JP2008126118A - Structure of rotary blade in shredder - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a structure of rotary blades capable of avoiding clogging of sheet materials between round blades and facilitating manufacture and maintenance. <P>SOLUTION: In the structure 1 of the rotary blades in a shredder with a plurality of the round blades 53 installed on a rotary shaft 52 at equal intervals, the peripheral parts of the round blades successively inserted into the rotary shaft are housed in a partially exposed state in a unit case 54', thereby facilitating the manufacture of various shredders at low costs and allowing an easy maintenance. Even when minute cut dust is scattered, it is prevented from adhering to the round blades or from coming in between the round blades. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention relates to a rotary blade structure used in a shredder for finely cutting a sheet material such as paper or a compact disk, or a card cutting machine for cutting cards such as business cards into a predetermined size. The present invention relates to a rotary blade structure that can avoid clogging of sheet material between round blades and that is easy to manufacture and maintain.

In a cutting machine having a structure in which a sheet material is cut by a rotary blade, various techniques have been proposed for preventing a sheet from being caught in the rotary blade and causing a paper jam or the like.
For example, in a shredder that shreds while conveying a sheet with a rotary blade, as shown in Patent Document 1, a clamp-shaped anti-winding guide body is sandwiched between round blades arranged at equal intervals on the rotary shaft, A technique has been proposed in which the sheet material is prevented from wrapping around between the round blades by covering the semicircular region of the outer surface of the rotating shaft with the winding prevention guide body.

On the other hand, as a method of disposing a round blade on the rotary shaft, in Patent Document 2, the rotary shaft has a hexagonal cross-sectional shape, and a shaft hole having the same shape as the cross-sectional shape is provided in the rotary blade. A method is disclosed in which pieces are alternately arranged on a rotating shaft. A guide member having a paper piece insertion guide piece is attached to the outer surface of the spacing piece.
JP 2000-354784 A JP-A-8-1579

However, although the technique disclosed in Patent Document 1 can prevent the sheet material from wrapping around between the round blades by the entrainment prevention guide, there is no member that covers the round blades. There is a possibility that a small facet will get in between. In addition, since the rotating shaft to which a plurality of round blades are attached is clamped from the outside by an entrainment prevention guide, first, in manufacturing, the rotating blade is formed by fixing the round blade to the rotating shaft with screws or screws. Since the winding prevention guides are clamped one by one in the gap between the round blades of the rotary blade, many processes are required and the operation is complicated. Also, if one of the round blades breaks, the entire rotating blade must be replaced, increasing maintenance costs.

  On the other hand, in the technique disclosed in Patent Document 2, when one round blade is damaged, it is convenient that only the round blade can be removed and replaced, but there is no member that covers the rotary blade. When fine chips are scattered, the chips may adhere to the round blade, or the facet may enter the gap between the round blade and the guide member. Further, it is not possible to effectively prevent the sneaking around of the chips.

  Therefore, an object of the present invention is to provide a rotary blade structure that can avoid clogging of sheet material between round blades and that is easy to manufacture and maintain in a cutting machine that cuts a sheet material with a rotary blade.

In order to solve the above-described problems, the present invention provides a rotary blade structure in which a plurality of round blades are provided at equal intervals on a rotary shaft, and the round blades are unitized in a state where a peripheral portion of the round blade is partially exposed. It is characterized in that it is configured by being housed in a case and sequentially inserting the round blades accommodated in the unit case into the rotating shaft.
In this case, the unit case may be provided with an insertion hole through which the connecting rod is inserted.

In addition, a fitting portion may be provided on one surface of the unit case, and a fitted portion that fits on a fitting portion of an adjacent unit case may be provided on the other surface.
The unit case may be made of a resin member.
Furthermore, the rotating shaft may have a cross-sectional shape having at least one corner, and the round blade may have a shaft hole having a shape corresponding to the cross-sectional shape of the rotating shaft.

The rotary blade structure according to claim 1 is configured such that the round blade is accommodated in a unit case with the peripheral edge of the round blade partially exposed, and the round blades accommodated in the unit case are sequentially inserted into the rotation shaft. Therefore, manufacture is easy.
In addition, by preparing a rotating shaft according to the size of the cutting machine and connecting a set of round blades and unit cases according to the length of the rotating shaft, manufacturing cutting machines of various sizes Is possible. As a result, the burden of manufacturing parts corresponding to the size of the cutting machine is reduced, so that various cutting machines can be manufactured at low cost.

In addition, if one of the round blades is damaged, the round blades housed in the unit case can be removed from the rotating shaft one after another, and only the damaged round blades need to be replaced, making maintenance inexpensive and easy. It is.
Furthermore, since the round blade is housed in the unit case except for a part of the peripheral edge, even if fine chips are scattered, the chips adhere to the round blade or cut between the round blades. It is possible to effectively prevent debris from turning around.

In the rotary blade structure according to the second aspect, since the unit case is provided with the insertion hole through which the connecting rod is inserted, the round blade accommodated in the unit case can be easily connected.
The rotary blade structure according to the third aspect is accommodated in the unit case because the fitting portion is provided on one surface and the fitted portion that is fitted to the fitting portion of the unit case adjacent to the other surface is provided. It is possible to easily connect and fix the round blades in the state where they are in contact.

  In the rotary blade structure according to claim 4, since the unit case is made of a resin member, even if the round blade contacts the cover member, the round blade can be prevented from being damaged. The gap between the cover member and the cover member can be reduced as much as possible. Accordingly, cutting scraps and face pieces adhering to the round blade can be scraped off at the edge of the cover member, so that the sheet material can be prevented from clogging between the rotary blades.

  In the rotary blade structure according to claim 5, the rotary shaft has a cross-sectional shape having at least one corner, and the round blade has an axial hole corresponding to the cross-sectional shape of the rotary shaft. The round blade can be fixed to the rotating shaft simply by inserting the. As a result, the round blade can be fixed to the rotating shaft so as not to move in the rotational direction, and it is not necessary to fix the round blade with screws or screws.

  Preferred embodiments of the present invention will be described with reference to the accompanying drawings. In addition, embodiment is not limited to the following forms, Other aspects are possible if the subject of this invention can be solved.

FIG. 1 is a perspective view showing a rotary blade structure 1 of a cutting machine according to an embodiment of the present invention. This rotary blade structure 1 is applied to the shredded portion 5 of the shredder 2 shown in FIG.
First, the shredder 2 to which the inlet structure 1 according to the present invention is applied will be described.
The shredder 2 is used for chopping a sheet-like object such as paper or a compact disc, and the shredded object fed from the slot 3 is shredded by a shredder 5 provided inside the housing. The waste container 6 is disposed below the shredder 5 and is discharged.

The housing of the shredder 2 includes a housing body 4 and a wall surface member 10, an introduction surface 41 that extends from the front side of the housing body 4 toward the inside of the housing, and a wall surface member 10 that is attached to the back side of the housing body 4. The object to be shredded is inserted into the gap (that is, the inlet 3).
That is, as shown in FIG. 3, the upper surface of the housing body 4 has a large opening on the back side, and an introduction surface 41 is formed from the front side toward the center. The introduction surface 41 is a curved surface that smoothly curves toward the inside of the housing.

A wall surface member 10 shown in FIG. 4 is attached so as to cover the introduction surface 41 of the housing body 4.
When the wall surface member 10 is attached to the housing main body 4, the upper surface portion 11 forms a wall surface facing the input port 3, and the passage surface 14 formed on the back surface portion on the input port side 12 and the introduction of the housing main body 4. A passage 9 having a predetermined width is formed by the surface 41.

A fitting recess 15 and a stepped portion 16 are formed on the back surface portion on the back surface side 13 to which the wall surface member 10 is attached.
As shown in FIG. 5A, the fitting recess 15 accommodates a fitting protrusion 21 of the lock member 20 described later to maintain the fitting state between the wall surface member 10 and the lock member 20. The step portions 16 and 16 adjacent to both sides of the passage 9 are gradually widened in a stepwise manner by moving each step portion while being locked to a locking portion 22 of a locking member 20 described later. It is a part for making it.

  The steps of the step portions 16 and 16 are designed to have a height (for example, about 1 mm) that can be jumped over by an external force of a predetermined value or more, and in an initial state in which the wall member 10 is attached to the housing body 4. As shown in FIG. 5 (b), the locking portion 22 is locked to the starting stage portion 16 a located on the mounting side of the wall surface member 10, and the wall surface member 10 is displaced toward the back surface side 13. Each step of the staircase portion 16 is locked to the locking portion 22, and the fitting convex portion 21 of the locking member 20 comes into contact with the inner wall 15 a of the fitting concave portion 15 of the wall surface member 10. The amount of displacement can be regulated.

  The lock member 20 is for detachably attaching the wall surface member 10 to the housing body 4, and a fitting convex portion 21 protrudes from the center of the upper edge portion, and locking portions 22, 22 are formed on both sides thereof. ing. The fitting convex portion 21 is a portion that fits with the fitting concave portion 15 of the wall surface member 10, and the locking portions 22 and 22 are portions that are locked to the stepped portion of the wall surface member 10.

The lock member 20 is disposed inside the side wall surface of the housing body 4 with the fitting convex portion 21 facing upward, and the fitting convex portion 21 is fitted into the fitting concave portion 15 of the wall surface member 10. Thus, the wall surface member 10 is attached to the housing body 4 (see FIG. 5A). At this time, the locking portion 22 of the lock member 20 is positioned at the start step portion 16a of the step portion 16 of the wall surface member 10 (see FIG. 5B).
A space for accommodating the spring 30 is formed in the lock member 20, and an operation portion 24 for displacing the lock member 20 biased upward by the spring 30 downward is provided on the opposite surface. Is formed.

The housing body 4 is provided with an attachment portion 31 for attaching the spring 30 and a small hole 32 in the vicinity thereof, and the operation portion 24 of the lock member 20 is exposed from the hole 32 to the outside of the housing. ing.
The lower end portion of the spring 30 is attached to the attachment portion 31 of the housing body 4 and accommodated in the space portion of the lock member 20, whereby the lock member 20 is biased upward and the fitting convex portion 21 is fitted to the wall member 10. It fits into the recess 15.

When the fitting state between the lock member 20 and the wall surface member 10 is released, the operation portion 24 of the lock member 20 is pushed downward. Then, the wall member 10 is lifted obliquely upward while the operation part 24 is pushed down, so that the fitting convex part 21 of the lock member 20 comes out of the fitting concave part 15 of the wall member 10 and the width of the passage 9 is increased. Widened.
A micro switch 8 for detecting the displacement of the wall surface member 10 is attached to the inner wall surface of the housing body 4. When the passage 9 is widened by the displacement of the wall surface member 10, rotary blades 51 and 58 described later stop. It has come to be.

Inside the housing, a passage 9 is formed from the inlet 3 to the shredding portion 5, and the shredding portion 5 for performing shredding processing is fixed to the frame 7 below the passage 9. Has been.
The chopping portion 5 is composed of a slitting rotary blade 51 for cutting the object to be cut in the vertical direction and a crosscutting rotary blade 58 for cutting in an oblique direction. The rotary blade structure according to the present invention. Is applied to the rotary blade 51 for the slit.
Hereinafter, the rotary blade structure 1 according to the present embodiment will be described in detail.

As shown in FIG. 6, the rotary blade 51 for slit arranged continuously in the passage 9 from the insertion port 3 is opposed to the rotary blade cases 54 a and 54 b in a state where the two rotary blades 51 a and 51 b are accommodated in the rotary blade cases 54 a and 54 b. Has been placed.
The rotary blade structure 1 includes a first rotary blade 51a configured by providing a plurality of round blades 53a on a rotary shaft 52a extending in a direction orthogonal to the sheet conveyance direction, and the first rotary blade 51a and the sheet. The second rotary blade 51b is disposed opposite to the conveyance path and rotates in the direction opposite to the first rotary blade 51a. The round blades 53a and 53b of the rotary blades 51a and 51b slide on each other. The sheet is cut by contact. That is, as shown in FIG. 1, the first rotary blades 51a and 51b are formed by arranging disk-like round blades 53 at equal intervals on the rotary shaft 52, and are arranged in parallel with the axis direction being horizontal. .

The first rotary blades 51a and 51b are covered with rotary blade cases 54a and 54b as cover members. In this case, the rotary blade cases 54a and 54b have concave portions 57a and 57b corresponding to the shapes of the disk-shaped round blades 53a and 53b, and the peripheral edge portions where the round blades 53a and 53b are slidably contacted are exposed. The rotary blades 51a and 51b are covered.
That is, the rotary blade cases 54a and 54b are formed by joining a plurality of unit cases 54 'having a concave portion 57 in which one round blade 53 shown in FIG. 7 is accommodated with the concave portion 57 facing in the same direction. It is configured. In this case, the concave portion 57 of the unit case 54 ′ is formed in a shape such that the peripheral edge of the round blade 53 is partially exposed from the case when the round blade 53 is accommodated, and the exposed round blade 53a. , 53b, the two rotary blades 51a, 51b are arranged in parallel so that the peripheral edges thereof are in contact with each other.

That is, the concave portion 57 of the unit case 54 ′ has a bottom surface portion 60 having a shape lacking a part of the round blade 53, and an inner wall surface 61 that is curved in a dominant arc shape corresponding to the peripheral edge of the round blade 53. As shown in FIG. 8, the round blade 53 is slightly exposed from the end surface 62 of the unit case 54 ′ by accommodating the round blade 53. Note that the height of the inner wall surface 61 (that is, the depth of the recess 57) is such that when the two rotary blades 51a and 51b are juxtaposed, the peripheral portions of both the round blades 53a and 53b are brought into contact with each other. Thus, the width of the unit case is ½.
A shaft hole 63 through which a rotation shaft 52 (described later) is inserted is provided in the bottom surface portion 60 of the recess 57 of the unit case 54 ′, and an insertion hole 71 through which a connecting rod 70 (described later) is inserted is provided at the corner. Is provided.

The unit case 54 ′ is formed of a synthetic resin such as ABS resin (acrylonitrile / butadiene / styrene resin), POM resin (polyoxymethylene resin), or the like. Thus, by forming the rotary blade case 54 from a synthetic resin material, even if the rotary blade 51 comes into contact with the rotary blade case 54, the cutting edge is not damaged. It is possible to mold into a shape such that almost no gap is generated between the recess 57.
As a result, when shredded chips or chips adhere to the cutting edge of the round blade 53 during shredding, shredded scraps and the like are scraped off at the end face 62 of the rotary blade case 54. It is possible to prevent clogging of trash.

In this case, when the rotary blades 51 covered by the rotary blade case 54 are arranged in parallel, the unit case is so formed that the gap M between the rotary blade cases 54a and 54b is smaller than the thickness of the infant's finger. A concave portion 57 of 54 'is formed. Infants are assumed to be about 1 to 5 years old.
The thickness of the finger is the length N shown in FIG. 9, and it is preferable to design the gap M, for example, about 2 mm.
In this way, when the rotary blades 51a and 51b are arranged in parallel, the space M that is exposed in a state where the blade edges of the round blades 53a and 53b are in contact with each other is set as a gap M so that an infant's finger cannot enter. The operator's finger is prevented from touching the rotary blade 51 directly.

The round blade 53 of the rotary blade 51 may have any configuration. In the case of the present embodiment, as shown in FIG. 10, a thin blade 55 having a sharp blade portion on the peripheral surface is used as a disk-shaped spacer. Affixed on both sides. Cutting is performed in the vertical direction while the object to be cut is wound around the peripheral edge of each of the thin blades 55 arranged to face each other.
A shaft hole 56 having the same shape as the cross-sectional shape of the rotary shaft 52 is formed at the center of the round blade 53, and the round blade 53 accommodated in the unit case 54 ′ is rotated as shown in FIG. By sequentially inserting the shaft 52 into the shaft 52, the rotating blade 51 in a state of being covered with the rotating blade cover 54 with the plurality of round blades 53 arranged at equal intervals on the rotating shaft 52 of FIG. 1 is configured.

In the present embodiment, the cross-sectional shape of the rotating shaft 52 is formed in a hexagonal shape, but it may be any shape that has at least one corner or protrusion so that the round blade 53 does not move in the rotation direction. For example, it may be a polygon such as a triangle or a quadrangle, or a semicircular shape.
Further, when connecting the unit case 54 ′ in a state in which the round blade 53 is accommodated, as shown in FIG. 11, the unit case 54 ′ is inserted into the rotating shaft 52 while the connection hole 71 is inserted through the connection rod 70. . Then, the rotary shaft 52 of the rotary blade 51 is rotatably supported in the shaft hole 73 of the frame 72, and the connecting rod 70 inserted in the small hole 74 provided in the mounting frame 7 is fixed with the screw 75. The rotating blade cover 54 can be configured in a state in which a plurality of connected unit cases 54 ′ are fixed and a plurality of concave portions 57 are provided in a solid resin member.

  By producing two such rotary blades 51 and arranging them alternately so that the peripheral edges of the exposed round blades 53a and 53b are in contact with each other (see FIG. 6), the rotation according to this embodiment is performed. The blade structure 1 can be manufactured. In this case, the shaft hole 73 of the frame 72 is opened at such an interval that the blade tips of the respective round blades are in sliding contact with each of the rotary shafts 52a and 52b.

Below the slit rotary blade 51, a cross-cut rotary blade 58 for cutting an object to be cut cut in the vertical direction by the rotary blade 51 in an oblique direction is disposed. A guard member 59 is provided for preventing a hand from being inserted in the direction of the cross-cutting rotary blade 58 from the space formed when the waste collection box 6 is pulled out (see FIG. 2). .
Each of the rotary blades 51 and 58 is rotated when a sensor (not shown) provided on the introduction surface 41 detects the passage of the shredded object. A drive motor for rotating these rotary blades 51 and 58 is connected to a power supply circuit that is closed by turning on a power switch (not shown) provided in the housing body 4.

The usage state of the shredder 2 having the above configuration will be described.
When the shredding operation is performed, an object to be shredded is put into the loading port 3 in the state shown in FIG. The shredded object slides down the introduction surface 41 and is cut in the vertical direction while being wound around the first rotary blade 51 inside the housing. And it cut | judged finely by cutting in the diagonal direction with the rotary blade 58 for cross cuts.

At this time, when a finger or the like is likely to be inserted into the insertion port 3 together with the shredded paper, an external force is applied in the horizontal direction to the wall surface member 10, so that the step of the stepped portion 16 of the wall surface member 10 is locked It latches to the part 22 (refer FIG.12 (b)), and the channel | path 9 of a to-be-chopped object is expanded a little. When the passage 9 is widened, the operator pulls it out with the finger. At this time, since the passage 9 is widened, the finger can be easily pulled out.

In the unlikely event that a finger is vigorously inserted together with the shredded object 9, a large external force is applied to the wall surface member 10, so that each step of the stepped portion 16 of the wall surface member 10 is related to the locking member 20. It moves while being locked to the stop portion 22 (see FIG. 13B), and the passage 9 of the shredded object is greatly widened.
Thus, even when the passage 9 is greatly widened, as shown in FIG. 13A, the fitting between the wall surface member 10 and the lock member 20 is maintained, and Since the movement range is regulated, it is possible to prevent the wall surface member 10 from separating excessively and the fingers from entering through the gap vigorously.

  Further, even when the finger has entered the housing vigorously, the rotary blade 51 is covered with the rotary blade cover 54, and the space portion exposed when the blade edges of the round blades 53a and 53b are in contact with each other is provided. Since the gap M is such that an infant's finger cannot enter, the invading finger does not directly touch the round blade 53. Thereby, the safety | security in the insertion port 3 of the shredder 2 can be improved.

When the shredded object is caught in the shredder blade 51 during the shredding operation, as shown in FIG. 30 is compressed and the fitting convex part 21 of the lock member 20 is lowered to the position where it is pulled out from the fitting concave part 15. Then, the wall surface member 10 is further moved obliquely upward and stopped at the unlocking position shown in FIG. Since the fitting state between the wall surface member 10 and the lock member 20 can be released in this way, the wall surface member 10 can be largely separated from the housing body 4 to remove the bitten object. It becomes possible.
In addition, when the round blade 53 is consumed, maintenance can be easily performed by removing the round blade 53 accommodated in the unit case 54 ′ from the rotating shaft 52 and replacing it with a new round blade 53.

In the present invention, as shown in FIG. 15, the unit case 54 ′ is connected by providing a fitting portion 76 on the surface of the unit case 54 ′ where the recess 57 is provided, and on the back side of the adjacent unit case 54. You may provide the to-be-fitted part 77 fitted to a fitting part.
Further, the rotary blade structure of the present invention may be applied to the slitter unit of the cutting machine, and the pair of rotary blades covered by the rotary blade cover are arranged in parallel with a gap wider than the thickness of the infant's finger. It may be.

  The present invention can be applied to a rotary blade of a cutting machine used in all industrial fields such as home use, office use, and industrial use.

It is a perspective view which shows the rotary blade structure of the cutting machine which concerns on embodiment of this invention. It is a cross-sectional perspective view which shows the state which cut | disconnected the horizontal direction center part of the cutting machine with which the said rotary blade structure is applied. It is the cross-sectional perspective view which looked at the state which removed the wall surface member of the said cutting machine from the back side. It is a perspective view which shows a wall surface member. It is sectional drawing which shows the structure of the insertion port of the said cutting machine, (a) shows the state which cut | disconnected the horizontal direction center part, (b) shows the state which cut | disconnected AA in FIG. It is explanatory drawing which shows the said rotary blade structure. It is a perspective view which shows the structure of a unit case. It is a perspective view which shows the round blade of the state accommodated in the said unit case. It is explanatory drawing which shows the thickness of a finger | toe. It is a perspective view which shows the structure of a round blade. It is a perspective view which shows the assembly method of a rotary blade. The state where the thick thing was inserted in the insertion port of a cutting machine is shown, (a) cut | disconnected the horizontal direction center part of a cutting machine, (b) cut | disconnected the vicinity. The state when a finger or the like is inserted into the insertion port and a large external pressure is applied to the pressing member is shown. (A) is a cut at the center in the horizontal direction of the cutting machine, and (b) is a cut at the vicinity thereof. It is. The state in which the lock member is released is shown. (A) is a cross-sectional central portion of the cutting machine at the time of unlocking operation, and (b) is the center in the state where the wall member is largely pulled away from the housing. The vicinity of the part is cut It is a front view which shows the modification of the rotary blade structure which concerns on this invention.

Explanation of symbols

1 ... Rotating blade structure 2 ... Shredder (cutting machine)
DESCRIPTION OF SYMBOLS 3 ... Input port 4 ... Housing main body 5 ... Shredded part 6 ... Waste container 7 ... Frame 9 ... Passage 10 ... Wall surface member 11 ... Upper surface part 12. ································································································································ 15 Stop part 24 ... Operation part 30 ... Spring 31 ... Mounting part 32 ... Hole 41 ... Introducing surface 51 ... Rotating blade 52 ... Rotating shaft 53 ... Round blade 54 ..Rotating blade case (case member)
54 '... Unit case 55 ... Thin blade 56 ... Shaft hole 57 ... Recess 58 ... Cross-cut rotary blade 59 ... Guard member 60 ... Bottom face 61 ... Inner wall surface 62 ... End face 63 ... Shaft hole 70 ... Connecting rod 71 ... Insertion hole 72 ... Frame 73 ... Shaft hole 74 ... Small hole 75 ... Screw 76 ... Fit Joint part 77 ・ ・ ・ Fitted part

Claims (5)

In the rotary blade structure of a cutting machine in which a plurality of round blades (53) are provided at equal intervals on the rotary shaft (52),
The round blade (53) is accommodated in the unit case (54 ') with the peripheral edge of the round blade (53) partially exposed, and the round blade (53) accommodated in the unit case (54') The rotary blade structure of the cutting machine, wherein the rotary shaft (52) is sequentially inserted.   The rotary blade structure of the cutting machine according to claim 1, wherein the unit case (54 ') is provided with an insertion hole (71) through which the connecting rod (70) is inserted.   A fitting portion (76) is provided on one surface of the unit case (54 '), and a fitting portion (77) that is fitted to a fitting portion of an adjacent unit case is provided on the other surface. The rotary blade structure of a cutting machine according to claim 1 or 2, characterized in that   The rotary blade structure of a cutting machine according to any one of claims 1 to 3, wherein the unit case (54 ') is made of a resin member. The rotating shaft (52) has a cross-sectional shape having at least one corner,
The said round blade (53) has a shaft hole (56) of the shape corresponding to the cross-sectional shape of the said rotating shaft (52), The claim 1 characterized by the above-mentioned. Rotary blade structure of the cutting machine.

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