KR20220033362A - Spacer and paper shredder with the same - Google Patents

Abstract

The present invention relates to a spacer for a document shredder and a document shredder including the same. The spacer is installed between a plurality of pairs of cutters provided on the document shredder to maintain a gap. The spacer has a convex inner surface facing a mating spacer disposed on the opposite side. A discontinuous interval is formed in a moving path at a lower end of the outer part disposed on the opposite side of the mating spacer so as to prevent cutting crumb from moving to the top of the cutters along the outer surfaces of the cutters and spacer. Accordingly, it is possible to prevent cutting crumb cut by the cutters from returning to a cutting unit. Therefore, it is possible to prevent damage or breakage of the cutters and failure of a drive motor by reducing a drive load generated by cutting crumb remaining in the cutting unit.

Description

A spacer for a document shredder and a document shredder to which it is applied

The present invention relates to a document shredder, and more particularly, to a spacer installed between a plurality of cutters provided in a document shredder for cutting a document into pieces to maintain a gap, and a document shredder to which the same is applied.

In general, a document shredder cuts security documents or confidential documents, corporate documents with personal information into pieces, receipts of financial institutions, etc.

In addition, document shredders are provided in offices, banks, etc. of each institution to prevent and protect the leakage of personal information written on confidential documents of state institutions, government offices, and companies, as well as statements issued through ATMs by financial institutions.

Such a document shredder shreds documents by people simply inserting paper into the slot, and the shredded documents make the contents invisible.

To this end, the shredder of the document shredder includes a motor and a cutter for the document shredder, and the document shredder rotates by the rotational force of the motor to finely shred the input document.

For example, the following Patent Document 1 and Patent Document 2 disclose a document shredder technology according to the prior art.

In the document shredder according to the prior art, the document input through the inlet is supplied to a plurality of pairs of cutters, and the input documents are finely shredded while the plurality of pairs of cutters are rotated by the rotational force of the motor.

Korean Patent Publication No. 10-2009-0127653 (published on December 14, 2009) Republic of Korea Patent Registration No. 10-1502747 (registered on March 10, 2015)

However, in the document shredder according to the prior art, there is a problem in that the cutting debris shredded by the cutter moves back to the cutter along the surface of the cutter and the spacer.

Therefore, the document shredder according to the prior art may be caught between the cutters, or the driving load may increase due to the cutting debris remaining on the shredder by moving back to the cutter side along the cutter and the spacer.

For this reason, the document shredder according to the prior art has a problem of causing damage or breakage of the cutter due to the cutting debris remaining on the shredder, and malfunction of the driving motor.

An object of the present invention is to solve the above problems, and to provide a spacer for a document shredder capable of preventing the cut debris from moving back to the cutter side, and a document shredder to which the same is applied.

Another object of the present invention is to provide a spacer for a document shredder capable of minimizing a load generated while cutting chips remain on a cutter, and a document shredder to which the same is applied.

In order to achieve the above object, the spacer for a document shredder according to the present invention is installed between a plurality of pairs of cutters provided in the document shredder to maintain a gap, and an inner surface facing the counter spacer disposed on the opposite side is convex A discontinuous section on the movement path is provided at the lower end of the outer part disposed on the opposite side to the counter spacer to prevent the cut debris from moving to the upper part of the cutter along the outer surfaces of the cutter and the spacer. .

In addition, in order to achieve the object as described above, the document shredder to which the spacer according to the present invention is applied forms an external shape and a main body in which an input hole is provided, is installed inside the main body and connected to the input hole to cut documents and a shredded end cut to a predetermined horizontal and vertical length, and a collection container provided under the shredded portion for temporarily collecting shredded shreds, wherein the shredded end includes a first and second rotational shafts arranged in parallel with each other; a plurality of pairs of cutters continuously assembled to intersect each other on the first and second rotational shafts, and a spacer installed between the plurality of pairs of cutters to maintain a distance between the cutters, the spacer disposed on the opposite side of the counter spacer A discontinuous section on the movement path is provided at the lower end of the outer part to prevent the cut debris from moving to the upper part of the cutter along the outer surfaces of the cutter and the spacer.

As described above, according to the spacer for a document shredder according to the present invention and the document shredder to which the spacer is applied, the cutting chips shredded by the cutter move along the outer surfaces of the cutter and the spacer and move back onto the shredder. Discontinuous section By forming , the effect of being able to prevent the shavings from returning to the thin end is obtained.

Accordingly, according to the present invention, it is possible to prevent damage or breakage of the cutter, and failure of the drive motor in advance by reducing the driving load generated while the cutting chips returning to the shreds remain at the shreds.

1 is an exploded perspective view showing the configuration of a shredder applied to a document shredder according to the prior art;
2 is a perspective view of a document shredder to which a spacer is applied according to a preferred embodiment of the present invention;
3 is a side view showing the configuration of the sedan shown in FIG. 2;
4 is an exploded perspective view of a pair of cutters and a spacer shown in FIG. 3;
5 is an operation state diagram illustrating a method of operating a document shredder according to a preferred embodiment of the present invention.

Hereinafter, a spacer for a document shredder and a document shredder to which the spacer is applied according to a preferred embodiment of the present invention will be described in detail with reference to the accompanying drawings.

First, before describing the configuration of the document shredder and the spacer according to the present invention, the configuration of the document shredder according to the prior art will be briefly described with reference to FIG. 1 .

1 is an exploded perspective view showing the configuration of a shredder applied to a document shredder according to the prior art.

A document shredder according to the prior art includes a plurality of pairs of cutters 2 installed on a pair of rotation shafts 1, respectively, at the shredder for shredding documents, as shown in FIG. 1 .

The plurality of pairs of cutters 2 are arranged so that their leading ends are engaged with each other so as to cut the input document, respectively, and a spacer 3 is installed between the cutters 2 to maintain a gap between the cutters 2 .

The spacer 3 is formed in a substantially rectangular shape or a trapezoidal shape, and a ring coupling hole to which the ring 4 coupled to the rotation shaft 1 is coupled may be formed at one side of the spacer 3 .

In addition, a pair of shaft coupling holes to which a pair of support shafts 5 supporting the spacer 3 are coupled may be formed at the other side of the spacer 3 .

In the prior art to which the shredder configured as described above is applied, the document shredder finely cuts the document into preset horizontal and vertical lengths while the plurality of pairs of cutters 2 engage with each other when a document is inserted between a plurality of pairs of cutters 2 .

In this way, the shredded chips (hereinafter referred to as 'cutting shavings') while the cutter 2 and the cutter 2 are engaged with each other fall downward through the space between the spacers 5 and a collection container provided under the shredded ends (Fig. not shown).

However, in the document shredder according to the prior art, the cutting debris cut by the cutter 2 does not fall downward and is caught between the cutters 2, or the cutting debris falling to the lower part of the cutter 2 is separated by the spacer 3 and the cutter. As it returns to the shredded portion along the outer surface of (2), the cutting chips remain on the shredded portion.

In this way, if it is pinched between the cutters 2 or moves back along the cutter 2 and the spacer 3 to the shreds and the cutting debris remains between the cutters 2, the driving load increases, This may cause damage or breakage of the cutter 2, failure of a driving motor for driving the rotating shaft, and the like.

In order to solve this problem, the present invention prevents the cutting chips from returning to the shreds by changing the shape of the spacer applied to the shreds.

Accordingly, according to the present invention, it is possible to prevent damage or breakage of the cutter and failure of the driving motor due to the cutting debris remaining on the shredded portion in advance.

Next, the configuration of the document shredder spacer and the document shredder to which the spacer is applied according to a preferred embodiment of the present invention will be described in detail with reference to FIGS. 2 to 4 .

2 is a perspective view of a document shredder to which a spacer is applied according to a preferred embodiment of the present invention, FIG. 3 is a side view showing the configuration of the shredder shown in FIG. is an exploded perspective view of

Hereinafter, terms indicating a direction such as 'left', 'right', 'front', 'rear', 'up' and 'downward' are defined as indicating each direction based on the state shown in each figure. do.

The document shredder to which a spacer is applied according to a preferred embodiment of the present invention is installed inside the main body 20 and the main body 20, which forms an external shape and is provided with an input port 21 for inserting documents, as shown in FIG. 1 . It is connected to the input port 11 and includes a shredded section 30 for cutting documents to preset horizontal and vertical lengths, and a collection container 40 provided under the shredded section 30 to temporarily collect the shredded shreds. do.

The collection container 40 may be formed in a hexahedral shape with an open upper surface so as to collect the cutting debris that is cut and dropped at the shredded end portion 30 .

As shown in FIGS. 3 and 4 , the shredded end 30 is a first rotational shaft 51 and a second rotational shaft 52, a first rotational shaft 51 and a second rotational shaft 52 arranged in parallel with each other. A plurality of pairs of cutters 50 that are successively assembled to cross each other may be included. Each of the first and second rotation shafts 51 and 52 may have a polygonal cross-section, for example, a hexagonal shape.

And the shredded end 30 is a spacer 60 installed between each cutter to maintain a gap between each cutter 50, and a ring ( 61) may be further included.

At the same time, the shredded end 30 includes a driving motor 31 generating a driving force, a rotating gear 32 installed at one end of the first rotating shaft and receiving driving force generated from the driving motor 31 to perform rotational motion, a first rotating shaft. It may include a driving gear 33 installed at the other end of the and a driven gear 34 installed at one end of the second rotation shaft to mesh with the driving gear 33 .

The driving motor 31 and the rotating gear 32 may be connected by a connecting means such as a belt or a chain or may be connected through a gear, and the driving motor 31 may be a DC motor, a brushless motor, or the like, and the driving motor It is sufficient if the rotation speed of (31) is controllable, and it does not specifically limit.

Here, as the first rotation shaft 51 and the second rotation shaft 52 are formed in the same cross-sectional shape, the cutter 50 and the spacer 60 coupled to the first rotation shaft 51 and the second rotation shaft 52, respectively. composition is the same.

The cutter 50 is formed in a substantially disk shape, and a coupling hole 53 coupled to each of the rotation shafts 51 and 52 may be formed in the center of the cutter 50 .

The coupling hole 53 may have a polygonal cross-section, for example, a hexagonal shape so as to correspond to the cross-section of each of the rotation shafts 51 and 52 .

A keyway having an approximately semicircular cross-section may be formed at one side of the coupling hole 53 . The keyway is a part into which a key coupled to each of the rotation shafts 51 and 52 is inserted, and it ensures the coupling with each rotation shaft 51 and 52, and reduces the rotational force of the rotation shaft during the rotational movement of each rotation shaft 51 and 52. It functions to accurately transmit to the cutter (50).

A plurality of cutting portions 54 formed in a sawtooth shape may be provided on the outer peripheral surface of the cutter 50 to cut a document.

The cutter 50 may be manufactured by mixing metal powders of Fe, Cu, Ni, graphite, and Mn in a substantially plate shape, and then cutting using a press.

Alternatively, the cutter 50 may be manufactured by mixing the above-mentioned raw materials, filling the mold, compression molding by applying pressure, and sintering at a temperature below the melting point of the metal powder.

As shown in FIGS. 3 and 4, the spacer 60 according to a preferred embodiment of the present invention may have a convex cross-section when viewed from the side, such as a semicircular shape or a trapezoidal shape.

Hereinafter, a direction convexly formed toward the counter spacer 60 with respect to the center line of the spacer 60 is referred to as 'inside', and the opposite direction is referred to as 'outside'.

A ring coupling hole to which a ring 61 installed on each of the rotation shafts 51 and 52 is coupled may be formed in the convexly formed inner portion of the spacer 60 .

In addition, the inner surface of the spacer 60 may be formed as a vertical surface or a curved surface concave toward the outside in order to avoid interference with the cutter 50 disposed on the opposite side.

The ring 61 is formed in a substantially circular shape, and a cross-sectional shape of each of the rotation shafts 51 and 52, ie, a hexagonal shaft installation hole, may be formed inside the ring 61 .

The ring 61 is provided with a thickness greater than the thickness of the spacer 60 in order to maintain a gap between the cutters 50 , and has the same thickness as the thickness of the cutter 50 or slightly thinner than the thickness of the cutter 50 . can be provided with

A shaft coupling hole to which the first support shaft 62 supporting the upper end of the spacer 60 is coupled may be formed at the upper end of the outer portion of the spacer 60 . Therefore, the outer upper end of the spacer 60 may be formed in a substantially ring shape.

On the other hand, a shaft support portion 65 supported by the second support shaft 63 may be formed at the lower end of the outer portion of the spacer 60 .

That is, the shaft support part 65 may be formed in an approximately arc shape or a semicircular shape, unlike the shaft coupling hole 64 which is punched in a substantially circular shape so that the first support shaft 62 is coupled.

As such, in this embodiment, the shaft coupling hole 64 is formed at the lower end of the spacer 60 to form the shaft support portion 65 having an arc or semicircle shape, unlike the upper end having a ring shape. Accordingly, a discontinuous section is formed on the outer surface of the cutter 50 and the spacer 60 on the path where the cutting debris returns to the shredded end portion 30 .

Therefore, according to the present invention, by forming a discontinuous section on the path in which the chips shredded by the cutter move back onto the shreds, it is possible to prevent the shavings from returning to the shreds.

For this reason, the present invention can reduce the driving load caused by the cutting chips returning to the top of the shreds to prevent damage or breakage of the cutter, and failure of the driving motor in advance.

On the other hand, the coating layer 66 may be formed on the outer surface of the second support shaft 63 by applying a coating agent that can reduce the frictional force on the surface and prevent static electricity generation in order to prevent the cutting debris from adhering by static electricity, etc. .

Of course, the coating layer 66 may also be formed on the outer surface of the first support shaft 64 .

Next, a spacer for a document shredder and an operating method of the document shredder to which the spacer is applied according to a preferred embodiment of the present invention will be described in detail with reference to FIG. 5 .

5 is an operation state diagram illustrating a method of operating a document shredder according to a preferred embodiment of the present invention.

As shown in FIG. 5 , when a document is put into the document shredder 10 , a plurality of pairs of cutters 50 rotate in opposite directions to finely cut the document into preset horizontal and vertical lengths.

The shredded chips fall to the lower part of the cutter 50 and are collected in the collection container 40 .

Here, some of the cutting debris moves outward from the lower portion of the shredded end portion 30 along the outer surfaces of the cutter 50 and the spacer 60 .

At this time, the shaft support part 65 supported by the second support shaft 63 is formed at the lower end of the outer part of the spacer 60 .

That is, the shaft support part 65 is formed in an approximately arc shape or a semicircle shape so as to be supported by the second support shaft 63 to form a discontinuous section on the outer surfaces of the cutter 50 and the spacer 60 .

Therefore, as there is a discontinuous section on the movement path in which the cutting chips shredded by the cutter 50 return to the shredded end portion 30 again, the cutting chips fall downward.

Accordingly, the present invention can prevent the shavings from moving along the outer surfaces of the cutter and spacer and returning to the shreds again.

In particular, in this embodiment, the coating layer 66 is formed by applying a coating agent capable of reducing the frictional force of the surface and preventing the generation of static electricity on the outer surface of the second support shaft 63 .

Accordingly, the cutting debris may not be attached to the outer surface of the second support shaft 63 and may smoothly fall downward.

Through the process as described above, the present invention can prevent the cutting debris from returning to the shreds by forming a discontinuous section on the path where the cuttings move along the outer surfaces of the cutter and the spacer and move back onto the shreds. there is.

For this reason, the present invention can reduce the driving load caused by the cutting chips returning to the top of the shreds to prevent damage or breakage of the cutter, and failure of the driving motor in advance.

Although the invention made by the present inventors has been described in detail according to the above embodiments, the present invention is not limited to the above embodiments, and various modifications can be made without departing from the gist of the present invention.

The present invention relates to a spacer for a document shredder that prevents the shavings from returning to the shreds by forming a discontinuous section on the path where the shavings move along the outer surfaces of the cutter and the spacer and move back onto the shreds, and document shredder technology to which the same is applied applies to

10: Document Shredder
20: body 21: inlet
30: sedan 31: drive motor
32: rotation gear 33: drive gear
34: driven gear
40: collection container
50: cutter 51, 52: first and second rotation shaft
53: coupling hole 54: cutting part
60: spacer 61: ring
62,63: first, second support shaft 64: shaft coupling hole
65: shaft support 66: coating layer

Claims (5)

A spacer installed between a plurality of pairs of cutters provided in a document shredder to maintain a gap, the spacer comprising:
An inner surface facing the counter spacer disposed on the opposite side is formed to be convex,
A spacer for a document shredder, characterized in that a discontinuous section on the movement path is provided at the lower end of the outer part disposed on the opposite side to the counter spacer to prevent the cut debris from moving to the upper part of the cutter along the outer surfaces of the cutter and the spacer. . According to claim 1,
A ring coupling hole is formed in the inner portion of the spacer to which a ring installed on the rotating shaft is coupled,
A shaft coupling hole to which the first support shaft is coupled is formed at the upper end of the outer part of the spacer,
A spacer for a document shredder, characterized in that a shaft support portion is formed in an arc or semi-circle shape at a lower end of the outer portion of the spacer so as to be supported by a second support shaft. In the document shredder to which the spacer for the document shredder according to claim 1 or 2 is applied,
A body that forms an appearance and is provided with an inlet through which documents are inserted;
a slitted end installed inside the main body and connected to the inlet to cut a document into preset horizontal and vertical lengths; and
and a collection container provided under the shredded part and temporarily collecting the shredded shreds,
The thin end portions are arranged in parallel with each other a first axis of rotation and a second axis of rotation;
a plurality of pairs of cutters continuously assembled to intersect each other on the first and second rotational shafts; and
It is installed between a plurality of pairs of cutters and includes a spacer to maintain a gap between the cutters,
At the lower end of the outer part of the spacer disposed on the opposite side of the spacer, a discontinuous section on the movement path is provided to prevent the cut debris from moving to the upper part of the cutter along the outer surfaces of the cutter and the spacer. Applied document shredder. 4. The method of claim 3,
The upper end of the outer portion of the spacer is supported by a first support shaft coupled to the shaft coupling hole,
A document shredder to which a spacer is applied, characterized in that the lower end of the outer portion of the spacer is supported by a second support shaft using a shaft support formed in an arc or semicircle shape. 5. The method of claim 4,
A document shredder to which a spacer is applied, characterized in that a coating layer is formed by applying a coating agent to the outer surface of the second support shaft to reduce frictional force on the surface and prevent static electricity generation.

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