JP2008023443A - Shredder - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a shredder capable of preventing shreds from staying. <P>SOLUTION: The hopper 30 of a paper treating device has a stay preventing mechanism 32 installed inside a funnel-type hopper body 31 which connects the upper opening part 31U with the lower opening part 31L by a peripheral side plate 31S. The stay preventing mechanism 32 is so constituted that a deformable supply accelerating tentacular element 32B is attached to an agitating rod 32A fixed to the screw 42 of a compressing unit 40 positioned in the lower part of the hopper 30 to accelerate the movement of cut pieces staying on the inner surface of the hopper body 31 by rotating the agitating rod 32A and the supply accelerating tentacular element 32B according to the rotation of the screw 42 in the inside of the hopper body 31. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention relates to a shredding device that shreds paper or the like into fine pieces.

For example, when a confidential document is discarded, the confidential document is generally shredded by a so-called shredder in order to prevent information leakage and protect privacy.
As such a shredder, a hopper having an opening corresponding to the shredding mechanism is provided on the lower side of the shredding mechanism for shredding paper, and the shredded pieces cut through the hopper are guided to a storage container or the like. Such a configuration is known (see, for example, Patent Document 1).
The shredder disclosed in Patent Document 1 is a method in which the shredded pieces shredded by a shredding mechanism are gathered together by a hopper, compressed, formed into a lump, and transferred to a storage container.

JP-A-6-306787

Here, as the hopper provided on the lower side of the shredding mechanism, a hopper that is formed in a funnel shape in which an upper opening having a size corresponding to the shredding mechanism and a lower opening having a small diameter are continuous with a predetermined gradient. is there. And the thin piece supplied to the upper opening part from the shredding mechanism is guide | induced to the lower opening part along the inclination. That is, the hopper collects the fine pieces that have fallen in a wide area and transports them to an arbitrary position connected from the lower opening.
In such a configuration, when the movement of the fine piece dropped from the shredding mechanism to the hopper is delayed, the fine piece accumulates in that portion. The accumulated fine fragments are in a lightly compressed state, and if collapsed in such a state, a large amount of fine fragments flows at a time, and a large load is applied to the subsequent process. Further, when the deposition reaches the shredding mechanism, there is a risk of causing a problem in the shredding mechanism.
Such a problem can also occur in a place other than the funnel-shaped hopper.

  The present invention has been made to solve the technical problems as described above, and an object of the present invention is to provide a shredding device that can prevent the retention of fine fragments.

For this purpose, the shredding device according to the present invention includes a shredding mechanism that shreds an input object into shredded pieces, and a shredded piece that opens toward the shredding mechanism and is shredded by the shredding mechanism. And a retention preventing mechanism that is provided inside the conveyance path member and prevents retention of fine fragments. The retention prevention mechanism moves and drives the movement promoting member and the movement promoting member. And a drive mechanism, wherein the movement promoting member that is moved and driven by the drive mechanism is configured to promote the movement of the fine piece on the inner surface of the conveyance path member.
Here, the movement promoting member can be characterized in that it is deformed when it comes into contact with the inner surface of the transport path member and is restored when the contact is released.

Another shredding processing apparatus of the present invention receives and transports a shredding mechanism that shreds an input object into shredded pieces, and a shredded piece that opens toward the shredding mechanism and is shredded by the shredding mechanism. Conveying path member, a retention preventing mechanism provided inside the conveying path member for preventing the retention of the fine fragments, a moving operation member for moving the fine fragments received by the conveying path member, and a driving means for driving the moving operation member And the retention preventing mechanism is configured to promote the movement of the fine piece on the inner surface of the conveyance path member by the movement promoting member that is driven to move by the driving means.
Here, the retention prevention mechanism may further include a supply promotion member that is connected to the movement operation member to promote the supply of the fine pieces, and the movement promotion member is connected to the supply promotion member. .

  According to the shredding treatment device of the present invention configured as described above, the movement promoting member can promote the movement of the fine pieces from the inner surface of the conveyance path member, and the retention of the fine pieces can be suppressed.

Embodiments of the present invention will be described below in detail with reference to the accompanying drawings.
FIG. 1 is an external view of a paper processing apparatus 10 as a shredding processing apparatus according to the present embodiment.
A paper processing apparatus 10 shown in FIG. 1 has a feeding section 13 into which a paper as an object to be shredded is placed on an upper surface section 12 of a main body section 11 constituting the main body of the apparatus. Then, processing (such as shredding processing) of the paper loaded in the loading unit 13 is performed, and the processed fine fragments are temporarily accommodated in the main body unit 11. The main body 11 is provided with an opening / closing door 14 that opens and closes when the fine piece accommodated therein is discharged out of the apparatus.

FIG. 2 is a schematic configuration diagram showing the inside of the paper processing apparatus 10, and FIG. 3 is an enlarged sectional view of the hopper 30 and the compression unit 40.
Inside the main body 11 of the paper processing apparatus 10, a shredding mechanism 20 that shreds the paper that has been put into the feeding unit 13, and the shredded pieces cut by the shredding mechanism 20 are compressed and agglomerated. A compression unit 40 is provided. A hopper 30 is provided between the chopping mechanism 20 and the compression unit 40 to guide the fine pieces cut by the chopping mechanism 20 to the compression unit 40.
Furthermore, a duct 50 that transports the fine pieces agglomerated by the compression unit 40 and a storage box 60 that stores the fine pieces transferred by the duct 50 are provided.

The chopping mechanism 20 includes a chopping portion 20A in which a first rotating blade shaft 21 and a second rotating blade shaft 22 are arranged substantially in parallel, a chopping motor 20M that drives the chopping portion 20A, It has.
The chopping portion 20A has a rectangular planar shape, and the chopping motor 20M is located on the side thereof.
The first rotary blade shaft 21 and the second rotary blade shaft 22 of the chopped portion 20A are provided with a plurality of rotary blades 21a and 22a at predetermined intervals in the axial direction. The rotary blades 21a and 22a are disk-shaped, and a plurality of blades are radially formed on the peripheral surface thereof. The rotary blades 21a and 22a provided on the rotary blade shafts 21 and 22 are alternately arranged. Yes. That is, the rotary blade 21a of the first rotary blade shaft 21 and the rotary blade 22a of the second rotary blade shaft 22 are arranged so as to be shifted in the axial direction, respectively, and one rotary blade 21a, 22a is rotated in the other direction. A predetermined amount is inserted between the blades 22a and 21a. Thereby, the superposition | polymerization area | region 23 where the rotary blades 21a and 22a of both rotary blade shafts 21 and 22 overlapped seeing in the axial direction is formed.

The 1st rotary blade axis | shaft 21 and the 2nd rotary blade axis | shaft 22 are rotationally driven by mutually reverse rotation by the chopping motor 20M.
That is, for example, normally (at the time of forward rotation), as indicated by an arrow in FIG. 2, the first rotary blade shaft 21 rotates in the clockwise direction, and the second rotary blade shaft 22 rotates in the counterclockwise direction. To do. Thereby, in the superposition | polymerization area | region 23, the rotary blades 21a and 22a move from the lower side toward the upper side.
Further, the rotational speed of the first rotary blade shaft 21 (the peripheral speed of the rotary blade 21a) and the rotational speed of the second rotary blade shaft 22 (the peripheral speed of the rotary blade 22a) are different. That is, the first rotary blade shaft 21 on the paper input side (input unit 13) rotates slowly (low speed), and the second rotary blade shaft 22 far from the paper input side rotates fast (high speed). . As the speed difference, for example, a double value can be adopted.
Note that the shredding motor 20M can reverse forward and reverse, and can also rotate the first rotary blade shaft 21 and the second rotary blade shaft 22 in the direction opposite to the arrow direction in FIG. It has become.

A compression unit 40 as a compression mechanism is provided below the chopping mechanism 20 with a hopper 30 interposed therebetween.
The hopper 30 continuously connects the upper opening 31U having a size corresponding to the chopping portion 20A of the chopping mechanism 20 and the lower opening 31L having a diameter corresponding to the introduction portion of the compression unit 40 by the inclined peripheral side plate 31S. Formed in a funnel shape. Then, the fine pieces falling from the shredding mechanism 20 are received and assembled, and supplied to the compression unit 40. The configuration of the hopper 30 will be described in detail later.

The compression unit 40 includes a substantially cylindrical housing 41 connected to the lower opening 31L of the hopper 30, a screw 42 as a moving operation member rotatably disposed inside the housing 41, and a driving means for the screw 42. As a compression motor 40M.
The screw 42 is configured by integrally providing a feed blade 42 b spirally continuous around a rotating shaft 42 a that is rotatably supported at the center of the housing 41.
The housing 41 includes an introduction pipe part 41a to which the hopper 30 is connected, a cylindrical transfer pipe part 41b continuous from the introduction pipe part 41a, and a compression pipe part 41c as a throttle member at the tip of the transfer pipe part 41b. Become.

The introduction pipe portion 41 a has a funnel shape substantially continuous with the gradient of the hopper 30 and is fixed to the frame 15 of the paper processing apparatus 10.
A drive ring 41d is rotatably mounted on the outer periphery of the upper end of the introduction pipe portion 41a via a bearing.
The drive ring 41d supports the screw 42 at the center by support bars 41e provided at three locations in the circumferential direction on the inner side. The drive ring 41d is a timing pulley having teeth on its outer periphery, and the drive ring 41d and the timing pulley 43 fixed to the shaft of the compression motor 40M are connected by a timing belt 44. As a result, the drive ring 41d is rotationally driven by the compression motor 40M, and the screw 42 is rotated accordingly.

The transfer pipe portion 41b has a cylindrical shape with an inner diameter close to the outer diameter of the feed blade 42b of the screw 42, and a plurality of small projections (not shown) extending in the length direction are formed on the inner surface over the entire circumference. Thereby, the rotation of the screw 42 prevents the internal fine fragments from rotating together with the screw 42 and smoothly transfers them to the compression tube portion 41c.
The compression tube portion 41c is formed in a tapered shape with a downstream opening having a small diameter with respect to the upstream portion where the inner diameter is continuous with the inner diameter of the transfer tube portion 41b. The diameter is to be reduced.
In the compression unit 40 having such a configuration, the screw 42 is rotationally driven by the compression motor 40M at a predetermined speed (for example, 70 rpm), and the fine pieces supplied via the hopper 30 are transferred from the introduction pipe part 41a to the transfer pipe part 41b. Then, it is transferred toward the compression tube portion 41c, compressed by the compression tube portion 41c, and sent out as a high-density lump.

Subsequent to the compression unit 40, a duct 50 and a storage box 60 are provided.
Although not shown in detail, the duct 50 is a pipe line bent so as to combine two substantially U shapes, and one end is connected to the downstream end (compression pipe part 41c) of the housing 41 of the compression unit 40, The other end opens at the top of the storage box 60. Then, the lump of fine fragments sent out from the compression unit 40 is guided to reach the storage box 60.
The storage box 60 is arranged to receive a mass of fine fragments transferred and discharged by the duct 50. The storage box 60 can be removed from the main body 11 by opening the door 14 (see FIG. 1).

The paper processing apparatus 10 configured as described above cuts the paper loaded into the loading unit 13 into fine pieces by the shredding mechanism 20 and compresses the fine pieces into a lump by the compression unit 40 and accommodates them. Discharge into box 60.
In other words, the shredding mechanism 20 breaks the paper until the first rotary blade shaft 21 and the second rotary blade shaft 22 pass through a filter at a predetermined interval (not shown) by tearing the paper fed at the speed difference. Repeat to make fine pieces.
The fine pieces fall into the hopper 30 and are guided to the compression unit 40 by the hopper 30.
The compression unit 40 compresses the fine fragments supplied from the hopper 30 by moving the inside of the housing 41 with a screw 42 that is rotationally driven by a compression motor 40M. The fine pieces made into a lump by the compression unit 40 move in the duct 50 by the pushing force from the compression unit 40 and are discharged to the storage box 60.

Next, the hopper 30 which is a main part of the present invention will be described in detail with reference to FIG. 3 and FIG. 4 described above.
FIG. 4 is a plan view of FIG.
The hopper 30 includes a stagnation prevention mechanism 32 inside a hopper body 31 serving as a conveyance path member.
The hopper body 31 is formed in a funnel shape in which the upper opening 31U and the lower opening 31L are continuous by the peripheral side plate 31S inclined at a predetermined angle as described above. The upper opening 31U has a rectangular shape corresponding to the chopping portion 20A of the chopping mechanism 20, and the lower opening 31L has a circular shape corresponding to the introduction pipe portion 41a of the housing 41 of the compression unit 40. In other words, the hopper body 31 is configured such that the fine pieces dropped in the rectangular upper opening 31U are guided by the inclined peripheral side plate 31S and gathered in the small circular lower opening 31L.

A plurality of plate-like guides 31G are intermittently mounted on the inner surface of the peripheral side plate 31S in the circumferential direction with the plate surface as the vertical direction, and the guides 31G rotate together with the stay prevention mechanism 32 described later. The movement to the lower opening 31L is guided smoothly.
The hopper body 31 is fixed to the frame 15 by the stay 33 and is provided immediately above the introduction pipe portion 41a (drive ring 41d) of the compression unit 40.
In the present embodiment, as shown in FIG. 4, the lower opening 31L is located offset from the center of the upper opening 31U. This is set according to the arrangement relationship with other mechanisms such as the shredding motor 20M and the compression motor 40M.

The stay prevention mechanism 32 provided inside the hopper 30 includes a stirring rod 32A as a supply promoting member and a movement promoting contact 32B as a movement promoting member.
The stirrer rod 32A is formed by bending a plate having a predetermined thickness and a predetermined width made of a material having rigidity such as metal and bent upward at a predetermined angle across the center. And in the center part, it fixes to the upper end surface of the rotating shaft 42a of the screw 42 of the compression unit 40 located under the hopper 30 so that relative rotation is impossible with a screw. Thereby, the stirring rod 32 </ b> A is configured to rotate inside the hopper body 31 as the screw 42 of the compression unit 40 rotates. The tip of the stirring rod 32A is set as close as possible to the inner surface of the hopper body 31 (the peripheral side plate 31S) and not in contact therewith.

  The movement promoting touch element 32B is a string-like member formed of a deformable material, and is fixed to one end of the stirring rod 32A at the base end. As shown by an imaginary line in FIG. 4, the length is set so that the tip can reach the corner of the remotest upper opening 31 </ b> U with a margin when stretched linearly. As the deformable material, a material formed by twisting a fiber such as natural or synthetic fiber or a thin metal wire, a material formed by a single material such as a synthetic resin or rubber, or the like can be used. It works even if it does not have elasticity, but it can be easily deformed when it comes into contact with the inner surface of the hopper body 31, and if it has elasticity that can be restored after contact with a fine piece, it can be restored. Therefore, since the contact portion moves in a state of being in contact with the inner surface of the hopper main body 31, it is more preferable to obtain a movement promoting effect of a high fine piece. The cross-sectional shape is not particularly limited, and may be any shape such as a circle or a rectangle (that is, a belt shape). Further, a plurality of members may be connected and used instead of a single member.

In the hopper 30 configured as described above, the stirring rod 32 </ b> A and the movement promoting contact 32 </ b> B of the stay prevention mechanism 32 rotate as the compression unit 40 is driven (rotation of the screw 42) and are supplied from the shredding mechanism 20. This prevents the fine fragments from staying on the inner surface of the hopper body 31.
That is, the stirring rod 32A directly contacts the fine pieces remaining on the inner surface of the hopper main body 31 by the rotation thereof, and promotes the supply (movement) of the fine pieces by the air flow caused by the rotation.

  The movement promoting contact 32B rotates together with the stirring rod 32A. As described above, the movement promoting contact 32B is formed by a deformable material so that its tip can reach the farthest corner of the upper opening 31U of the hopper body 31 with a margin. The tip portion tends to reach the outer peripheral side by force, and as shown by a broken line in FIG. 4, the tip portion bends and moves along the inner surface of the hopper body 31 as it comes into contact with the inner surface of the hopper body 31. As a result, the tip of the movement promoting contact 32B also comes into contact with the fine piece located outside the range to which the action of the stirring rod 32A extends, and promotes the movement of the fine piece. Further, the impact when the movement promoting contact 32B comes into contact with the inner surface of the hopper body 31 promotes the movement of the fine pieces.

That is, the position of the lower opening 31L of the hopper body 31 (that is, the position of the compression unit 40 connected to the lower side) is deviated (eccentric) from the center of the upper opening 31U as described above. The distance between the rod 32A and the inner surface of the hopper body 31 on the side opposite to the eccentric side is wide, and since the upper opening 31U is rectangular, the corner is further away from the stirring rod 32A. The movement-promoting touch element 32B is freely deformed to reach an area outside the range where the stirrer rod 32A has the effect of suppressing the retention of the fine fragments, and promotes the movement of the fine fragments to prevent the retention.
By such an action of the stirring rod 32A and the movement promoting contact 32B, the hopper 30 smoothly collects the fine fragments supplied from the shredding mechanism 20 in the lower opening 31L and sends them to the compression unit 40. be able to.
As a result, it is possible to prevent an increase in driving resistance due to the supply of the fine pieces that have been deposited and become lightly compressed to the compression unit 40, and problems that the accumulation reaches the shredding mechanism 20 and invites. In addition, as the retention factors of the fine fragments, there are static electricity generated at the time of shredding, protrusions such as a sensor, adhesives attached to recording paper such as glue and toner, and the like.

FIG. 5 is a plan view of the hopper 30 equipped with the movement promoting touch elements 32C having different configuration examples.
The movement promoting contact 32C shown in FIG. 5 has the same shape and material as the above-described movement promoting contact 32B, but is provided with a weight 32W as a weight member made of a material having a large specific gravity such as metal at the tip. is there. With this configuration, the distal end portion reaches the outer peripheral side due to the centrifugal force acting on the weight 32W by the rotation, and the movement of the fine pieces is promoted by the impact when the weight 32W contacts the hopper body 31. The effect is greater. In particular, a great effect can be obtained when the material of the movement promoting contact 32C does not have elasticity.

In addition, this invention is not limited to the said embodiment, It can change suitably.
For example, the shredding mechanism 20 of the above configuration example is to tear paper to make a fine piece, but the object to be shred is not limited to paper, and is also applicable to a piece to be cut into fine pieces by a cutter. Of course, it may be.
Further, in the above configuration example, the movement promoting contact 32B is rotationally driven within the hopper body 31 by the compression motor 40M of the compression unit 40. However, a separate movement driving means for moving and driving the movement promoting contact 32B is provided. Also good. Further, the movement is not limited to rotation, but may be configured to reciprocate only in a range where the action of the stirring rod 32A does not reach using a link or the like.

It is an external appearance perspective view of the paper processing apparatus concerning this embodiment. It is a schematic block diagram which shows the inside of a paper processing apparatus. It is an expanded sectional view of a hopper and a compression unit. FIG. 4 is a plan view of FIG. 3. It is a top view of a hopper provided with the movement promotion toucher of a different structure.

Explanation of symbols

DESCRIPTION OF SYMBOLS 10 ... Paper processing apparatus (shredding processing apparatus), 20 ... Shredding mechanism, 30 ... Hopper, 31 ... Hopper main body (conveyance path member), 32 ... Retention prevention mechanism, 32A ... Stir rod (supply promotion member), 32B, 32C: Movement promoting contact (movement promoting member), 32W: Weight (weight member), 40 ... Compression unit (compression mechanism), 40M ... Compression motor (driving means), 41c ... Compression pipe part (throttle member), 42 ... Screw (moving operation member)

Claims (4)

A shredding mechanism that shreds the input object into small pieces;
A transport path member that opens toward the shredding mechanism and receives and transports the fine pieces shredded by the shredding mechanism; and
A retention preventing mechanism provided inside the conveyance path member to prevent retention of fine fragments,
The retention prevention mechanism is
A movement promoting member;
A drive mechanism for moving and driving the movement promoting member,
The shredding device, wherein the movement promoting member driven to move by the drive mechanism is configured to promote movement of a fine piece on the inner surface of the transport path member.   The shredding device according to claim 1, wherein the movement promoting member is formed so as to be deformed when coming into contact with an inner surface of the transport path member and to be restored when the contact is released. A shredding mechanism that shreds the input object into small pieces;
A transport path member that opens toward the shredding mechanism and receives and transports the fine pieces shredded by the shredding mechanism; and
A retention preventing mechanism provided inside the conveying path member to prevent retention of fine fragments;
A movement operation member for moving the fine piece received by the conveyance path member;
Driving means for driving the moving operation member,
The retention prevention mechanism is
A shredding treatment device configured to promote movement of a fine piece on an inner surface of the transport path member by a movement promoting member that is driven to move by the driving means. The retention prevention mechanism further includes a supply promoting member that is connected to the moving operation member and promotes the supply of fine fragments,
4. The shredding device according to claim 3, wherein the movement promoting member is connected to the supply promoting member.

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