processing speed for cutting the paper is:
Even if the processing speed for compressing the paper cuttings 6 exceeds the processing speed, the cutting processing can be continued until the paper cuttings 6 become full in the hopper 2, and the processing capacity as a shredder can be maintained. .

Although the present invention has been described based on paper cuttings of unnecessary paper, the present invention is not limited to this. It can be applied and applied to Further, the shape of the compression cylinder of the present invention has been described as a rectangular cylinder, but it is optional to change it to another form such as a cylinder.

[Brief description of the drawings]

FIG. 1 is a perspective view showing an entire shredder of the present invention.

FIG. 2 is a partially cutaway enlarged plan view of FIG. 1;

FIG. 3 is an enlarged front view partially cut away of FIG. 1;

FIG. 4 is a partially cutaway enlarged plan view of FIG. 3;

FIG. 5 is an enlarged side view partially cut away of FIG. 1;

FIG. 6 is an enlarged sectional view of a main part showing a state in which paper cuttings are transported to a compression cylinder

FIGS. 7A and 7B are a side view and a front view, respectively, showing a screw state of the spiral conveyor; FIG.

FIG. 8 is an operation explanatory view (a) showing a compression step in a compression cylinder, and an operation explanatory view (b) showing the same compression step.

FIG. 9 is an operation explanatory view (a) showing a compression step in the compression cylinder, and an operation explanatory view (b) showing the same compression step.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Main body case 2 Hopper 3 Compression mechanism 4 Storage part 5 Insertion opening 6 Paper cutting waste 7 Screw 8 Spiral conveyor 13 Compression cylinder 16 Compression rod 17 Toggle mechanism 26 Toggle shaft 39 Rise section

Claims (4)

[Claims] 1. A spiral conveyor for transporting cut paper cuttings into a storage chamber for storing the paper cuttings. The spiral conveyor forms a main body of the spiral conveyor and has a spiral portion and is driven to rotate. The leading end of the spiral shaft is made to face the storage chamber through a predetermined opening, and the starting end of the spiral portion at the leading end of the spiral shaft rises from the center side of the spiral shaft to the outer peripheral side at a predetermined height. The spiral part is further connected to the base end side of the spiral shaft, and the rising part forming the starting end of the spiral part of the spiral shaft is a reference perpendicular to the rotation direction for the conveyance of the spiral shaft. With respect to a line (a reference line in the radial direction of the spiral axis), a curve in which the distance from the reference line gradually increases toward the outer periphery in the direction opposite to the rotation direction, or Paper cutting debris conveying apparatus characterized by being formed along the line. 2. A rising portion forming a starting end of a spiral portion of the spiral shaft is related to a reference line (a reference line in a radial direction of the spiral shaft) perpendicular to a rotation direction for the conveyance of the spiral shaft. The paper cutting waste conveying apparatus according to claim 1, wherein the paper cutting waste conveying apparatus is formed along a curve having a tangent to a straight line inclined in a direction opposite to the rotation direction. 3. The spiral conveyor is for transporting cut paper chips to a compression chamber for compressing the paper chips, and a tip of the spiral shaft faces the compression chamber through a predetermined opening. The paper cutting waste conveying device according to claim 1 or 2, wherein: 4. A cutting section for cutting paper, and a sheet cutting waste sent to a compression chamber.
A shredder comprising: the paper cutting waste conveying device according to claim 2; and a compression device that compresses the paper cutting waste in the compression chamber.