JPH03143553A - Cutter device for shredder - Google Patents

Abstract

PURPOSE:To cut paper with the edges of blade and to reduce the cutting load by inserting the edges of rotary blades laminated into the annular grooves on a circular pillar body and revolving the rotary blades so that the peripheral speed of the rotary blades is faster than that of the circular pillar body. CONSTITUTION:A number of rotary blades 8 which have cutting parts on their outer peripheral parts are provided and a shaft 6 is inserted into the center of the rotary blades 8 to integrate them. On the other hand, the circular pillar body 13 having numerous annular grooves 12 is provided, and the top ends of outer peripheral part of the rotary blades 8 laminated and integrated as mentioned above are inserted into the annular grooves 12 on the circular pillar body 13 so as to rotatably support the rotary blades 8. The rotary blades 8 is revolved so that the circumferential seed of rotary blade 8 is faster than that of the circular pillar body 13. As a result, the rotary blades of small revolving torque can be used, and the driving unit is miniaturized and the circular pillar body can semipermanently be used, and the laminated blades are exchanged with small man-power.

Description

[Detailed Description of the Invention] (Field of Industrial Application) The present invention is a shredder that can be miniaturized so that it can be used as a home office machine, and has improved cutter blade replacement and shredding ability. This invention relates to a cutter device.

(Prior Art) A shredder is provided for shredding documents to prevent leakage of confidential information at companies, etc., but there are cases where a shredder is required even in an ordinary household or a self-employed business. Therefore, it is desired that the shredder be as small as possible and take up less installation space.

The conventional shredder cutter device (cutter blade)
As shown in the figure, a large number of rotary blades 1 form an edge 17.
6, and the rotary blades 1 are arranged so that their edges 17 slide together.
Six comrades are stacked on top of each other and rotated into contact.

Then, the paper is shredded by rotating the rotary blade 16 in the direction of arrow A to bite and twist the paper 18 as shown in FIG. 10.

In other words, the pulling force of the inserted paper 18 is the same as that of the rotary blade 1.
The paper is shredded by shearing force applied by the portion A where the outer peripheries 19 of 6 intersect, and at the same time at the sliding seam portion of the etch 17.

(Problem to be Solved by the Invention) The conventional shredder cutter device described above shreds paper using the shearing force generated by sliding the workpieces 17 together, so it requires a considerably large shearing force to shred the paper. requires a rotary blade 16
Since it takes a large amount of torque to rotate the shredder, there are problems in that the drive device is large and the shredder itself becomes large.

The present invention provides a shredder cutter device that replaces the conventional shearing method and allows paper to be cut with a cutting edge, reduces the cutting load, and facilitates replacement of the rotary blade. .

(Means for Solving the Problems) A means according to the present invention for solving the above problems is to provide a large number of rotary blades with blades at the tips of the outer circumferential parts, and to insert a shaft into the center of the rotary blades to form a laminated body. A cylindrical body provided with a large number of annular grooves is provided, and the tip of the outer periphery of the laminated and integrated rotary blade is inserted into the annular groove of the cylindrical body, so that the cylindrical body and the laminated and integrated rotary blade can be rotated. The circumferential speed of the rotary blade is also faster than that of the cylindrical body.

(Function) With this structure, the inserted paper is placed between the annular grooves along the outer circumferential surface of the cylindrical body, and the paper that is inserted into the annular groove is placed between the annular grooves. Since the central part of the cylinder is pressed with a rotating blade, the paper is pressed against the outer circumferential surface of the cylinder. This pressing force causes the paper to be pulled in. Also, the paper is passed through the annular groove of the cylindrical body, and the central part is pushed by the rotating blade, so the pressing of the adjacent rotating blades is done by force, and the paper is stretched between the annular grooves. Become. The paper stretched in the annular groove is then cut by a rotating blade.

By making the circumferential speed of the rotary blade faster than the circumferential speed of the cylindrical body, a frictional force is generated between the paper and the outer circumferential surface of the cylindrical body in the paper drawing direction, and the rotary blade pulls the paper. At the moment of shredding, it is the same as if the paper were stretched between the annular grooves and fixed in the drawing direction. As a result, paper shredding and drawing are organically related, and paper is efficiently shredded.

(Example) An embodiment of the present invention will be described in detail below.

In FIG. 1, rotary blades 8 made of thin steel plates are stacked with spacers 9 in between. In this embodiment, as shown in FIG.
This is done by inserting the spacer 9 alternately, positioning the spacer 9 at the end of the stack, and screwing the nut 11 into the threaded part 10 and tightening it.

It is a cylindrical body made of 13Fi elastic material, and in this embodiment, it is laminated on the shaft 4-7 via a spacer 14 so as to form an annular shape *12. Alternatively, the annular groove 12 may be integrally formed using the spacer 14.

Then, the stacked rotary blades 8 and the spring column body 13 are rotatably supported in a circle so that the stacked rotary blades 8 are inserted into the annular groove 12. Then, as shown in FIG. 6, the peripheral speed Vt of the rotary blade 8 is made faster than the peripheral speed vz of the cylindrical body 15.

3 and 4), the shafts 7 are respectively supported by bearings 4.5 of the casing 1, and the cover plate 2 provided with the paper insertion slot 3 is attached to the upper surface of the casing 1.

The operation of this embodiment configured in this way will be explained next. Paper p#-i inserted into the paper insertion slot 3, the cylindrical body 15 first
, and then the cutting edge of the rotary blade 8 to begin cutting and retraction. This state occurs at position A in FIG. 6, and when cutting starts, the cut end P' of the cut paper is cut into a circular shape by the rotary blade 8, as shown in FIGS. 5 and 6. It is bent into the groove 12 and is pressed against both sides of the rotary blade 8 due to the elasticity of the paper, and at the same time is pressed against the outer peripheral surface of the cylindrical body 13. Since the circumferential speed vlFi of the rotary blade 8 is faster than the circumferential speed v2 of the cylindrical body, the cut end i of the cut paper is pressed against both sides of the rotary blade 8 = the outer peripheral surface of the cylindrical body 13 while being squeezed downward. 150 rotations of the cylindrical body which rotates a little later than the rotary blade 8 generates a retraction force and is retracted. Further, the cut end of the cut paper is bent into the annular groove 12 by the rotary blade 8, so that the cut end P' is a kind of rib or 7 of the shredded paper, as shown in FIG. The role of the lunge is to restrain the bent sheet of shredded paper.

The paper shredded like this is stretched without bending,
It passes between the rotary blade 8 and the cylindrical body 13 and is discarded.

On the other hand, when cutting with the rotary blade 8, the center of the paper passed through the annular groove 12 of the cylindrical body 13 is pushed by the adjacent rotary blades 8, so the paper is pressed against the outer peripheral surface of the cylindrical body 13. is applied to the annular groove 12.

Since the rotary blade 8 cuts the center of the annular groove 12 in this way, the paper can be efficiently shredded. Since this shredding is not done by shearing force as in the conventional art, but by the rotary blade 8, the torque required for shredding is reduced.

Moreover, since the cylindrical body 13 is not involved in shredding paper at all,
There is no need to replace it semi-permanently. It is also possible to replace the stacked rotary blades 8.

FIG. 7 shows another embodiment of the rotary blade. This rotating blade 8'
are laminated without using a spacer, and the cutting edge 20 has a triangular shape.

Similarly, when the rotary blade 8' is used, the cut end y is bent toward the annular groove 12 by the rotary blade 8'.

Then, the bent cut end P' is held between the side surface 21 of the cutting edge 20 and the corner of the cylindrical body 130 made of an elastic body, and a strong retracting force is generated. By selecting the circumferential speed of the cutting edge 20 so that the circumferential speed of the clamping part of the cutting end y and the circumferential speed of the cylindrical body 130 are approximately equal, the rotational torque required to pull in the shredded paper is minimized. limited.

Other functions are the same as those in the previously described embodiment, so their explanation will be omitted here.

(Effects of the Invention) According to the present invention described in detail above, the cutting edges of the laminated rotary blades are inserted into the annular groove of the cylindrical body, and the circumferential speed of the rotary blade is made faster than the circumferential speed of the cylindrical body. I decided to shred the paper, so
Compared to conventional shredding using shearing force, the torque of the rotary blade required for paper shredding can be significantly reduced, and the pulling force of the shredded paper is sufficient to reduce the torque of the rotary blade with low rotational torque. use, and the drive device can be downsized.

Further, the cylindrical body has excellent effects such as being able to be used semi-permanently and requiring less effort to replace the laminated rotary blades.

[Brief explanation of the drawing]

Fig. 1 is a plan view of one embodiment of the present invention, Fig. 2 is an exploded perspective view of the laminated assembly of the rotary blade shown in Fig. 1, and Fig. 3 shows the rotary blade and cylindrical body shown in Fig. 1 assembled into a casing. FIG. 4 is a vertical sectional view of FIG. 5, FIG. 5 is a plan view showing the paper being shredded, and FIG. 6 is a front view showing the paper being shredded. 7 is a plan view of another embodiment of the rotary blade, and FIG. 8 is a partially enlarged plan view showing the rotary blade shown in FIG. 7 in a state where paper is being shredded. FIG. 9 is a plan view of a conventional example, and FIG. 10 is a front view showing a state in which paper is being shredded. 1. Rotating blade - Spacer 12... Annular groove 13... Cylindrical body

Claims (1)

[Claims] (1) A large number of rotary blades with blades at the tips of the outer periphery are provided, a shaft is inserted through the center of the rotary blades, and the layers are integrated, and a cylindrical body with a large number of annular grooves is provided, and the annular shape of the cylindrical body is The tip of the outer periphery of the laminated and integrated rotary blade is inserted into the groove to rotatably support the rotary blade that is laminated and integrated with the cylindrical body, and the circumferential speed of the rotary blade is made faster than the circumferential speed of the cylindrical body. A shredder cutter device characterized by: