WO2011082615A1 - Multi-stage paper shredding cutter and paper shredder - Google Patents

Abstract

The invention discloses a paper shredding cutter (10) comprising a cutter table (11) and a cutter shaft (12). The cutter table (11) is provided with a flange (112) formed with a plurality of notches (1121). A raised tooth (1122) is formed between every two adjacent notches (1121). The cutter shaft (12) is rotatablely installed and is axially parallel with the flange (112). A plurality of long cutter teeth (121) and a plurality of short cutter teeth (122) extend from the surface of the cutter shaft (12) outwards. The radius of the long cutter tooth (121) is longer than that of the short cutter tooth (122). The long cutter teeth (121) and the short cutter teeth (122) are distributed alternately along the axial direction. When the cutter shaft (12) is rotated, the long cutter teeth (121) cooperate with the notches (1121) to cut the paper and the short cutter teeth (122) cooperate with the raised teeth (1122) to cut the paper. According to the paper shredding cutter (10) of the invention, secrecy degree of paper shredding may be unlimited and cost can be saved. In addition, the invention also discloses a paper shredder having the paper shredding cutter (10).

Description

 Multi-stage shredder and shredder

 .Technical field

 The present invention relates to the field of shredders, and more particularly to a multi-stage shredder tool having an unlimited degree of confidentiality of shredded paper and a multi-stage shredder having the shredder.

.Background technique

 At present, in daily life or work, there is often a need for document paper to be destroyed, thereby preventing others from obtaining the information recorded on the document. The shredder is an office equipment that uses a shredder tool set to quickly and safely cut documents that need to be kept into fine paper or granules.

As shown in FIG. 1, the existing shredder tool set mainly includes two parallel and relatively rotating shredder tools 100, and each shredder tool 100 further includes a cutter shaft 101 and a plurality of fixed cutter shafts 101 and have The shredder blade 102 of the blade tip 103. When shredding paper, a series of shifting mechanisms are driven by the motor to transmit a lower rotational speed, a larger torque to the two cutter shafts 101 and the two cutter shafts 101 are relatively rotated, when the paper passes between the two rotating cutter shafts 101, The paper is slit by the relative rotation between the circumferences of the shredder blades 102 on the two cutter shafts, and at the same time, the slit strips that have been cut are laterally broken into shorter, thin strips of paper via the tips 103. Further, in order to pour the shredded paper sandwiched between the adjacent two shredder blades 102 at the time of cutting, a paper guide sheet 104 is further installed between the adjacent two shredder blades 102. The method is separately adjusted so that the size of the shredded paper is determined by the thickness of the shredder blade 102 and the distance between the two tips 103 on the shredder blade 102, so that once the shredder blade 102 is completed, the shredder cutter The size of the paper that can be shredded by the group is also determined, so that the size of the shredded paper cannot be selected according to the user's needs, thereby limiting the confidentiality level of the shredder tool set. On the other hand, since the paper guide sheets 104 are mounted between the adjacent two shredder blades 102 to pour the shredded paper sandwiched between the adjacent two shredder blades 102 at the time of cutting, the shredder cutter is added. 100 production costs and installation difficulty. Therefore, it is necessary to provide a shredder cutter with unlimited degree of confidentiality and low production cost to overcome the above drawbacks.

Summary of the invention

 The n of the present invention is to provide a shredder cutter which has an unrestricted degree of confidentiality, a simple structure, and a low production cost.

 Another object of the present invention is to provide a shredder which has an unlimited degree of confidentiality, a simple structure, and a low production cost.

 In order to achieve the above object, the present invention provides a shredder cutter comprising a cutting blade and a cutter shaft, the cutting blade having a flange, the flange being provided with a plurality of notches, each two adjacent Forming a convex tooth between the notches; the cutter shaft is rotatably mounted and axially parallel to the flange, and the surface of the cutter shaft extends outwardly with a plurality of long teeth and a plurality of short teeth, the radius of the long teeth a radius larger than the radius of the short teeth, and a plurality of the long teeth and a plurality of the short teeth are alternately distributed in the axial direction. During the rotation of the shaft, the long teeth enter the notch and cooperate with the notch Cutting the paper, the short teeth and the convex teeth cooperate to cut the paper.

 Accordingly, the present invention also provides a shredder comprising a shredder cutter and a paper feeding mechanism, the shredder cutter comprising a cutting blade and a cutter shaft, the cutting blade having a flange, a plurality of notches are formed in the flange, and a convex tooth is formed between each two adjacent notches, and the paper feeding mechanism conveys the paper to the flange of the cutting blade; the cutter shaft is rotatably mounted and axially Parallel to the flange, the surface of the cutter shaft extends outwardly with a plurality of the long teeth and a plurality of the short teeth, the radius of the long teeth is larger than the radius of the short teeth, and a plurality of long teeth And a plurality of short teeth are alternately distributed in the axial direction. In the rotation of the cutter shaft, the long cutter teeth enter the notch and cooperate with the notch to cut the paper, and the short cutter teeth and the convex teeth cooperate to cut the paper. .

Compared with the prior art, on the one hand, since the shredder tool of the present invention is composed of a rotating shredder blade and a stationary cutting blade, the cutting speed is determined by the rotational speed of the shredder shaft, to be cut. The paper is conveyed to the shredder by a separately controlled paper feeding mechanism, so that the paper cutting and feeding can be separately controlled, so that the cutting speed can be controlled according to the user's needs by controlling the paper feeding speed. Large chopped pieces of paper Small, so the degree of confidentiality of the shredded paper cutter of the present invention is not limited, and multi-stage shredded paper can be performed. The other tooth and the short tooth can automatically remove the shredded paper, so that the shredder tool of the present invention does not require a separate paper-discharging mechanism, thereby reducing production cost and installation difficulty.

 The invention will be more apparent from the following description, taken in conjunction with the accompanying drawings.

Description of the drawings

 1 is a perspective view of a conventional shredder tool set.

 2 is a perspective view of one embodiment of a shredder cutter of the present invention.

 Figure 3 is a partial enlarged view of a portion A shown in Figure 2.

 Figure 4 is a front elevational view of the shredder cutter of the present invention shown in Figure 2.

 Figure 5 is a perspective view of the cutting blade of the shredder cutter of the present invention shown in Figure 2.

 Figure 6 is a perspective view of the arbor of the shredder cutter of the present invention shown in Figure 2.

 Figure 7 is a right side elevational view of the cutter shaft of the shredder cutter of the present invention shown in Figure 6.

 Figure 8 is a perspective view of one embodiment of the shredder of the present invention.

 Figure 9 is a schematic view of the paper shredder of the present invention shown in Figure 8 when cutting paper.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENT OF THE INVENTION Embodiments of the present invention will now be described with reference to the drawings, in which like reference numerals represent like elements. As shown in FIG. 2-7, the shredder tool 10 includes a cutting blade 11 and a cutter shaft 12, and each of the two sides of the cutting blade 11 is provided with a mounting bracket 111 and perpendicular to the two A flange 112 is provided on one side of the mounting bracket 111. A plurality of notches 1121 are defined in the flange 112, and a convex tooth 1122 is formed between the two adjacent notches 1121. Two ends of the cutter shaft 12 are rotatably mounted on the two mounting brackets 111, respectively. The cutter shaft 12 is located on the side of the cutting blade table 11 on which the flange 112 is provided. The cutter shaft 12 is axially parallel to the flange 112, and the surface of the cutter shaft 12 extends outwardly with a plurality of long teeth 121 and a plurality of short teeth 122 alternately distributed in the axial direction. The radius of the long tooth 121 is greater than the radius of the short tooth 122. When the cutter shaft 12 rotates, the long cutter teeth 121 enter the notch 1121, and cooperate with the notch 1121 to cut the paper, and the short cutter teeth 122 cooperate with the convex teeth 1122 to cut the paper.

 Specifically, referring to Figures 4, 6, 7, and 9, the long teeth 121 and the short teeth 122 have a first shearing surface 1211 and a second shearing surface 1221, respectively. The first shearing surface 1211 intersects with the surface of the cutter shaft 12 to form a first intersection line, and a plane passing through the first intersection line and tangential to the surface of the cutter shaft 12 and the first shear plane The angle α formed by 1211 is greater than 90 degrees. Preferably, the angle α is 120 degrees. The second shearing surface 1221 intersects with the surface of the cutter shaft 12 to form a second intersection line, and a plane passing through the second intersection line and tangential to the surface of the cutter shaft 12 and the second shear plane The angle formed by 1221 is greater than 90 degrees. Preferably, the angle β is 120 degrees. Moreover, the central axis 120 of the cutter shaft 12 is located at the upper right of the flange 112. Thus, when the paper is cut, the first shearing surface 1211 of the long tooth 121 and the second shearing surface 1221 of the short tooth 122 can not only cut the paper quickly, but also automatically withdraw the shredded paper.

 Preferably, the long teeth 121 and the short teeth 122 are respectively symmetrical along the two radial diameters of the cutter shaft 12. The long tooth 121 has two first shear faces 1211, and the two first shear faces 1211 are symmetrical along the axis of symmetry of the long teeth 121. The short teeth 122 also have two second shear faces 1221, and the two second shear faces 1221 are symmetrical along the axis of symmetry of the short teeth 122. Thus, the cutter shaft 12 is mounted in a flexible manner.

As shown in FIGS. 8 and 9, the shredder 20 includes the shredder tool 10 and a paper feed mechanism 30. The paper feed mechanism 30 includes two paper feed rollers 31 and 32 rotatably mounted on the two mounts 111, and two of the paper feed rollers 31 and 32 are located The side of the cutting blade 11 opposite the cutter shaft 12. The paper 33 to be broken enters from the middle of the two paper feed rollers 31 and 32, and is separated by two The paper feed rollers 31 and 32 are conveyed to the flange 112 of the cutting blade table 11 of the paper shredder 10 so as to respectively pass the engagement of the long teeth 121 with the notch 1121 and the short teeth 122 and The cooperation of the convex teeth 1122 is carried out to carry out the process of shredding paper.

 The working principle of the shredder 20 of the present invention will now be described in detail with reference to Figures 8-9: The two paper feed rollers 31 and 32 are rotated by a paper feed drive (not shown) so as to be sandwiched between two The sheet 33 in the middle of the root paper feed rollers 31 and 32 is conveyed along the upper surface of the cutter head 11 of the shredder cutter 10 to the flange 112 of the cutter head 11. At the same time, the cutter shaft 12 is rotated by a shifting mechanism (not shown) to rotate the long cutter teeth 121 and the short cutter teeth 122 on the cutter shaft 12 when the long cutter teeth 121 enter the notch 1121 of the cutter table 11 When the short teeth 122 are rotated to the convex teeth 1122, the long teeth 121 cooperate with the notches 1121, or the short teeth 1122 and the convex teeth 1122 cooperate to partially cut the paper 33. Then, when the short tooth 122 rotates to the convex tooth 1122, or the long tooth 121 enters the notch 1121 of the cutting blade 11, the short tooth 122 cooperates with the convex tooth 1122, or the long tooth 121 cooperates with the notch 1121, the paper The uncut portion of 33 is sheared to complete the shearing of the paper 33. Understandably, if the user needs to cut the paper 33 into fine paper or granules, the paper feed speed of the paper feed mechanism 30 can be controlled to be slow, thereby cutting the paper 33 into fine paper or granules.

Therefore, since the shredder cutter 10 of the present invention is composed of a rotating cutter shaft 12 and a stationary cutter table 11, the paper cutting speed is determined by the rotational speed of the cutter shaft 12, and the paper 33 to be cut is separately controlled. The paper feeding mechanism 30 is conveyed to the shredder tool 10, so that the paper cutting and the feeding paper can be separately controlled, so that the chopped paper can be controlled by controlling the paper feeding speed of the paper 33 according to the needs of the user during the cutting process. The size of the sheet, so the degree of segregation of the shredded paper cutter 10 of the present invention is not limited, and multi-stage shreddering can be performed. On the other hand, since the shredder tool 10 of the present invention cuts the paper 33 by the long teeth 121 and the short teeth 122, the long teeth 121 and the short teeth 122 can automatically remove the shredded paper. Therefore, the shredder cutter 10 of the present invention does not require a separate paper discharge mechanism, thereby reducing production cost and installation difficulty. The invention has been described above in connection with the preferred embodiments, but the invention is not limited to the embodiments disclosed above, but should be construed to cover various modifications and equivalent combinations in accordance with the nature of the invention.

Claims

A shredder cutter, characterized in that it comprises:  a cutting blade table, the cutting blade table has a flange, the flange is provided with a plurality of notches, and a convex tooth is formed between each two adjacent notches;  a cutter shaft, the cutter shaft is rotatably mounted and axially parallel to the flange, the cutter shaft surface extending outwardly has a plurality of long teeth and a plurality of short teeth, the radius of the long cutter teeth being larger than a radius of the short teeth, and a plurality of the long teeth and a plurality of the short teeth are alternately distributed in the axial direction. During the rotation of the cutter shaft, the long teeth enter the notch and cooperate with the notch to cut the paper. The short tooth and the convex tooth cooperate to cut the paper.  begging  2. The shredder cutter according to claim 1, wherein the long and short teeth each have a shearing surface, and the shearing surface intersects with a surface of the cutter shaft to form an intersection line. The intersection of the plane intersecting the surface of the cutter shaft and the shear plane is greater than 90 degrees. 3. The shredder cutter of claim 1 wherein a central axis of the cutter shaft is above the flange. 4. The shredder cutter according to claim 1, wherein the cutting blade has a mounting bracket on both sides thereof, and the cutter shaft is rotatably mounted on the mounting bracket. A shredder, comprising a shredder tool and a paper feeding mechanism, wherein the shredder tool comprises: a cutting blade, the cutting blade has a flange, and the flange is provided with a plurality of a notch, a convex tooth is formed between each two adjacent notches, and the paper feeding mechanism conveys the paper to the flange of the cutting blade; a cutter shaft rotatably mounted and axially parallel to the flange, the cutter shaft surface extending outwardly with a plurality of long teeth and a plurality of short teeth, the long teeth having a radius greater than a radius of the short teeth, and a plurality of the long teeth and a plurality of the short teeth are alternately distributed in the axial direction. During the rotation of the shaft, the long teeth enter the notch and cooperate with the notch to cut the paper. The short teeth cooperate with the convex teeth to cut the paper. The paper shredder according to claim 5, wherein the long and short teeth each have a shearing surface, and the shearing surface intersects with the surface of the cutter shaft to form a line of intersection. The intersection of the plane intersecting the surface of the cutter shaft and the shear plane is greater than 90 degrees. The shredder according to claim 5, wherein a central axis of the cutter shaft is located above the flange. 8. The paper shredder according to claim 5, wherein the cutting blade has a mounting bracket on both sides thereof, and the cutter shaft is rotatably mounted on the mounting bracket. 9. The paper shredder according to claim 8, wherein the paper feed mechanism includes a pair of paper feed rollers, and a pair of the paper feed rollers are rotatably mounted on the mount opposite to the cutter shaft One side.