JPH04225850A - Shredder - Google Patents

Abstract

PURPOSE:To simultaneously cut plural sheets by forming saw form edges corresponding to the circumferential parts of both disk cutters respectively, and forming space parts between the edges formed at both disk cutters. CONSTITUTION:On the circumferences of a large diameter and a small diameter of disk cutters 20, 22, the edges 26, 28 for cutting in the horizontal direction with respect to the inserting direction of document A are formed in a saw form. The edge 28 of a small diameter of the disk cutter 20 in the first cutter block 14 and the edge 26 of a large diameter of the disk cutter 20 in the second cutter block 18 are abutted by opposing each other and when the edge tips 30 are brought into contact mutually, the document A is horizontally cut. By forming the edges 26, 28 of the saw form, the space parts 32 are formed in each of disk cutters 20, 22 and when being cut, plural sheets of the document A can be inserted simultaneously for cutting thereof.

Description

[Detailed description of the invention]

0001

[Field of Industrial Application] This invention relates to an improvement in a shredder for shredding unnecessary documents, drawings, etc. (hereinafter referred to as documents) that should be discarded into fine chips, and particularly relates to an improvement in a shredding cutter for a shredder. It is.

0002

2. Description of the Related Art Today, due to the widespread use of word processors, computers, etc., in offices such as companies, most documents are created using such devices. These documents include important documents, and if there are any corrections made after the document has been typed out, the corrections will be made using the device, but in most cases the document that was originally typed out will be discarded. Currently, from the viewpoint of confidentiality, the documents to be disposed of are shredded using a shredder before being disposed of.

As shown in FIGS. 5 and 6, the cutter blade of the conventional shredder is a cutter block (3) made by combining a plurality of disc-shaped cutters (1, 2) so as to overlap at the peripheral edge. It is known that the document is cut into long strips along the insertion direction using the overlapping cut surface (4). (5)
is a spacer.

However, such shredders can only shred documents into long strips, and when they are finally disposed of, they are bulky for storing waste, and are not very good at storing waste. cannot be said.

[0005] As a way to compensate for this drawback, a technology has been developed in which after shredding into strips, the strips of scraps are cut transversely to the longitudinal direction and finely shredded again to improve storage efficiency as scraps. Are known.

[0006]

[Problems to be Solved by the Invention] However, this prior art requires a first step of cutting into strips, and a second step of laterally cutting the scraps cut into strips. This increases the number of parts, which increases costs, and also increases the size of the entire device, which poses problems such as requiring a large amount of installation space.

[0007] The present invention has been made in view of the above problems, and is capable of cutting documents into strips at one time.
It is an object of the present invention to provide a shredder which has high waste storage performance and can shred multiple documents at the same time instead of cutting documents one by one.

[0008]

[Means for Solving the Problems] In order to solve the above problems, the inventor of the present invention has conducted intensive research and has developed a shredder that shreds documents into strips by combining two cutter blocks each consisting of a plurality of disc-shaped cutters. , the cutter block is composed of a first cutter block and a second cutter block formed by alternately combining a large-diameter disc cutter and a small-diameter disc cutter in the drive shaft direction, and the diameter of each of the first and second cutter blocks is A large disc cutter and a small diameter disc cutter are arranged so as to mesh with each other, and saw-shaped blades are formed corresponding to the circumferences of both disc cutters, and documents are cut horizontally in strips in the vertical direction and at each pitch of the blades. The above problem has been solved by cutting the material into strips.

[0009] By forming a space between the blades formed on both disc cutters, not only a single document but also a plurality of documents can be shredded at the same time.

[0010] Furthermore, it is preferable that the cutting edges formed on the blades of both disc cutters be inclined with respect to the axial direction of the drive shaft, so that they act like scissors when shredding, allowing smooth cutting. .

[0011]

[Action] By turning on the shredder,
The first drive shaft (12) and the second drive shaft (16) rotate simultaneously, and the first cutter block (14) and second cutter block (18) rotate at the same speed. Then, as shown in FIG. 2, by feeding the document (A) from above, the document (A) is vertically shredded into strips by the cutting surface (24). At the same time, the document that has been shredded into strips is shredded horizontally by the blades (26, 28) of the large-diameter disc cutter (20) and the small-diameter disc cutter (22) that face each other and are in contact with each other. It becomes a waste piece of the state. The length of this chip-like waste strip is the same as that of a saw-like blade (26,
28) is determined by the pitch length between. Therefore, the shorter the pitch, the smaller the pieces of waste will be.

0012

DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be specifically described below based on an embodiment shown in the accompanying drawings. 1 and 2 show a cutter block main body (10) for a shredder according to the present invention, and the cutter block main body (10) is a first
It consists of a first cutter block (14) rotatably fixed to a drive shaft (12) and a second cutter block (18) rotatably fixed to a second drive shaft (16).

[0013] The first and second cutter blocks (14
, 18) are formed by alternately combining in the axial direction a large-diameter disk cutter (20) with a large diameter and a small-diameter disk cutter (22) with a small diameter. The large-diameter disc cutter (20) of the first cutter block (14) and the large-diameter disc cutter (20) of the second cutter block (18) overlap and contact each other at the peripheral edge, as shown in FIG. ,
A vertical cutting cutter surface (24) for cutting the document (A) into strips in the insertion direction is formed at this contact portion.

[0014] The large diameter and small diameter disc cutters (20
, 22) are provided with saw-shaped blades (26, 28) for cutting transversely to the insertion direction of the document (A). These respective blades (26, 28
) are the same number, and each blade (26, 28) is formed with a cutting edge (30). And the blade of the small diameter disc cutter (22) of the first cutter block (14) (
28) and the blade (26) of the large-diameter disc cutter (20) of the second cutter block (18) face each other and come into contact with each other as shown in FIG. When it comes into contact with it, it cuts across the document (A).

[0015] Due to the formation of the saw-shaped blades (26, 28), a space (32) is formed in each disc cutter (20, 22), and the document (A) is shredded by this space (32). At this time, a plurality of documents (A) can be inserted at the same time, and a plurality of documents (A) can be shredded at the same time.

[0016] Furthermore, the first drive shaft (12) and the second drive shaft (
16) are designed to be driven in synchronization with each other,
Therefore, the first cutter block (14) and the second cutter block (18) have the same rotational speed and rotate synchronously. The first and second drive shafts (12, 16)
In the embodiment shown in the drawings, the cross section is octagonal, but this is to prevent slippage between the drive shaft and the cutter block, and is not necessarily limited to this. Of course, it may be a quadrilateral, a hexagon, or a larger polygon.

FIGS. 3 and 4 show another embodiment of the blade (26, 28), in which the cutting edge (30) is oriented in the axial direction of the first and second drive shafts (12, 16). They are not parallel to each other, but are inclined inward (see FIG. 4) with respect to the axial direction. Therefore, when the blades (26, 28) of the opposing large-diameter and small-diameter disc cutters (20, 22) begin to come into contact with each other, the documents gradually (like so-called scissors)
A) will be shredded, and during shredding, the document will be cut effortlessly and smoothly with little resistance. In particular, it is suitable for simultaneously shredding a plurality of documents (A) without putting strain on the blade edge (30).

The cutter of the shredder of the present invention has the above-mentioned structure, and its operation will be explained next by turning on the shredder.
The first drive shaft (12) and the second drive shaft (16) rotate simultaneously, and the first cutter block (14) and second cutter block (18) rotate at the same speed. Then, as shown in FIG. 2, by feeding the document (A) from above, the document (A) is vertically shredded into strips by the cutting surface (24). At the same time, the document that has been shredded into strips is shredded horizontally by the blades (26, 28) of the large-diameter disc cutter (20) and the small-diameter disc cutter (22) that face each other and are in contact with each other. It becomes a waste piece of the state. The length of this chip-like waste strip is the same as that of a saw-like blade (26,
28) is determined by the pitch length between. Therefore, the shorter the pitch, the smaller the pieces of waste will be.

[0019]

[Effects of the Invention] As explained above, according to the present invention, a large diameter disc cutter and a small diameter disc cutter are combined, and
Since a saw-shaped blade is formed around the circumference of the disk cutter, the documents to be discarded are shredded into vertical strips, and at the same time, the blades make cross cuts, which requires extra steps and parts for the shredder. This has the advantage that it can be manufactured at low cost, is compact, and does not require additional space.

[Brief explanation of the drawing]

FIG. 1 is a top view of a cutter block used in the present invention.

FIG. 2 is a front view in FIG. 2.

FIG. 3 is a perspective view showing another embodiment of a disc cutter blade.

FIG. 4 is a side view of FIG. 3;

FIG. 5 is a front view of a conventional disc cutter.

FIG. 6 is a top view in FIG. 5;

[Explanation of symbols]

A Documents 10 Cutter block body 12 First drive shaft 14 First cutter block 16 Second drive shaft 18 Second cutter block 20 Large diameter disc cutter 22 Small diameter disc cutter 24 Cut surface 26 Blade 28 Blade 30　Blade tip 32 Space section

Claims (3)

[Claims] 1. A shredder that shreds documents into strips by combining two cutter blocks each consisting of a plurality of disc-shaped cutters, wherein the cutter blocks alternately include a large-diameter disc cutter and a small-diameter disc cutter in the direction of a drive shaft. The large-diameter disc cutter and the small-diameter disc cutter of each of the first and second cutter blocks are arranged so as to mesh with each other, and the circles of both the disc cutters are A shredder characterized in that saw-shaped blades are formed corresponding to each peripheral part, and the document is shredded into strips by cutting the document into strips in the vertical direction and across each pitch of the blades. 2. The shredder according to claim 1, wherein a space is formed between the blades formed on both of the disc cutters. 3. The shredder according to claim 1, wherein the cutting edges formed on the blades of both the disc cutters are inclined with respect to the axial direction of the drive shaft.