JP2020014988A - Shredder - Google Patents

Abstract

To provide a shredder in which sheet materials in an overlapped state can be cut off and then supplied to a shredding unit.SOLUTION: The shredder comprises a shredding unit 1 comprising rotary blades 14 and 15 for shredding, a placement unit 3 on which sheet materials are placed and a supply unit 2 that contacts the placed sheet materials to supply the materials to the shredding unit 1, where separating means 7 that separates an uppermost sheet material supplied by the supply unit 2 from a sheet material under the uppermost sheet material is provided between the shredding unit 1 and the supply unit 2.SELECTED DRAWING: Figure 4

Description

  The present invention relates to a shredder with an automatic feed function for automatically supplying a sheet material to a shredding unit.

  For example, `` a paper table and means for automatically feeding the paper placed and set on the paper table to the paper drop opening for the cutter are provided, and the gap width of the paper drop port is set in accordance with the number of sheets that can be cut by the cutter. The automatic paper feeding means is means for vibrating, moving, or swinging the paper table. "A shredder is disclosed (Patent Document 1).

JP-A-5-277392

The technique of Patent Literature 1 has a problem that it is difficult to adjust the number of sheets fed to the shredding unit, that is, the sheet material is supplied in an overlapping state.
The present invention has been made in view of such circumstances, and an object of the present invention is to provide a shredder capable of separating an overlapped sheet material and supplying the sheet material to a shredding unit.

  In order to solve the above-described problems, a shredder according to one embodiment of the present invention includes a shredding unit including a rotary blade for shredding, a placement unit for placing a sheet material, and a sheet unit placed on the shredder. A supply unit that abuts and supplies to the shredding unit, a separation unit that separates a top sheet material supplied by the supply unit and a sheet material lower than the top sheet material, It is provided between the shredding unit and the supply unit.

  ADVANTAGE OF THE INVENTION According to this invention, since it has a separation means, the sheet material of an overlapping state can be separated.

It is a perspective view showing the shredder concerning a 1st embodiment, (a) shows a state where a lid is closed, and (b) shows a state where a lid is opened. It is a longitudinal section perspective view of a shredder. It is a perspective view showing the state where an upper main part was removed. FIG. 3 is an enlarged cross-sectional view of the upper part of the shredder. It is a perspective view showing the state where the supply unit and the mounting unit were combined. It is a perspective view showing the state where a supply unit and a mounting unit were separated. It is the expanded sectional view of the separation part peripheral part, (a) is the figure seen from the side, (b) is the perspective view seen from diagonally backward, (c) is the perspective view seen from diagonally forward. is there. It is the perspective view in the state where the 2nd separation means was removed from a mounting unit, (a) is the figure seen from the upper part, and (b) is the figure seen from the lower part. It is sectional drawing of the part in which the 2nd isolation | separation means is arrange | positioned, (a) is sectional drawing in the position in which a 2nd protrusion part exists, (b) is 2nd contact | abutting rather than the position of (a). FIG. 4 is a cross-sectional view at a position shifted to a part side, and FIG. 4C is a cross-sectional view at a position where a first base-side bottom plate portion exists. It is a figure explaining operation of the 2nd separation means.

<Overview>
A shredder according to an aspect includes a shredding unit including a rotary blade for shredding, a placement unit for placing a sheet material, and a supply that abuts on the placed sheet material and supplies the sheet material to the shredding unit. And a separation unit for separating the uppermost sheet material supplied by the supply unit and the lowermost sheet material than the uppermost sheet material, between the shredding unit and the supply unit. Is provided.
In a shredder according to another aspect, the separating means has a contact portion that makes contact with a supply-side tip of the supplied sheet material and curves the sheet material. Thereby, the sheet material is easily separated.
In a shredder according to another aspect, the contact portion is provided so as to be movable with respect to the placing surface, and the separation unit biases the contact portion toward a side opposite to a sheet material supply direction. With body. Thereby, the sheet material is easily separated.

In a shredder according to another aspect, the separation unit includes a base portion extending along the mounting surface of the mounting unit, and a cover portion movably supporting the base portion in a supply direction. The portion extends from a supply-side tip portion of the base portion, and the biasing body is disposed between the base portion or a member that forms the placement surface or the cover portion. Thereby, the separating means can be easily configured.
In a shredder according to another aspect, the separation unit has a resistance portion in the contact portion that gives resistance to movement of the sheet material to the supply side. Thereby, the sheet material is easily separated.
In a shredder according to another aspect, the sheet material has an input port for mounting the sheet material on the mounting surface, and a lid body that freely opens and closes the input port is provided. The upstream side of the mounting surface. This makes it possible to reduce the size of the device while securing a wide mounting surface.
In a shredder according to another aspect, the lid has a lid input port for inputting a sheet material to the shredding unit in a closed state. Thereby, the usability of the shredder is improved.

<First embodiment>
1. Structure The structure will be described with reference to FIG.
The shredder X includes at least a shredding unit 1, a supply unit 2, and a placement unit 3. The shredder X further includes a drive unit 4 for driving the shredding unit 1 and the supply unit 2, and a waste storage box 5. These units 1 to 4 are provided in the housing 6, and the waste storage box 5 is arranged in the housing 6. The front wall of the housing 6 is constituted by the front wall 51 of the waste storage box 5.
The shredder X has an input port 61 for inputting a sheet material into the mounting unit 3, and the sheet material input from the input port 61 and mounted on the mounting unit 3 is shredded by the supply unit 2. 1, and the supplied sheet material is cut into pieces by the shredding unit 1 and then stored in the waste storage box 5. The waste storage box 5 is also provided so as to be freely taken in and out from the front side of the housing 6.
The shredder X includes a separation unit 7 (see FIG. 4) for separating the uppermost sheet material and the lower sheet material when a plurality of sheet materials are supplied by the supply unit 2. 1 and the supply unit 2. Here, “topmost” refers to the position where the sheet is supplied first in a plurality of sheet materials, and “lower” refers to the position where the second or subsequent sheet is supplied in a plurality of sheet materials.

In the present specification, the moving path of the sheet material from the input port 61 to the placement unit 3 is set as the loading path, and the sheet material is moved by the driving of the supply unit 2 and supplied to the shredding unit 1. The travel route up to this point is the supply route. The direction in which the sheet material moves in the supply path is defined as the supply direction, and the direction (direction) toward which the sheet material is directed is defined as the downstream side. In the sheet material, the leading end in the moving direction, that is, the portion that is first cut by the shredding unit 1 is referred to as a supply-side leading end.
The direction is based on the state toward the shredder X. In the front-rear direction of the shredder X, the side having the facing surface is the front side.

2. Each component will be described below.
(1) Housing The housing 6 has a rectangular parallelepiped shape as shown in FIG. The housing 6 has a housing main body 62 having a front wall open except for an upper part and having an insertion port 61 on an upper wall, and a lid provided at a rear upper portion of the housing main body 62 and freely opening and closing the insertion port 61. And a body 63. The front opening of the housing 6 is closed by the front wall 51 of the waste storage box 5.

As shown in FIG. 2, the housing main body 62 has a lower main body 64 having an opening in the front wall and opening upward, and a receiving main body 65 fitted in the upper opening so as to close the upper opening of the lower main body 64. And an upper body 66 that covers the receiving body 65 from above.
The shredding unit 1, the supply unit 2, the placement unit 3, and the drive unit 4 are attached to the receiving body 65. Note that the receiving body 65 does not appear outside the housing 6.
The upper body 66 has a box shape whose lower side is open. The input port 61 is provided on the rear side of the upper wall 661 of the upper main body 66. A support member 68 that rotatably supports a shaft portion (not shown) of the lid 63 is provided around the connection portion between the upper wall 661 and the rear wall 662 and on both sides in the left-right direction.

  As shown in FIG. 1A, the lid 63 is provided with a slit-like lid insertion port 631 for supplying a sheet material to the supply unit 2 when in a closed state. As shown in FIG. 1B, the lid 63 has a support portion 632 that supports the sheet material continuously to the mounting unit 3 when in the open state. The support portion 632 is formed by a rib, and the upper end surface 632a of the rib substantially coincides with an extension of the mounting surface 311 of the mounting unit 3 when the lid 63 is open (see FIG. 4). A plurality of ribs are provided at intervals in the left-right direction. Thereby, even if the size of the shredder X in the front-rear direction is reduced, the sheet material is stably placed.

(2) Shredding Unit The shredding unit 1 is attached to the receiving main body 65 at a position above the waste storage box 5 as shown in FIG. Specifically, it is provided above substantially the center of the waste storage box 5 in the front-rear direction.
As shown in FIG. 4, the shredding unit 1 includes a frame 11 attached to the receiving body 65, a pair of rotating shafts 12 and 13 rotatably supported in parallel with the frame 11, and each of the rotating shafts 12 and 13. 13 is provided with rotary blades 14, 15 arranged at intervals in the axial direction. The rotation shafts 12 and 13 are driven by the drive unit 4.
The frame 11 is attached to a pair of support plates 81 provided on the receiving main body 65, as shown in FIGS. The frame 11 has openings above and below the rotary blades 14 and 15. Thereby, the sheet material is supplied to the rotary blades 14 and 15 from above, and the shredded sheet pieces are pushed downward and fall. The upper opening of the frame 11 is a downstream end of the sheet material supply path 25. Note that the pair of rotating shafts 12 and 13 extend in the left-right direction, and are configured to be capable of normal rotation and reverse rotation.

(3) Supply Unit The supply unit 2 is disposed above the shredding unit 1 as shown in FIG. The supply unit 2 is mounted on the frame 11 of the shredding unit 1 and fixed to a pair of support plates 81.

The supply unit 2 includes a supply unit 21 that supplies the sheet material placed on the placement unit 3 to the shredding unit 1.
As illustrated in FIG. 4, the supply unit 21 includes a supply roller 211 that rotates in contact with the uppermost sheet material, and a rotation shaft 213 that drives the supply roller 211 to rotate. The supply unit 21 is attached to the rotation shaft 213 in a free state and rotatably supports the supply roller 211. The supply unit 215 is rotatably supported by the supply cover 215 and rotates the rotation shaft 213. The gear 217 is provided with a gear 217 for transmitting the supply cover 215 to a sheet material side by contacting an upper wall 661 of the upper main body 66. The supply unit 21 here includes a plurality (two) of supply rollers 211 spaced apart in the left-right direction as shown in FIG. The surface of the supply roller 211 is made of a rubber material having a large coefficient of friction with the sheet material.

As shown in FIG. 3, the supply unit 2 includes a supply base 23 that rotatably supports the rotation shaft 213.
The supply base 23 is formed on an upper supply wall portion 231 (see FIG. 4) constituting an upper wall of the supply path 25 for supplying the sheet material to the shredding unit 1, and on the left and right sides of the upper supply wall portion 231. And a shaft support portion 233 that supports the rotation shaft 213.
The supply base 23 has an opening (through-hole) 235 for the supply roller 211 in the upper supply wall 231 as shown in FIG. A gear 27, which is an example of drive transmission means, is attached to the rotation shaft 213. The gear 27 is connected to the drive unit 4 via another gear.

  As shown in FIG. 4, a rear portion 237 of the supply base 23 (upper supply wall portion 231) faces the mounting surface 311 of the mounting unit 3 and is inclined upward and rearward. Note that the rear end of the rear portion 237 is connected to the upper wall 661 of the upper main body 66 and forms the input port 61.

(4) Mounting Unit The mounting unit 3 is disposed on the rear upper portion of the shredding unit 1 as shown in FIG. Thus, the supply path 25 to the sheet material shredding unit 1 can be shortened. The mounting unit 3 is fixed to a pair of support plates 81 in a state where the mounting unit 3 is aligned with the supply unit 2 as shown in FIG.
The placing unit 3 places one or more sheet materials to be supplied to the shredding unit 1 side. As shown in FIG. 6, the mounting unit 3 supports the support wall 31 that supports one or more sheet materials from below, and the support wall 31 from the lower end (downstream end in the supply direction) of the support wall 31. Wall section 35 inclined at an angle of 100 [°] or more, an arc wall section 35 whose section extends in an arc from the downstream end in the supply direction of the inclined wall section 33, a support wall section 31 and an inclined wall section 33. A pair of upright wall portions 37 is provided upright from both left and right ends of the arc wall portion 35.

The support wall portion 31 is inclined such that when the sheet material is placed, the supply-side tip of the sheet material is downward. Thereby, the sheet material can be guided to the downstream side in the supply direction of the support wall 31 by its own weight. The upper surface of the support wall 31 is a placement surface (contact with the sheet material) 311 on which the sheet material is placed. The support wall portion 31 has a concave portion 313 at a position corresponding to the supply roller 211.
As shown in FIG. 4, the placing surface 311 forms a substantially straight line with the upper end surface 632 a of the supporting portion (rib) 632 of the lid 63, and the placing surface of the sheet material is formed by the supporting portion 632 of the lid 63. Constitute. For this reason, the mounting surface of the support wall portion 31 is also referred to as a downstream mounting portion or a downstream mounting surface, and the support portion 632 of the lid 63 is also referred to as an upstream mounting portion 632.

The inclined wall portion 33 may have an obtuse angle with respect to the mounting surface 311 in the thickness direction of the sheet material, for example, an angle in the range of 100 ° to 135 ° (inclination with respect to the thickness direction). Direction). Accordingly, the sheet material placed on the placement surface 311 can move downward, and the sheet material can be smoothly supplied to the shredding unit 1 side. Here, the inclined wall section 33 is inclined at an angle of about 110 [°] with respect to the mounting surface 311.
The arc wall portion 35 is extended in an upwardly convex arc shape (about 1/4 of a circle) such that the position of the extension end in the vertical direction is substantially the same height as the lower end of the support wall portion 31. I have.
The standing wall portion 37 regulates the movement of the sheet material placed on the placement surface 311 and the supplied sheet material in the left-right direction. Note that fixing portions for fixing the mounting unit 3 to the support plate 81 are provided outside the left and right directions of the standing wall portion 37 and on the upper end side of the support wall portion 31.

As shown in FIG. 8B, the mounting unit 3 has a mounting-side housing portion 38 in which a housing portion for housing the V-shaped body 730 and the cover body 735 are formed.
As shown in FIG. 8 (b) and FIG. 9 (b), the mounting side receiving section 38 has a U-shaped cross section that opens downward, and as shown in FIG. 8 (b). And a groove portion 381 that is long in the supply direction.
As shown in FIG. 9B, the groove portion 381 is composed of a pair of long side plate regions 383 projecting rearward from the support wall portion 31 and a concave region 385 formed in the support wall portion 31.
As shown in FIG. 9A, the long side plate region 383 has a step 387 in which the inner surface facing the lower side expands downward, and the base portion 733 of the V-shaped body 730 fits in the lower groove portion. Combine. In the fitted state, the base portion 733 of the V-shaped body 730 comes into contact with the flat portion of the step 387 (exactly, the overhang portion 779). As shown in FIG. 8B, a through hole 33a is formed in a portion of the groove portion 381 where the inclined wall portion 33 is present and at a portion corresponding to the bottom of the groove.

  As shown in FIGS. 9A and 9C, the mounting unit 3 has a mounting unit side mounting portion for mounting the second separating unit 73. As shown in FIG. 8B, the mounting unit side mounting portion is extended to the back side by an engaging piece 39 that engages with the end surface (flat portion) of the extended piece 783 of the cover body 735. It is configured. Here, there are four engagement pieces 39, which are provided on the support wall 31. Specifically, the engagement pieces 39 are formed on four sides of the groove portion 381 in the short direction and at intervals in the supply direction. As shown in FIGS. 9A and 9C, the engagement piece 39 is provided along the outer surface of the base portion side plate portion 784 of the cover body 735 fitted (externally fitted) to the long side plate region 383. Have been.

(5) Separation Unit The separation unit 7 is provided below the supply unit 21 as shown in FIGS. As shown in FIG. 6, the separating unit 7 is provided on the support wall 31 or the inclined wall 33 of the mounting unit 3.
The separating means 7 here includes a first separating means 71 and a second separating means 73. Note that the second separating unit 73 corresponds to an example of the separating unit of the present invention.
The first separating unit 71 has a first contact portion 711 that contacts at least the supply-side tip of the supplied sheet material. The second separating unit 73 has a second contact portion 731 that contacts at least the supply-side tip of the supplied sheet material. The first contact portion 711 and the second contact portion 731 may contact the leading end on the supply side of the sheet material placed on the placement unit 3 in some cases. The phenomenon in which the placed sheet material does not contact the first contact portion 711 and the second contact portion 731 is caused by the fact that the sheet material placed on the placing unit 3 has a lower end (there is a contact portion). Position).

A load acts on the sheet material being supplied by the supply unit 21 so as to move to the downstream side in the supply direction. When the supply-side end of the sheet material contacts the first contact unit 711, the sheet material is curved. As a result, the uppermost sheet material and the lower sheet material can be easily separated. In addition, the reason why a plurality of sheet materials move overlappingly by the supply unit 21 is due to friction between the overlapped sheet materials.
If the areas of the first contact portion 711 and the second contact portion 731 that contact the leading end of the sheet material on the supply side are small, the surface pressure increases, so that the curvature of the sheet material increases. It becomes easy to be supplied in an overlapping state. Conversely, if the area of the first contact portion 711 and the second contact portion 731 is large, the surface pressure is reduced and the curvature of the sheet material is reduced. However, it is difficult to supply a plurality of sheet materials in an overlapping state. Become. Therefore, it is preferable that the area of the first contact portion 711 and the area of the second contact portion 731 be in a range in which both effects of the above example can be obtained.

  The first contact portion 711 and the second contact portion 731 may have an obtuse angle with respect to the mounting surface (downstream surface located downstream) 311 as shown in FIG. It is inclined at an angle A within the range of [°] to 135 [°]. Here, the angle is 110 [°]. When the angle A is an acute angle, it becomes difficult to supply the sheet material. FIG. 7 shows only the roll portion of the supply roller 211.

(5-1) First Separating Means As shown in FIG. 6, the first separating means 71 is plural (for example, nine) at intervals in the left-right direction. The first separating unit 71 has the first contact portion 711 as described above. Here, the first separating means 71 is provided on the inclined wall 33 of the mounting unit 3. The first separating unit 71 is provided so as to protrude from the inclined wall 33 to the mounting surface 311 side. Thus, the friction between the first contact portion 711 and the leading end of the sheet material on the supply side can be reduced, and the sheet material can be smoothly supplied to the shredding unit 1.
Here, the first separating means 71 is provided integrally with the inclined wall portion 33 of the mounting unit 3. That is, the first separating unit 71 is formed as an integrally molded product with the mounting unit 3.
The number and spacing of the first separation means 71 are configured such that they are placed on the placement surface 311 and abut at two or more locations when the sheet material supply-side tip reaches the first separation means 71. .

(5-2) Second Separating Means As shown in FIG. 6, the second separating means 73 is provided substantially at the center in the left-right direction of the support wall 31 (mounting surface 31a). That is, there is one second separating unit 73.
The second separating unit 73 includes the above-described second contact portion 731 movably with respect to the mounting surface 311. As shown in FIGS. 7A and 8, the second separating unit 73 extends from the second contact portion 731 and the lower end (the upstream end of the supply passage 25) of the second contact portion 731. The base unit 733 is integrally provided, and the base unit 733 is provided movably with respect to the support wall unit 31. Note that the angle between the second contact portion 731 and the base portion 733 is the same or substantially the same as the angle A described above.

In other words, as shown in FIG. 8, the second separating unit 73 includes the second contact portion 731 and the base portion 733 in a “V” shape, an “L” shape, or a shape similar thereto. The base portion 733 is slidably provided on the back side of the support wall portion 31 so that the second contact portion 731 is exposed to the supply passage 25 from the through hole 33a of the inclined wall portion 33. In addition, the thing which has the 2nd contact part 731 and the base part 733 in a "V" shape is called "V-shaped body", and the code | symbol "730" is used.
As described above, since the base portion 733 is arranged on the back side of the support wall portion 31, the second contact portion is opposite to the support wall portion 31 with respect to the second contact portion 731 as shown in FIG. The shredding unit 1 can be arranged close to the downstream side in the supply direction of the portion 731. Also, by disposing the base portion 733 on the back side of the support wall portion 31 so that the second contact portion 731 extends from the through hole of the inclined wall portion 33, the back side of the inclined wall portion 33 (the shredding unit 1 is The existing structure can be simplified.

  In particular, after the inclined wall portion 33 extends forward and upward from the downstream end of the support wall portion 31 of the mounting unit 3 in the supply direction, the arcuate wall portion 35 that constitutes the supply path 25 is circularly directed forward and downward. It extends in an arc shape. The second abutting portion 731 and the cover body 735 of the second separating means 73 are formed in the support wall portion 31 at the back side of the inclined wall portion 33 bulging upward from the downstream end side in the supply direction and the arc wall portion. , It is not necessary to form a storage space for the second separating means 73.

As shown in the enlarged portion of FIG. 6, the second separating unit 73 has a resistance portion 731 a that provides resistance to the movement of the sheet material to the downstream side of the supply path 25 in the second contact portion 731. Here, the resistance portion 731a is formed by a recess formed along the supply path direction. A plurality of recesses are formed at intervals along the supply path direction. The intervals between the plurality of recesses are equal.
The dent extends in the left-right direction and is formed in a groove shape. The sizes (depths) of the depressions are all the same. The depth of the recess is 0.5 [mm] or less. The depth of the depression is the difference between the most concave part and the highest part adjacent to the most concave part in the supply path direction. Here, the resistance portion 731a is based on the high portion of the contact portion, and becomes convex when the low portion of the contact portion is referenced.
The shapes of the recesses are all the same, and here are a plurality of wavy (Sin curve) shapes. The pitch of the recess is, for example, 1.0 [mm]. The pitch is the distance between the most recessed portions of two adjacent recesses in the supply direction.

As shown in FIG. 8A, the second contact portion 731 passes through the flat plate portion 751 and the through hole 33a of the inclined wall portion 33 from the surface of the flat plate portion 751 (the surface on the supply path 25 side). A projection 753 exposed to the supply passage 25; The resistance portion 731a is provided at the tip (front surface) of the ridge portion 753.
The flat plate portion 751 has a rectangular shape long in the supply direction, and is configured to be larger than the through hole 33 a of the inclined wall portion 33.
The protruding ridge portion 753 is provided substantially at the center in the lateral direction of the flat plate portion 751 along the longitudinal direction. The recess of the resistance portion 731a extends in the short direction of the flat plate portion 751.
The second contact portion 731 has a plurality of (for example, two) convex portions 755 spaced apart in the longitudinal direction on the back surface of the flat plate portion 751. This can prevent the flat plate portion 751 from being fitted between the pair of side plate portions 781 of the cover body 735.

As shown in FIG. 8, the base portion 733 projects rearward from a flat plate portion 761 and an end of the back surface (the surface opposite to the support wall portion 31) of the flat plate portion 761 opposite to the second contact portion 731. It has a first protruding portion 763 and a second protruding portion 765 protruding from the first protruding portion 763 toward the second contact portion 731 in a truncated cone shape.
The flat plate portion 761 has a rectangular shape long in the supply direction, and has a downstream end connected to the second contact portion 731. The second protruding portion 765 extends in the longitudinal direction of the flat plate portion 761 at an interval from the flat plate portion 761. As shown in FIG. 7, one end of a biasing body 736 is fitted into the second protruding portion 765. The first protruding portion 763 and the second protruding portion 765 constitute the above-described protruding portion 737.

  The base portion 733 has a back overhang portion 767 that protrudes to the back side at a portion from the middle position in the longitudinal direction to the second protruding portion 765 on the back surface of the flat plate portion 761. The overhang portion 767 is on both sides in the short direction of the flat plate portion 761 and is fitted to the step 784a of the cover body 735 as shown in FIG. Thereby, the backlash in the direction perpendicular to the supply direction of the V-shaped body 730 can be restricted.

As shown in FIG. 8A, the base portion 733 has a ridge portion 768 that extends on the surface of the flat plate portion 761 and substantially the center in the short direction in the longitudinal direction. The ridge portion 768 and the ridge portion 753 of the second contact portion 731 also function as ribs for reinforcing the flat plate portions 751 and 761.
The base portion 733 has a projecting portion 779 projecting to the front side from both end portions in the lateral direction on the surface of the flat plate portion 761. The overhang portion 779 contacts the step 387 of the groove portion 381 of the mounting unit 3 as shown in FIG. Thereby, the contact surface between the V-shaped body 730 and the groove portion 381 can be reduced, and the movement of the V-shaped body 730 is smooth.

The second separating unit 73 includes a cover body 735 that covers the V-shaped body 730 from the back side in a movable state. The cover body 735 movably covers (supports) the V-shaped body 730 by having a housing portion in which the dimension of the base portion 733 in the extending direction is larger than the dimension of the V-shaped body 730.
The second separating unit 73 includes an urging body 736 that urges the second contact portion 731 in a direction opposite to the sheet material supply direction. The biasing body 736 uses a compression spring, and is disposed between the inner surface of the cover body 735 and a protruding portion 737 that protrudes rearward from the extending end of the base portion 733.
The urging member 736 can reduce a situation in which a plurality of sheet materials are simultaneously supplied to the shredding unit 1 (the reason will be described later).

The cover body 735 has a downstream covering portion 735a and an upstream covering portion 735b, as shown in FIG. 7B. The downstream-side covering portion 735a covers the second contact portion 731 of the V-shaped body 730 and substantially half of the second contact portion 731 in the extending direction of the base portion 733. The upstream-side covering portion 735b covers substantially half of the opposite side of the second contact portion 731 in the extending direction of the base portion 733. The upstream covering portion 735b projects downward, and the urging member 736 is accommodated in the projecting portion.
Thereby, the second contact portion 731 side of the second separating means 73 can be reduced in size, and the second contact portion 731 can be arranged in a narrow space between the mounting unit 3 and the shredding unit 1. In addition, since the protruding portion 737 exists on the base portion 733 on the side opposite to the support wall portion 31 of the mounting unit 3, it can be easily implemented.

  As shown in FIG. 8, the cover body 735 includes a pair of side plate portions 781 arranged at intervals in a direction (horizontal direction and also a short direction of the V-shaped body 730) perpendicular to the supply direction. And a bottom plate 782 connecting the lower ends of the pair of side plate portions 781, and a V-shaped body 730 and a biasing body 736 are provided in an internal space defined by the placement-side accommodation section 38 of the placement unit 3. Will be accommodated.

The opening-side end of the cover body 735, that is, the upper end of the side plate portion 781 is configured to contact the support wall portion 31 and the inclined wall portion 32 as shown in FIG. 9B.
The cover body 735 has a cover body-side mounting portion for mounting the cover body 735 to the mounting unit 3. As shown in FIG. 8B, the cover-body-side mounting portion is configured by an extension piece 783 extending from the lower end of the base-side-side plate portion 784 located on the base portion 733 side. That is, the engagement piece 39 serving as the mounting unit side mounting portion engages with the flat portion at the lower end of the extension piece 783 serving as the cover body mounting portion. The lower end of the engagement piece 39 is flat in the horizontal direction.

  The opposing surfaces (inner surfaces) of the pair of base portion side side plate portions 784 are formed as upwardly extending steps 784a as shown in FIG. As shown in FIG. 9B, when the cover body 735 is mounted on the mounting unit 3, the step 784a comes into contact with the back surface (end surface) of the long side plate area 383 of the mounting side storage portion 38 or Be close.

As shown in FIG. 8B, the bottom plate portion 782 has a contact portion-side bottom plate portion 785 on the second contact portion 731 side of the V-shaped body 730 and a base portion-side bottom plate portion 786 on the base portion 733 side. There is. The base portion side bottom plate portion 786 has a first base portion side bottom plate portion 787 near the contact portion side bottom plate portion 785 and a second base portion side bottom plate portion 788 separated from the first base portion side bottom plate portion 787. The second base portion side bottom plate portion 788 bulges below the first base portion side bottom plate portion 787.
The first base portion side bottom plate portion 787 has a flat plate shape, and the second base portion side bottom plate portion 788 has a circular arc shape in cross section. In the cover body 735, the urging body 736 is accommodated in the space on the second base part side bottom plate part 788 side as shown in FIG. 7, and the upstream side covering part 735b is configured.
As shown in FIG. 8, the cover body 735 has a connecting plate portion 789 that connects the upstream ends of the pair of side plate portions 781. Thus, even if the V-shaped body 730 is urged by the urging body 736, it is housed in the cover body 735.

  As shown in FIG. 4, the drive unit 4 is arranged on the rear side (lower side) of the mounting unit 3, and a space larger than the space between the supply path 25 and the shredding unit 1 exists. Utilizing this space, the second separating means 73 is arranged so that the upstream covering portion 735b of the cover body 735 that accommodates the urging member 736 is located on the back side of the mounting unit 3 (support wall portion 31). ing.

The second separating unit 73 includes a second contact part 731 between two first separating units 71 adjacent in the left-right direction. The second contact portion 731 is provided so as to approach or contact between the pair of first separating means 71. Thereby, the posture of the second contact portion 731 is maintained.
The second separating unit 73 is disposed between a pair of supply rollers 211 constituting the supply unit 21 of the supply unit 2. Accordingly, when the sheet material is supplied, the second separating unit 73 is located around a portion where the load acts on the sheet material most, and it is possible to prevent a plurality of sheet materials from being supplied in an overlapping manner.

(6) Drive Unit As shown in FIG. 4, the drive unit 4 has a motor 41 attached to one of a pair of support plates 81 provided on the receiving body 65 of the housing 6, and the drive of the motor 41 is shredded. A gear 43 (see FIG. 3) for transmitting to the unit 1 and the supply unit 2 is provided.

3. Operation of Second Separation Unit The operation of the second separation unit 73 will be described with reference to FIG.
In FIG. 10, a black circle is attached below a portion of the sheet material 92 shown in FIG. 10A where the supply-side tip 92 a is in contact, and this black circle prevents the movement of the sheet materials 91 and 92 in the supply direction. It is described as a reference for movement for simplicity.
In FIG. 10, there are three types of arrows, a dashed-dotted arrow A is driven so that the sheet body always moves in that direction, and a thick-lined arrow is generated due to the phenomenon of a thin-lined arrow. It is a phenomenon. As an example, in FIG. 10B, first, the sheet materials 91 and 92 move in the direction of arrow C, and as a result, the second contact portion 731 moves in the direction of arrow D.
(1) When lower sheet material remains (normal)
When a plurality of sheet materials 91 and 92 are placed on the placement unit 3 and supplied to the shredding unit 1, as shown in FIG. It comes into direct contact and moves to the downstream side (indicated by arrow A) of the supply path 25 by the supply roller 211.
The lower sheet material 92 of the uppermost sheet material 91 does not come into contact with the supply roller 211, and remains at that position although not shown in FIG. That is, only the uppermost sheet material 91 is supplied to the shredding unit 1.

(2) When the lower sheet material slightly moves When the friction or the electrostatic force (hereinafter, sometimes simply referred to as “friction force”) between the uppermost sheet material 91 and the lower sheet material 92 is large, With the movement of the upper sheet material 91, as shown in FIG. 10A, the lower sheet material 92 also moves downstream (indicated by arrow A) of the supply path 25.
Thereby, the supply-side leading ends 91a and 92a of the sheet materials 91 and 92 abut on the resistance portion 731a of the second abutting portion 731.
At this time, the uppermost sheet material 91 tends to move downstream by the supply roller 211. On the other hand, the lower sheet material 92 tends to move downstream due to a frictional force with the uppermost sheet material 91 or the like, but the force of the movement is weak, and cannot move over the resistance portion 731a. Stay in portion 731a.
Thereby, the uppermost sheet material 91 and the lower sheet material 92 are separated, and only the uppermost sheet material 91 is supplied to the shredding unit 1.

(3) When lower sheet moves (exception)
As described in the above (2), when the frictional force or the like between the uppermost sheet material 91 and the lowermost sheet material 92 is large, as shown in FIG. As described above, the lower sheet material 92 also moves downstream (indicated by an arrow A) of the supply path 25 (this movement is referred to as “sheet material movement operation”), and the supply-side leading ends of the sheet materials 91 and 92 are moved. The contact portions 91a and 92a contact the resistance portion 731a of the second contact portion 731 (this contact is referred to as "contact operation").
At this time, if the uppermost sheet material 91 and the lower sheet material 92 are not separated, the second contact portion 731 is moved by the load to move the sheet materials 91 and 92 to the downstream side in the supply direction. (Indicated by arrow B in FIG. 10A) (this movement is referred to as “contact portion moving operation”).

Due to the movement of the second contact portion 731, there is no restriction on the movement of the sheet materials 91, 92, and the driving load of the supply roller 211 is applied to the uppermost sheet material 91, and the lower sheet material 92 is subjected to friction. Loads such as force are acting.
As a result, the sheet materials 91 and 92 have their supply-side tips 91a and 92a slipped out of the resistance portion 731a, and as shown by the arrow C in FIG. 10B, along the second contact portion 731 to the downstream side. (Moving out of the resistance portion is referred to as “moving operation after removal”).
At the same time, the load on the sheet materials 91 and 92 that presses the second contact portion 731 to the downstream side of the supply path 25 temporarily disappears, and as shown by the arrow D in FIG. The part 731 is moved to the upstream side of the supply path 25 by the urging body 736 (return). This movement is referred to as “contact portion return operation”.

  Thereafter, when the frictional force or the like of the sheet material 92 is large, the lower sheet material 92 moves to the downstream side together with the uppermost sheet material 91. The pre-separation process up to the part moving operation, the moving operation after removal, and the contact part returning operation is repeated once or plural times.

When the separation process is repeated a plurality of times, the lower-side sheet material 92 has its supply-side leading end 92a abutting the second contact portion 731 several times, and is prevented from moving together with the uppermost sheet material 91, and The sheet material 91 is easily separated from the lower sheet material 92.
As a result, when the uppermost sheet material 91 and the lower sheet material 92 are separated, only the uppermost sheet material 91 moves to the shredding unit 1 by driving the supply roller 211.

If the uppermost sheet material 91 and the lower sheet material 92 are not separated even if the above separation process is repeated a plurality of times, the supply-side tip 91a of the uppermost sheet material 91 eventually becomes the second contact portion 731. Exceeds.
This state is (c) in FIG. 10. As shown in FIG. 10, the lower sheet material 92 moves in the direction of the arrow A with the movement of the uppermost sheet material 91, and eventually, as shown in FIG. 10. As shown in (d), only the supply-side tip 92a of the lower sheet material 92 enters the resistance portion 731a.
At this time, the uppermost sheet material 91 has its leading end on the supply side exceeding the second contact portion 731 and its movement is not hindered. As a result, the speed difference between the uppermost sheet material 91 and the lower sheet material 92 increases, and the movement of the sheet material 92 is hindered by the resistance portion 731a. The material 92 is easily separated.
Needless to say, when separated, only the uppermost sheet material 91 is supplied to the shredding unit 1.

(4) When moving in an overlapping state (when abnormal)
Since the separation unit 7 is provided, only the uppermost sheet material 91 is supplied to the shredding unit 1 as described in (1) to (3) above.
However, even if the above-described separation process is repeated a plurality of times, the supply-side leading end 92a of the lower sheet material 92 may rarely exceed the resistance portion 731a without separation.
In this case, a plurality of sheets are supplied to the shredding unit 1, but the number of sheets (overlapping number) supplied to the shredding unit 1 is reduced by repeating the above-described separation process a plurality of times. In addition, the driving force of the driving unit 4 can be reduced.

The first to third embodiments have been described above. However, the present invention is not limited to these embodiments, and may be, for example, the following modifications. Further, a combination of the embodiment, the modified examples, and the modified examples may be used.
In addition, examples that are not described in the embodiments and modified examples and design changes that do not depart from the gist are also included in the present invention.

<Modification>
1. Separating Means In the embodiment, a plurality of first separating means 71 and one second separating means 73 are provided. However, it is sufficient that the uppermost sheet material and the lower sheet material in the overlapping state can be separated, and one first separating unit 71 and one second separating unit 73 may be provided, or a plurality of first separating units may be provided. Only the means 71 may be provided, or only one second separating means may be provided.
The upper surfaces of the first contact portion 711 and the second contact portion 731 (the surface on the side in contact with the sheet material) are linear (accurately recessed) when viewed from the left and right directions. It may have a convex curve or a downward convex curve.

(1) First Separating Means There are a plurality of first separating means 71 in the left-right direction, and the total length in the left-right direction is 30 [the length in the left-right direction of the inclined wall portion 33 of the mounting unit 3]. %] To 40 [%]. Thereby, the friction with the sheet material is optimized, the sheet material can be supplied smoothly, and the overlapped sheet material can be separated.
The plurality of first separating units 71 have the same length in the left-right direction except for two first separating units 71 adjacent to the second separating unit 73, but may be different.

The shape of the first abutting portion 711 has a constant (unchanged) rectangular shape along the supply direction when viewed from a direction orthogonal to the supply path. May be trapezoidal or triangular in which the length in the horizontal direction is small, or trapezoidal or triangular in which the length in the left-right direction is large.
The first separating means 71 does not have a resistance portion in the first contact portion 711, but may have a resistance portion. In this case, the configuration may be the same as that of the resistance portion 731a of the second separating unit 73, or may be a different configuration. However, when the second separating means 73 is provided, it is preferable to provide a resistance portion as long as the effect of the movement of the second contact portion 731 of the second separating means 73 is not hindered.

(2) Second Separating Means One second separating means 73 is provided at the center in the left-right direction, and the length of the second contact part 731 in the left-right direction is the same as that of the inclined wall part 33 of the mounting unit 3 in the left-right direction. The ratio may be in the range of 2 [%] to 6 [%] with respect to the length. In particular, when the second contact portion 731 is moved by the urging member 736, the length of the second contact portion 731 in the left-right direction may be within the range of 2 mm to 6 mm. Thereby, the movement of the second contact portion 731 is quickened, and the overlapped sheet material can be separated.
The shape of the second contact portion 731 is a fixed (unchanged) rectangular shape along the supply direction when viewed from a direction orthogonal to the supply path. May be trapezoidal or triangular in which the length in the horizontal direction is small, or trapezoidal or triangular in which the length in the left-right direction is large.

The shape of the resistance portion 731a of the second contact portion 731 may be the same or different along the supply path direction. For example, when viewed from the left and right directions, the (surface) shape of the resistance portion may be a triangular wave shape, or a shape in which the corner portion of a rectangular wave is rounded.
Although the resistance portion 731a is configured by a recess, it may be configured by, for example, a protrusion. In this case, the ridge may extend over the entire length in the left-right direction, may be formed only at the center in the left-right direction, or may have a square shape when viewed from the protruding direction. Such a thing may be used.

Although the pitch of the dent was constant along the direction of the supply path, the pitch of the dent or projection may be increased or decreased as the position progresses downstream of the supply path. Further, the pitch of the dents or protrusions may be increased or decreased only in the middle of the supply direction.
Although the depth of the dent was constant along the supply path direction, the depth of the dent or the height of the protrusion may be increased or decreased toward the downstream side of the supply path. Further, the depth of the depression or the height of the projection may be increased or decreased only in the middle of the supply direction.
Although the resistance portion is provided integrally with the second contact portion, for example, a member different from the member constituting the second contact portion may be provided on the second contact portion. The other member is, for example, a rubber material having a high friction coefficient.

Although the base portion 733 is disposed on the back side of the support wall portion 31 of the mounting unit 3, for example, a groove may be provided on the surface of the support wall portion, and the base portion may be movably accommodated in the groove. Good. The base portion 733 is provided on the support wall portion 31 side, but may be provided on the opposite side to the support wall portion.
The second separating means may include a contact body and a cover body that covers the contact body from the back side, and an urging body may be disposed between the contact body and the cover body. In this case, the base part becomes unnecessary. The second separating means includes a contact body accommodated in the groove of the mounting unit, and a cover body that covers the contact body from the front side, and the urging body contacts the bottom of the groove of the mounting unit. May be placed between the body. Also in this case, the base part is unnecessary. As described above, the second separating means may include the second contact portion movably supported and the urging member for urging the second contact portion upstream in the supply direction. Is not particularly limited.
The urging body is configured such that a compressive load acts on the urging body by moving the base portion 733 to the downstream side of the supply path, but a tensile load acts by moving the urging body to the downstream side. It may be a biasing body (tensile spring). In this case, the urging member is arranged on the upstream side of the base portion, and one end of the urging member is attached to the base portion, and the other end of the urging member is attached to the mounting unit side (member constituting the unit). it can.

X Shredder 1 Shredding unit 2 Supply unit 3 Placement unit 4 Drive unit 7 Separation means

Claims (7)

A shredding unit having a rotary blade for shredding,
A mounting unit for mounting the sheet material,
A supply unit that is in contact with the placed sheet material and supplies the sheet to the shredding unit;
A shredding device is provided between the shredding unit and the supply unit, wherein separation means for separating the uppermost sheet material supplied by the supply unit and the sheet material lower than the uppermost sheet material is provided. . 2. The shredder according to claim 1, wherein the separation unit has a contact portion that makes contact with a supply-side end of the supplied sheet material and curves the sheet material. 3. The contact portion is provided movably with respect to the placing surface,
The shredder according to claim 2, wherein the separation unit includes an urging body that urges the contact portion in a direction opposite to a direction in which the sheet material is supplied. The separation unit includes a base portion extending along the mounting surface of the mounting unit, and a cover portion movably supporting the base portion in a supply direction.
The contact portion extends from a supply-side tip portion of the base portion,
4. The shredder according to claim 3, wherein the urging member is disposed between a member constituting the placement surface or the cover portion and the base portion. 5. The shredder according to any one of claims 2 to 4, wherein the separation unit includes a resistance portion in the contact portion, the resistance portion providing resistance to movement of the sheet material toward the supply side. Having an input port for mounting the sheet material on the mounting surface,
A lid that freely opens and closes the input port,
The shredder according to any one of claims 1 to 5, wherein the lid in an open state constitutes an upstream side of a mounting surface for the sheet material.
The shredder according to claim 6, wherein the lid has a lid input port for inputting a sheet material to the shredding unit in a closed state.

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