JP3111808B2 - Cross cut shredder - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a cross cut shredder for finely cutting paper such as confidential documents.

[0002]

2. Description of the Related Art Cross cut shredders for cutting paper such as confidential documents into small pieces are widely used in offices and the like. The cross cut shredder is configured by arranging a pair of left and right circular cutters driven by a motor and rotating, and a separation claw body for separating and removing cutting chips finely cut by the circular cutter inside a main body case. ing.

[0003]

However, in the conventional cross-cut shredder, since both sides of the circular cutter are open, the cut debris and uncut debris separated by the separation claw body are returned to the cutting position by the circular cutter. And it was difficult to automatically re-lubricate sliding parts such as a circular cutter and a separation claw body with lubricating oil. For this reason, there has been a problem that cutting dust is clogged between the circular cutter and the separation claw body or uncut cutting dust is caught in the circular cutter, so that the rotation of the circular cutter is locked, and it becomes easy to use.
In addition, there is also a problem that many re-cuts are not performed because re-cuts are not performed reliably. Furthermore, since the sliding noise between the circular cutter and the separation claw body is generated and the separation claw body is greatly worn, periodic lubrication and maintenance need to be frequently performed, and a great deal of trouble is required for maintenance management. there were.

[0004] Therefore, the present invention increases the cutting rate by recirculating the cutting waste and uncut waste to the cutting position by the circular cutter, and enables automatic lubrication of lubricating oil to sliding parts such as the circular cutter and the separation claw body. Accordingly, an object of the present invention is to provide a cross cut shredder capable of suppressing noise and preventing abrasion of the separation claw body.

[0005]

SUMMARY OF THE INVENTION For this purpose, the present invention secures a gap between a circular cutter and a circular cutter to recirculate cut or uncut debris to a cutting position by a circular cutter. A closed cover is provided. More preferably, an elastic material and a pressing sheet are interposed between the side cover and the circular cutter. More preferably, the elastic material is impregnated with a lubricating oil.

[0006]

According to the present invention, with the above-described structure, the cutting waste or the uncut waste entering between the circular cutter and the separation claw body can be returned to the cutting position by the circular cutter and re-cut.
Further, the cutting waste is separated from the elastic material by the pressing sheet.
In addition, since the elastic material impregnated with the lubricating oil receives a pressing force through the pressing sheet due to the recirculation of the cutting waste, the lubricating oil oozes from the elastic material and automatically supplies the sliding portion such as the separation claw body to the sliding portion. Becomes possible.

[0007]

An embodiment of the present invention will be described below with reference to the drawings. FIG. 1 is a plan view of the cross cut shredder according to one embodiment of the present invention in a state where an upper case is opened, FIG. 2 is a cross-sectional view of the cross cut shredder taken along the line XX shown in FIG.
FIG. 3 is an enlarged sectional view of a main part of a cutting portion of the cross cut shredder.

In FIG. 1, reference numeral 1 denotes a lower case on which a cross cut shredder is placed and fixed. Reference numerals 2 and 3 denote a pair of left and right circular cutters for cutting the paper, W denotes the width of the cutter blade, and Z denotes the width of the cutter groove. Since the cutter groove width Z is larger than the cutter blade width W by the amount of the cutting clearance, the notch blades 2a and 3a (FIG. 3) on the outer circumference of the circular cutters 2 and 3 (FIG. 3) are formed in a spiral shape in the axial direction. The grooves enter each other,
Aligned to perform a cutting action. Although not shown, the length of the cutting waste is determined by the spiral angle and the number of strips.

4 is a power switch, 5 is a control circuit board, 6
Is a motor. The motor 6 rotates the circular cutters 2 and 3 via the driving sprocket 7, the driven sprocket 9, and the transmission chain 8. In FIG. 2, 11 is an upper case, 11a is a slot for the paper 10 to be cut, and 12 is a pipe-shaped shutter located below the slot 11a and opening and closing the circular cutters 2, 3. 14 is a separation claw body which is fitted between the circular cutters 2 and 3 to separate cutting chips, 15
Is a hexagonal holding rod for holding the separation claw body 14, 16 is a waste box for collecting cutting waste, and 17 is an operation switch. Reference numeral 18 denotes a side chassis for fixing a circular cutter to a shaft,
Etc. are held and fixed.

In FIG. 3, reference numerals 20 and 21 denote optical sensors which relatively combine a photodiode and a phototransistor for detecting whether or not the paper 10 is inserted. Reference numeral 22 denotes a side cover for closing both sides of the circular cutters 2 and 3.
4 is fixed by screws 19. This side cover 22
A gap T for circulating the cutting waste and the uncut waste is secured between the circular cutters 2 and 3.

Reference numeral 23 denotes an elastic material formed of foamed rubber or the like and impregnated with lubricating oil, and is interposed between the side cover 22 and the pressing sheet 24. The pressing sheet 24 is a plastic sheet or the like mixed with a molybdenum lubricant. The pressing sheet 24 serves to isolate the cutting waste cut by the circular cutters 2 and 3 from the elastic material 23,
Notch blade 2 of circular cutters 2 and 3
a, 3a, which has the function of pressing the cutting waste and returning the cutting waste.

Therefore, in FIG. 3, the paper 10 to be cut is inserted from the slot 11a of the upper case 11 as shown by the arrow A, and pushes the shutter 12 right and left, opening the circular cutter 2 as shown by the arrow B. It is bitten by 3 and cut. The cutting waste is discharged downward as shown by arrows C and D. However, a part of the cutting waste makes a U-turn as shown by arrows E and F and enters the separation claw body 14. The cutting waste and the uncut waste entering the separation claw body 14 are removed by the side covers 22 and the pressing sheet 24 by the circular cutters 2 and 3.
Are closed, and by the rotation of the circular cutters 2 and 3, as shown by arrows F and G through the gap T, the circular cutter 2 and the circular cutter 3 return to the meshing position, that is, the cutting position. It is cut and discharged. Further, even if the cutting debris and the uncut debris tend to accumulate on the separation claw body 14, the cut debris and the uncut debris are notched by the circular cutters 2 and 3 through the pressing sheet 24 by the elastic force of the elastic material 23. Blades 2a, 3a
And is returned to the cutting position. Further, the elastic material 23 receives a pressing force through the pressing sheet 24 due to the recirculation of the cutting debris, and the lubricating oil contained therein oozes from the upper end and the lower end thereof to the sliding portion such as the separation claw body 14. Automatic refueling.

[0013]

As described above, according to the present invention, even if cut debris or uncut debris enters the separation claw body, it can be recut by the recirculation action, so that the uncut portion is reduced, the cutting rate is increased, and the circular shape is improved. Unavailability due to cutter lock can be avoided. In addition, since an elastic body impregnated with lubricating oil is interposed on both sides of the circular cutter, there is an automatic lubrication function, and the sliding noise and wear between the circular cutter and the separation claw body can be extremely reduced, Further, the cutting waste and the elastic material can be separated by the pressing sheet. For this reason, a maintenance-free low-noise and highly reliable crosscut shredder can be realized until a predetermined life period.

[Brief description of the drawings]

FIG. 1 is a plan view of a cross cut shredder according to an embodiment of the present invention in a state where an upper case is opened.

FIG. 2 is a cross-sectional view of the cross-cut shredder according to one embodiment of the present invention, taken along the line XX shown in FIG.

FIG. 3 is an enlarged sectional view of a main part of a cutting portion of a cross cut shredder according to one embodiment of the present invention.

[Explanation of symbols]

 2, 3 circular cutter 6 motor 14 separation claw body 22 side cover 23 elastic material 24 pressing sheet T gap

Claims (2)

(57) [Claims] 1. A cross-cut shredder comprising a pair of left and right circular cutters driven by a motor and rotating, and a separation claw inserted between the circular cutters to separate cutting chips. A side cover that closes both sides of the circular cutter by securing a gap between the circular cutter and the gap for recirculating uncut waste to the cutting position by the circular cutter, between the side cover and the circular cutter To
A crosscut shredder characterized by interposing an elastic material and a pressing sheet . 2. The method according to claim 1, wherein the elastic material is impregnated with a lubricating oil.
The crosscut shredder according to claim 1, wherein