JPS63267453A - Shredding device for 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 Application Field> The present invention is a document for shredding confidential documents (including drawings) to make them unreadable in order to prevent leakage of confidential documents (including drawings) to the outside. The present invention relates to a shredding device for a shredder.

<Prior art> Conventionally, the shredding device of a document shredding machine was constructed by inserting a spacer and a shredding blade alternately into a rotating shaft, as shown in Japanese Patent Publication No. 48-9067. The rotating shaft, spacer, and shredding blade are each formed separately.
The shredding blade is made of iron material.

Furthermore, the technique of Japanese Utility Model Application Publication No. 61-124396 shown in FIG. 3 discloses a chopping blade l for a micro slitter using a ceramic material.

In this case, as shown in FIG. 4, the rotating shaft 2, spacer 3, and shredding blade 1 are each formed separately.

<Problem to be solved by the invention> In the shredding device of the document shredding machine (micro slitter) mentioned above, the rotating shaft 2
, spacer 3, and shredding blade 1 are each separate pieces, so
In assembling the cutter roller A, the shredding blades 11 and the spacers 3 must be fitted alternately to the rotary shaft 2, which is extremely time consuming and increases the production cost by 40%.

In addition, the document shredding machine described in Japanese Patent Publication No. 48-9067 is formed with shredding blades 1 or iron ropes 4, which increases the weight of the entire document shredding machine and makes it difficult to transport. do not have.

SUMMARY OF THE INVENTION In view of the above-mentioned problems, the present invention aims to provide a shredding device for a document shredding machine that reduces production costs, is both flexible and lightweight.

Means for Solving the Problems> As shown in the cross-sectional view of FIG.
It is composed of a plurality of shredding blades 12 fixed to the shredding blades 12 and a spacer 14 interposed between the shredding blades 12, and among the rotating shaft 10, the shredding blades 12, and the spacer 14, at least the shredding blades 12 and a spacer 14 are integrally formed of a ceramic material, and the cutter roller A is provided with a pair of respective shredding blades 12 that mesh with each other.

<Function> In the above problem solving means, when manufacturing the cutter roller A, the rotating shaft 10, the shredding blade! 2. Since the spacer 14 is integrally formed, there is no need to alternately fit the shredding blade 12 and the spacer 14 to the rotating shaft lO, reducing production costs, and since the cutter roller A is made of ceramic. This makes the document shredding machine lightweight, making it easy to transport the document shredding machine, and since the shredding blade 12 is strong and strong, its shredding capacity is increased.

<Embodiment> Hereinafter, an embodiment of the shredding device of the document shredding machine of the present invention will be described based on FIG. 1 and FIG. 2. FIG. 1 is a cross-sectional plan view of a shredding device of a document shredding machine showing an embodiment of the present invention, and FIG. 2 is an overall longitudinal cross-sectional side view.

As shown in the figure, in the shredding device of the present invention, a cutter roller A is interposed between a rotating shaft IO, a plurality of circular shredding blades 12 fixed to the rotating shaft 10, and each of the shredding blades 12. The cutting blades 12 and the spacer I4 are integrally formed of a ceramic material, and the cutter roller A is provided with a pair of cutting blades 12 meshing with each other. It was kicked out.

The width of the spacer '14 is approximately equal to the width of the shredding blade 12, and the diameter of the spacer 14 is
It is formed to have a smaller diameter than the shredding blade 12.

A shredding blade 12 disposed at the outermost side with respect to the rotation axis IO
A reinforcing part 1 for reinforcing the rotating shaft IO is further outside the rotating shaft IO.
5 is disposed, and the reinforcing portion 15 is integrally formed with the rotating shaft lO and the shredding blade 12.

Such a shredding device A or a pair of upper and lower parts are arranged on the upper part of the device body B, and the shredding blades 12 for each shredding device are connected to the other shredding device A.
It is arranged so as to mesh between the shredding blades I2.

A drive device 1 for rotationally driving this cutter roller A
6 is provided, and the drive device 16 includes a drive motor 17
, a small diameter sprocket 19 externally fitted and fixed to the motor shaft +8 of the motor 17, and the upper cutter roller A.
a large-diameter sprocket 20 externally fixed to the rotating MIO, a driving force transmission chain 2I wound around both the sprockets I9 and 20, and the cutter roller A on the reinforcing portion 15 side of the large-diameter sprocket 20. It consists of gears 22 and 23 that are externally fitted and fixed to the respective rotating shafts IO and mesh with each other.

In general, pure Zr0z (zirconium oxide) is 1°1
The crystal shape changes at a temperature around 00℃ (single crystal on the low temperature side,
At this time, a sudden change in volume of several percent occurs, causing cracks in the ceramic and causing self-destruction, making it impossible to create a dense ceramic. In order to prevent this volume change, a few percent to several tens of percent of Cab is added as a stabilizer.
(calcium oxide), Mg0 (magnesium oxide), y
t o , (yttrium oxide), etc. are added. In this case, the crystal form at room temperature becomes a cubic crystal, and the crystal form does not change until the temperature reaches high temperatures, resulting in almost linear expansion. This is called stabilized zirconia. In addition, the type with less stabilizer is called partially stabilized norconia, which is composed of a mixed crystal of monoclinic and cubic crystals, and is a very tough and high-strength ceramic.

The rotating shaft 10. Shredding blade 12, spacer 14
, the reinforcing portion 15 is made of this partially stabilized zirconia ceramic.

The rotating shaft 10, the shredding blade I2, the spacer 14, and the reinforcing portion 15 of the cutter roller A are integrally molded by a mold press method.

In addition, 24 in FIG. 2 is a waste document input port formed on the upper surface of the main body B, and 25 is a shredded waste having a drop port 26 for storing the shredded waste shredded by the shredding blade 12. It's a box.

In the above-mentioned Bunzan shredding machine, when a document is inputted from the discarded document input 024, the driving force from the motor 17 is rotating, so the document is shredded by the meshing part of the shredding blade 12. Thereafter, the shredded debris falls into the facies 25.

Further, when manufacturing the cutter roller A, since the rotating shaft IO1, the shredding blades 12, the spacers 14, and the reinforcing portions 15 are integrally formed, it is possible to alternately fit the shredding blades 12 and the spacers 14 to the rotating shaft IO. This eliminates labor and reduces production costs.Since the shredding device is made of ceramic, the cutter roller A is lightweight, making it easy to transport the document shredding machine, and the shredding blade 12 is strong and strong, so it can be Improves cutting ability.

It should be noted that the present invention is not limited to the above embodiments, and it goes without saying that many modifications and changes can be made to the above embodiments within the scope of the present invention.

For example, in the above embodiment, the rotating shaft 10, the shredding blade 12, the spacer 14, and the reinforcing part 15 are integrally formed, but in the present invention, the shredding blade 12, the spacer 14, and the reinforcing part 15 are integrally formed. Alternatively, it may be fitted to a rotating shaft 10 that is separate from this.

<Effects of the Invention> As is clear from the above description, according to the present invention, the rotating shaft, the shredding blade, and the spacer are integrally formed when manufacturing the cutter roller. This eliminates the need for alternate fitting, which reduces production costs, and since the cutter roller is made of ceramic, it is lightweight, making it easier to transport the document shredder.
Since the shredding blade is tough and has high strength, it has an excellent effect of increasing the shredding ability.

[Brief explanation of the drawing]

FIG. 1 is a cross-sectional plan view of a shredding device of a document shredding machine showing an embodiment of the present invention, FIG. 2 is a longitudinal side view of the entire structure, and FIG. 3 is a shredding device of a conventional document shredding machine. The plan view and FIG. 4 are also partially cross-sectional plan views. 10; Rotating shaft, I2: Shredding blade, 14. Spacer, 17
: Motor, 24: Waste document input port, 25: Layer phase, Δ,
cutter roller.

Claims (1)

[Claims] The cutter roller includes a rotating shaft, a plurality of shredding blades fixed to the rotating shaft, and a spacer interposed between each of the shredding blades, and at least among the rotating shaft, the shredding blades, and the spacer. A shredding device for a document shredding machine characterized by a shredding blade and a spacer integrally formed of a ceramic material.