JP2013154307A - Shredder - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a shredder in which shredded waste is prevented from becoming bulky, which has good shredding efficiency, in which manufacturing costs are suppressed, and the size thereof can be reduced.SOLUTION: A shredder includes an injection port for injecting a shredding paper sheet, and a shredding part for shredding the shredding paper sheet injected from the injection port. The shredding part includes a rotary blade having a plurality of convex shredding blades on the peripheral face thereof, and a fixed blade having the same length as the longitudinal length of the rotary blade and having a plurality of concave shredding blades engaging with the convex shredding blades. The shredding paper sheet is shredded by the convex shredding blades of the rotary blade and the concave shredding blades of the fixed blade engaging with each other.

Description

  The present invention relates to an improvement of a shredder that shreds an object to be shredded such as waste paper, and more particularly to a shredder that adopts a novel shredding method.

  A shredder is a machine that shreds objects to be shredded such as unnecessary documents with a shredding blade until the contents cannot be identified. An upper part of the shredder main body is provided with an inlet for feeding an object to be shredded, and a shredder blade for shredding the object to be shredded into the inlet.

  Shredder shredding methods are broadly divided into a cross-cut method and a double (spiral) cut method.

  The cross-cut method is a chopping method composed of a pair of chopping blades provided with a large number of rotary blades, and is the method most widely adopted in recent shredders.

  Such a cross-cut method is a type of “breaking” (for example, tearing by hand, cutting into pieces), so that the shredded waste is swelled and the shredded waste swells. Therefore, there exists a problem that the bulk of shredded waste is large. In addition, this type has a problem that the shredding rate is inferior because the papers may stick together and the shredding may become unstable. However, this shredding method is often used for small household shredders and the like because the manufacturing cost is low. As an example of a cross-cut type shredder, there is Patent Document 1.

  The double (spiral) cutting method is a method in which a spiral cutter is provided below a pair of straight cutters, and shredded scraps cut with a straight cutter are cut with a spiral cutter.

  Such a double (spiral) cutting method is a “shear” (eg, cutting with scissors) type, so that the shredded waste does not swell and the shredded waste needs less bulk. In addition, this type does not become unstable due to the papers sticking together, so the shredding rate is good and it is also popular in the market.

  However, this shredding method is superior in terms of information management because of its good shredding rate, but its manufacturing cost is higher than that of the cross-cut method, so it is often found mainly in office shredders. As an example of a double (spiral) cut type shredder, there is Patent Document 2.

  In the case of the double (spiral) cutting method, since a straight cutter and a spiral cutter are required, there is a problem that not only the manufacturing cost is increased but also the size is increased and the weight is increased as compared with the cross cutting method.

JP-A-10-156204 JP 7-144143 A

  The present invention has been made in view of the above-described problems of the prior art, and provides a shredder that does not require bulky shredded waste, has a good shredding rate, can be manufactured at a low cost, and can be downsized. With the goal.

  In order to solve the above-described problem, a shredder according to the present invention is a shredder including a slot for feeding shredded paper and a shredder for shredding shredded paper loaded from the slot. The shredded portion has a rotating blade having a large number of convex shredded blades on its peripheral surface, and has the same length as the longitudinal length of the rotating blade, and meshes with the convex shredded blade of the rotating blade. A fixed blade having a plurality of concave chopping blades, and the shredded paper is shredded when the convex chopping blade of the rotary blade and the concave chopping blade of the fixed blade mesh with each other. It is characterized by becoming.

  In this way, although it is a “shear” method in which shredded waste is not bulky, there is no need to provide two types of rotary blades unlike the double (spiral) cut method, which not only reduces the manufacturing cost. There is an advantage that it can be reduced in size and weight.

  Further, the convex cutting blade of the rotary blade and the concave cutting blade of the fixed blade are respectively arranged in a row, and either the convex cutting blade of the rotary blade or the concave cutting blade of the fixed blade is provided. It is preferable to be provided inclined with respect to the axis of the rotary blade.

  That is, the convex chopping blade of the rotary blade may be inclined with respect to the axis of the rotary blade, or the concave chopping blade of the fixed blade may be inclined with respect to the axis of the rotary blade. May be. When the convex chopping blade of the rotary blade is inclined with respect to the axis of the rotary blade, the concave chopping blade of the fixed blade is preferably parallel to the axis of the rotary blade, When the concave chopping blade of the fixed blade is inclined with respect to the axis, the convex chopping blade of the rotary blade is preferably parallel to the axis of the rotary blade.

  As described above, either the convex chopping blade of the rotary blade or the concave chopping blade of the fixed blade is provided to be inclined with respect to the axis of the rotary blade, thereby reducing the resistance at the time of chopping. There is an advantage that.

  Therefore, you may make it provide a convex cutting blade so that the ridgeline of the blade group of the convex cutting blade of the said rotary blade may become V shape. By doing in this way, the center of the cutting edge group of the convex cutting blade of the rotary blade meshes with the concave cutting blade of the fixed blade first, and both ends of the cutting edge group of the convex cutting blade of the rotary blade are delayed. Since it meshes with the concave chopping blade of the fixed blade, there is an advantage that the resistance at the time of chopping is reduced and the chopping becomes smooth. Further, when the convex shredder blade is provided such that the ridge line of the tip shredder blade group of the rotary blade is V-shaped, the convexity from the center of the blade tip group of the convex shredder blade of the rotary blade. Since the pressure at the time of chopping is applied equally to both ends of the blade group of the chopping blades, there is also an advantage that the swaying of the paper at the time of chopping is reduced.

  The rotating blade includes a cylindrical rotating body and a convex chopping blade provided on a peripheral surface thereof, and the right side surface on which the convex chopping blade is perpendicular to the peripheral surface of the cylindrical rotating body. It is more preferable to have a part. In this way, a straight part is formed on the side of the convex shredder blade of the rotary blade, so that it engages with the concave shredder blade of the fixed blade, and the vertical cutting is continuously performed. The trash disappears sideways. Therefore, the shredding efficiency is improved.

  Furthermore, it is preferable that the convex chopping blade of the rotary blade has a rectangular wave shape when viewed from the side.

  In addition, as the convex shredded blade of the rotary blade, a shredded pocket portion needs to be formed at the root portion. And the magnitude | size of shredded waste can be changed by changing the area of this pocket part.

  According to the shredder of the present invention, it is possible to provide a shredder in which shredded waste is not bulky, the shredding rate is good, the manufacturing cost can be reduced, and the size can be reduced.

It is a partial exploded perspective view showing one embodiment of a shredder of the present invention. It is an enlarged view which shows one embodiment of the shredded part used for the shredder of the present invention, and the state in which the convex shredded blade of the rotary blade is provided inclined with respect to the axis of the rotary blade. It is a perspective view shown. It is an enlarged view which shows another embodiment of the shredding part used for the shredder of this invention, Comprising: The perspective view which shows the state in which the concave shredded blade of a fixed blade is inclined and provided with respect to the axis line of a rotary blade FIG. It is an enlarged view which shows other embodiment of the shredding part used for the shredder of this invention, Comprising: Convex shredding so that the ridgeline of the blade group of the convex shredding blade of a rotary blade becomes V shape It is a perspective view which shows the state which provided the blade. It is a side view which shows the shredded pocket part of the rotary blade used for the shredder of this invention. It is a principal part schematic diagram which shows the various shapes of the convex shredded blade of the rotary blade used for the shredder of this invention.

  Embodiments of the present invention will be described below, but these embodiments are exemplarily shown, and it goes without saying that various modifications can be made without departing from the technical idea of the present invention. In the drawing, the same members are denoted by the same reference numerals.

  In the figure, reference numeral 10 denotes an embodiment of the shredder of the present invention.

  As shown well in FIG. 1, the shredder 10 includes a slot 12 for feeding shredded paper and a shredder 14 </ b> A for shredding the shredded paper fed from the slot 12. 14A, the chopping portion 14A has the same length as the rotary blade 20 provided with a large number of convex chopping blades 16 on the peripheral surface 18, and the longitudinal length of the rotary blade 20. A fixed blade 24 having a number of concave chopping blades 22 that mesh with the convex chopping blades 16, and the convex chopping blades 16 of the rotary blade 20 and the concave chopping blades 22 of the fixed blades 24. The shredded paper is shredded by meshing with each other.

  Reference numeral 26 denotes a shredder housing, and reference numeral 28 denotes a waste box housed in the housing 26. The shredder 10 further has a door that can be opened and closed. However, in the example of FIG. 1, the illustrated example in which the door is removed so that the waste box 28 can be visually recognized is shown.

  FIG. 2 shows an enlarged view of the shredded portion 14A. In the shredded portion 14 </ b> A of FIG. 2, the convex shredded blade 16 of the rotary blade 20 is provided inclined with respect to the axis O of the rotary blade 20. The concave chopping blade 22 of the fixed blade 24 is provided so as to be parallel to the axis O of the rotary blade 20.

  FIG. 3 shows an enlarged view of the shredded portion 14B as another embodiment of the shredded portion. In the shredded portion 14 </ b> B of FIG. 3, the concave shredded blade 36 of the fixed blade 34 is provided inclined with respect to the axis P of the rotary blade 30. Further, the convex chopping blade 32 of the rotary blade 30 is provided so as to be parallel to the axis P of the rotary blade 30.

  As another embodiment of the shredded portion, FIG. 4 shows an enlarged view of the shredded portion 14C. In the shredded portion 14C of FIG. 4, the convex shredded blade 40 of the rotary blade 38 is provided so as to be inclined with respect to the axis Q of the rotary blade 38, so that the ridgeline of the blade group is convex. A chopping blade 40 is formed. That is, the cutting edge group 42 of the convex chopping blade 40 of the rotary blade 38 is configured to mesh with the concave chopping blade 46 of the fixed blade 44 as it goes to the center of the rotary blade 38. On the other hand, the concave chopping blade 46 of the fixed blade 44 is provided in parallel to the axis Q of the rotary blade 38.

  By doing in this way, the center of the blade group of the convex cutting blade 40 of the rotary blade 38 meshes with the concave cutting blade 46 of the fixed blade 44 first, and the convex cutting blade 40 of the rotary blade 38 of the rotary cutting blade 40. Since both ends of the blade tip group are delayed and meshed with the concave chopping blade 46 of the fixed blade 44, there is an advantage that the resistance at the time of chopping is reduced and the chopping becomes smooth.

  The convex shredder blades 16, 32, and 40 of the rotary blades 20, 30, and 38 in FIGS. 1 to 4 are formed with shredding pocket portions 48 as shown in FIG.

  Moreover, in FIG. 5, the shredded pocket part 48 provided in the root part of the convex shredded blade 16 of the rotary blade 20 of the shredded part 14A is shown. The shredded pocket portion 48 is a shredded pocket portion formed in a gap between the concave bottom portion 50 of the fixed blade 24 and the convex top portion 52 of the rotary blade 20 and the convex top portion 54 of the fixed blade 24 and the concave bottom portion 56 of the rotary blade 20.

  That is, even if the convex chopping blade 16 of the rotary blade 20 and the concave chopping blade 22 of the fixed blade 24 are engaged with each other, a gap is always formed in the chopping pocket portion 48. Is the size of chips of shredded waste. Therefore, the size of the shredded waste can be changed by changing the area of the shredded pocket portion.

  Moreover, in the example of FIGS. 1-4, the convex shredder blade 16,32,40 of the said rotary blade 20,30,38 showed the example formed by the side view rectangular wave shape.

  The rotary blades 20, 30, and 38 include cylindrical rotary bodies 58, 60, and 62 and convex chopping blades 16, 32, and 40 provided on the peripheral surfaces 18, 64, and 66 thereof. 6A, the convex chopping blade 16 of the rotary blade 20 has a rectangular wave shape when viewed from the side, and the convex chopping blade 16 is formed by the cylindrical rotating body 58. A right-angle side surface 68 that is perpendicular to the peripheral surface 18 is provided. The same applies to the convex shredder blades 32, 40 of the rotary blades 30, 38. In this way, since straight portions are formed on the side surfaces of the convex cutting blades 16, 32, 40 of the rotary blades 20, 30, 38, the concave cutting blades 22, of the fixed blades 24, 34, 44, It engages with 36 and 46, and longitudinal cutting is continuously performed, so that shredded chips are not connected horizontally. Therefore, the shredding efficiency is improved.

  An example of the right-angle side surface portion that is perpendicular to the peripheral surface of the cylindrical rotating body is not limited to the shape shown in FIG. 6A, but, for example, as shown in FIG. 6B. The convex chopping blade 70 only needs to have a right-angle side surface portion 72 that is perpendicular to the peripheral surface of the cylindrical rotating body. That is, it is only necessary that a straight portion is formed on the side surface of the convex chopping blade 70.

  However, the convex shredded blades 74 and 76 as shown in FIG. 6C and FIG. 6D do not have a right side surface portion that is perpendicular to the peripheral surface of the cylindrical rotating body, Since straight portions are not formed on the side surfaces of the convex chopping blades 74 and 76, vertical cutting is not continuously performed, and chopping waste is connected sideways. Therefore, it is preferable that the right side surfaces 68 and 72 are formed as in the shapes shown in FIGS. 6 (a) and 6 (b).

  10: shredder, 12: inlet, 14A, 14B, 14C: shredded portion, 16, 32, 40, 70, 74, 76: convex shredded blade, 18, 64, 66: peripheral surface, 20, 30, 38: Rotating blade, 22, 36, 46: Concave chopping blade, 24, 34, 44: Fixed blade, 26: Housing, 28: Waste box, 42: Cutting edge group, 48: Shredded pocket, 50: Fixed Indented bottom part of blade, 52: Convex top part of rotating blade, 54: Convex top part of fixed blade, 56: Concave bottom part of rotating blade, 58, 60, 62: Cylindrical rotating body, 68, 72: Right side surface part, O, P, Q: Axis line.

Claims (4)

  In a shredder including a slot for feeding shredded paper and a shredder for shredding the shredded paper loaded from the slot, the shredded portion has a number of convex shredder blades. A rotary blade provided on a peripheral surface, and a fixed blade having a number of concave chopping blades having the same length as the longitudinal length of the rotary blade and meshing with the convex chopping blades of the rotary blade, The shredder is characterized in that the shredded paper is shredded when the convex shredded blade of the rotary blade and the concave shredded blade of the fixed blade are engaged with each other.   Each of the convex chopping blades of the rotary blade and the concave chopping blades of the fixed blade are arranged in a row, and either the convex chopping blade of the rotary blade or the concave chopping blade of the fixed blade is the above-mentioned The shredder according to claim 1, wherein the shredder is inclined with respect to the axis of the rotary blade.   The rotating blade includes a cylindrical rotating body and a convex chopping blade provided on a peripheral surface thereof, and the right side surface on which the convex chopping blade is perpendicular to the peripheral surface of the cylindrical rotating body. The shredder according to claim 1, further comprising a portion.   The shredder according to claim 1 or 2, wherein the convex shredded blade of the rotary blade is formed in a rectangular wave shape in a side view.

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