JPS6025552A - Document shredder - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

[Detailed description of the invention] Industrial applications The present invention relates to a document shredding machine that shreds documents into fine pieces.

Structure of conventional example and its problems Conventionally, this type of document shredding machine has a simple comb-like shape with fixed teeth and rotating teeth having a certain width, and the shredded pieces are rectangular. , it is often possible to read the text on the shredded waste. To prevent this, there is the inconvenience of having to insert documents diagonally. Furthermore, since the shredded debris is rectangular, it can be restored relatively easily, which is not preferable from the standpoint of preventing leakage of confidential information.

OBJECTS OF THE INVENTION The present invention has been made in consideration of the above-mentioned conventional problems, and an object of the present invention is to provide a document shredding machine that produces shredded waste in which characters are difficult to read and difficult to restore.

Structure of the Invention In order to achieve the above-mentioned object, the present invention has a structure in which a part or all of a plurality of tooth pieces that mesh with each other in a fixed cutter and a rotary cutter are formed with an oblique side. This makes it difficult to distinguish between faults, decipher the characters on the shredded scraps, and reconstruct the pieces by piecing together the shredded scraps, thereby effectively preventing leakage of confidential information.

Description of examples An embodiment of the present invention will be described below based on the drawings.

In FIG. 1, 1 and 1' are feed rollers, and 2 and 3 are a fixed cutter and a rotary cutter provided after the feed rollers 1 and 1'. 4 is shredded.

The fixed cutter 2 has an end surface 2a on which the paper to be shredded 4 is guided.
As shown in FIG. 2, one side 2C of each tooth 2b is formed on the right side in the same direction as the traveling direction A of the paper to be shredded 4, and the other , the side edge 2d is an inclined edge. Still, the rotary cutter 3 has a plurality of tooth rows 3b at appropriate intervals on the outer periphery of the cylinder 3ia, and the tooth rows 3b
has a plurality of tooth pieces 3C as shown in FIG.
a, , se, and extends from one side piece 3d in the same direction as the traveling direction a of the paper 4 to be shredded and the other side piece 3e which is inclined. Also, is rotary cutter 3 cylinder 3? The axis of L is arranged to be parallel to the end surface 2a of the fixed cutter 2, and when the rotary cutter 3 rotates, the teeth 3C of the tooth row 3b pass between each tooth 2b of the fixed cutter 2. It has become.

When the paper 4 to be shredded is fed in the above configuration, the paper 4 to be shredded is shredded by the fixed cutter 2 and the rotary cutter 3, but the shredded waste 6 is separated between the teeth 2b of the fixed cutter 2 and the rotary cutter. As shown in FIG. 3, the shape of tooth piece 3C of No. 3 is so-called diamond-shaped, with both sides parallel to the direction of travel and both upper and lower sides oblique.

Therefore, the writing on the side of shredded waste 6 is also difficult to read, and still...
It is also very difficult to piece together and restore the data, so it is effective in preventing leakage of confidential information.

FIG. 4 shows another embodiment of the present invention, in which the sword-shaped side 2d of each tooth 2b of the fixed cutter 2 is provided so as to correspond to the adjacent one, while the rotary cutter Each tooth piece 3C in the cutter 3 corresponds to the spacing between each saw tooth piece 2b of the fixed cutter 2, that is, the two side sides 3d,'
3e has a shape in which tooth pieces 3C, both of which have sloped sides, are arranged every other tooth. As shown in Fig. 6, there are two types of shredded waste: rectangular pieces 6a and V-shaped pieces 6b, and the reconstruction of these pieces is almost impossible.

FIG. 6 also shows another embodiment of the present invention, in which V depressions 2e and 2f are formed at the tip of the tooth piece 2b of the fixed cutter 2 and the inner bottom of the groove, while each tooth of the rotary cutter 3 The tip of piece 2C is made into a chevron shape in accordance with this, and the tip position is different in height from the adjacent one. and the seventh
As shown in the figure, the shredded waste 5cVi has a so-called fletching shape,
It also has obliquely canted parts, making it difficult to read and piece together the letters.

Effects of the Invention As is clear from the description of the embodiments above, in the present invention, oblique sides are formed on all or some of the tooth pieces of the fixed cutter and the rotary cutter that engage with each other, so that the shredded waste does not form on the oblique sides. The documents are shredded into such shapes that it is difficult to read the characters, and it is also difficult to put them back together, making it possible to use a document shredding machine that is effective in preventing security leaks.

[Brief explanation of drawings]

FIG. 1 is a diagram showing the main parts of a document shredding machine according to an embodiment of the present invention;
Fig. 2 is a block diagram of a part of the same cutter, Fig. 3 is an explanatory diagram of shredded waste by the same cutter, Fig. 4 is a block diagram of a part of a cutter according to another embodiment of the present invention, and Fig. 5 is a block diagram of a part of the same cutter. FIG. 6 is a diagram illustrating the structure of a part of a cutter according to another embodiment of the present invention, and FIG. 7 is an explanatory diagram of shredded debris produced by the cutter. 2...Fixed cutter, 2b...Tooth piece,
3...Rotary cutter, 3c...Tooth piece,
4... Paper to be shredded, 5... Shredded waste. Name of agent: Patent attorney Toshio Nakao and 1 other person No. 1
Figure 4 Figure 2 Figure 3 IA Figure 4 b Figure 5 Figure 6 Figure 7

Claims (1)

[Claims] A document shredding machine comprising a fixed cutter and a rotary cutter having a plurality of tooth pieces that engage with each other, and in which all or part of each tooth piece has an oblique side.