JP2019018146A - Shredder - Google Patents

Abstract

To provide a shredder in which even if a sheet-like material is jammed, such a jamming state can be released with a good efficiency.SOLUTION: A shredder comprising a shredding part comprising a rotatably supported rotary cutter, a drive part which rotationally drives the rotary cutter, and a control part which controls the drive part. The control part performs normal shredding treatment for driving normal rotation of the rotary cutter to the sheet-like material which has been inputted into the shredding part, and jamming release treatment for continuously performing normal rotation drive and reverse rotation drive of the rotary cutter to the sheet-like material which has been inputted into the shredding part. When a load of rotational drive during normal rotation drive or reverse rotation drive of the rotary cutter becomes a threshold or more during the jamming release treatment, a rotation direction of the rotary cutter is reversed.SELECTED DRAWING: Figure 8

Description

  The present invention relates to a shredder that can release a jammed sheet-like material.

As a technique for solving a sheet jam that occurs in a shredder that shreds a sheet-like object such as paper or a sheet, for example, a paper jam in a shredding processing unit is detected, and after detecting the jamming, the driving unit is stopped and vice versa. It is disclosed that paper jam removal processing is performed by repeating rotational driving with a direction (Patent Document 1).
In Patent Document 1, when a paper jam occurs, a paper jam message is displayed, and after receiving a press of a paper jam removal button from the user, the crushing motor is rotated forward, reverse, and forward (FIG. 6). See), the crushing motor is rotated forward, reverse, forward, and reverse (see FIG. 10). Reverse rotation and forward rotation are performed for a certain time.

JP 2006-181478 A

In the technique of Patent Document 1, the crushing motor for paper jam removal processing is controlled so as to reverse when rotated for a certain time. As a result, for example, even if a high load is applied to the crushing motor and cannot be shredded, the rotation is reversed even if a certain amount of time has passed or vice versa. Sometimes. That is, there is a problem that it takes time to remove a paper jam.
This invention is made | formed in view of such a situation, Comprising: Even when a sheet-like thing is jammed, it aims at providing the shredder which can cancel the clogged state efficiently.

  In order to solve the above-described problem, a shredder according to an aspect of the present invention controls a shredder including a rotary blade that is rotatably supported, a drive unit that rotationally drives the rotary blade, and the drive unit. A control unit, and the control unit is configured to perform normal shredding processing for driving the rotary blade to rotate forward with respect to the sheet-like material put into the shredding unit, and the sheet-like material put into the shredding unit. The clogging elimination process in which the forward rotation driving and the reverse rotation driving of the rotary blade are continuously performed is performed, and during the clogging elimination processing, during the forward rotation driving or the reverse rotation driving of the rotary blade When the rotational driving load is equal to or greater than the threshold value, the rotational direction of the rotary blade is reversed.

  According to the present invention, when the rotational drive load reaches the threshold value, the rotation is reversed, and when the load does not reach the threshold value, the rotation is performed as it is, so that the clogged state can be efficiently released.

It is a perspective view which shows the shredder which concerns on 1st Embodiment. It is sectional drawing of the shredder of 1st Embodiment. It is the perspective view which expanded the cutting section periphery section of a 1st embodiment. It is a block diagram of the shredder of 1st Embodiment. It is a figure explaining the fluctuation | variation of the drive current value in the normal shredding process of 1st Embodiment. It is a figure explaining the fluctuation | variation of the drive current value in the clogging elimination process of 1st Embodiment, (a) shows the case where all the sheets are shredded, (b) is a part of sheet | seat shredded. The case where it remains without. It is explanatory drawing explaining the forced shredding in the clogging release process. It is a main flowchart of the main process of the control unit of 1st Embodiment. It is a subflowchart of the excessive injection determination process of the control unit of 1st Embodiment. It is a sub-flowchart of the end judgment processing of the control unit of a 1st embodiment. It is a subflowchart of the clogging elimination process of the control unit of 1st Embodiment. It is a sub-flowchart of the cleaning process of the control unit of a 1st embodiment. It is a figure which shows the fluctuation | variation of the drive current value in the normal shredding process of 2nd Embodiment, a discharge process, and a clogging elimination process. It is a flowchart of a part of main process of the control unit of 2nd Embodiment. It is a sub-flowchart of discharge processing of a control unit of a 2nd embodiment. It is a block diagram of the shredder of 3rd Embodiment. It is a main flowchart of the control unit of 3rd Embodiment. It is a subflowchart of the normal shredding process instruction | indication of the control unit of 3rd Embodiment. It is a main flowchart of the power supply unit of 3rd Embodiment. It is a sub flowchart of the normal shredding process of the power supply unit of 3rd Embodiment. It is a figure which shows the modification about an operation button. It is a flowchart of the clogging elimination process which concerns on a modification.

<Overview>
A shredder according to one aspect includes a shredding unit including a rotary blade that is rotatably supported, a drive unit that rotationally drives the rotary blade, and a control unit that controls the drive unit, and the control unit includes: A normal shredding process in which the rotary blade is driven to rotate forward with respect to the sheet-like material charged in the shredded portion; and a normal rotation drive of the rotary blade with respect to the sheet-like material charged in the shredded portion; When the clogging elimination process for continuously performing the reverse rotation driving is performed, and the load of the rotational driving during the forward rotation driving or the reverse rotation driving of the rotary blade is greater than or equal to a threshold value during the clogging elimination processing, The direction of rotation of the rotary blade is reversed. Thereby, it can be prevented that the rotary blade cannot be rotated due to the clogging of the sheet-like material.
In the shredder according to another aspect, the control unit performs a discharging process for driving the rotary blade to rotate in reverse before the clogging eliminating process, and the sheet-like material cannot be discharged from the shredded part by the discharging process. In this case, the clogging elimination process is performed. Thereby, when the sheet-like thing more than a shredding capability is thrown in, a sheet-like thing is returned by reverse rotation of a rotary blade, and the bite of the sheet-like thing by a shredding part can be eliminated.
The shredder which concerns on another aspect WHEREIN: The said control part will implement the said clogging elimination process, if there exists operation input of the execution instruction | indication of the said clogging elimination processing. As a result, the user can visually determine whether it is difficult to remove the sheet-like material by hand, and the use of the clogging elimination process can be left to the user's intention.

In the shredder according to another aspect, the control unit includes a counting unit that counts the number of times the normal shredding process has been performed, and the control unit corrects the rotation blade every time the number of processes reaches a set value. A cleaning process is performed in which the rotation drive and the reverse rotation drive are continuously performed. Thereby, clogging can be prevented by cleaning the shredded portion every time the number of processing times reaches the set value.
In the shredder according to another aspect, the control unit interrupts the cleaning process and performs the normal shredding process when a sheet-like material is input during the cleaning process. Thereby, normal shredding can be performed with priority.

The shredder which concerns on another aspect WHEREIN: The said rotary blade has a fluororesin layer in the area | region which contacts the said sheet-like object. Thereby, even if it is a sheet-like object with an adhesive, for example, it can be made difficult to adhere to a rotary blade, and clogging can be made hard to occur.
In the shredder according to another aspect, the shredder includes a pair of rotating shafts, a plurality of rotating blades, and a plurality of scrapers, and the plurality of rotating blades are spaced from the rotating shaft along the tube axis. The scraper is disposed between the rotary blades attached at intervals, and is made of a low friction resin material. Thereby, even if it is a sheet-like thing with an adhesive, for example, it can be hard to adhere to a scraper, and generation | occurrence | production of clogging can be prevented.

<First Embodiment>
1. Structure The structure will be described with reference to FIGS.
The shredder 1 includes shredding units 2 and 3, a drive unit 4, and a control unit 5 in a housing 6. The shredder 1 includes a power supply unit 7 that mainly supplies power to the drive unit 4 and the control unit 5 in a housing 6. The shredder 1 includes operation buttons 82 a and 82 b for the user to manually operate the shredding units 2 and 3, and a power switch 83 in the housing 6. The shredder 1 includes a display unit 86 having an operation indicator lamp 86a for indicating that the operation is possible by turning on the power switch 83 and an error indicator lamp 86b for indicating that the sheet is jammed. Prepare.

When a sheet-like material to be shredded (hereinafter simply referred to as “sheet”) is loaded from the loading opening 61a of the housing 6, the shredding units 2 and 3 are driven by the drive unit 4 and the loaded sheet is loaded. Are shredded by the shredding units 2 and 3, and the shredded waste is housed in a waste storage box (not shown) disposed below the shredding units 2 and 3.
Here, in the direction in which the sheet is inserted from the insertion port 61a of the housing 6 and moves inside, the side to which the sheet faces is the downstream side. Further, the rotation of the rotary blades 23 and 33 (see FIG. 3) for chopping the sheet traveling toward the downstream is defined as normal rotation, and the rotation in the direction opposite to the normal rotation direction is defined as reverse rotation.

Hereinafter, main units and the like will be described.
(1) Housing A description will be given with reference to FIGS. 1 and 2.
The housing 6 has a box shape, a sheet is inserted from the upper wall 61, and a front wall 62 is provided so as to be freely opened and closed.
On the upper wall 61, there are input ports 61a and 61b (see FIG. 2) for inputting sheets to the shredding units 2 and 3, and guides 61c for guiding the inserted sheets to the shredding units 2 and 3. 61d. The inlet 61a and the guide 61c are for the shredding unit 2, and the inlet 61b and the guide 61d are for the shredding unit 3.
On the upper wall 61, operation buttons 82a and 82b for manually operating the shredding units 2 and 3 are provided. The operation button 82a is for rotating the shredding units 2 and 3 in the forward direction, and the operation button 82b is for rotating the shredding units 2 and 3 in the reverse direction. The operation buttons 82a and 82b operate when the shredding units 2 and 3 operate during operation, and when the operation is stopped, the shredding units 2 and 3 stop.

The upper wall 61 has an error indicator lamp 86b that displays an error (in this case, is lit) when the jammed sheet cannot be cleared even after the jam clearing process, and the user indicates that the jammed condition is present. An operation button 87 is provided for inputting what is known. The operation button 87 is for operating the shredded unit 2 in the stopped state, and is also used as the power switch 83.
As shown in FIG. 2, the housing 6 accommodates the shredding units 2 and 3, the drive unit 4, the control unit 5, and the power supply unit 7 on the upper side, and the waste storage box below the shredding units 2 and 3 To do.

(2) Shredding unit The shredding units 2 and 3 are of two types: a cross shredding unit 2 for cross cut and a straight shredding unit 3 for straight cut.

(2-1) Cross Shredding Unit As shown in FIG. 3, the cross shredding unit 2 includes a frame 21, a pair of rotating shafts 22 that are rotatable and supported in parallel with the frame 21, and each rotating shaft. 22 is provided with a rotary blade 23 arranged at intervals in the tube axis direction and a scraper 24 arranged between the rotary blades 23 adjacent to each other in the tube axis direction of each rotary shaft 22. Each rotary shaft 22 is driven by the drive unit 4.
The frame 21 has a box shape in which a direction orthogonal to a plane including the central axis of the pair of rotating shafts 22 opens. The opening is continuous with the downstream end of the guide 61c, and allows the sheet to be smoothly received.
The frame 21 supports the rotation shaft 22 with side walls orthogonal to the pair of rotation shafts 22. The rotary blades 23 here are provided as a set of two sheets. The rotary blade 23 has a disk shape, and has one or a plurality (three in this case) of cutter blades 23a on the outer peripheral edge with a circumferential interval. The cutter blade 23a here extends in a triangular shape outward in the radial direction.

A fluorine layer is formed on at least the outer peripheral edge 23b and the cutter blade 23a of the rotary blade 23. Thereby, it is possible to make it difficult for the adhesive in the sheet form to adhere to the rotary blade 23. Examples of the sheet-like material to which the adhesive is attached include an envelope with a glue, a sticky note, an invoice slip such as a courier.
As shown in FIG. 3, the scraper 24 is provided on the other rotary shaft 22 so as to face a pair of rotary blades 23 on one rotary shaft 22. In other words, the pair of rotating shafts 22 are arranged while being alternately switched in the axial direction in a state where the pair of rotating blades 23 and the scraper 24 face each other. The scraper 24 provided on each rotating shaft 22 is supported by an extending rod 25 extending parallel to the rotating shaft 22 being inserted through the through hole of the scraper 24.

The scraper 24 includes a flat plate portion 24a that faces the rotary blade 23, and an outer flange portion 24b that projects from the outer peripheral edge of both main surfaces of the flat plate portion 24a in the thickness direction of the flat plate portion 24a. The outer flange portion 24b has a semicircular arc shape when viewed from the extending direction of the rotary shaft 22, and is provided on the side where the opposed rotary blades 23 do not exist in the flat plate portion 24a.
As a result, a case 26 that houses a set of two rotary blades 23 is constituted by two scrapers 24 adjacent to each other in the extending direction of the rotary shaft 23.

The scraper 24 is made of a resin material. The scraper 24 here is an injection molded product using polyacetal (POM) which is a low friction resin material. Thereby, it can control that the shredded refuse adheres to the rotary blade 23 and the scraper 24.
In particular, clogging of sticky material and debris at the entrance 26a portion of the cutter blade 23a to the case 26 is likely to occur. However, due to the formation of a fluorine layer on the rotary blade 23 and the scraper 24 of low-friction resin material, the entrance 26a That is, it can suppress.

(2-2) Straight Cutting Unit As shown in FIG. 3, the straight cutting unit 3 includes a pair of rotating shafts 32 that are rotatable and supported in parallel, and each rotating shaft 32 is spaced in the tube axis direction. And a plurality of rotary blades 33 disposed in the middle. The pair of rotating shafts 32 are driven by the drive unit 4. The rotary blade 33 here has a cutter blade 33a at the outer periphery. A pair of rotary blades 33 provided on each rotary shaft 32 are adjacent in the axial direction, and the sheet-like material is cut by the adjacent rotary blades 33.

(3) Drive Unit The drive unit 4 includes a drive motor 41 and drive transmission means (for example, a gear) that transmits the rotational drive of the drive motor 41 to the rotary shafts 22 and 32.

(4) Sensor or the like The sensor 81 detects, for example, that the sheet passes through the guides 61c and 61d. The sensors 81 are arranged between the sheet inlet 61a and the shredding unit 2 and between the inlet 61b and the shredding unit 3, respectively. For example, there are guides 61c and 61d in the arrangement positions. As the sensor 81, for example, a transmission type having a light emitting unit and a light receiving unit facing each other can be used. The detection signal of the sensor 81 is output to the control unit 5 as shown in FIG. The signal line is indicated by a line segment with an output destination as an arrow.

The ammeter 84 detects the drive current supplied to the drive motor 41 and outputs it to the control unit 5. In addition, when the drive current supplied to the drive motor 41 increases, it is a case where the rotational load of the rotary blades 23 and 33 of the shredding units 2 and 3 increases, and the sheet is overloaded or the sheet is shredded. It occurs when the units 2 and 3 are clogged.
The torque meter 85 detects the rotational drive torque of the drive motor 41 and outputs it to the control unit 5. The increase in the torque of the drive motor 41 occurs, for example, when the sheet is overloaded or the sheet is jammed in the shredding units 2 and 3.

(5) Power Supply Unit As shown in FIG. 4, the power supply unit 7 uses, for example, a conversion circuit 71 that smoothes commercial power received from the commercial power supply 70 and converts it into DC power, and uses the converted DC power. And an inverter 73 that generates drive power in accordance with an instruction from the control unit 5. The drive power (drive current) generated by the inverter 73 is supplied to the drive motor 41.
When the power switch 83 (see FIG. 1) is turned on, the power unit 7 receives power from the commercial power source 70 and supplies operating power to the control unit 5, sensor 81, ammeter 84, torque meter 85, error indicator lamp 86b, and the like. To do. The power supply line is indicated by a line segment and is distinguished from a signal line indicated by an arrow line segment.

(6) Control unit The control unit 5 performs the following control.
The control unit 5 controls the power supply unit 7 so as to increase the drive current when the torque of the drive motor 41 is increased. The control unit 5 includes a table in the ROM 52 that associates the torque of the drive motor 41 with the drive current, and instructs the power supply unit 7 to generate a drive current based on the measurement result of the torque meter 85.
The control unit 5 performs the shredding process by rotating the drive motor 41 in the forward direction when the sheet is loaded from the loading ports 61a and 61b. The control unit 5 performs clogging elimination processing when the sheet being shredded is excessively charged. Here, when the sheet is not overfilled, the shredding process performed by rotating it forward is called “normal shredding process”, and the shredding during the clogging elimination process performed at the time of overfeeding is called “forced shredding”, and the clogging elimination process The forced shredding process is referred to as “forced shredding process”.

  Overloading is a case where a load is applied to the drive motor 41 so as to exceed the normal shredding capability in the normal shredding process. Specifically, when the drive current value I of the drive motor 41 that is being shredded becomes equal to or greater than the current value I2, it is determined that the input is excessive. Thereby, it is possible to determine overloading without newly providing a determination unit for determining whether or not the loaded sheet is overloaded.

  The clogging elimination process is a process in which the forward rotation drive and the reverse rotation drive of the rotary blade 23 (drive motor 41) are alternately performed one or more times. Thereby, there are an operation in which the sheet-like material bites into the chopped portion by the forward rotation of the rotary blade, and an operation in which the sheet-like material is returned by the reverse rotation of the rotary blade and the bite of the sheet-like material by the chopped portion is eliminated. It is carried out alternately and continuously. The reverse rotation mainly has a discharging function, but the reverse rotation is also included in the shredding process.

The reversal between the forward rotation drive and the reverse rotation drive is performed when the load of the drive motor 41 reaches a certain value, specifically, when the drive current value I becomes equal to or greater than the current value I2. As a result, it is possible to efficiently perform shredding while reducing the load on the drive motor 41, rather than reversing each rotation for a predetermined rotation time.
The control unit 5 detects (monitors) the drive current even during the rotation drive in the clogging elimination process, and the drive current value does not reach the current value I2 and the drive current value during the forward rotation drive or the reverse rotation drive. When I becomes less than the current value I1, the clogging elimination process ends. Thereby, it is possible to prevent the rotary blade 23 from rotating even though the sheet is shredded or discharged.

The control unit 5 performs a cleaning process when it is time to clean the shredding unit 2.
As shown in FIG. 4, the control unit 5 is constituted by a microcomputer including a CPU 51, a ROM 52, a RAM 53, and the like. The control unit 5 includes a counter 54. The control unit 5 operates by receiving power from the power supply unit 7 by operating the power switch 83.
In the control unit 5, the CPU 51 performs at least the above control while using the RAM 53 as a work area based on programs and data stored in the ROM 52.

2. Operation of Drive Motor The shredder 1 performs a normal shredding process for shredding a sheet and a clogging eliminating process when a sheet being shredded is excessively charged. Hereinafter, the fluctuation of the drive current value I of the drive motor 41 during the shredding process will be described.

(1) Normal shredding process Normal shredding process is demonstrated using FIG.
In FIG. 5, a case where there is no over-charging is indicated by a solid line, a case where over-charging is indicated by a broken line, and a portion where the solid line and the broken line match is indicated by a solid line. Note that the loading of a sheet that is not overloaded is referred to as “normal loading”.

(1-1) Normal Input Normal input normal shredding processing will be described with a solid line in FIG.
When the sensor 81 detects the loading of the sheet (it is “T0” in the figure), the drive motor 41 starts to rotate forward. The power supply unit 7 generates and supplies a drive current so that the drive current value I becomes the current value I1 before the sheet reaches the shredding unit 2 (indicated by “T1” in the drawing).
When the sheet reaches the shredding unit 2 (indicated by “T2” in the figure), the drive current increases as the rotational load increases due to shredding, and eventually the drive current value I becomes constant at the current value I3 (FIG. "T3" in the middle). When a constant current is maintained for a while and all the shredding of the sheet is completed (indicated by “T4” in the figure), the drive current value I decreases to the current value I1, and then the drive motor 41 stops ( "T5" in the figure). The constant current value I3 varies depending on the inserted sheets, but is approximately the same value in the case of sheets having the same thickness. The rated current value here is a current value corresponding to the number of sheets with a shredding rate of 90 [%] or more.

(1-2) Overloading The normal shredding process for overcharging will be described with a broken line in FIG.
The over-throwing normal shredding process is the same as the normal-throwing normal shredding process until time T is “T2”. For this reason, the time T after “T2” will be described.
The drive current increases as the rotational load increases due to shredding, and when the drive current value I exceeds the rated current value I3 and reaches the current value I2 ("T6" in the figure), the drive motor 41 is forcibly stopped. (Supply is stopped from the power supply unit 7).
When the drive motor 41 is forcibly stopped, a part of the sheet exists in the shredding unit 2 and the sheet is jammed. This state is also referred to as a “clogged state”.

(2) Clogging elimination processing When the sheet becomes clogged due to overloading, the shredder 1 performs clogging elimination processing. Changes in the drive current value I during the clogging elimination process will be described with reference to FIGS.
In the forced shredding shown in FIG. 6, the fluctuation of the drive current is indicated by a right triangle. This is because the sheet exists in the shredding unit 2 (the sensor 81 is in the ON state), and the time T1 and the time T2 in FIG.

As shown in FIG. 6, the clog elimination process is a process in which the drive motor 41 (the rotary blade 23) is alternately rotated in the reverse direction and the normal direction.
In the jammed sheet 100, first, as shown in FIG. 7A, the thin portion 100a of the sheet 100 exists in a short region in the sheet conveying direction. However, by alternately repeating forward rotation and reverse rotation of the drive motor 41 (the rotary blade 23), as shown in FIG. 7B, the thin-walled portion 100a gradually spreads in the transport direction, and further the sheet 100 It becomes thinner and more likely to be shredded. Thereby, the clogged state of the sheet is easily eliminated.

  The clogging elimination process is automatically performed until alternating shredding by reverse rotation and forward rotation continues for a total of K times (for example, 10 times). Thereby, the clogged state of the sheet can be automatically removed, and the shredder 1 which is less likely to be clogged is obtained. In addition, since reverse rotation and forward rotation are alternately performed a plurality of times, no user operation is required during the process, and the clogging elimination process can be performed efficiently.

Switching between reverse rotation and forward rotation is the timing at which the drive current value I reaches the current value I2. Note that the current value I2 is the same as the current value I2 that is the threshold value of the drive current value when it is determined that there is an excessive charge in the above-described normal shredding process.
FIG. 6A shows a case where all the sheets are shredded during the second forced shredding. FIG. 6B shows a case where the clogging is performed K times and the clogging state is not eliminated. As will be described later, whether or not all of the sheets are shredded or whether or not the sheets are discharged is, for example, set to the current value I1 without the drive current value I of the drive motor 41 reaching the current value I2. Judgment is based on whether or not it has decreased.

  Further, the current value I2, which is a criterion for reversing the rotation, is in the range of 1.5 times to 3.0 times the rated current value I3 possessed by the apparatus. Thereby, even when the sheet is excessively charged, the sheet can be shredded by the clogging elimination process.

3. Flowchart of Control Unit The main process and sub-process of the control unit 5 that performs the above-described normal shredding and forced shredding will be described with reference to the flowcharts of FIGS.
(1) Main process The main process of the control unit 5 will be described with reference to FIG.
When the power switch 83 is turned on, the control unit 5 receives power from the power supply unit 7 and starts the program.
When the sheet is loaded from the loading slot 61a and the sensor 81 detects the sheet (“Yes” in S1), the control unit 5 sets F1 = 0 (S2), and then rotates the rotary blade 23 forward (S3). ).
The forward rotation is performed by the control unit 5 instructing the power supply unit 7 to supply a drive current to the drive motor 41. As will be described later, F1 is a variable indicating whether shredding has started.

In step S4, the control unit 5 performs an overload determination process for determining whether or not the sheet has been overloaded. If the sheet is normally loaded, the control unit 5 determines whether or not the sheet shredding has been completed. A determination process is performed (S5). As a result of the end determination process, when shredding is continued without being finished, the process returns to step S4, and when shredding is finished, the rotation of the rotary blade 23 is stopped (S6).
The rotary blade 23 is stopped when the control unit 5 instructs the power supply unit 7 to stop supplying drive current to the drive motor 41. Further, the process from the start of shredding from the forward rotation in step S3 to the end of shredding in step S6 is a case of normal input indicated by a solid line in FIG.

In step S7, the control unit 5 determines whether or not the variable n indicating the number of shredded sheets (number of processes) is greater than the set value n1, and if the variable n is greater than the set value n1 (“Yes”). Then, a cleaning process is performed (S8). If the variable n is smaller than the set value n1 ("No"), the number of sheets to be cleaned is not reached, "1" is added to the variable n (S11), and the process returns to step S1.
The cleaning process is for removing sheet scraps and adhesives attached to the rotary blade 23 and the scraper 24 of the shredding unit 2.

In step S9, the control unit 5 determines whether or not the variable L indicating whether or not a new sheet is input during the cleaning process is “1”. If the variable L is “1” (“Yes” ”), The process returns to step S3, and the loaded sheet is shredded.
When the variable L is not “1” (that is, “L = 0”) (“No” in step S9), the cleaning process is completely completed, and the variable n is set to “0” (S10). Return to step S1.

  If the control unit 5 determines that the overload is detected in the overload determination process in step S4, the control unit 5 performs a jam clearing process (S12), and whether or not all of the sheets are shredded or the sheets are discharged by the jam clearing process. When the variable M indicating “0” is “Yes” in step S13 and is in the state of FIG. 6B, “indicating that the sheet is jammed in the shredding unit 2” Is performed (S14). Note that “that is, display” is performed by the control unit 5 lighting the error indicator lamp 86b. Note that when the variable M is “0”, for example, as shown in FIG. 6B, the shredding of all sheets has not been completed or has been forcibly terminated without being discharged, and the jammed state has been resolved. If not.

  In step S13, when the variable M is not “0” (that is, “M = 1”) (“No”), the process returns to step S1 and waits for the insertion of a new sheet. Note that the case where the variable M is not “0” is, for example, when the sheet is discharged or when all the sheets are shredded (see FIG. 6A), and when the jammed state is resolved.

  In step S15, the control unit 5 waits for a button operation from the user. If there is a button operation (“Yes”), the control unit 5 hides “that is, display” (S16), and returns to step S1. The non-display is performed by turning off the error indicator lamp 86b.

(2) Sub-Processing (2-1) Overload Determination Process The overload determination process will be described with reference to FIG.
When the overload determination process starts, the control unit 5 detects the drive current value I supplied to the drive motor 41 by the power supply unit 7 (S101), and the detected drive current value I is equal to or greater than the current value I2. Is determined (S102). The drive current value I is detected by an ammeter 84, and the detected value is input to the control unit 5 (see FIG. 4).

In S102, when the drive current value I is equal to or greater than the current value I2 ("Yes"), the control unit 5 determines that it is excessively charged (S103), stops the rotation (S104), and the main unit shown in FIG. Return to processing.
When the drive current value I is smaller than the current value I2 ("No"), it is determined that the drive current value is normal (S105), and the process returns to the main process shown in FIG.

(2-2) End Determination Process (2-2-1) Determination Method First, fluctuations in the drive current value will be described with reference to FIG.
In normal shredding, when the drive current value I is lower than the current value I1, it is determined that the shredding is not performed, and when the drive current value I is greater than the current value I1, it is determined that shredding is being performed.
Here, the state in which the drive current value I is smaller than the current value I1 is a state after the sheet is detected and the drive current value I has not reached the current value I1 (this state is referred to as “state before shredding”). And a state in which shredding is completed (this state is referred to as a “state after shredding”).

The state before shredding and the state after shredding can be distinguished by whether or not there is a state in which the drive current value I is larger than the current value I1 before the drive current value I becomes smaller than the current value I1. That is, it can be determined by whether or not shredding has started. Accordingly, a variable indicating whether or not shredding has been started before the drive current value I becomes smaller than the current value I1 is “F1”, and a variable indicating whether or not shredding is performed.
When the variable F1 is “0”, the state before the shredding is started, and when the variable F1 is “1”, the shredding is started.

(2-2-2) Processing The end determination processing will be described with reference to FIG.
When the end determination process starts, the control unit 5 determines whether or not the variable F1 indicating the presence or absence of shredding is “0” (S111). When the variable F1 is “0” (“Yes”), it is determined whether or not the drive current value I is larger than the current value I1 (S112).

When the drive current value I is larger than the current value I1 ("Yes"), the shredding is in progress and the variable F1 is set to 1 (S113), and it is determined that shredding continues (S114). Returning to the main process shown in FIG.
If the drive current value I is not greater than the current value I1 in step S112 ("No"), it is a state before shredding, and it is determined that shredding continues because the sheet will be sent in the future. The process proceeds to step S114.

In step S111, the control unit 5 determines whether or not the drive current value I is equal to or less than the current value I1 when the variable F1 is not “0” (“No”), that is, when the variable F1 is “1”. Is determined (S115).
When the drive current value I is not less than or equal to the current value I1 (“No”), the cutting is in progress and the process proceeds to step S114.
When the drive current value I is equal to or smaller than the current value I1 ("Yes"), the shredding has been completed, and the process proceeds to step S116 where it is determined that shredding has been completed. 0 ”(S117), the process returns to the main process shown in FIG.

(2-3) Clogging removal processing The forced crushing processing of clogging removal processing is processing in which the processing at the time of overloading in the shredding processing shown in FIG. 5 is performed alternately and continuously for forward rotation and reverse rotation of the rotary blade 23. It can also be said.
This will be described with reference to FIG.
When the clogging elimination process starts, the control unit 5 sets the variable k indicating the number of forced shredding to “1” (S121), and sets the variable F2 indicating whether or not the forced shredding has started to “0” (S122). ). The variable F2 is a variable corresponding to the variable F1 in the main process (FIG. 8). “0” indicates that forced shredding has not started, and “1” has started forced shredding. Show the case.
In step S123, the control unit 5 determines whether or not the variable k is an odd number. If the variable k is an odd number (“Yes”), the control unit 5 reversely rotates the drive motor 41 (S124). ”) Rotates the drive motor 41 forward (S125).

  In step S126, the control unit 5 detects the drive current value I and determines whether or not the detected drive current value I is equal to or greater than the current value I2 (S127). When the drive current value I is equal to or greater than the current value I2 (“Yes”), the rotation is stopped (S128).

In step S129, the control unit 5 determines whether or not the variable k is “K” or more. “K” is the total number of forced shredding processes performed during the clogging elimination process.
When the variable k is not “K” or more (“No”), “1” is added to the variable k (S130), and the process returns to step S122. When the variable k is “K” or more (“Yes”) (Yes), the variable M indicating the end state of the clogging elimination process is set to “0” (S131), and the process returns to the main process shown in FIG.
Note that when the variable M is “0”, the sheet remains in the shredding unit 2 even after the clogging elimination process is performed, and the clogging of the sheet is not eliminated.

If the drive current value I is not equal to or greater than the current value I2 in step S127 (“No”), the control unit 5 determines whether the variable F2 is “1” (S133).
If the variable F2 is “1” (“Yes”), it is determined whether or not the drive current value I is less than the current value I1 (S134). If the drive current value I is less than the current value I1 (“Yes”), the variable M indicating the end state of the clogging elimination process is set to “1” (S135), and the process returns to the main process shown in FIG.
When the variable M is “1”, as described above, all the sheets are shredded (in the case of normal rotation) or discharged to the inlet 61a side (in the case of reverse rotation) during the clogging elimination process. ) To indicate that the sheet is not jammed. When the sheet is discharged, the sheet is detected and shredded in step S1 of the main process (FIG. 8).

  If the variable F2 is not “1” (“No”) in step S133, the control unit 5 determines whether or not the drive current value I is equal to or greater than the current value I1 (S136). When the drive current value I is equal to or greater than the current value I1 (“Yes”), the variable F2 is set to “1” (S137), the process returns to step S126, and the drive current value I is less than the current value I1 (“ No ”), the process returns to step S126.

(2-4) Cleaning Process The cleaning process will be described with reference to FIG.
In the cleaning process, the forward rotation of the rotary blade 23 for a predetermined time (Tc) and the reverse rotation of the predetermined time are alternately performed a predetermined number of times (here, “J” times). Here, forward rotation and reverse rotation are continuously performed.
When the cleaning process starts, the control unit 5 sets a variable j indicating the number of cleaning processes to “0” (S141), determines whether the variable j is an odd number (S142), and if it is an odd number (“Yes” "") Reversely rotates the drive motor 41 (S143), and in the case of an even number ("No"), the drive motor 41 is rotated forward (S144).
In step S145, the control unit 5 sets the count value C to “0” and starts the counter.

In step S146, the control unit 5 determines whether or not a sheet put in during cleaning is detected. If not detected (“No”), whether or not the count value C is equal to or greater than Tc. Is determined (S147).
In step S147, if the count value C is not equal to or greater than Tc (“No”), the control unit 5 returns to step S146, and if the count value C is equal to or greater than Tc (“Yes”), stops the rotation. (S148), "1" is converted into the variable j (S149).

In step S150, the control unit 5 determines whether the variable j is “J” or more. If the variable j is not “J” or more (“No”), the control unit 5 returns to step S142, and the variable j is “J”. ”Or more (“ Yes ”), the variable L is set to“ 0 ”(S151), and the process returns to the main process shown in FIG.
Note that when the variable L is “0”, it indicates that the cleaning is completed without the sheet being loaded during the cleaning process.

When the control unit 5 detects a sheet fed during cleaning in step S146 (“Yes”), the control unit 5 stops the rotation of the drive motor 41 (S153), and sets the variable L to “1” (S154). ), The process returns to the main process shown in FIG.
Note that a variable L of “1” indicates that a sheet has been loaded during the cleaning process.

<Second Embodiment>
In the first embodiment, if there is an excessive input of sheets in the normal shredding process, the clogging eliminating process is automatically performed. That is, the process automatically shifts from the normal shredding process to the clogging eliminating process without requiring any user operation.
In the second embodiment, when there is an excessive input in the normal shredding process, a discharge process for discharging the sheet is performed, and when the sheet cannot be discharged, the user issues an instruction to perform the clogging elimination process. When there is a clogging, the clogging elimination process is performed.

In the second embodiment, as shown in FIG. 21A, there is no operation button for manually rotating the shredding units 2 and 3, but a power switch 83 and an operation button 182a for clogging elimination processing. Is provided. The reset function when the clogged state is displayed is also shared by the power switch 83. As a result, the number of operation buttons can be reduced, and the user can easily operate.
Hereinafter, the control unit according to the second embodiment will be described.

1. Regarding the Discharging Process The discharging process is a process of rotating the rotary blade 23 of the cross shredding unit 2 in the sheet discharging direction. The sheet discharge direction is the reverse rotation direction. The discharge process ends when the drive current value I becomes equal to or greater than the current value I2. In other words, the current value I2 is also a criterion for overloading and can be implemented without providing a new criterion.

2. The contents of control will be described with reference to FIG.
When a sheet is loaded, a normal shredding process for rotating the rotary blade 23 forward is performed as in the first embodiment, and it is determined that the loaded sheet is overloaded (the drive current value I is a current value). When it becomes I2 or more, the normal shredding process is terminated (“2T1” in FIG. 13). Thereafter, in order to discharge the jammed sheet from the input port 61a, a discharge process of rotating the rotary blade 23 in reverse is performed.
When the sheet is discharged by the reverse rotation of the rotary blade 23, as shown in FIG. 13A, the driving current value I starts to decrease before reaching the current value I2, and becomes smaller than the current value I1 (FIG. 13). "2T2" in the middle).

  On the other hand, when the sheet is not discharged by the reverse rotation of the rotary blade 23, as shown in FIG. 13B, when the drive current value I reaches the current value I2 (“2T3” in FIG. 13), End the discharge process. Then, when the user inputs an operation button for executing the clogging elimination process (“2T4” in FIG. 13), the clogging elimination process is started.

3. Flowchart of control unit (1) Main process The main process of the control unit according to the second embodiment is the addition of a discharge process to the main process of the control unit 5 of the first embodiment shown in FIG. The clog elimination process of the embodiment is the same as the main process of the control unit 5 according to the first embodiment except that the clog elimination process of the second embodiment is replaced with the clog elimination process of the second embodiment.
That is, in the main process of the control unit of the second embodiment, after the over-throw determination process in step S4 in FIG. 8 is determined to be over input, the processes in steps S201 to S204 shown in FIG. 14 are performed. In step S12, the clogging elimination process replaces the clogging elimination process in step S205 shown in FIG. 14. Here, only characteristic processing different from that in the first embodiment will be described.

  When it is determined in step S4 in FIG. 8 that the control unit is overcharged, the control unit performs the discharging process as shown in FIG. 14 (S201), and determines whether or not the variable P is “0”. The variable P is a variable indicating a sheet discharge state. When the variable P is “0”, the variable P is not discharged. When the variable P is “1”, the sheet is discharged. When the sheet is discharged, the sheet is detected and shredded in step S1 of the main process (FIG. 8).

  In step S202, the control unit returns to step S1 in FIG. 8 when the variable P is not “0” (“No”), and clogs when the variable P is “0” (“Yes”). Display is performed (S203), and when the user inputs a button operation for executing clogging elimination processing (“Yes” in S204), clogging elimination processing is performed (S205), and the process proceeds to step S13 in FIG. .

(2) Sub-process (2-1) Discharge process The discharge process will be described with reference to FIG.
When the discharge process starts, the control unit sets a variable F3 indicating whether or not the discharge process is started to “0” (S211), and reversely rotates the drive motor 41 (the rotary blade 23) (S212).
In step S213, the control unit detects the drive current value I, and determines whether or not the detected drive current value I is equal to or greater than the current value I2 (S214). When the drive current value I is equal to or greater than the current value I2 (“Yes”), the rotation of the drive motor 41 is stopped (S215), and the variable P indicating the discharge state is set to “0” (S216), as shown in FIG. Return to the main process.

If the drive current value I is not equal to or greater than the current value I2 in step S214 (“No”), the control unit determines whether the variable F3 is “1” (S217).
When the variable F3 is “1” (“Yes”), it is determined whether or not the drive current value I is less than the current value I1 (S218). When the drive current value I is less than the current value I1 (“Yes”), the variable P indicating the discharge state is set to “1” (S219), and the process returns to the main process shown in FIG.

  If the variable F3 is not “1” (“No”) in step S217, the control unit determines whether the drive current value I is equal to or greater than the current value I1 (S220). When the drive current value I is equal to or greater than the current value I1 (“Yes”), the variable F3 is set to “1” (S221), the process returns to step S213, and when the drive current value I is not equal to or greater than the current value I1 (“No” ”), The process returns to step S213.

(2-2) Clogging elimination process In the second embodiment, before the clogging elimination process is performed, a discharging process for rotating the rotary blade 23 in the reverse direction is performed. For this reason, as shown in FIG. 13B, the clogging elimination process of the second embodiment needs to start from the forward rotation, and this point is different from the clogging elimination process of the first embodiment.
The processing can be performed by determining whether or not “variable k is an odd number” in step S123 in FIG. 11 as “whether or not variable k is an even number”.

4). Others (1) The control unit determines the input of the button operation in step S204 of FIG. 14, but if there is no input of the button operation after a certain period of time, the process proceeds to step S205. Also good.
(2) The control unit determines the input of the button operation in step S204. For example, the control unit may directly proceed from step S202 to the clogging elimination process in step S205 regardless of the presence or absence of the button operation. In this case, the operation button 182a for clogging elimination processing may not be provided.

<Third Embodiment>
In the first embodiment and the second embodiment, the control unit 5 instructs the power supply unit 7 to generate the drive current of the drive motor 41 corresponding to each process. By mounting, the control unit may instruct the power supply unit to perform various processes. In this case, the control unit includes a power supply unit and a control unit.

1. Electrical Configuration The electrical configuration of the shredder according to the third embodiment will be described with reference to FIG.
The power supply unit 207 includes a conversion circuit 71, an inverter 73, a CPU 275, a ROM 277, and a RAM 279. The power supply unit 207 generates a drive current according to an instruction from the control unit 205 described later and supplies the drive current to the drive motor 41. That is, the power supply unit 207 generates and supplies a drive current corresponding to the process instructed by the control unit 205.
A microcomputer is configured by the CPU 275, the ROM 277, the RAM 279, and the like, and the CPU 275 performs various controls according to instructions of the control unit 205 while using the RAM 279 as a work area based on programs and data stored in the ROM 277. .

  The power supply unit 207 supplies operating power to the drive motor 41, the control unit 205, the sensor 81, the ammeter 84, the torque meter 85, the display unit 86 (see FIG. 1), the operation buttons 87, and the like. Measurement results are input to the power supply unit 207 from the ammeter 84 and the torque meter 85. Various power processing execution instructions are input from the control unit 205 to the power supply unit 207, and various processing execution results are input from the power supply unit 207 to the control unit 205.

  The control unit 205 controls the operation of the entire shredder. The control unit 205 includes a CPU 251, a ROM 253, a RAM 255, a counter 257, and the like, and the CPU 251, the ROM 253, and the RAM 255 constitute a microcomputer. Based on programs and data stored in the ROM 253 and the like, the CPU 251 instructs the power supply unit 207 to perform various processes and receives the results of the various processes while using the RAM 255 as a work area.

2. Process of Control Unit (1) Main Process The control unit 205 starts the program when the sensor 81 detects the loading of the sheet. Hereinafter, a description will be given with reference to the flowchart of FIG.
The control unit 205 instructs the power supply unit 207 to perform normal shredding processing and report the result (S201). In response to this, the power supply unit 207 performs normal shredding processing, and reports (outputs) the variable A indicating the shredding result to the control unit 205. The variable A is “0” when the sheet is normally loaded and all shredding of the sheet is completed, and “1” when the sheet is overloaded and the normal shredding process is forcibly terminated.

  When the variable A is “0” in Step 202 (“Yes”), the control unit 205 determines in Step S203 whether or not the variable n indicating the number of shredded sheets (number of processes) is larger than the set value n1. If the variable n is larger than the set value n1 (“Yes”), the power supply unit 207 is instructed to perform the cleaning process and report the result (S204). In response to this, the power supply unit 207 performs a cleaning process, and reports (outputs) a variable L indicating the cleaning result to the control unit 205. The variable L is “0” when the cleaning process is completed, and is “1” when a sheet is loaded during the process.

  In step S205, the control unit 205 returns to step S201 if the variable L is “1” (“Yes”). If the variable L is not “1” (“No”), the control unit 205 sets the variable n to “ 0 "(S206), and the process ends.

  If the variable n is not larger than the set value n1 (“No”) in step S203, the control unit 205 adds “1” to the variable n (S207) and ends.

  If the variable A is not “0” (“No”) in step S202, the control unit 205 instructs the power supply unit 207 to perform clogging elimination processing and report the result (S208). In response to this, the power supply unit 207 performs clogging elimination processing, and reports (outputs) the variable M indicating the forced shredding result to the control unit 205. Note that the variable M is “0” when the jammed state has not been eliminated, and “1” when all of the sheets are shredded or discharged (the jammed state is eliminated) during processing. It is.

In step S209, when the variable M is “0” (“Yes”), the control unit 205 turns on the error indicator lamp 86b to notify clogging (S210). If the operation button 87 is operated in step S211 (“Yes”), the error indicator lamp 86b is turned off (S212), and the process is terminated.
The control unit 205 ends when the variable M is not “0” (“No”) in step S209.

(2) Sub-processing Since the normal shredding process instruction in step S201, the cleaning process instruction in step S204, and the clogging elimination process instruction in step S208 have the same flow, FIG. 18 will be described.
When the normal shredding process instruction process starts, the control unit 205 instructs the power supply unit 207 to perform the normal shredding process (S231).
In step S232, the control unit 205 waits for a report about the variable A from the power supply unit 207 ("No"), and if there is a report ("Yes"), returns to the main process in FIG. .

3. Power Supply Unit (1) Main Process The main process of the power supply unit 207 will be described with reference to FIG.
In step S251, the power supply unit 207 waits until there is an instruction from the control unit 205 ("None"). If there is an instruction ("Yes"), if the instruction content is normal shredding processing, The process proceeds to step S252. If the instruction content is a cleaning process, the process proceeds to step S253. If the instruction content is a clogging elimination process, the process proceeds to step S254.
When the corresponding process ends, the power supply unit 207 reports the resulting variable to the control unit 205 (S255), and returns to step S251.

(2) Sub-process The cleaning process and clogging elimination process are the same as those in the first embodiment. In other words, the cleaning process is the same flowchart as the cleaning process of FIG. 12, and the clog elimination process is the same flowchart as the clog elimination process of FIG.

Hereinafter, the subflow of the normal shredding process will be described with reference to FIG.
When starting the normal shredding process, the power supply unit 207 sets the variable F1 indicating the presence or absence of shredding to “0” (S261), and causes the drive motor 41 (rotating blade 23) to rotate forward (S262).

  In step S263, the power supply unit 207 detects the drive current value I and determines whether or not the detected drive current value I is equal to or greater than the current value I2 (S264). When the drive current value I is equal to or greater than the current value I2 (“Yes”), the rotation of the drive motor 41 is stopped (S265), the variable A is set to “0” (S266), and then the main process shown in FIG. Return to.

In step S264, the power supply unit 207 determines whether or not the variable F1 is “1” when the drive current value I is not equal to or greater than the current value I2 (“No”) (S267).
If the variable F1 is “1” (“Yes”), it is determined whether or not the drive current value I is less than the current value I1 (S268). When the drive current value I is less than the current value I1 (“Yes”), the variable A is set to “1” (S269), and the process returns to the main process shown in FIG.

  If the variable F1 is not “1” (“No”) in step S267, the power supply unit 207 determines whether the drive current value I is equal to or greater than the current value I1 (S270). When the drive current value I is equal to or greater than the current value I1 (“Yes”), the variable F1 is set to “1” (S271), the process returns to step S263, and the drive current value I is less than the current value I1 (“ No ”), the process returns to step S263.

<Others>
1. In the first and second embodiments, the shredding unit 2 corresponds to an example of a shredding part of the present invention, the drive unit 4 corresponds to an example of a drive part of the present invention, and the control unit 5 controls the control of the present invention. It corresponds to an example of a part.
The drive unit may include a connection unit connected to the shredding unit and a power unit that supplies power for driving the connection unit. In this case, the drive unit of the present invention is a drive unit. 4 and the power supply unit 7.
2. In the third embodiment, the control unit 205 and the power supply unit 207 correspond to an example of a control unit. However, as described above, if the drive unit includes the connecting unit and the power unit, the drive unit is configured by the drive unit 4 and the drive power generation unit (which is a conversion circuit and an inverter) of the power supply unit 207. It may be. Further, the control unit may be configured by a power supply control unit (CPU 251, ROM 253, etc.) of the power supply unit 207 and the control unit 205.

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

<Modification>
1. Cut section (1) In the embodiment, the cross cut unit 2 for cross cut and the straight cut unit 3 for straight cut are provided, but at least the cross cut unit 2 is sufficient. Is not necessary. The cross shredding unit 2 may be combined with other shredding units for cutting.
(2) In the embodiment, two types of cut type shredding units 2 and 3 are provided, but other cut types may be additionally provided. Although the cross shredding unit 2 is provided in the embodiment, a shredding unit of a cut type other than the cross cut that tends to cause the sheet to be jammed may be provided instead of the cross shredding unit 2. Examples of other cut types include spiral cut and micro cut.

(3) Although the control of the straight chopping unit 3 of the embodiment is not particularly described, for example, the control performed on the cross chopping unit 2 may be performed on the straight chopping unit 3, or the control unit 5 May perform part of the control (sub-processing) performed on the cross shredding unit 2 on the straight shredding unit 3, or control different from the control performed on the cross shredding unit 2 may be performed on the straight shredding unit. You may go to 3.
(4) The fluorine layer of the rotary blade 23 only needs to be present at least in a region in contact with the sheet. For example, the fluorine layer may be provided on the entire rotary blade.

2. The drive unit The drive unit includes a gear as a transmission means for transmitting the drive of the drive motor 41 to the shredding units 2 and 3, but the drive motor 41 is directly connected to the rotary shafts 22 and 32 of the shredding units 2 and 2. You may connect.

3. Control unit (1) The control unit (the control unit 5 or the control unit 205 and the power supply unit 207) determines over-loading based on the drive current value of the drive motor 41. However, over-throw may be determined using other characteristic values or sensors. Other characteristic values include a torque value, a voltage value, a rotation speed, and the like of the drive motor. Examples of the sensor include a thickness sensor that measures the thickness of the sheet, a weight sensor that measures the weight of the sheet, and the like.
(2) The control unit (the control unit 5 or the control unit 205 and the power supply unit 207) performs reversal of rotation during forced shredding so that the drive current value I of the drive motor 41 is equal to or greater than the current value I2 (threshold value). Yes. However, the inversion timing may be performed based on a characteristic value corresponding to a rotational drive load. Examples of characteristic values corresponding to a rotational drive load include a torque value, a voltage value, and a rotational speed.

(3) The control unit normally counts the number of times the shredding process is performed by the program. For example, the control unit detects the passage of the sheet in the introduction path where the inserted sheet is guided to the shredding part. It is also possible to provide a sensor that performs detection, and the number of detections of the sensor may be the number of times of normal shredding processing.
(4) When the sheet is loaded during the cleaning process, the control unit stops the cleaning process. However, when a sheet is input during the cleaning process, the sheet that has been input after the cleaning process may be normally shredded, or after the cleaning process is temporarily interrupted and the sheet is normally shredded, The cleaning process may be continued (priority is given to the normal shredding process of the inserted sheet, and then the cleaning process is continued).

4). Operation Button In the second embodiment, as shown in FIG. 21A, the operation button 182a for clogging elimination processing is provided, and the manual operation button is not provided.
However, as shown in FIG. 21B, the power switch 83, operation buttons 282a and 282b for manually operating the shredding units 2 and 3, and an operation button 182a for clogging elimination processing are provided. Also good. The operation button 282a is for forward rotation, and the operation button 282b is for reverse rotation.
Further, as shown in FIG. 21C, a power switch 83 and operation buttons 282a and 282b for manually operating the shredding units 2 and 3 are provided, and the operation button 282a and the operation button 282b are simultaneously provided. By operating, it may function as an operation button for clogging elimination processing.

5. Various processes (1) In the normal shredding process, clogging eliminating process, and discharging process, shredding and discharging are completed when the drive current value I is equal to or greater than the current value I2. However, shredding and discharging may be terminated based on other criteria. Other criteria include the torque value, voltage value, rotational speed, etc. of the drive motor.
(2) The normal shredding process, clogging eliminating process, and discharging process are terminated when the drive current value I is equal to or greater than the current value I2. That is, the determination is made with one threshold. However, the threshold value may change depending on each process. For example, in the normal shredding process, a current value higher than the rated current value I3 and lower than the current value I2 may be set as a threshold value, and in the clogging elimination process and the discharge process, the current value I2 may be set as a threshold value.

(3) In the clogging elimination process, the first shredding process is reverse rotation in the first embodiment, and the first shredding process is forward rotation in the second embodiment. This is because the rotation direction of the shredding units 2 and 3 is in the normal / reverse order in a plurality of shredding processes including the normal shredding process and the discharge process.
Therefore, the clogging elimination process may be started from the forward rotation or the reverse rotation.
(4) When the clogging elimination process is started, the forward rotation and the reverse rotation may be performed alternately and continuously one or more times regardless of whether or not the user has operated (except for turning off the power switch 83). For example, the number of forward rotations may be ended in an odd number of times in total, that is, 5 times of forward rotation and 4 times of reverse rotation.
(5) When the process starts, the clogging elimination process may be performed by continuously rotating the rotating blade 23 in the normal direction and in the reverse direction until the cutting of the sheet is completed or until a predetermined number of times is performed. It may end in the first time including forward rotation and reverse rotation, may end in 6 times including forward rotation and reverse rotation, or may end in a predetermined number of times including forward rotation and reverse rotation. There is also.

(6) In the first embodiment, when it is determined that the battery is overloaded, the clogging elimination process is automatically performed. However, as in the second embodiment, the clogging elimination process may be performed after receiving an input from the user after it is determined that the input is excessive (no discharge process is performed).
(7) In the normal shredding process and clogging elimination process, when the driving current I of the drive motor 41 becomes less than the current value I2 in the state where shredding is started (in the case of F1 = 1, F2 = 1). The rotation is stopped when the shredding or discharging is finished. However, for example, a sheet is detected by a sensor arranged on the upstream side of the shredding units 2 and 3, and the rotation is stopped after a predetermined time has elapsed from when the sheet is no longer detected by the sensor. Also good. Note that the sensor 81 described in the embodiment can be used as a sensor, or another sensor may be provided.

(8) The sub-flowchart of the clogging elimination process in the embodiment is an example, and may be implemented by another flow. Another flow will be described with reference to FIG.
When the clogging elimination process starts, the control unit sets the variable k indicating the number of shredding processes to “1” (S301) and rotates the drive motor 41 forward (S302) to determine whether the drive current has increased. Determination is made (S303).
In step S303, when the current increases (“Yes”), the control unit determines whether or not the drive current value I is equal to or greater than the current value I2 (S304), and the drive current value I is the current. If the value is equal to or greater than I2 (“Yes”), the flag indicating forced stop is set to “ON” (S305), and the rotation of the drive motor 41 is stopped (S306).

In step S307, the control unit determines whether or not the current is decreasing. If the current is decreasing (“Yes”), the control unit determines whether or not the flag is “ON” (S308). When the flag is “ON” (“Yes”), “1” is added to the variable k (S309).
The control unit determines whether or not the variable k is equal to or greater than the shredding setting number K set in advance in the clogging elimination process (S310), and when the variable k is equal to or greater than the shredding setting number K (“Yes”). And return to the main process.

If the current does not increase in step S303 ("No"), the control unit proceeds to step S307. If the drive current value I is not equal to or greater than the current value I2 in step S304 ("No"), step S307. Proceed to
If the current does not decrease in step S307 (“No”), the control unit returns to step S303, and if the flag is not “ON” in step S308 (“No”), the control unit returns to the main process.
When the variable k is not equal to or greater than the shredding set number K in step S310 (“No”), the control unit turns “OFF” the flag (S311), reverses the rotation of the drive motor 41 (S312), The process returns to step S303.

6). Although the drive unit 4 of the embodiment of the unit (1) uses the gear as the drive transmission means, for example, the drive may be transmitted using a pulley and a belt.
(2) The drive unit 4 of the embodiment includes the drive motor 41 and drive transmission means. For example, the rotary shaft of the drive motor 41 and the rotary shafts 22 and 32 of the shredding units 2 and 3 are directly connected. You may make it do.
(3) In the first and second embodiments, the control unit 5 and the power supply unit 7 are described as separate bodies. However, for example, the control unit and the power supply unit may be configured integrally.

1 Shredder 2 Cross shredding unit 4 Drive unit 5 Control unit 7 Power supply unit

Claims (7)

A shredded portion having a rotary blade supported rotatably;
A drive unit that rotationally drives the rotary blade;
A control unit for controlling the drive unit,
The controller is
A normal shredding process in which the rotary blade is driven to rotate forward with respect to the sheet-like material charged in the shredded portion; and a normal rotation drive of the rotary blade with respect to the sheet-like material charged in the shredded portion; Perform clogging elimination processing that continuously performs reverse rotation drive,
A shredder that reverses the rotational direction of the rotary blade when the load of the rotary drive during the forward rotation drive or the reverse rotation drive during the clogging elimination process exceeds a threshold value. The controller performs a discharging process for driving the rotary blade to rotate in reverse before the clogging eliminating process,
The shredder according to claim 1, wherein the clogging elimination process is performed when the sheet-like material cannot be discharged from the shredded portion by the discharge process. The shredder according to claim 2, wherein the control unit performs the clogging elimination process when there is an operation input of an instruction to perform the clogging elimination processing. The control unit includes a counting unit that counts the number of times of performing the normal shredding process,
The said control part implements the cleaning process which performs the normal rotation drive and reverse rotation drive of the said rotary blade continuously, whenever the said frequency | count of a process reaches a setting value. Shredder. The shredder according to claim 4, wherein when the sheet-like material is input during the cleaning process, the control unit interrupts the cleaning process and performs the normal shredding process. The shredder according to any one of claims 1 to 5, wherein the rotary blade has a fluororesin layer in a region in contact with the sheet-like object. The shredded portion includes a pair of rotating shafts, a plurality of rotating blades, and a plurality of scrapers.
The plurality of rotary blades are attached to the rotary shaft at intervals along the tube axis,
The shredder according to any one of claims 1 to 6, wherein the scraper is arranged between rotary blades attached at intervals and is made of a low friction resin material.

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