JP2000233137A - Cutter device of shredder - Google Patents

Abstract

PROBLEM TO BE SOLVED: To reduce the number of constitutional parts and assembling man-days and to prevent the stagger of a blade plate to a cutter forming shaft without the necessity of the spacer of a different material and others. SOLUTION: An expansion part is formed by a press drawn part 29 including a bonding hole on the end face of a blade plate, a cutter blade set is formed by laying two blade plates A25 and B26 to overlap each other so that the expansion part is arranged on the outside to form a cutter blade set, the distance between cutter blade sets is secured, a cutter device in which the bonding part joining breadth to a cutter forming shaft 24 is made larger than the thickness of the two blade plates is formed so that the number of constitutional parts is reduced, and the stagger of the blade plate to a cutter forming shaft A24 is prevented without needing a spacer.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a cutter device for shredding paper.

[0002]

2. Description of the Related Art FIG. 7 is a side view showing a cross section of a part of a conventional blade-plate laminated rotary cutter.

Many shredders are provided with two blade-plate-type rotary cutters as shown in the figure, and the cutter devices are arranged so that the blade portions on the outer periphery of the rotary cutters bite each other.

A blade plate 37, which is a component of the blade plate type rotary cutter, is manufactured by pressing a metal plate, and has a sharp edge for cutting a shredded object such as paper at the outer edge. And a circular or polygonal hole (not shown) at the center for coupling to the cutter forming shaft 40 necessary for laminating a plurality of the blade plates 37. Then, the plurality of blade plates 37
Are laminated in the axial direction on a cutter forming shaft 40 forming a skeleton to constitute a blade plate laminated type rotary cutter.

[0005] More specifically, the blade-plate laminated rotary cutter is a cutter blade set in which two blade plates 37 face each other with a cutting edge 38 of a press, and paper is provided on both sides of the cutter blade set. It has a sharp edge shape necessary for cutting such as.

[0006] Between the respective cutter blade sets, opposed cutter blade sets of another set of blade plate laminated type rotary cutters are configured to be sandwiched by being overlapped with a certain gap. It is necessary that the blade sets are always laminated so as to have a constant interval. Therefore, a spacer 39 as a separate member is interposed between the cutter blade sets and laminated on the cutter forming shaft 40 for assembly. Can be

[0007]

In the blade-plate-type rotary cutter constructed as described above, a plurality of spacers are required in addition to a skeleton-forming shaft and a plurality of cutter blade sets. . This increases the number of parts,
There is a problem that the number of assembling steps also increases due to the incorporation of the spacer.

Furthermore, only the blade thickness of several millimeters of the blade plate,
Because it is only joined to the cutter forming shaft that forms the skeleton, a force acts in the direction that tilts the blade plate with respect to the cutter forming shaft during paper shredding, and the blade plate easily contacts the cutter forming shaft. As a result, the load at the time of paper shredding easily acts on the blade plate, causing deterioration of paper shredding performance and shredding efficiency, and clogging between the blade plates with shredded chips. Was.

The present invention has been made in consideration of the above-mentioned conventional problems, and does not require a spacer or the like as a separate member, thereby reducing the number of components and the number of assembling steps. An object of the present invention is to provide a shredder cutter device which does not fluctuate with respect to the cutter.

[0010]

SUMMARY OF THE INVENTION In order to achieve the above object, the present invention relates to a shredder blade plate lamination type rotary cutter, wherein a bulge portion including a coupling hole is formed at an end surface of the blade plate, and two blades are provided. The blade plates are overlapped so that the bulging portion is on the outside to form one cutter blade set, the bulging portion secures a distance between the cutter blade sets, and the cutter blade set with respect to the cutter forming shaft. Joint width of 2
It is assumed that the thickness is larger than the thickness of the blade.

According to the present invention, a gap is reliably secured between the cutter blade sets so that the cutter blade set of another opposed blade plate rotary cutter is sandwiched with a certain gap. This eliminates the need for a separate spacer or the like, thereby reducing the number of components and the number of assembly steps. Also, even if a force acts in the direction inclining the cutter blade set during paper shredding, the joining width of the joint portion of the cutter blade set to the cutter configuration shaft is large, so that the cutter blade set does not fluctuate, and as a result, Stable paper shredding can be realized without causing deterioration of paper shredding property and shredding efficiency and clogging of shredded chips between cutter blade sets due to the influence of the load at the time of paper shredding.

[0012]

DETAILED DESCRIPTION OF THE INVENTION According to the first aspect of the present invention, a blade plate laminated type rotary cutter is constructed by fitting a plurality of blade plates having a coupling hole at the center thereof into a shaft for forming a cutter. What is claimed is: 1. A cutter device comprising two plate-stacking rotary cutters arranged so that blade portions on the outer periphery of the rotary cutter bite each other, wherein said blade plate is formed in a shape having a bulging portion including a coupling hole on an end surface. The two blade plates are overlapped so that the bulging portion thereof is on the outside to form one cutter blade set, and the bulging portion secures a distance between the respective cutter blade sets. This is a shredder cutter device in which the joint width of the cutter blade set to the cutter shaft is larger than the thickness of the two blades. The gap between the cutter blade sets can be secured without spacers, and the cutter for the cutter configuration shaft can be secured. Bond over the blade set has an advantage in that stable.

According to a second aspect of the present invention, in the shredder cutter device according to the first aspect, the blade plate is made of a metal plate, and the bulging portion is formed by press drawing. This has the effect of forming a gap between the blade sets and easily forming a bulging portion for stabilizing the connection of the cutter blade set to the cutter configuration shaft.

Hereinafter, embodiments of the present invention will be described with reference to the drawings.

(Embodiment 1) FIG. 1 is a side view of a shredder mechanism according to Embodiment 1 of the present invention, FIG. 2 is a top view of the mechanism of the shredder, and FIG. 3 is a cutter section of the shredder. FIG. 4A is a cross-sectional view of a cutter blade set in a blade plate laminated type rotary cutter, and FIG.
FIG. 4B is a side view of the cutter blade set, and FIG.
Fig. 5 is a plan view of the cutter blade set, Fig. 5 is a side view showing a cross section of a part of the blade plate lamination type rotary cutter, and Fig. 6 is a view showing a state where two blade plate lamination type rotary cutters are combined. It is the side view which sectioned the part.

1 to 3, reference numeral 1 denotes a main body case of a shredder, reference numeral 2 denotes a lower case, and reference numeral 3 denotes a chassis which supports components of a mechanical portion and is housed in the main body case 1 and the lower case 2. This chassis 3 is made of metal in the present embodiment. Reference numeral 4 denotes an anti-vibration rubber made of an elastic material, which is individually engaged with recesses formed in the main body case 1 and the lower case 2 while being attached to the chassis 3. The mechanism is fixed to a plurality of bosses 5 of the main body case 1 and the lower case 2 with screws 6.

As shown in FIGS. 2 and 3, two chassis B8 are attached to the chassis 3 at a fixed interval, and two cutter covers 7 which are metal working parts are interposed therebetween. Let me. Between the chassis B8 and between the two cutter covers 7, two blade plate lamination type rotary cutters 9 for shredding papers are stored facing each other.
A plurality of separators 10 for peeling the shredded paper pieces incorporated in the blade plate type rotary cutter 9 are attached so as to engage with a curling portion 11 formed on the cutter cover 7.

The chassis 3 has three mounting screws 1
The drive motor 12 is fixed by 2a. A motor shaft 13 protruding from the driving motor 12 has
A motor pinion 14 for transmitting the rotational driving force is fixed by a fixing screw. This motor pinion 14
Is engaged with an intermediate gear 15 having a large gear portion 16 made of resin and a small gear portion 17 made of metal. A metal intermediate gear shaft 18 is attached to the chassis 3 with a nut 19.
The center of the intermediate gear 15 is rotatable with respect to the center of the intermediate gear shaft 18. The large gear portion 16 of the intermediate gear 15 meshes with the motor pinion 14 at a tooth portion.

An output shaft 20 made of metal is attached to an axis A (described later) for forming the cutter, which forms the skeleton of the blade plate type rotary cutter 9.
The output gear 20 meshes with the small gear 17 of the intermediate gear 15 at a tooth portion.
A shaft A for forming a cutter and a shaft B for forming a cutter (which will be described later) forming the skeleton of the blade plate laminated type rotary cutter 9 are each connected with a metal interlocking gear 21 having the same shape, and the teeth thereof are engaged with each other. It is fixed so that it fits. The rotation of the motor pinion 14 by the rotation of the motor shaft 13 causes the intermediate gear 15 and the output gear 2 to rotate.
0 and the interlocking gear 21 rotate in conjunction with each other, and as a result, the blade-plate-laminated rotary cutters 9 rotate in opposite directions at the same rotational speed.

The chassis 3 and the chassis B8 are provided with a metal bearing 22 protruding therefrom. The burring hole 23 forms a skeleton A for the cutter construction, which forms the skeleton of the blade plate type rotary cutter 9, and a cutter construction. The cutter shaft B (described later) is held so as to rotate, and the cutter shaft A and cutter cutter shaft B (described later) are non-rotatably mounted.
The outer peripheral portion of the coaxial receiver 22 is engaged so as to be rotatable.

Next, the blade plate laminated type rotary cutter 9 which is a feature of the present invention will be described in detail with reference to FIGS. As described above, the shredder is provided with two types of blade plate laminated rotary cutters 9 facing each other. One type of blade plate laminated rotary cutter 9 on the side to which the output gear 20 is attached will be described below. .

As shown in FIG. 5, the blade-plate laminated type rotary cutter 9 is made of metal, has a regular hexagonal cross-sectional shape and serves as a skeleton, and a plurality of cutter-forming shafts A24 for shredding papers. A blade plate A25 and a blade plate B26 are provided as a set.

The blade plate A25 and the blade plate B forming the set
Reference numeral 26 denotes a structure shown in FIG. 4, that is, a metal plate is produced by press working, and the outer peripheral portion is formed into strip-shaped shredded chips by cutting paper vertically and horizontally. Blades A25, B
26 have the same thickness. Also, the blade portion 2 on the outer peripheral portion
8 owns seven convex parts at regular intervals of angle,
Further, the blade portion 28 has an acute edge shape so that a cut can be made in order to make the papers to be cut into strips. The end face 27 is formed as an edge so as to make a vertical cut with respect to papers. Here, the diameter of the blade portion B26 at the blade portion 28 is smaller than the diameter of the blade portion A25 at the blade portion 28 by about 2 mm.

The blade plate A25 and the blade plate B forming the set
26 has a press squeezed portion 29 on the edge end surface 27 side which is a bulged portion having a circular shape centered on the center. The height of the press drawing portion 29 is determined by the blade plates A25 and B2.
The thickness is set to be larger by the thickness of one sheet of paper than the thickness of the blade portion of No. 6. In the center of the blade plates A25 and B26, there is provided a regular hexagonal coupling hole 30 for inserting a hexagonally shaped shaft A24 for forming a cutter. Further, each blade plate A25, B26 has a blade plate A25,
Reference holes 31 and 32 for incorporating B26 into the cutter configuration shaft A24 are provided.

Next, a method of assembling the blade-plate laminated rotary cutter 9 according to the first embodiment will be described. As shown in FIG. 4, the blade plates A25 and B26 to be set are placed in the reference holes 31 and 32 in a direction in which the press drawing portions 29 face outward.
And match. With this state as one set of cutter blades, as shown in FIG. 5, a plurality of sets are laminated by fitting the coupling holes 30 to the cutter configuration shaft A24,
A metal drop-off prevention ring 33 is attached.

Here, the cutter blade set is assembled by rotating the reference hole 31 of the blade plate A25 by 60 degrees every four sets. In the first embodiment, a total of 29 sets are set on the cutter configuration shaft A24. Built in.

In the assembly, the flat washer 3
4. The corrugated washer 35 for adjusting the gap in assembly is used, and the cutter blade sets are fixed under a surface pressure with each other.
24 is incorporated without wobble or movement. In addition, by utilizing the elastic shrinkage of the corrugated washer 35, the blade plate stacking height caused by the variation in the plate thickness and the drawing depth existing in each blade plate due to the lamination of a plurality of blade plates, is obtained. Is absorbed by the shrinkage of the corrugated washer 35, and as a result, the assembly failure due to the variation can be improved.

By the above-mentioned assembly, the blade plates A butted against each other.
The blade portions 28a of the blades 25 and B26 are automatically disposed at a constant interval in the axial direction with respect to the cutter configuration shaft A24 by the convex press drawing portions 29 of the blade plates A25 and B26 facing each other. You. Further, between each cutter blade set, there is provided a separator 36 functioning as a stripping paper piece peeling device.
Has been arranged. This separator 36 is made of metal,
Each of the blade plates A25 and B26 has a hole whose thickness is 1 mm and which is larger than the outer diameter portion of the press drawing portion 29 of each of the blade plates A25 and B26. Also,
The separator 36 cannot be detached from the cutter blade set.

In the same manner, another blade-type laminated rotary cutter is assembled, and as shown in FIG. 6, when two blade-type laminated rotary cutters 9 are overlapped and combined with each other, the cutter blade sets are combined. The blade portions of the opposing cutter blade sets are inserted into the space between the cutter blade sets provided by the convex press narrowing portion 29,
At the same time, a gap A for one sheet of paper is automatically provided with the blade portion 28a of the cutter blade set.

The rotation of the two blade plate lamination type rotary cutters 9 having the blade plates 25 and 26 having the above-described shapes as a set,
The paper to be shredded is, for example, cut into 2 mm × 14 mm strip-shaped paper pieces by cross-cutting.

As described above, the two blade plates A25 and B26 are faced with the press-out sags, respectively, to form a cutter blade set. The portion 29 is formed. Then, a plurality of cutter blade sets are stacked on a cutter configuration shaft 24 forming a skeleton to constitute a blade plate lamination type rotary cutter. When two blade plate lamination type rotary cutters are combined, one blade plate lamination is performed. Between the cutter blade sets of the mold rotary cutter, the cutter blade set of the other blade plate lamination type rotary cutter that is opposed to the cutter blade set can be configured to be overlapped and sandwiched with a certain gap.

Further, the gap required for smoothly rotating the blade-plate-type rotary cutters is automatically constituted by the press drawing portion 29, and as a result, the speed of the separate member is reduced. This eliminates the need for a circuit, etc., thereby reducing the number of components and the number of assembly steps.

Furthermore, even when a force acts in the direction of inclining the cutter blade set in the blade plate laminated rotary cutter with respect to the cutter forming shaft during paper shredding, the joining portion of the cutter blade set to the cutter forming shaft. The width of the joint is larger than the thickness of the two blades, and the cutter blade set does not fluctuate or tilt with respect to the cutter shaft even under the above-mentioned force. Due to the load caused by the increase in the surface pressure between the cutter blade sets caused by stacking between the cutter blade sets, the paper shredding property and shredding efficiency deteriorate, and the chopped chips are clogged between the cutter blade sets. And stable paper shredding can be realized.

[0034]

As is apparent from the above description, the cutter device of the shredder according to the present invention has a structure in which the cutter portion is constituted by facing the two blade plate laminated type rotary cutters.
Since the opposed cutter blade set of the other blade plate rotary cutter is inserted between each cutter blade set of one blade plate rotary cutter, and a certain gap is formed between the respective cutter blade sets. This eliminates the need for a separate member for forming a certain gap, thereby reducing the number of components and reducing the number of assembly steps. In addition, since the cutter blade set is supported three-dimensionally with respect to the cutter configuration shaft, the cutter blade set is less likely to fluctuate or tilt due to the load caused by the shredded paper pieces when cutting the paper. It is possible to realize stable shredding of paper without deteriorating shredding property and shredding efficiency, and without causing clogging of shredded chips between cutter blade sets.

[Brief description of the drawings]

FIG. 1 is a side view of a shredder mechanism according to a first embodiment of the present invention.

FIG. 2 is a top view of a mechanism of the shredder.

FIG. 3 is a cross-sectional view of a cutter section in the shredder.

FIG. 4A is a cross-sectional view of a cutter blade set in a blade plate laminated rotary cutter. FIG. 4B is a side view of the cutter blade set. FIG. 4C is a plan view of the cutter blade set.

FIG. 5 is a side view showing a cross section of a part of the blade-type laminated rotary cutter.

FIG. 6 is a side view in which a part of a state in which two of the blade-plate laminated rotary cutters are combined is sectioned;

FIG. 7 is a side view of a cross section of a part of a conventional blade-plate laminated rotary cutter.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Main body case 2 Lower case 3 Chassis 9 Blade plate lamination type rotary cutter 12 Drive motor 24 Cutter configuration axis A 25 Blade plate A 26 Blade plate B 27 End face 28 Blade part 29 Press drawing part 33 Ring for preventing falling off 34 Flat Type Washer 35 Wave Type Washer 36 Separator A Gap

Claims (2)

[Claims] 1. A blade plate laminated rotary cutter is formed by fitting a plurality of blade plates having a coupling hole at the center thereof into a shaft for forming a cutter, and two of the blade plate laminated rotary cutters are provided with outer peripheral blades. A cutter device comprising parts arranged so as to bite into each other, wherein said blade plate is formed in a shape having a bulging portion including a coupling hole on an end surface, and said two blade plates are swelled with said bulging portion. Are overlapped to form one cutter blade set, the bulging portion secures a distance between the cutter blade sets, and the joining width of the joint portion of the cutter blade set to the cutter configuration shaft is 2. A cutter device for a shredder, wherein the thickness of the blade is larger than the thickness of the blade. 2. A cutter device for a shredder according to claim 1, wherein said blade plate is made of a metal plate, and said bulging portion is formed by press drawing.