KR20100106954A - Paper feeding roller for a shredder - Google Patents

Abstract

PURPOSE: A paper feeding roller for a shredder is provided to smoothly transfer paper torn by a supply protrusion to a cutter. CONSTITUTION: A paper feeding roller(100) includes a roller shaft, roller members(31,51), friction supply members(32,52), and a supply protrusion(40). The roller members are combined with a roller shaft and rotates with the roller shaft. The friction supply members are formed on the outer circumference of the roller members. The supply protrusion is combined with the roller member. The supply protrusion is protruded from the friction supply members.

Description

Paper feed rollers for document shredders {PAPER FEEDING ROLLER FOR A SHREDDER}

In an embodiment, a document shredder is disclosed.

A document shredder is an electronic device that shreds paper and discards it in order to prevent leakage of used paper after use.

The document shredder has a manual feeding method and an automatic paper feeding method depending on the way paper is supplied.

1 is a cross-sectional view of a document shredder disclosed in Korean Patent Application No. 10-2005-0013275 filed by the present applicant and filed with the Korean Patent Office.

Referring to FIG. 1, the document shredder includes a case 1 forming an exterior of the shredder, a drive motor 2 formed inside the case 1 to provide a driving force, and a driving force of the drive motor 2. A connecting portion 3 for transmitting to a proper position, a cutter side connecting gear 4 for transmitting a driving force to the cutter 5 in connection with the connecting portion 3, and a driving force in connection with the connecting portion 3 The feed side connecting gear 6 to be delivered to the feed roller 7 is included.

In detail, the paper feeding tray 11 on which a plurality of papers are placed on the automatic paper feeding side, and a pressing unit which is placed on the lower side of the paper feeding tray 11 so that the paper loaded on the paper feeding tray 11 is pushed upwards. (12), a pressing spring (13) for providing an elastic force to the pressing portion (12) to push up the pressing portion (12), and an upper portion of the paper feeding tray (11) to provide the paper (P) from above. A paper feed roller 7 for feeding downward is included.

In addition, an automatic paper feed sensor 9 is formed at the front end of the paper feed tray 11 to detect whether paper is placed on the paper feed tray 11. The automatic paper feed sensor 9 may be a touch sensor is applied to detect the contact of the paper, or the paper feed state can be detected by a method such that light transmission is blocked by the paper by the optical sensor.

In addition, in order to detect the paper to be manually fed, the manual feed sensor 10 is formed on the front end of the manual feed portion is inserted so that the paper is manually fed. When the supply of paper to be crushed by the automatic feed sensor 9 and the manual feed sensor 10 is detected, the driving motor 2 is operated to start the operation of the cutter 5 and the paper feed roller 7. Of course it becomes.

A plurality of the feed rollers 7 are fixed to the same roller shaft (see 15 in FIG. 2), and a supply protrusion 8 is formed on the outer circumference of at least a portion of the feed rollers 7 so that a certain number of sheets of paper are stamped at once. To be transported.

Although the connection portion 3 is described as a suitable number of gears are used in the drawings, the driving force transmission method is not limited thereto, and other connection means such as a belt may be applied.

With reference to the above-described configuration, the operation or operation of the document shredder will be described in detail.

First, the paper shredding process of the automatic paper feeding method in which the paper is automatically shredded will be described in detail. When the paper is placed on the paper feed tray 11, the paper feed is detected by the automatic paper feed sensor 9, and the driving motor 2 ) Operation starts.

Then, when paper is placed on the paper feed tray 11, the pressure is pushed upward by the pressure spring 13 to the upper side about the hinge point on the left side, so that the paper is always fed. It comes in contact with the roller 7.

On the other hand, when the paper is pushed upward by the pressing unit 12, the paper placed at least on the top of the laminated paper is in contact with the paper feed roller (7), the rotational force of the drive motor 2 is connected to the connecting portion (3) , The feed roller 7 is transmitted to the feed roller 7 through the feed side connecting gear 6, and the feed roller 7 is rotated. In addition, since the supply protrusions 8 are formed at a predetermined interval on the outer circumference of the paper feed roller 7, the paper feed roller 7 can transfer a predetermined number of sheets or more at a time.

At this time, by providing a stew to the end of the supply projection 8, a plurality of sheets of paper can be transported by the stew. Since the paper placed on the paper feed tray 11 is hung on the step 14, it cannot be moved downward in the absence of external force, and only a certain number of papers to be taken by the feeding projection 8 are forcibly pushed. It may be transferred over the step 14.

Of course, since the paper is continuously moved upward by the pressing unit 12, the paper remaining without being transported in the stacked paper is continuously moved upwards after being fed a predetermined number of sheets to be fed in appropriate amounts. Can be.

The paper provided over the step 14 is of course supplied to the cutter 5 and crushed.

Referring to the manual paper shredding process of manually crushing paper, when paper is supplied to the manual feed unit, the paper is detected by the manual feed sensor 10 and the driving of the driving motor 2 is started.

Then, the rotational force is transmitted to the cutter 5 through the drive motor 2, the connection portion 3, the cutter side connecting gear (4). The cutter 5 is provided with a pair so as to be crushed while the paper is sandwiched between the cutters 5. It will be easily guessed that the cutter 5 has a circular cross section and is provided with a plurality of blades.

Then, once the paper is caught in the gap between the cutters 5, the cutter 5 is rotated relatively quickly so that the paper can be quickly broken even if the paper feed roller 7 is not pushed. To this end, it will be easily guessed that the cutter 5 is rotated at a slightly finer speed than the paper feed roller 7 by varying the gear ratio.

In addition, when too many sheets of paper are caught between the cutters 5 and the load of the motor is too large, the paper is jammed by using a method such as comparing the speed reduction of the motor and / or the increase in power consumption. It can be determined, and the paper overloaded in the cutter can be removed by allowing the drive motor 2 to be paused and then rotated a certain number of times. Thereafter, the drive motor 2 is stopped. This facilitates extraction of supercharged paper, prevents paper shredder breakdown due to motor overload, and helps to extend product life.

2 shows a front view of the paper feed roller.

Referring to FIG. 2, a plurality of paper feed rollers 7 for feeding a predetermined amount of paper, a supply protrusion 8 formed at a substantially central portion of the paper feed roller 7, and the paper feed rollers 7 are provided. The roller shaft 15 is formed to rotate at a constant speed. Although not shown, it will be easily guessed that at least one side of the roller shaft 15 is fixed to the gear engaged with the paper feeding side connecting gear 6.

Since a plurality of paper feed rollers 7 are formed, the paper can be drawn side by side in the advancing direction, and the paper can be drawn smoothly.

3 is a cross-sectional view of a paper feed roller having a shape different from that of the paper feed roller of FIG. 2, and FIG. 4 is a cross-sectional view of II ′ of FIG. 3.

3 and 4, the paper feed roller 7 is circular, and a groove 16 is formed at an outer circumference of a predetermined width of the paper feed roller 7, and a supply protrusion (6) is formed inside the groove 16. 8) is sharply projected. In addition, since the number of the supply projections 8 is formed in plural, the paper can be completely transported and guided by the supply projections 8.

On the other hand, in the document shredder as described above, the paper feed roller 7 is ideally conveyed to the cutter 5 at the same time by the feed projection 8, a predetermined number or more of paper, but the paper is not conveyed by the feed projection (8). The problem of tearing is caused.

At this time, the torn portion of the paper is continuously torn as the paper feed roller 7 rotates, and the paper feed roller 7 is idling because the paper feed roller 7 is damaged so as not to be able to perform the paper feeding operation by the feed projection 8. There is a problem that the paper is not transferred to the cutter (5) side.

Technical challenge

The paper feed roller of the document shredder according to the embodiment is intended to solve the problem that the paper is to be conveyed to the cutter more than a predetermined number, the paper is torn smoothly by the feeding projection.

Technical solution

Feed roller according to the embodiment is a roller shaft; A roller member coupled to the roller shaft and rotating together with the roller shaft; A friction supply part formed on an outer circumferential surface of the roller member; And a supply projection coupled to the roller member and protruding from the friction supply portion.

Feed roller according to the embodiment is a roller shaft; A plurality of roller members coupled to the roller shaft and rotating together with the roller shaft; A friction supply unit formed on at least one outer circumferential surface of the plurality of roller members; And a supply protrusion coupled to at least one of the plurality of roller members.

Favorable effect

The paper feed roller of the document shredder according to the embodiment can transfer a predetermined number or more of paper to the cutter, and there is an advantage in that the paper torn by the feeding projection can be smoothly transferred to the cutter.

1 is a cross-sectional view of a document shredder disclosed in Korean Patent Application No. 10-2005- 0013275 filed by the present applicant and filed with the Korean Patent Office.

2 is a view for explaining a front view of a conventional paper feed roller.

3 is a cross-sectional view of the paper feed roller having a different shape from the paper feed roller of FIG.

4 is a cross-sectional view taken along the line II ′ of FIG. 3;

5 to 7 illustrate a paper feed roller of a document shredder according to the first embodiment.

8 is a side view for explaining the paper feed roller according to the second embodiment.

9 is a side view for explaining the paper feed roller according to the third embodiment.

10 is a side view for explaining a paper feed roller according to a fourth embodiment.

11 is a side view for explaining a paper feed roller according to a fifth embodiment.

12 is a view for explaining a paper feed roller according to the sixth embodiment.

DETAILED DESCRIPTION OF THE INVENTION

Hereinafter, with reference to the accompanying drawings to be described in detail with respect to the paper feed roller of the document shredder according to the embodiment.

5 to 7 are views for explaining the paper feed roller of the document shredder according to the first embodiment. 5 and 6 illustrate the structure of the paper feed roller, and FIG. 7 shows that four paper feed rollers are coupled to the roller shaft.

5 to 7, the paper feed roller 100 includes the first and second roller members 31 and 51, the first and second friction supply parts 32 and 52, and the first roller member 31 and the second roller. The feed projection 40 provided between the roller member 51 is included.

The first roller member 31 is inserted into the roller shaft 60 and coupled to the first roller member 31, and the first roller member 31 is coupled to the second roller member 51 so as to be screwed thereto. The screw coupling hole 33, the guide protrusion 35 formed to be coupled to the second roller member 51 in the correct direction, and the first supply protrusion formed so that the body of the supply protrusion 40 can be inserted. Coupling portion 36 is included.

On the other hand, the second roller member 51 is inserted into the roller shaft 60, the second roller shaft coupling hole 54 for coupling and the first roller member 31 is coupled to be fixed to the screw A second screw coupling hole 53, a guide hole 55 formed to be coupled to the first roller member 31 in the correct direction, and a second formed so that the body of the supply protrusion 40 can be inserted Supply projection coupling portion 56 is included.

The first and second roller shaft coupling holes 34 and 54 are formed in a polygonal shape so that the first and second roller members 31 and 51 may be rotated according to the rotation of the roller shaft 60. In the exemplary embodiment, the first and second roller shaft coupling holes 34 and 54 are formed in a hexagonal shape, but may be formed in various shapes such as a quadrangle and a pentagon.

In addition, the embodiment is illustrated that the roller shaft 60 and the first and second roller shaft coupling holes 34 and 54 are coupled using a hexagonal shape, but may be coupled through an adhesive or coupled through bolts and nuts. It may be.

As a result, the first and second roller shaft coupling holes 34 and 54 are coupled to rotate together with the rotation of the roller shaft 60.

The first and second screw coupling holes 33 and 53 are formed to fix the first roller member 31 and the second roller member 51. A screw (not shown) may be inserted through the first screw coupling hole 33 to firmly fix the first roller member 31 and the second roller member 51.

Although, in the embodiment it is illustrated that the first roller member 31 and the second roller member 51 is coupled through a screw, it is also possible to combine using an adhesive or the like.

The guide protrusion 35 and the guide hole 55 are coupled to each other. The guide protrusion 35 and the guide hole 55 allow the first roller member 31 and the second roller member 51 to be coupled in the correct direction, and the supply protrusion 40 is connected to the first hole. Since it is supported by the roller member 31 and the second roller member 51, the first roller member 31 and the second roller member 51 need to be coupled in the correct direction.

On the other hand, in the embodiment it is disclosed that the supply protrusion 40 is fixed by the first roller member 31 and the second roller member 51, it is coupled using an adhesive or the first roller member 31 The first roller member 31 and the first roller member (31) to cover the supply projection engaging portion in a flat surface without forming the supply projection engaging portion deep in only one of the second roller member 51) The second roller member 51 does not need to be coupled correctly. Therefore, the guide protrusion 35 and the guide hole 55 are not necessarily required.

A plurality of first and second supply protrusion coupling parts 36 and 56 are formed in the first and second roller members 31 and 51, respectively. In the embodiment, it is disclosed that each of the six supply protrusion coupling portions is formed, and only two of the six supply protrusion coupling portions are inserted into the supply protrusion 40 is disclosed.

The number of supply protrusions 40 inserted into the first and second supply protrusion coupling parts 36 and 56 may be appropriately adjusted.

The supply protrusion 40 may be formed of a metal material, and may be formed of stainless steel including nickel and chromium. The supply protrusion 40 is coupled to the first and second roller members 31 and 51 to protrude 0.5 to 2.0 mm from the first and second friction supply parts 32 and 52.

The first and second friction supply parts 32 and 52 may be formed of a rubber material, and may be formed of, for example, EPDM (Ethylene Propylene Diene Monomer) material.

The first and second friction supply parts 32 and 52 serve to convey paper torn by the supply protrusion 40 or paper not conveyed by the supply protrusion 40, and the first and second friction supply parts 32 and 52. A plurality of protrusions 37 and 57 having a concave-convex shape protruding from 0.1 to 0.5 mm from the friction supply portions 32 and 52 are provided. The plurality of protrusions 37 and 57 may be formed of a rubber material similarly to the first and second friction supply parts 32 and 52.

Meanwhile, the first and second friction supply parts 32 and 52 may have a flat surface.

8 is a side view for explaining the paper feed roller according to the second embodiment. In FIG. 8, only the differences from the paper feed roller described in the first embodiment will be described.

A first friction supply part 32 is formed on the first roller member 31, and a plurality of protrusions 37 are formed in two regions on the first friction supply part 32. In addition, two supply protrusions 40 are coupled to the first roller member 31.

Although not shown in the configuration related to the second roller member 51 and the roller shaft 60, the second roller member 51 also corresponds to the first roller member 31 in the light of the first embodiment. You can guess that formed.

9 is a side view for explaining the paper feed roller according to the third embodiment. In FIG. 9, only differences from the paper feed roller described in the first embodiment will be described.

A first friction supply part 32 is formed in the first roller member 31, and two supply protrusions 40 are coupled to the first roller member 31. In the third embodiment, no protrusion is formed in the first friction supply part 32.

Although not shown in the configuration related to the second roller member 51 and the roller shaft 60, the second roller member 51 also corresponds to the first roller member 31 in the light of the first embodiment. You can guess that formed.

10 is a side view for explaining the paper feed roller according to the fourth embodiment. In FIG. 10, only differences from the paper feed roller described in the first embodiment will be described.

A first friction supply part 32 is formed in the first roller member 31, and a plurality of protrusions 37 are formed in an area partially formed in the first friction supply part 32. In addition, one supply protrusion 40 is coupled to the first roller member 31.

Although not shown in the configuration related to the second roller member 51 and the roller shaft 60, the second roller member 51 also corresponds to the first roller member 31 in the light of the first embodiment. You can guess that formed.

11 is a side view for explaining the paper feed roller according to the fifth embodiment. In FIG. 11, only the differences from the paper feed roller described in the first embodiment will be described.

A first friction supply part 32 is formed on the first roller member 31, and a plurality of protrusions 37 are formed in three regions on the first friction supply part 32. In addition, three supply protrusions 40 are coupled to the first roller member 31.

Although not shown in the configuration related to the second roller member 51 and the roller shaft 60, the second roller member 51 also corresponds to the first roller member 31 in the light of the first embodiment. You can guess that formed.

12 is a diagram for explaining a paper feeding roller according to the sixth embodiment. 12, only the differences from the paper feed roller described in the first embodiment will be described.

Four paper feed rollers 200 and 300 are coupled to the roller shaft 60.

Two second feed rollers 200 are formed, and first and second friction supply parts 32 and 52 are formed on the first and second roller members 31 and 51. The supply protrusion 40 is coupled to the first and second roller members 31 and 51.

Two third paper feed rollers 300 are formed, and first and second friction supply parts 32 and 52 including protrusions 37 and 57 are formed. The supply projection 40 is not formed in the third paper feed roller 300.

The second paper feed roller 200 and the third paper feed roller 300 are alternately formed. In the embodiment, two paper feed rollers are formed, but the number of the second paper feed rollers 200 is not limited.

As described above, the paper feed rollers described in the embodiments rotate along the roller shaft and provide a certain number of sheets of paper to the cutter.

The paper feed roller includes a roller member coupled to the roller shaft to rotate, a supply protrusion coupled to the roller member, and a friction supply unit coupled to the roller member.

The friction supply part may have a protrusion, and the supply protrusion and the friction supply part may be coupled to the same roller member. Alternatively, the supply protrusion may be coupled to any one of the plurality of roller members, and the friction supply unit may be coupled to the other one of the plurality of roller members.

That is, in the present invention, the paper feed roller for conveying paper includes a supply protrusion and a friction supply unit, and the friction supply unit may have a protrusion.

According to this configuration, it is possible to transfer a predetermined number or more of the paper to the cutter by using the supply projection, it is possible to smoothly transport the paper through the friction supply unit when the paper is not smoothly transferred by the supply projection.

Embodiments can be applied to document shredders.

Claims (13)

Roller shaft; A roller member coupled to the roller shaft and rotating together with the roller shaft; A friction supply part formed on an outer circumferential surface of the roller member; And And a feeding roller coupled to the roller member and including a supply protrusion protruding from the friction supply unit. The method of claim 1, The roller shaft is a paper feed roller, characterized in that the polygonal cross-section. The method of claim 1, The roller member includes a first roller member and a second roller member, wherein the feeding projection is coupled between the first roller member and the second roller member. The method of claim 3, wherein Guide rollers are formed on the first roller member, and the second roller member is formed with a guide hole coupled with the guide protrusion. The method of claim 1, The feed projection roller, characterized in that protruding from the friction supply portion 0.5 to 2.0mm. The method of claim 1, Feeding roller characterized in that the friction supply portion is formed of a rubber material. The method of claim 1, Paper feed roller, characterized in that the friction supply portion has a plurality of protrusions protruding a predetermined amount. The method of claim 7, wherein And the plurality of protrusions protrude from 0.1 to 0.5 mm from the friction supply portion. The method of claim 7, wherein And the plurality of protrusions are arranged to be spaced apart from the plurality of areas in the friction supply unit. Roller shaft; A plurality of roller members coupled to the roller shaft and rotating together with the roller shaft; A friction supply unit formed on at least one outer circumferential surface of the plurality of roller members; And Feed roller comprising a supply projection coupled to at least one of the plurality of roller members. The method of claim 10, The feed projection roller, characterized in that protruding from the friction supply portion 0.5 to 2.0mm. The method of claim 10, Feeding roller, characterized in that the friction supply portion has a plurality of protrusions formed. The method of claim 12, And the plurality of protrusions protrude from 0.1 to 0.5 mm from the friction supply portion.

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