JPH06154636A - Paper piece crushing treatment device - Google Patents

Abstract

PURPOSE:To maintain security, to recycle waste paper and to sufficiently and uniformly loosen paper pieces by crushing the paper pieces in a reutilizable state in a short period of time. CONSTITUTION:This paper piece crushing treatment device 1 has a casing 2 and a pair of revolving shafts 3 which rotate at rotating speeds different from each other in a direction of winding the paper pieces 4 therebetween. The device is provided with shower pipes for supplying proper volume of water to the paper pieces 4 and is provided with a discharge gate 10 adjustable in opening area. The circumferential surfaces of the revolving shafts 3 are projectingly provided with cutters 11 for tearing the paper pieces and cutters 12 for crushing the paper pieces. The flanks 12c in the rotating direction of rectangular thick plates 12a constituting the cutters 12 for crushing the paper pieces incline toward the discharge gate 10 side. The long side of the front ends 12b of the rectangular thick plates 12a is set longer than the distance up to the other rectangular thick plates 12a adjacent thereto in the axial direction.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a crushing apparatus for crushing a piece of paper or the like, which requires confidentiality, for crushing, and enables reuse of used paper.

[0002]

2. Description of the Related Art Conventionally, a document shredder called a shredder for processing confidential documents discharged from an office or the like has usually shredded discarded documents in a dry state with a cutter. However, when the paper pieces are shredded, the paper fibers become finer,
There was a problem that it was not suitable for recycling used paper. Further, a document shredded in a strip shape in a dry state still has characters and the like in a readable state, which is problematic in terms of keeping confidentiality. For this reason, a conventional document processing apparatus is disclosed in, for example, Japanese Patent Laid-Open No. 4-12.
As described in Japanese Patent No. 6882, there has been proposed a method in which waste documents and the like are defibrated in a water tank and the defibrated material is collected while being separated from water.

[0003]

However, since the above-mentioned document processing apparatus stores a large amount of water in the water tank and disintegrates the paper pieces put into it by the stirring means, the paper pieces are defibrated. It took a long time to absorb water, soften, and defibrate, and the defibrated material had to be separated from the suspended water, and there was a problem in post-treatment of water after use. Also, supply a large amount of water
Since it requires drainage, it was difficult to use in a normal office.

According to the present invention, a wet piece of paper is rubbed and unraveled, so that the paper piece can be crushed in a reusable state in a short time without shredding the paper piece, so that confidentiality can be preserved and recycled paper can be reused. It is an object of the present invention to provide a paper piece crushing treatment device that can perform the paper piece sufficiently and evenly.

[0005]

In order to solve the above-mentioned problems, the paper piece crushing apparatus according to claim 1 has a paper piece insertion opening at the upper surface of one end of a cylindrical casing which is installed substantially horizontally. A discharge gate whose opening area can be adjusted is attached to the side surface of the other end, and the inside of the casing extends from the paper piece insertion opening side to the discharge gate side and is different from each other in the winding direction of the paper piece to be introduced. A pair of rotary shafts that rotate at a rotational speed are pivotally supported, and a paper piece tearing cutter is provided on the peripheral surface of the rotary shaft on the side of the paper piece insertion opening side for feeding the paper piece to a plane perpendicular to the axis of the rotary shaft. A plurality of thick plate shaving cutters are radially provided on the peripheral surface of the rotary shaft on the side of the discharge gate in a radial direction and parallel to the plane perpendicular to the rotary shaft. Projected, near the opening for inserting the paper piece In the paper piece crushing treatment device in which a water supply pipe for making the paper piece wet is attached in the casing, the rotation axis is a square cross-section angular axis, and the paper piece crushing cutter is perpendicular to the same axis of the angular axis. A plurality of sets of four rectangular thick plates are projected on each side of the direction plane as one set, and the side length of each rectangular thick plate facing the angular axis is formed longer than the distance between the adjacent groups and each rectangular thickness It is characterized in that the side surface on the rotation direction side of the plate is formed so as to be inclined so as to face the discharge gate side. Also, in the paper fragment crushing apparatus according to claim 2, the casing forms a convex inner surface between the concave inner surface adjacent to the tip of the rectangular thick plate and the concave inner surface adjacent to the concave inner surface, and the convex inner surface is higher than the convex inner surface. It is characterized by protruding.

[0006]

In the paper piece crushing apparatus according to the first aspect, the paper piece is thrown in through the paper piece throwing opening provided on the upper surface of one end of the cylindrical casing which is installed substantially horizontally. The thrown paper piece is supplied with water from the water supply pipe to be in a wet state and falls between the pair of rotating cutters for tearing a paper piece. The pair of paper piece tearing cutters rotate in the direction in which the falling paper pieces are wound, and rotate at mutually different rotational speeds, so that the paper pieces are largely torn. The torn paper piece is fed along the angle axis by the feeding action of the paper piece tearing cutter that projects by inclining in the paper piece feed direction with respect to the plane perpendicular to the angular axis that is the rotation axis of the extending square section. Is sent from the opening side for inserting the paper pieces to the discharge gate side.

A rectangular thick plate is provided on each side of the square axis on the discharge gate side.
The cutters for crushing paper pieces that radially protrude as a set of sheets are inferior in feeding action because they are parallel to the plane perpendicular to the axis of the angular axis, and the teared paper pieces that are fed in are sequentially stored between this section and the discharge gate. To be done. The teared paper pieces that are condensed and stored in a wet state are rubbed while being pressed against the tip end of the rectangular thick plate of the paper piece crushing cutter and the inner wall of the casing, and gradually become finer. This fine-grained piece of paper is gradually extruded toward the discharge gate due to the inclination of the side surface of the rectangular thick plate, but the side length facing the angular axis of each rectangular thick plate is adjacent to the other rectangular shape in the axial direction of the angular axis. Since it is formed longer than the distance to the thick plate, the length of the kneading and loosening per unit volume of the paper pieces filled in the casing becomes long, and the kneading and loosening effect is enhanced.

By adjusting the opening area of the discharge gate, the discharge amount per unit time is limited, and the time during which the paper piece stays in the cutter section for crushing the paper piece is adjusted. This paper fragment crushing device adjusts the degree of atomization of the paper fragment with the amount of water supply and the opening area of the discharge gate.

In the paper piece crushing apparatus according to the second aspect of the present invention, the paper piece rubbed by the inner surface of the concave portion of the casing and the tip portion of the rectangular thick plate is laterally fed to the inner surface portion of the adjacent convex portion due to the inclination of the side surface of the rectangular thick plate. It The piece of paper that has moved to the inner surface of the convex portion has a different rotating inner diameter from the paper piece of the inner surface of the adjacent concave portion,
Moreover, since the projections protruding from the inner surface of the convex portion prevent co-rotation of the paper pieces, the edges of the paper pieces rotating in contact with the inner surface of the concave portion and the inner surface of the convex portion are cut, and the paper pieces are mixed in the inner surface section of the convex portion. .
For this reason, the entire thrown paper pieces are crushed evenly.

[0010]

Embodiments of the present invention will now be described in detail with reference to the accompanying drawings. FIG. 1 is a plan sectional view of a paper piece crushing treatment apparatus of the present invention, and FIGS. 2 to 4 are sectional views taken along line II-II and II of FIG. 1, respectively.
It is sectional drawing which shows the I-III cross section or the IV-IV cross section. The paper piece crushing processing device 1 has a cylindrical casing 2 and a pair of rotating shafts 3 and 3 which are axially supported in parallel in the casing 2, and each rotating shaft 3 and 3 is driven by a drive motor (not shown). It rotates at mutually different rotation speeds in the winding direction of the thrown-in paper piece 4 (the direction of the arrow in FIGS. 1, 3, and 4). The rotating shaft 3 forms a square rectangular cross section as shown in FIGS. 3 and 4.

As shown in FIG. 2, the casing 2 has a leg member 5
It is installed substantially horizontally on the top, and an opening 6 for inserting a piece of paper is opened on the upper surface of one end thereof. A hopper 7 is erected on the paper piece input opening 6, and a shower pipe 8a for supplying an appropriate amount of water to the paper piece 4 to be input is installed inside the hopper 7. The shower pipe 8a controls an adjusting valve (not shown) of the water supply pipe 8 to be connected to bring the paper piece 4 to be put into a desired wet state. A discharge opening 9 is formed on the side surface of the other end of the casing 2, and a discharge gate 10 for adjusting the opening area is also provided.

The rotary shaft 3 extends from the paper piece insertion opening 6 side to the discharge opening 9 side, and the peripheral surface 3 on the paper piece insertion opening 6 side.
A plurality of paper piece tearing cutters 11 are provided on a so as to be inclined at an angle θ with respect to the plane perpendicular to the axis of the rotary shaft 3. This inclination angle θ is an angle suitable for feeding the paper piece 4 into which the rotating paper piece tearing cutter 11 has been inserted to the discharge gate 10 side. Further, the paper piece tearing cutters 11 projecting from the respective rotary shafts 3 have cutting edges 11a formed on the top and side surfaces in the rotation direction, but the biaxial cutting edges 11a have a size that intersects each other during rotation. Therefore, the respective attachment positions are shifted so that the blade edges 11a of the other rotary shafts 3 are inserted between the adjacent paper piece tearing cutters 11, 11 on the one rotary shaft 3 (FIG. 1). Further, in the paper piece tearing cutter 11, in order to exert a strong tearing force on the fed paper piece 4, the root portion fixed to the rotating shaft 3 is formed thick, and in order to obtain a smoother rotating force, the top of the cutting edge 11a is the casing 2 Forming an arc along the inner surface of the.

On the peripheral surface of the rotary shaft 3 on the side of the discharge gate 10, a plurality of paper piece crushing cutters 12 are provided so as to project in parallel to the plane perpendicular to the rotary shaft 3. This cutter 12 for crushing paper pieces
Is four rectangular thick plates 12a on each side of the same plane of the rotating shaft 3
As a set, a plurality of sets, at equal intervals on the respective rotating shafts 3, 3,
In addition, it is radially arranged at a position where it can face the other rotating shaft 3. The front end portion 12b of each rectangular thick plate 12a has a rectangular thick plate 12 facing the inner surface 2a of the casing 2 and another rotary shaft 3.
It holds a slight gap with the tip portion 12b of a. This gap is a space suitable for kneading and loosening while pressing the wet paper piece 4, and when the teared paper piece 4 is fed into this gap while being stirred by the radial rectangular thick plate 12a, it is gradually kneaded and finely granulated. Will be transformed.

In order to sufficiently and efficiently perform the atomization, it is necessary to continuously and evenly loosen and mix the paper pieces 4 filled in the casing 2 per unit volume. Therefore, the tip portion 12b of the rectangular thick plate 12a is
Is L and the distance to another rectangular thick plate 12a adjacent in the axial direction of the rotating shaft 3 is D, the L / D ratio is 1 or more. It should be noted that if the rectangular thick plates 12a are too close to each other, the mixing of the paper pieces 4 becomes insufficient. Therefore, it is desirable to set this ratio so as to satisfy the relational expression of 1.10 ≦ L / D ≦ 1.15. .

Further, both side surfaces 1 of the rectangular thick plate 12a in the rotating direction.
2c and 12d have an inclination angle of 45 ° with respect to the axial direction of the rotating shaft 3. With respect to this inclination angle, the side surface 12c in the rotation direction in which the paper piece 4 is wound faces the discharge gate 10 side, and the opposite side surface 12d faces the paper piece insertion opening 6 side.
By utilizing this inclined surface, the paper piece 4 is laterally fed.
In addition, on the rotating shaft 3 having a low rotation speed, the paper piece feeding blade 1 is provided between the paper piece tearing cutter 11 and the paper piece crushing cutter 12.
3 protrudes, and a cutter 12 for crushing paper pieces and a discharge gate 10
Paper sheet feeding blades 14 project from both rotary shafts 3 and 3. These paper piece feeding blades 13 and 14 are also rectangular thick plates radially fixed to the rotating shaft 3, and are attached with an inclination in the same direction as the paper piece tearing cutter 11 with respect to the plane perpendicular to the axis of each rotating shaft 3. ing. The paper piece tearing cutter 11, the paper piece crushing cutter 12, and the paper piece feeding blades 13 and 14 are firmly attached to the rotary shaft 3 having a rectangular cross section.

In the inner cross section of the casing 2, the cross-sectional area of the portion containing the paper piece tearing cutter 11 is larger than the portion containing the paper piece crushing cutter 12. This is because the inserted paper piece 4 is compressed and pushed into the crushing region of the paper piece crushing cutter 12. In addition, the inner surface 2a of the casing 2 which the cutter 12 for crushing the paper pieces approaches is provided with a tip portion 12 of the cutter.
The portion facing b is the concave portion 2b, and both sides thereof are the convex portions 2c, 2
c. The paper piece 4 which is agitated by the rotation of the rectangular thick plate 12a is sent to the concave portion 2b and kneaded.

As shown in FIG. 4, both the concave portion 2b and the convex portion 2c have a sectional shape in which two circles intersect on the same plane.
A projecting portion 15 higher than the inner surface of the projecting portion 2c is provided at the intersection of the two circles. The protrusion 15 is a plate material that protrudes at an acute angle from the circumferential portion of each circle, and prevents the paper piece 4 from rotating along with the rotation shaft 3 along the inner surface of the protrusion 2c. or,
The discharge gate 10 provided along with the discharge opening 9 is a plate material having a size capable of closing the opening, and is fixed at a desired height by the wing nut 10a.

Next, the operation of the paper piece crushing processing apparatus 1 will be described. Paper piece 4 thrown into casing 2 from hopper 7
Falls between the paper piece tearing cutters 11 projecting from the pair of rotating rotary shafts 3, 3. This paper tearing cutter 1
1 is a blade edge 11a of another rotating shaft 3 between adjacent cutters.
Are inserted, and they rotate in the directions in which the paper pieces 4 are rolled in each other, and also rotate at mutually different rotational speeds,
The paper pieces 4 are locked by the mutual cutting edges 11a and largely torn.
Since the blade edge 11a tears the paper piece 4 without cutting it, there is no fear of making the paper fibers fine. Further, since the rotating shaft 3 has a rectangular cross section, it is possible to prevent co-rotation in which the paper piece 4 comes into close contact with the rotating shaft 3 and rotates at the same time.

Moisture is supplied to the paper piece 4 from the shower pipe 8a to give flexibility, but the amount of water is increased when fine grain formation is desired for keeping confidentiality. Since the paper piece 4 is processed in a wet state, paper dust and static electricity are not generated, and the paper cutting noise is reduced, so that the noise level can be suppressed to a low level.

The torn paper piece 4 is wound inside the opposing rotating shafts 3 and 3, and the paper piece tearing cutter 1 is used.
With the feeding action of 1, the opening 6 for inserting the paper piece along the rotating shaft 3
Side is sent to the discharge gate 10 side one by one and the paper piece feeding blade 1
3 is swallowed and sent out to the opposing 12-piece crushing cutter.

Since the inner cross section of the casing 2 in the crushing area where the paper piece crushing cutter 12 is projected is narrowed down and the paper piece crushing cutter 12 has a poor feeding action, the paper piece 4 is compressed and pushed into this crushing area. The discharge gate 10
It is condensed and stored in between. The torn paper pieces 4 thus condensed and stored in the wet state are the tip portion 12b of the paper piece crushing cutter 12 and the inner surface 2a of the casing 2.
Are rubbed and loosened between the concave portions 2b and the convex portions 2c, which are formed in the above, and gradually become finer particles. Since this kneading and loosening effect is effective only on the paper piece 4 that has absorbed and softened, it is not possible to knead and loosen non-hygroscopic contaminants such as plastic and metal. Therefore, they are discharged in the same size and shape as when they are put in, and therefore they are very easily separated as foreign matter.

Further, since the convex portion 2c has a function of delaying the lateral feeding of the paper piece 4, the kneading and loosening action becomes stronger.
The atomized paper piece 4 is gradually pushed toward the discharge gate 10 side by the inclination of the side surface 12c of the rectangular thick plate 12a, laterally fed, and moved to the inner surface portion of the convex portion 2c. Although the paper pieces 4 rotate with the rotation of the rotary shaft 3, the projections 15 prevent co-rotation, so that the paper pieces 4 are mixed in this section. The atomized paper piece 4 is gradually pushed toward the discharge gate 10 side, and is quickly discharged to the outside from the discharge gate 10 by the rotation of the paper piece feed blade 14.

By adjusting the opening area of the discharge gate 10 for discharging the loosened and loosened paper particles 4a, the discharge amount per unit time is limited, and the time during which the paper particles 4 stay in the crushing area is adjusted. It The stagnation time and the water content are adjusted to obtain a paper grain size suitable for the security level. The fine-grained paper piece 4a is not readable for characters, symbols, etc. and has a perfect confidentiality-preserving performance. Moreover, when used as a raw material for waste paper, the strength and length of the paper fiber are maintained, so that it can be easily reused. or,
It has a shape and properties that make it easy to handle even when used as fuel.

In this paper piece crushing apparatus, when a paper piece that exceeds the processing capacity is thrown in and the drive motor becomes overloaded, a control device (not shown) acts to stop it. After that, when the rotary shaft 3 is rotated in the reverse direction, the side surface 12d of the cutter 12 for crushing a piece of paper that faces the opening 6 for inserting a piece of paper.
Sends the piece of paper 4 backward, and sends the excess piece of paper 4 back to the hopper 7. After removing the excess piece of paper 4, the normal rotation is restored.

[0025]

As described above, in the paper piece crushing apparatus according to the first aspect of the invention, the side length of the paper piece crushing cutter facing the angular axis is formed longer than the distance to the rectangular thick plates adjacent in the axial direction. Therefore, the extension distance of the kneading and loosening becomes long, and the particles can be sufficiently pulverized. In the paper piece crushing apparatus according to the second aspect of the present invention, since the high protrusion is provided on the inner surface of the convex portion, co-rotation due to rotation of the rotation axis of the paper piece can be prevented, and the paper pieces are sufficiently mixed. It is possible to crush paper pieces evenly.

[Brief description of drawings]

FIG. 1 is a plan sectional view of a paper piece crushing processing apparatus.

FIG. 2 is a cross-sectional view showing a II-II cross section of FIG.

FIG. 3 is a cross-sectional view showing a III-III cross section of FIG.

FIG. 4 is a sectional view showing a section taken along line IV-IV in FIG.

[Explanation of symbols]

 1 Paper Piece Crushing Apparatus 2 Casing 2b Recess 2c Convex 3 Rotating Shaft 4 Paper Piece 6 Paper Piece Inserting Opening 8 Water Supply Pipe 9 Discharging Opening 10 Discharging Gate 11 Paper Piece Cleaving Cutter 12 Paper Crushing Cutter 12a Rectangular Thick Plate 12b Tip Part 12c Side 15 Projection

Claims (2)

[Claims] 1. A casing for loading a piece of paper is provided on the upper surface of one end of a cylindrical casing that is installed substantially horizontally, and a discharge gate whose opening area is adjustable is attached to the side surface of the other end. Is provided with a pair of rotary shafts extending from the paper piece insertion opening side to the discharge gate side and rotating at mutually different rotational speeds in the direction in which the paper piece to be introduced is wound. A cutter for tearing a piece of paper is provided on the peripheral surface on the side of the opening so as to be inclined with respect to the plane perpendicular to the axis of the rotary shaft in the feeding direction of the paper, and on the peripheral surface of the rotary shaft on the discharge gate side. A plurality of cutters for crushing a paper piece consisting of a plurality of thick plates are radially and parallelly projected in a plurality of rows parallel to a plane perpendicular to the axis of the rotary shaft, and the paper piece is wet in the casing near the opening for inserting the paper piece. Paper crushing with water supply pipe In the processing device, the rotating shaft is
It is an angular axis of a square cross section, the cutter for crushing paper pieces,
Plural sets of four rectangular thick plates are projected on each side of the plane perpendicular to the same axis of the angular axis, and the side length of each rectangular thick plate facing the angular axis is set to be larger than the distance between the adjacent groups. A paper piece crushing apparatus, characterized in that it is formed long and the side surface on the rotation direction side of each rectangular thick plate is inclined so as to face the discharge gate side. 2. The paper piece crushing apparatus according to claim 1, wherein the casing forms an inner surface of a convex portion between an inner surface of the concave portion adjacent to a tip portion of the rectangular thick plate and an inner surface of the concave portion. An apparatus for shredding paper pieces, characterized in that a high protrusion is provided on the inner surface of the section.