JP7438548B2 - shredder - Google Patents

Description

The present invention relates to a shredder for cutting various sheet materials such as paper and resin sheets.

2. Description of the Related Art Conventionally, a shredder with an autofeed function that automatically feeds sheet material to a cutting unit equipped with a rotary blade for cutting has been known (for example, Patent Document 1). The shredder according to Patent Document 1 includes a supply unit for supplying sheet material to a cutting unit. Further, the shredder according to Patent Document 1 is provided with a placing unit following the supply unit and a separating means for separating sheet materials stacked and placed on the placing unit. As a result, the sheet materials stacked on the stacking unit are automatically separated one by one and supplied to the supply unit.

JP2020-14988A

By the way, in a conventional shredder such as the one disclosed in Patent Document 1, when the sheet material is supplied to the supply unit, the supply unit, separation means, etc. may be clogged with the sheet material. In such a case, if you continue cutting, there is a risk that the rotary blade will be damaged or other parts will be overloaded, causing damage to the cutting unit. Therefore, when a jam occurs in the sheet material, measures are taken to remove the jammed sheet material by, for example, reversing the rotary blade of the cutting unit.

Further, if the jammed sheet material cannot be removed even by reversing the rotary blade, it is necessary to remove the jammed sheet material manually. In such cases, it is necessary to access the location where the sheet material is jammed. However, for example, if a jam of sheet material occurs in the cutting unit, there is a problem that there is little work space to access the location where the sheet material is jammed, and it becomes difficult to remove the jammed sheet material.

Therefore, an object of the present invention is to provide a shredder that can easily remove jammed sheet materials in order to solve this problem.

(1) A shredder provided to solve the above-mentioned problems includes a cutting section equipped with a rotary blade for cutting sheet material, a sheet material placing section for placing the sheet material, and a shredder for cutting the sheet material. a cutting unit having a sheet material supply section that supplies the sheet material placed on the placement section to the cutting section along a predetermined feeding direction, the sheet material supply section configured to It is characterized in that it can be opened and closed by rotating around a rotation axis perpendicular to the feeding direction, and in the open state, the supply port for the sheet material in the cutting section is exposed.

The above-mentioned shredder can be switched from a closed state to an open state by rotating the sheet material supply section around a rotation axis perpendicular to the feeding direction of the sheet material. Thereby, the sheet material supply port in the cutting section can be exposed. Therefore, the location where the sheet material is clogged can be easily accessed, and the removability of the jammed sheet material can be improved.

(2) In the above-described shredder of the present invention, the cutting unit has a supply route separate from the sheet material supply section and has a sheet material guide section that communicates with the supply port, and the sheet The material guide section has a first guide surface and a second guide surface facing each other, and supplies the sheet material directly along the first guide surface and the second guide surface without going through the sheet material supply section. It is preferable that the sheet material can be fed into the opening, and that a part of the outer wall forming the sheet material supply section forms at least a part of the second guide surface.

In the above-mentioned shredder, a part of the outer wall that constitutes the sheet material supply section constitutes at least a part of the second guide surface in the sheet material guide section. can be rotated. This makes it possible to easily access the jammed sheet material even if the sheet material is jammed near the cutting section. Therefore, the removability of the jammed sheet material can be improved.

(3) In the above-described shredder of the present invention, at least a portion of the upper surface of the sheet material supply section can face the first guide surface by rotating from a closed state to an open state, and the rotation shaft It is preferable that a first distance from the axial center to the second guide surface be larger than a second distance from the axial center to the upper surface.

According to this configuration, when the sheet material supply section is rotated from the closed state to the open state, the distance between the first guide surface and the second guide surface (also referred to as opening width) becomes larger than in the closed state. Specifically, since the turning radius (second distance) of the upper surface in the sheet material supply section is smaller than the turning radius (first distance) of the second guide surface when the sheet material supply section is in the closed state, the sheet material supply section When the sheet material supply section is placed in the open state, the upper surface of the sheet material supply section, which is arranged to face the first guide surface, moves away from the first guide surface. That is, the opening widths of the first guide surface and the second guide surface are expanded. Therefore, it becomes easy to access the supply port in the cutting section, and it is possible to improve the removability of the sheet material stuck in the vicinity of the supply port.

Here, the rotating shaft is integrally configured with a support frame that supports a sheet material supply section, and the support frame has an operation changeover switch on an outer surface thereof for switching the cutting unit from an operating state to a non-operating state. A part of the rotating shaft has a protrusion that protrudes from the outer surface of the support frame, and the protrusion is configured to rotate when the sheet material supply section is rotated from a closed state to an open state. Preferably, the operation selector switch can be switched to a non-operating state.

According to this configuration, the support frame and the protrusion of the rotating shaft can be integrally configured. Thereby, the number of parts can be reduced, and errors in the rotational operation of the sheet material supply section can be reduced. Therefore, the shredder can be operated stably. Furthermore, since the operation changeover switch can be placed outside the cutting section, the influence of cutting waste from the cutting section can be reduced. Thereby, the operation changeover switch can be stably operated, and the durability of the operation changeover switch can also be improved.

According to the present invention, it is possible to provide a shredder that allows easy removal of jammed sheet materials.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is an overall perspective view showing an embodiment of a shredder of the present invention, in which (a) shows a state seen from the right direction, and (b) shows a state seen from the left direction. FIG. 2 is an overall perspective view of the lid constituting the shredder of the present invention when it is in an open state. FIG. 1 is a longitudinal cross-sectional perspective view of the shredder of the present invention. It is a perspective view seen from the upper surface direction when a sheet material supply part which constitutes a shredder of the present invention is in an open state. FIG. 2 is a perspective view showing a state in which the cutting unit constituting the shredder of the present invention is separated from the main body. It is a bottom view of the cutting unit which constitutes the shredder of the present invention. FIG. 2 is a perspective view of a shredded waste storage section that constitutes the shredder of the present invention. FIG. 2 is a longitudinal cross-sectional view of a cutting unit that constitutes the shredder of the present invention. FIG. 2 is a perspective view showing a state in which a part of the outer frame is removed from the cutting unit constituting the shredder of the present invention. FIG. 2 is a perspective view of a sheet material placement section and a sheet material supply section that constitute the shredder of the present invention. FIG. 11 is a perspective view showing a state in which the sheet material supply section of FIG. 10 is removed from the sheet material placement section. FIG. 3 is a vertical cross-sectional view of a cutting unit constituting the shredder of the present invention, in which (a) shows the sheet material supply section in a closed state, and (b) shows the sheet material supply section in an open state. This is what I did. FIG. 2 is a plan view of a cutting unit that constitutes the shredder of the present invention. FIG. 7 is a plan view of a cutting unit according to modification example 1 of the present invention.

An embodiment of the shredder 1 according to the present invention will be described in detail with reference to FIGS. 1 to 13. As shown in FIGS. 1 to 5, the shredder 1 includes a main body portion 50 forming the main body of the shredder 1, a cutting unit 10 for cutting sheet materials, and a housing for storing cutting waste generated by cutting the sheet materials. It is equipped with a cutting waste storage section 70 and the like. In the following description, the side where the cut waste storage section 70 is pulled out (the side facing the operator) is referred to as the front direction (also referred to as the front), and the side opposite to the direction in which the cut waste storage section 70 is pulled out is referred to as the rear direction (the side facing the operator). (also referred to as backward).

≪Main body≫
The main body portion 50 is formed in the shape of a substantially rectangular parallelepiped box, and has an opening 51 (see FIG. 5) on the upper end side. Further, a bottom plate 54 (see FIG. 3) is formed on the lower end side of the main body portion 50, and a plurality of wheels are provided on the lower surface side of the bottom plate 54. Therefore, the main body portion 50 can be moved by the wheels. Further, a box-shaped cutting unit 10 is removably fitted into the opening 51. Further, the main body part 50 has an opening cut out on the front wall side, and a cut waste storage part 70 that can be pulled out to the front side is removably fitted into the opening.

The main body portion 50 has side walls 52L and 52R erected on both sides in the left and right direction. A pair of notches 53L, 53R are formed on the upper end of the side walls 52L, 52R at positions corresponding to handle portions 12L, 12R, which will be described later. The notches 53L and 53R can expose the handle parts 12L and 12R when the cutting unit 10 is fitted into the opening 51.

Although details will be described later, in this embodiment, both the notches 53L and 53R are formed to avoid the power cord 14 so as not to interfere with the power cord 14, which will be described later. Therefore, when the cutting unit 10 is fitted into the opening 51, there is no interference between the power cord 14 and the cutouts 53L, 53R.

≪Cutting unit≫
The cutting unit 10 is for cutting sheet materials and forms the core of the shredder 1. As shown in FIG. 5, the cutting unit 10 includes a box-shaped outer frame 11 and a lid 13 provided on the upper surface of the outer frame 11. In addition, as shown in FIG. 8, the cutting unit 10 includes, in addition to the above, a cutting section 20, a sheet material placement section 30, a sheet material supply section 40, a sheet material guide section 60, a cutting section 20, and a sheet material mounting section 30. It is equipped with a motor 2 and the like that drive the material supply section 40.

As shown in FIG. 5, the outer frame 11 is formed to be detachable from the opening 51. As shown in FIG. Further, the upper surface of the outer frame 11 forms the upper surface of the shredder 1 when the cutting unit 10 is fitted into the opening 51. When the cutting unit 10 is fitted into the opening 51, it can be fixed to the main body 50 via a suitable engagement part (not shown). Further, the cutting unit 10 has handle portions 12L and 12R (only one side shown) formed on both left and right sides. Therefore, the operator can easily detach the cutting unit 10 from the main body part 50 by grasping the handle parts 12L, 12R and pulling them upward with the engaging parts disengaged.

Further, the cutting unit 10 has an outer frame 11 formed in a shape that is symmetrical with respect to the center in the vertical direction. Therefore, the cutting unit 10 can be fitted into the main body 50 with the front-rear direction reversed by 180° around the center (hereinafter simply referred to as 180° reversed unless otherwise specified). . Thereby, the cutting unit 10 can change the relationship between the horizontal component of the pull-out direction of the cut waste storage section 70 and the horizontal component of the feeding direction of the sheet material in the sheet material supply section 40. Specifically, the outer frame 11 of the cutting unit 10 can be fitted into the main body 50 with the cutting unit 10 turned 180°. Thereby, the opening/closing direction of the lid 13, which will be described later, can also be reversed by 180°.

Here, for example, when the sheet material is supplied to the cutting unit 10 from the back side to the front side of the shredder 1 in the initial state, the sheet material is supplied from the front side to the back side. be able to. Thereby, the sheet material can be prevented from protruding to the back side of the shredder 1, and as a result, the degree of freedom in the installation location of the shredder 1 can be increased. In addition, since the pull-out direction of the cut waste storage section 70 and the upstream side in the sheet material supply direction can be set to the same side as the operator side (for example, the front side), it is possible to suppress impairing operability. can.

Further, according to the present embodiment, the cutting unit 10 can be easily attached and detached by the operator grasping the handle portions 12L and 12R of the cutting unit 10. Thereby, the operator can easily change the operating direction of the cutting unit 10, and the operator's work efficiency can be improved. Further, since the cutting unit 10 has cutout portions 53L and 53R formed in the main body portion 50 at positions corresponding to the handle portions 12L and 12R, the cutting unit 10 can be cut into the main body portion without increasing the size of the main body portion 50. 50 can be accommodated in a space-saving manner. Note that the handle portions 12L and 12R are preferably provided on both side surfaces of the outer frame 11 in the left-right direction orthogonal to the front-rear direction of the cutting unit 10.

Further, as shown in FIG. 13, the outer frame 11 includes an operation switch 81 for switching the cutting unit 10 to a non-operating state or an operating state, and an information notation 82 related to the operation of the cutting unit 10. . As the operation switch 81, various types of switches can be employed, such as one for starting or stopping the cutting of the sheet material, and one for causing the supply of the sheet material to be forwarded or reversed.

The information notation 82 includes, for example, a caution notation related to the operation of the cutting unit 10 and a notation related to operation guidance for switches (for example, ON/OFF, etc.). The operation switch 81 and the information notation 82 are arranged on the top surface of the cutting unit 10 and at a position out of the extension of the sheet material in the feeding direction. Therefore, the information notation 82 is not blocked by the cover body 13 or the sheet material placed on the sheet material placement section 30, which will be described later, or becomes invisible. Thereby, it is possible to provide the shredder 1 that does not reduce the work efficiency of the operator.

In addition, in this embodiment, considering the case where the cutting unit 10 is used with the cutting unit 10 reversed by 180 degrees in the front-back direction, the information notation 82 is displayed on the top surface of the cutting unit 10 in a direction along the feeding direction of the sheet material. It is written horizontally. Thereby, deterioration in the readability of the information notation 82 can be minimized. That is, the information notation 82 can be displayed in a horizontal direction when viewed from the operator side, and thereby the information notation 82 can be prevented from being reversed. Therefore, the minimum readability of the information notation 82 can be ensured.

Further, the cutting unit 10 has a power cord 14 for supplying power to a motor 2, which will be described later. The power cord 14 is pulled out adjacent to the handle portion 12R. Further, as described above, both the cutout portions 53L and 53R of the main body portion 50 are formed so as to avoid the power cord 14. In this embodiment, the notches 53L and 53R are cut out in a step-like manner at positions corresponding to the power cord 14. Therefore, even if the cutting unit 10 is reversed by 180° in the front-back direction, interference between the power cord 14 and the main body 50 can be suppressed. Note that the direction in which the power cord 14 is pulled out and the shapes of the notches 53L and 53R can be changed as appropriate.

The motor 2 (see FIGS. 3 and 8) is provided below the rear side of the cutting unit 10. The motor 2 is driven by power supplied through a power cord 14. The motor 2 can drive rotary blades 21a and 21b in the cutting section 20, which will be described later, and a supply roller 41 in the sheet material supply section 40, using drive mechanisms such as gears 44 and 46.

As shown in FIG. 6, a pair of engagement grooves 15L and 15R are formed on the lower surface side of the outer frame 11 along the pull-out direction of the cut waste storage section 70, which will be described later. The engagement grooves 15L, 15R are formed at a predetermined interval in the left-right direction so as to face ribs 72L, 72R (see FIG. 7) of a cut waste storage section 70 (described later). The engagement grooves 15L and 15R engage with the ribs 72L and 72R when the cut waste storage section 70 is fitted into the main body section 50 from the front side to the back side. Thereby, the ribs 72L, 72R are guided along the engagement grooves 15L, 15R, and the cut waste storage section 70 is fitted into a predetermined position of the main body section 50. In addition, the width of the engagement grooves 15L, 15R is widened toward the outside at both ends in the front-rear direction, making it easy to engage the ribs 72L, 72R in the direction in which the cut waste storage section 70 is pulled out. . Thereby, regardless of the direction in which the cutting unit 10 is arranged, the cutting waste storage section 70 can be easily positioned and attached to the main body section 50.

Further, a rib detection sensor 16 is provided in one of the engagement grooves 15L and 15R (in this embodiment, the engagement groove 15R). The rib detection sensor 16 can detect that either one of the ribs 72L, 72R comes into contact. Further, the rib detection sensor 16 can switch the cutting unit 10 from the operating state to the non-operating state on the condition that the rib 72L or the rib 72R is not detected. Details of the detection of the ribs 72L and 72R by the rib detection sensor 16 will be described later.

≪Cut waste storage section≫
As shown in FIG. 7, the cut waste storage section 70 is formed in the shape of a substantially rectangular parallelepiped box, and is open toward the upper end side. The cut waste storage section 70 is formed to be slidable in the opening on the front wall side of the main body section 50, and can be attached to and detached from the main body section 50 by pulling it out from the main body section 50 toward the front side. It is said that

The cut waste storage section 70 has a pair of ribs 72L, 72R formed on the upper end sides of side walls 71L, 71R. The ribs 72L, 72R are formed at positions facing the engagement grooves 15L, 15R (see FIG. 6) formed on the lower surface side of the cutting unit 10 described above. Therefore, the ribs 72L, 72R can engage with either the engagement grooves 15L, 15R, respectively.

Here, the rib 72R on one side is provided with a low position portion 73 whose height decreases along the direction in which the cut waste storage portion 70 is pulled out. The low position portion 73 is set at a height that cannot be detected by the rib detection sensor 16 (see FIG. 6) provided in the engagement groove 15R. Therefore, when the lower position portion 73 reaches the detection position of the rib detection sensor 16 by pulling out the cut waste storage portion 70 from the main body portion 50, the rib detection sensor 16 stops detecting the rib 72R. Thereby, removal (drawing out) of the cut waste storage section 70 from the main body section 50 can be detected by the rib detection sensor 16.

Further, when the cutting unit 10 is mounted on the main body portion 50 after being reversed by 180°, the rib 72L engages with the engagement groove 15R. In such a case, it can be determined that the cut waste storage section 70 is attached to the main body section 50 by the rib detection sensor 16 detecting the rib 72L. Furthermore, when the cut waste storage section 70 is pulled out from the main body section 50 and the rib 72L is no longer detected by the rib detection sensor 16, it can be determined that the cut waste storage section 70 has been removed from the main body section 50. Therefore, regardless of the orientation in which the cutting unit 10 is installed, the rib detection sensor 16 can detect attachment and detachment of the cut waste storage section 70. Thereby, the degree of freedom in the installation direction of the shredder 1 can be increased. Note that the rib detection sensor 16 and the low position portion 73 can be placed at various positions as long as they can detect the removal of the cut waste storage section 70. Further, the rib detection sensor 16 and the low position portion 73 may be provided on the rib 72L side instead of the rib 72R.

Here, when the cut waste storage section 70 is removed, the cutting section 20 of the cutting unit 10 is exposed, so the drive of the rotary blades 21a and 21b in the cutting section 20 can be switched from an operating state to a non-operating state. is desirable. Therefore, in this embodiment, by pulling out the cutting waste storage section 70 from the main body section 50, the cutting unit 10 is changed from the operating state to the non-operating state on the condition that the low position section 73 reaches the rib detection sensor 16. I'm switching.

≪Lid body≫
As shown in FIGS. 1 to 5, the lid 13 is a substantially rectangular plate-like member, and is provided on the upper surface side of the outer frame 11. As shown in FIGS. The rear end side of the lid body 13 is rotatably supported by a rotating shaft 13a (see FIG. 8) provided along the left-right direction. In the closed state, the lid 13 covers almost the entire sheet material supply section 40, which will be described later, and is formed flush with the surface (upper surface) of the outer frame 11 of the cutting unit 10. That is, the sheet material supply section 40 is arranged at a lower position than the lid 13.

In the closed state, the distal end of the lid 13 is located near the open end of an opening 61 of a sheet material guide section 60, which will be described later. Therefore, the sheet material can be directly supplied to the sheet material guide section 60 through the opening 61. That is, the sheet material can be supplied to the cutting section 20 without using the sheet material placing section 30 or the sheet material supplying section 40, which will be described later.

The lid body 13 can support the sheet material protruding from the sheet material placement section 30 from below by rotating it around the rotating shaft 13a to open the lid body 13. Thereby, even if the dimensions of the shredder 1 in the front-rear direction are reduced, the sheet material can be stably placed on the sheet material placement section 30.

As described above, the lid 13 is formed flush with the top surface of the cutting unit 10 when in the closed state, so that it does not protrude from the top surface of the cutting unit 10. Thereby, it is possible to provide the shredder 1 without spoiling its appearance. In addition, since the lid body 13 covers a part or all of the sheet material supply section 40 in the closed state, the exposed area of the sheet material supply section 40 can be reduced when the shredder 1 is not in operation, thereby preventing damage to the appearance or damage to the shredder 1. It is possible to suppress dust and the like from entering the interior.

The direction in which the lid body 13 projects can be changed from the back side of the shredder 1 to the front side by reversing the cutting unit 10 by 180 degrees in the front-back direction. Thereby, it is possible to suppress the lid body 13 from protruding toward the rear side of the shredder 1, so that restrictions on the installation location of the shredder 1 can be eliminated.

≪Cutting section≫
As shown in FIGS. 8 and 9, the cutting section 20 includes a pair of support plates 22L and 22R (see FIG. 9) provided inside both sides of the outer frame 11 at a predetermined interval, and a support plate 22L, 22R (see FIG. 9), A pair of rotating shafts 23a and 23b are provided so as to be orthogonal to 22R. In addition, as shown in FIG. 8, the cutting section 20 includes, in addition to the above, a plurality of rotary blades 21a and 21b that are fixed to rotary shafts 23a and 23b, respectively, and are arranged at intervals in the axial direction. ing. Further, a support frame 25 is provided around the rotary blades 21a, 21b, and the rotary blades 21a, 21b are accommodated in the support frame 25. The support frame 25 has a supply port 25a on the upper side for supplying the sheet material and is open on the lower side. The support frame 25 allows the sheet material to be supplied from the supply port 25a, and the sheet material cut by passing between the rotary blades 21a and 21b to be discharged downward.

The rotating shafts 23a, 23b are formed to extend in the left-right direction orthogonal to the support plates 22L, 22R. A gear 24 is attached to one end side (in this embodiment, the support plate 22R side) of the rotating shafts 23a and 23b. The gear 24 can be rotationally driven by the motor 2, and by rotating the gear 24, the rotating shafts 23a and 23b are rotationally driven in directions opposite to each other, and the rotating blades 21a and 21b are rotated along the rotating shaft 23a. , 23b. Specifically, during normal rotation, the rotary blade 21a rotates clockwise in FIG. 8, and the rotary blade 21b rotates counterclockwise. That is, the rotary blades 21a and 21b each rotate in the sheet material supply direction. As a result, the sheet material supplied to the sheet material supply section 40, which will be described later, is cut, and the cut waste is discharged toward the cut waste storage section 70. Further, when the rotation is reversed, the respective rotary blades 21a and 21b rotate in the opposite direction. Thereby, for example, when the sheet material is jammed in the cutting section 20, the sheet material can be fed backwards to clear the jam.

≪Sheet material placement section≫
As shown in FIG. 8, the sheet material placement section 30 is arranged at the upper rear side of the cutting section 20. Therefore, the supply route A (also referred to as the first supply route A) to the sheet material cutting unit 20 can be shortened. The sheet material placement section 30 is supported by a pair of support plates 22L and 22R in a state aligned with a sheet material supply section 40, which will be described later.

The sheet material placement section 30 can place one or more sheet materials to be supplied to the cutting section 20 side. As shown in FIGS. 8 and 11, the sheet material placement section 30 includes a support wall 31 that supports one or more sheet materials from below, and a support wall 31 that supports one or more sheet materials from below, and a For example, it includes an inclined wall 33 that is inclined at an angle of 100° or more with respect to the supporting wall 31. In addition to the above, the sheet material placement section 30 also includes an arcuate wall 35 (see FIG. 8) having an arcuate cross section extending from the downstream end of the inclined wall 33 in the supply direction toward the cutting section 20; A pair of standing walls 37L, 37R, etc. are provided on both left and right end sides of the wall 31 and the arcuate wall 35.

The support wall 31 is inclined so that the supply side tip of the sheet material faces downward when the sheet material is placed thereon. Therefore, the sheet material placed on the support wall 31 is guided by its own weight toward the downstream side of the support wall 31 in the supply direction. The upper surface of the support wall 31 forms a placement surface 31a on which a sheet material is placed. The support wall 31 has a recess 31b in a portion corresponding to a supply roller 41, which will be described later.

The mounting surface 31a is configured to be connected to the upper surface side of the lid 13 and form a substantially straight line when the lid 13 is in an open state. Therefore, the sheet material placement section 30 may also include the placement surface of the lid 13.

The inclined wall 33 may extend at an obtuse angle with respect to the mounting surface 31a in the thickness direction of the sheet material, for example, extend at an angle in the range of 100° or more and 135° or less (direction inclined with respect to the thickness direction). It is formed like this. Thereby, the sheet material placed on the placement surface 31a can be moved downward, and the sheet material can be smoothly supplied to the cutting section 20 side.

As shown in FIG. 8, the arcuate wall 35 is formed so that its lower extending end is at approximately the same height as the lower end of the support wall 31 in the vertical direction. The arcuate wall 35 extends in an arcuate manner so as to be convex upward.

As shown in FIGS. 10 and 11, the upright walls 37L and 37R restrict the movement of the sheet material placed on the placement surface 31a and the sheet material in the process of being fed in the left-right direction. The standing walls 37L, 37R are supported by support plates 22L, 22R (see FIG. 9) by appropriate means. Further, shaft holes 38, 38 are formed in the upright walls 37L, 37R on the upper front end side. A rotating shaft 47 in a sheet material supply section 40, which will be described later, is rotatably supported in the shaft holes 38, 38.

≪Sheet material supply section≫
As shown in FIG. 8, the sheet material supply section 40 is arranged above the cutting section 20. The sheet material supply section 40 can supply the sheet material placed on the sheet material placement section 30 to the cutting section 20 along a predetermined feeding direction. The sheet material supply section 40 includes a supply roller 41, a roller rotation shaft 42 that rotationally drives the supply roller 41, and a support frame 43 that integrally supports the sheet material supply section 40. In addition to the above, the sheet material supply unit 40 includes a gear 44 that is rotatably supported by the support frame 43 and transmits the rotation of the roller rotation shaft 42 to the supply roller 41, and a gear 44 that connects the support frame 43 to the sheet material side (lower side). The support frame 43 includes a spring 45 that urges the support frame 43 toward a closed state and a rotating shaft 47 that rotates the support frame 43 between a closed state and an open state.

The support frame 43 forms an outer wall of the sheet material supply section 40. The support frame 43 has an upper wall 43a formed parallel to the top surface of the cutting unit 10, and an inclined wall 43b having a surface facing the mounting surface 31a. In addition to the above, the support frame 43 includes an upper supply wall 43c facing a part of the arcuate wall 35, a guide wall 43d facing a first guide surface 62 in a sheet material guide section 60, which will be described later, and the support frame 43. It has a pair of side walls 43e, 43e (see FIG. 11, one side is not shown) erected on both sides in the left-right direction (width direction).

The upper wall 43a is parallel to the top surface of the cutting unit 10 when the support frame 43 is in the closed state, and is covered by the lid 13 in the closed state. The front end side of the upper wall 43a forms an open end of the opening 61 of the sheet material guide section 60. Further, the front end side of the upper wall 43a is inclined downward. As a result, the opening 61 is widened.

The inclined wall 43b is formed at a distance from the mounting surface 31a so as to be substantially parallel to the inclination direction of the mounting surface 31a in the sheet material mounting section 30 in the closed state. Further, the inclined wall 43b has a through hole 41a (see FIG. 4) at a position corresponding to the supply roller 41, and a portion of the supply roller 41 is exposed from the through hole 41a. As a result, as the supply roller 41 rotates, the sheet materials placed on the sheet material placement section 30 are separated one by one from the uppermost surface and supplied to the cutting section 20 side.

In the closed state, the upper supply wall 43c is formed so as to face the arcuate wall 35 in the sheet material placement section 30 and to be spaced apart from the arcuate wall 35. The upper supply wall 43c is formed so that its front end side is connected to the supply port 25a in the cutting section 20. The upper supply wall 43c is formed in an arc shape so as to be upwardly convex from the front end side to the rear end side, and the rear end side is formed in a row to the front end side of the inclined wall 43b. As a result, a first supply path A for the sheet material is formed between the upper supply wall 43c and the arcuate wall 35.

The guide wall 43d extends downward in a substantially straight line when the sheet material supply section 40 is in the closed state. In the closed state, the guide wall 43d faces the first guide surface 62 in the sheet material guide section 60 with a predetermined distance therebetween. That is, the guide wall 43d forms at least a part of the second guide surface 63 that is formed opposite to the first guide surface 62. Thereby, a sheet material supply path B (also referred to as a second supply path B) is formed between the guide wall 43d and the first guide surface 62.

As shown in FIGS. 10 and 11, the side walls 43e, 43e are erected at a predetermined interval in the width direction of the cutting unit 10. The side walls 43e, 43e support the above-mentioned upper surface wall 43a, inclined wall 43b, upper supply wall 43c, and guide wall 43d from the side. In addition, an operation changeover switch 48 is attached to the one side standing wall 37L near the portion supporting the rotating shaft 47 on the outer surface. Details of the operation changeover switch 48 will be described later.

As shown in FIG. 8, the roller rotation shaft 42 is provided along a direction perpendicular to the feeding direction of the sheet material, and both ends are rotatably supported by side walls 43e, 43e (see FIG. 11) of the support frame 43. has been done. Furthermore, a gear 46 (see FIG. 9) for transmitting the driving force of the motor 2 is attached to one end side of the roller rotation shaft 42. Therefore, by driving the motor 2, the roller rotation shaft 42 is rotated. Further, the roller rotation shaft 42 has a gear 44 for transmitting rotation to the supply roller 41.

A plurality of supply rollers 41 (two in this embodiment) are provided at intervals in the axial direction of the roller rotation shaft 42 . The supply roller 41 is made of, for example, a material such as rubber or resin that has a large coefficient of friction against the sheet material. The supply roller 41 is urged toward the sheet material placement section 30 by a spring 45 with the support frame 43 in the closed state. Furthermore, the supply roller 41 is rotated via a gear 44 by rotationally driving the roller rotation shaft 42 . As a result, the sheet materials placed on the sheet material placement section 30 are separated one by one from the top and supplied to the first supply path A.

As shown in FIGS. 10 and 11, the rotating shaft 47 is formed to protrude outward from the side walls 43e, 43e in a direction perpendicular to the feeding direction of the sheet material. The side walls 43e, 43e are formed, for example, by resin molding using resin as a material. In this embodiment, the rotating shaft 47 is integrally formed with the side walls 43e, 43e (support frame 43) by resin molding or the like. Thereby, the number of parts can be reduced, and errors in the rotational operation of the sheet material supply section can be reduced. Therefore, the shredder 1 can be operated stably. Furthermore, a protrusion 47a is formed at one end of the rotating shaft 47 for switching an operation changeover switch 48, which will be described later, from an activated state to a non-activated state.

Both ends of the rotating shaft 47 are rotatably supported in shaft holes 38, 38 formed in the upright walls 37L, 37R of the sheet material mounting section 30. A portion of the shaft hole 38 is cut out so that the projection 47a can pass therethrough, and by aligning the projection 47a with the notch, the rotating shaft 47 can be inserted into the shaft hole 38. The sheet material supply section 40 can be rotated about the rotating shaft 47 from a closed state to an open state. Therefore, as shown in FIG. 12(b), by rotating the sheet material supply section 40 from the closed state to the open state, the upper side extends from the first supply path A to the supply port 25a of the cutting section 20. open and exposed. This makes it easier to access the location where the sheet material is jammed, and improves the ability to remove the jammed sheet material.

Here, as shown in FIG. 8, the rotation shaft 47 has a distance D1 (also referred to as a first distance D1) from the axis center to the second guide surface 63, and a distance between the axis center of the rotation shaft 47 and the top wall 43a. (also referred to as a second distance D2). Therefore, when the sheet material supply section 40 is rotated from the closed state to the open state, the opening width of the second supply path B can be widened.

Specifically, the turning radius (second distance D2) of the upper surface of the sheet material supply section 40 is smaller than the turning radius (first distance D1) of the second guide surface 63 when the sheet material supply section 40 is in the closed state. When the sheet material supply section 40 is opened, the upper wall 43a of the sheet material supply section 40, which is arranged to face the first guide surface 62, moves away from the first guide surface 62. That is, as shown in FIG. 12(b), the opening width a of the first guide surface 62 and the second guide surface 63 in the closed state is expanded to the opening width b in the open state. Therefore, access to the supply port 25a in the cutting section 20 becomes easy, and it is possible to improve the removability of the sheet material stuck near the supply port 25a. In this embodiment, for convenience of explanation, FIG. 12(b) depicts an open state in which the top wall 43a is oriented upward at 90 degrees; however, as shown in FIG. The material supply section 40 can be rotated by 90 degrees or more to further expose the first supply path A. Further, the sheet material supply section 40 may be held in an upright state facing upward at 90 degrees by appropriate engagement means. According to this configuration, clogging of the sheet material in the first supply route A and the second supply route B can be easily eliminated.

As shown in FIG. 10, the projection 47a is formed on one end side of the rotating shaft 47, and is formed by making a part of the outer periphery of the rotating shaft 47 protrude in the radial direction. When the sheet material supply section 40 is rotated from the closed state to the open state, the protrusion 47a comes into contact with the operation changeover switch 48 and can actuate (for example, push in) the operation changeover switch 48.

As described above, the operation changeover switch 48 is provided on the one side standing wall 37L. The operation changeover switch 48 can switch the cutting unit 10 from an operating state to a non-operating state. That is, the operation changeover switch 48 can stop the cutting unit 10. Specifically, when the sheet material supply section 40 is rotated from the closed state to the open state, the protrusion 47a contacts the operation changeover switch 48, and the operation changeover switch 48 is activated to change the operation of the cutting unit 10. It can be stopped.

Here, the operation changeover switch 48 is arranged outside the standing wall 37L, in other words, outside the cutting part 20. Therefore, the influence of cutting waste by the cutting section 20 can be reduced. Thereby, the operation changeover switch can be operated stably, and the durability of the operation changeover switch 48 can also be improved.

≪Sheet material guide section≫
As shown in FIG. 8, the sheet material guide section 60 has a second supply path B that is separate from the sheet material supply section 40. The second supply path B extends downward from the opening 61 in a substantially straight line, and its lower end communicates with the supply port 25a of the cutting section 20. Further, the sheet material guide section 60 has a first guide surface 62 and a second guide surface 63 that face each other. Specifically, the first guide surface 62 forms the front end of the opening 61 , and the second guide surface 63 forms the rear end of the opening 61 . Therefore, it is possible to directly feed the sheet material to the supply port 25a along the first guide surface 62 and the second guide surface 63 (second supply path B) without using the sheet material supply section 40.

In the present embodiment, in the sheet material guide section 60, the guide wall 43d that constitutes the sheet material supply section 40 constitutes at least a part of the second guide surface 63. That is, a part of the second guide surface 63 is shared with the guide wall 43d. Therefore, the sheet material supply section 40 can be rotated without interfering with the first guide surface 62. Thereby, even if the sheet material becomes jammed near the cutting section 20, it becomes possible to easily access the jammed sheet material. Moreover, the removability of the jammed sheet material can be improved.

The above is one embodiment of the shredder 1 according to the present invention, but the present invention is not limited to the embodiment described above, and various modifications can be made.

≪Modification 1≫
As shown in FIG. 14, in the first modification, a plurality (two) of operation switches 81 are provided. The operation switches 81 , 81 are arranged on both the front side of the cutting unit 10 (the side in the drawing-out direction of the cut waste storage section 70 ) and the back side of the cutting unit 10 . Therefore, the cutting unit 10 can be operated by the operating switch 81 arranged on the side of the cutting waste storage section 70 in the drawing direction. Here, the direction in which the shredded waste storage section 70 is pulled out (for example, the front side of the shredder 1) can be set to the operation side of the operator. Therefore, the operator can operate the operation switch 81 on the side closer to the operator. Thereby, even if the sheet material supply direction of the cutting unit 10 is changed (for example, reversed by 180 degrees), it is possible to prevent the operability by the operator from being impaired.

In addition, the operation switches 81, 81 can be switched so that only one of them can be operated. Switching of the operation targets of the operation switches 81, 81 can be performed by an appropriately provided detection means (not shown) for detecting the feeding direction of the sheet material. Note that various detection sensors can be employed as the detection means. Further, the operation target of the operation switches 81, 81 is changed so that only the operation switch 81 disposed on the pull-out direction side of the cut waste storage section 70 becomes the operation target based on the feeding direction detected by the detection means. It is recommended to switch to . Thereby, only the operation switch 81 on the operator side (for example, the front side) of the shredder 1 can be operated. Therefore, even if the sheet material supply direction of the cutting unit 10 is changed (for example, reversed by 180° back and forth), it is possible to prevent the operability by the operator from being impaired.

The above is the structure of the first modification of the shredder 1 according to the present invention, and next, the usage form of the shredder 1 according to the present invention will be explained.

In the initial state of the shredder 1, as shown in FIG. 2, the cutting unit 10 is arranged so that the lid 13 opens rearward. Therefore, when laminated sheet materials are automatically fed, in order to place the sheet materials on the sheet material placement section 30, the lid body 13 is opened (tilted backward) and the sheet materials are placed on the sheet material placement section 30. It is necessary to expose the mounting section 30. Therefore, if there is a wall or the like on the rear side of the shredder 1, the lid body 13 interferes with the wall or the like.

In order to eliminate the interference between the lid 13 and the wall, etc., as described above, the shredder 1 removes the cutting unit 10 from the main body 50 and cuts it 180 degrees around the central axis in the vertical direction, as shown in FIG. ° Can be rotated. Thereby, the opening/closing direction of the lid body 13 can be reversed by 180° in the front-rear direction, and interference with the rear wall or the like can be eliminated.

At this time, if a plurality of operation switches 81 are provided as in Modification 1, the operation switch 81 on the operator side (front side) is switched to be the operation target. Next, in order to expose the sheet material placement section 30, the sheet material supply section 40 is opened as shown in FIGS. 4 and 12(b), and one or more sheet materials are placed on the sheet material placement section 30. At the same time, the sheet material supply section 40 is again closed. When the sheet material supply section 40 is brought into the closed state, the operation switch 81 is switched from the non-operating state to the operating state. As a result, the supply roller 41 rotates, and the sheet material is supplied to the supply port 25a of the cutting section 20 through the first supply path A. Further, the rotary blades 21a and 21b are driven to rotate, and the sheet material is cut into thin pieces. The cut waste falls below the cutting section 20 and is stored in the cut waste storage section 70. Note that the presence or absence of the sheet material can be detected by an appropriately provided sensor.

On the other hand, when cutting a predetermined number of sheets of sheet material without using the sheet material placement section 30, the sheet material is put into the opening 61 with the lid 13 in the closed or open state. Thereby, it is supplied to the supply port 25a of the cutting section 20 through the second supply route B. Further, similarly to the above, the sheet material is cut into thin pieces by the rotary blades 21a and 21b, and the cut waste is stored in the cut waste storage section 70.

Here, the sheet material may become jammed while the sheet material is being cut. In such cases, it is necessary to access the location where the sheet material is jammed in order to clear the jam. Therefore, in the shredder 1 according to the present invention, the sheet material supply section 40 is changed from the closed state shown in FIG. 12(a) to the open state shown in FIGS. 4 and 12(b), thereby making it easier to expose the paper jam location. be able to. Furthermore, as described above, in the shredder 1 of the present invention, since the second distance D2 in the sheet material supply section 40 is smaller than the first distance D1 in the closed state of the sheet material supply section 40, the sheet material supply section 40 is When changing from the closed state to the open state, the opening width a of the first guide surface 62 and the second guide surface 63 is expanded to the opening width b. Therefore, it is possible to easily access the jammed portion of the sheet material. Thereby, the jammed sheet material can be easily removed. Note that if the first supply path A side is clogged with sheet material, the sheet material supply section 40 can be rotated further than the state shown in FIG. 12(b) so that the upper wall 43a is inclined in an obtuse angle direction. good.

The embodiments of the shredder 1 according to the present invention have been described above, but the present invention is not limited to the embodiments described above, and various modifications can be made.

The cutting unit 10, the cut waste storage section 70, and the main body section 50 used in the present invention are not limited to the shapes and sizes of the embodiments described above, and various shapes and sizes can be used. can. Further, in this embodiment, the cut waste storage section 70 is provided with ribs 72L, 72R, and the ribs 72L, 72R are configured to engage with the engagement grooves 15L, 15R provided in the outer frame 11 of the cutting unit 10, respectively. Although illustrated, the accommodation of the cut waste storage section 70 in the main body section 50 is not limited to this. For example, the ribs 72L, 72R and the engagement grooves 15L, 15R may not be provided. Moreover, various methods can be adopted for storing the cut waste storage section 70 in the main body section 50. The drawing direction of the cut waste storage section 70 can also be changed to various directions.

Further, in this embodiment, the cutting unit 10 can be used by being reversed by 180 degrees in the front-back direction, but the cutting unit 10 has a horizontal component in the drawing direction of the cut waste storage section 70 and a sheet material supply section. The direction can be changed to various directions depending on the relationship with the horizontal component of the feeding direction of the sheet material in 40.

In this embodiment, the cutting unit 10 is formed to be removable from the main body 50, but the cutting unit 10 is not limited to a removable type, and may be of various types. For example, the cutting unit 10 may be rotatably supported by the main body 50.

In this embodiment, the cutting unit 10 is assumed to have a pair of handle parts 12L, 12R, but the handle parts 12L, 12R may be provided as needed. You can also choose not to. Further, the handle portions 12L and 12R may have various shapes and sizes. Further, in this embodiment, the main body part 50 has cutouts 53L and 53R for exposing the handle parts 12L and 12R at positions corresponding to the handle parts 12L and 12R, but the cutouts The portions 53L and 53R may be provided as necessary, and the cutout portions 53L and 53R may not be provided. In such a case, it is desirable to provide the handle portions 12L, 12R at positions that do not overlap the main body portion 50.

Further, in this embodiment, the operation switch 81 and the information notation 82 are arranged on the top surface of the cutting unit 10 and at a position that is out of the extension of the sheet material feeding direction. Information notation 82 can be placed in various positions. Further, the information notation 82 can be written in various directions. For example, the information notation 82 can be written in a direction different from the feeding direction of the sheet material. Furthermore, it is possible to write not only horizontally but also in various directions such as vertically, and various languages, fonts, and other symbols can be used.

In this embodiment, a configuration in which two operation switches 81 of the shredder 1 are provided is illustrated, but a single operation switch 81 or two or more operation switches 81 may be provided. Further, in the present embodiment, when the relationship between the pulling direction of the cut waste storage section 70 and the horizontal component of the sheet material feeding direction is changed, at least one operation switch 81 Although a configuration in which the operation switch 81 is disposed on the direction side is illustrated, the location where the operation switch 81 is disposed can be changed as appropriate. For example, the operation switch 81 can be provided at each position on the top surface of the outer frame 11, such as on the side opposite to the direction in which the cut waste storage section 70 is pulled out. Further, the operation switch 81 may be arranged not only on the top surface of the outer frame 11 but also on the side surface of the outer frame 11.

Furthermore, in the present embodiment, the cutting unit 10 has a configuration in which the cutting unit 10 includes a detection means for detecting the feeding direction of the sheet material, but a configuration in which the detection means is not provided may also be adopted. Further, in the case where a detection means for detecting the feeding direction of the sheet material is provided, the location where the detection means is arranged can be changed as appropriate. Moreover, various detection sensors such as a contact switch and a proximity sensor can be used as the detection means. Further, in this embodiment, a plurality of operation switches 81 are provided, and based on the sheet material feeding direction detected by the detection means, only the operation switch 81 disposed on the drawing-out direction side of the cut waste storage section 70 is selected. Although the present invention is configured so that it can be switched so that it becomes an operation target, the present invention is not limited to this. For example, the operation target of the operation switch 81 may be changed manually without being based on the detection means.

In this embodiment, the sheet material supply section 40 is arranged at a position retracted from the surface of the cutting unit 10, but depending on the shape of the lid 13, the position retracted from the surface of the cutting unit 10 may be Can be changed. If the lid 13 is not provided, the sheet material supply section 40 does not need to be retracted from the cutting unit 10. Further, in the present embodiment, the lid 13 covers part or all of the sheet material supply section 40 in the closed state, but it is assumed that the lid 13 does not cover the sheet material supply section 40. Good too. Furthermore, in the present embodiment, the lid 13 is flush with the surface of the cutting unit 10 in the closed state; however, the lid 13 is flush with the surface of the cutting unit 10 in the closed state. It does not have to be.

Further, in the present embodiment, the cutting unit 10 has the second supply route B that is separate from the sheet material supply section 40, but it may not have the second supply route B. Further, in the present embodiment, a part of the outer wall that constitutes the sheet material supply section 40 constitutes at least a part of the second guide surface 63, but the outer wall that constitutes the sheet material supply section 40 is The second guide surface 63 may not be provided.

Furthermore, in the present embodiment, at least a portion of the upper surface of the sheet material supply section 40 can face the first guide surface 62 by rotating from the closed state to the open state. At least a portion of the upper surface of 40 may not face the first guide surface 62 in the open state. Further, although the first distance D1 from the axis of the rotating shaft 47 to the second guide surface 63 is larger than the second distance D2 from the axis to the upper surface, this example is However, the first distance D1 and the second distance D2 can be set to various distances. For example, the first distance D1 and the second distance D2 may be the same distance, or the first distance D1 may be smaller than the second distance D2.

The above are various embodiments and modified examples of the shredder 1 according to the present invention, but the present invention is not limited to the embodiments and modified examples described above, and does not depart from the scope of the claims. It will be readily apparent to those skilled in the art that other embodiments are possible within the scope and spirit of the teachings thereof.

The shredder of the present invention can be used to cut various unnecessary sheet materials (paper, resin sheets, etc.).

1: Shredder 2: Motor 10: Cutting unit 11: Outer frame 12L: Handle part 12R: Handle part 13: Lid body 14: Power cord 15L: Engagement groove 15R: Engagement groove 16: Rib detection sensor 20: Cutting part 21a : Rotary blade 21b: Rotary blade 25a: Supply port 30: Sheet material placement section 31: Support wall 31a: Placement surface 40: Sheet material supply section 41: Supply roller 43a: Top wall (top surface)
43d: Guide wall 47: Rotating shaft 47a: Projection 48: Operation selector switch 50: Main body 51: Opening 53L: Notch 53R: Notch 60: Sheet material guide 61: Opening 62: First guide Surface 63: Second guide surface 70: Cutting waste storage section 72L: Rib 72R: Rib 73: Low position section 81: Operation switch 82: Information notation A: First supply route B: Second supply route D1: First distance D2 :Second distance

Claims (2)

a cutting section equipped with a rotary blade for cutting the sheet material;
a sheet material placement section for placing the sheet material;
A cutting unit including a sheet material supply section that supplies the sheet material placed on the sheet material mounting section to the cutting section along a predetermined feeding direction,
The cutting unit has a supply route separate from the sheet material supply section, and has a sheet material guide section that communicates with the sheet material supply port in the cutting section,
The sheet material guide section has a first guide surface and a second guide surface that face each other, and directly runs along the first guide surface and the second guide surface without going through the sheet material supply section. It is possible to feed the sheet material into the supply port,
A part of the outer wall constituting the sheet material supply section constitutes at least a part of the second guide surface,
The sheet material supply section can be opened and closed by rotating around a rotation axis perpendicular to the feeding direction of the sheet material, and in the open state, the supply port is exposed and the first A shredder characterized in that an opening width between a guide surface and the second guide surface is expanded . At least a portion of the upper surface of the sheet material supply section can be opposed to the first guide surface by rotating from a closed state to an open state,
The first distance from the axis of the rotating shaft to the second guide surface is
The shredder according to claim 1 , wherein the shredder is formed to be larger than a second distance between the axis and the upper surface.

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