JP4567300B2 - Shredda - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a shredder that shreds a sheet-like material such as a paper sheet such as a used confidential document, and more particularly to an improvement of a shredder having an energy saving design of reducing power consumption when operation is stopped.
[0002]
[Prior art]
Generally, a shredder is a shredding mechanism that shreds a sheet-like material such as a paper sheet, and a shredding motor that drives the shredding mechanism based on electric power from a commercial power source (for example, single-phase 100V, 50 or 60 Hz). (For example, an induction motor) and a control device for controlling the shredding motor.
In this type of shredder, when there is no paper sheet to be shredded, etc., the sound and vibration generated from the shredding motor and shredding mechanism are reduced by switching to a low speed operation state or operation stop state. In many cases, a technique for effectively reducing power consumption is employed (see, for example, Patent Document 1).
[0003]
[Patent Document 1]
JP-A-2001-137737 (Embodiment of the Invention)
[0004]
[Problems to be solved by the invention]
However, in this type of shredder, since power is not supplied to the shredded motor when the operation is stopped, the power consumed by the shredded motor is certainly reduced. Since the method of monitoring whether or not was adopted, it was necessary to always supply power to the control device from the power supply device.
For this reason, even when the operation is stopped, it is not possible to avoid at least a situation where power is consumed by the control device, and it is difficult to completely reduce power consumption to zero.
[0005]
The present invention has been made in order to solve the above technical problem, and provides a shredder capable of realizing zero power consumption when the operation is stopped.
[0006]
That is, as shown in FIG. 1, the present invention includes a shredding mechanism 2 that shreds a sheet-like object 1, a drive source 4 that drives the shredding mechanism 2 based on electric power from a commercial power source 3, and shredding. A control device 5 that controls the drive source 4 by sending a control signal to turn on the power supply to the drive source 4 when the mechanism 2 is operating and to turn off the power supply to the drive source 4 when the shredding mechanism 2 is stopped; The power source device 6 rectifies the input voltage from the commercial power source 3 and supplies power to the control device 5, and is connected in series to the commercial power source 3 and the drive source 4, and the drive source 4 based on the control signal from the control device 5 A switch mechanism (not shown) for turning on / off the power supply to the power supply, and the shredding mechanism 2 connected in parallel with the switch mechanism, and when the shredding mechanism 2 stops operating under the condition that the operation standby state of the shredding mechanism 2 has continued for a certain period of time, Power supply from the commercial power supply 3 to the power supply device 6 The shut-off mechanism 7 that cuts off the power supply to the control device 5 by the power source device 6 and the switch mechanism are connected in parallel and in series with the shut-off mechanism 7, and the shut-off mechanism 7 works. And a return mechanism 8 for returning the power supply from the commercial power supply 3 to the power supply device 6.
FIG. 1 schematically shows that the shut-off mechanism 7 and the return mechanism 8 are connected between the power supply device 6 and the commercial power supply 3, and details of the connection relationship between the two will be described later. The embodiment will be described in detail.
[0007]
In such technical means, the sheet-like object 1 is intended to include a sheet (for example, an OHP sheet) made of a material other than paper in addition to a paper sheet.
The drive source 4 typically includes a motor, but also includes a shift actuator that linearly moves in combination with a transmission drive mechanism such as a link mechanism. The power supply to the drive source 4 may be based on the power from the commercial power supply 3, and includes not only AC power but also DC power that is used by rectification.
[0008]
Further, the control device 5 controls normal power supply to the drive source 4 based on input signals from various switches, various sensors, and the like, but includes a mode of controlling the operation mode of the drive source 4 and the like.
Furthermore, the power supply device 6 refers to a device that supplies power to the control device 5 instead of the power supply to the drive source 4. Moreover, although the power supply device 6 is usually equipped with a rectified power supply, it may be equipped with a battery power supply if necessary.
[0009]
Moreover, the interruption | blocking mechanism 7 needs to make the electric power supply to the control apparatus 5 by the power supply device 6 into 0 besides interrupting | blocking the electric power supply between the commercial power source 3 and the power supply device 6. FIG.
Here, “the power supply to the control device 5 by the power supply device 6 is zero” means that even if the power supply device 6 is mounted with a battery power supply in addition to the rectified power supply, The purpose is not to supply power.
[0010]
As a typical aspect of such a shut-off mechanism 7, there is one that shuts off the power supply from the commercial power supply 3 to the power supply device 6 under the condition that the control device 5 determines to stop the operation of the shredding mechanism 2. It is done.
At this time, the determination criterion for blocking the operation of the shredding mechanism 2 by the control device 5 may be appropriately selected. However, in the present invention, the operation standby state of the shredding mechanism 2 continues for a certain time or more. The shredding mechanism 2 is selected so that the shut-off mechanism 7 is activated when the operation is stopped .
[0011]
Further, when the shut-off mechanism 7 is activated, power supply from the power supply device 6 to the control device 5 is not performed. Therefore, in order to resume the operation of the shredder, the commercial power supply 3 for the power supply device 6 is activated after the shut-off mechanism 7 is activated. What is necessary is just to provide the return mechanism 8 with which the electric power supply from can be returned.
Here, the return mechanism 8 may be appropriately selected. However, from the viewpoint of simplifying the device configuration, a mode that also serves as the start switch of the power supply device 6 is preferable.
[0012]
Further, the return mechanism 8 can be provided with other functions.
For example, the return mechanism 8, the controller 5 power from the power supply device 6 is supplied to, and, in a situation where the control unit 5 has switched off mechanism so as to stop the operation of the shredding mechanism 2, chopped A mode in which a release mechanism for releasing the operation stop state of the mechanism is also used and a trigger for resuming the operation of the shredding mechanism 2 is given to the control device 5 can be cited.
In this case, the situation where the control device 5 stops the operation of the shredding mechanism 2 is when a high load is applied to the shredding mechanism 2 (when a sheet-like object 1 having a shredding capacity or more is inserted and set, or when a jam occurs) ) Or when the operation of the shredding mechanism 2 is stopped due to safety measures when the door is opened.
[0013]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, the present invention will be described in detail based on embodiments shown in the accompanying drawings.
FIG. 2A is a front explanatory view showing a first embodiment of a shredder to which the present invention is applied, and FIG. 2B is a plane explanatory view thereof.
In FIG. 2 (a), the top surface of the shredder body 20 is provided with a loading port 21 for loading paper sheets (sheet-like material) to be shredded. The loading port 21 is partitioned by a pair of guide chutes. The guide path 22 continues, and a shredding mechanism 23 is disposed obliquely below the lower end of the guide path 22.
[0014]
In the present embodiment, as the shredding mechanism 23, a pair of roll cutters 24, 25 are provided. The roll cutters 24, 25 are, for example, as shown in FIG. 2B, rotating shafts 24a, 25a. The disk-shaped cutter blades 24b and 25b are attached at equal intervals in the axial direction, and the cutter blades 24b and 25b are meshed with each other.
Further, a lateral cutter device 30 is provided at a position below the meshing portions of the roll cutters 24 and 25. The lateral cutter device 30 is opposed to, for example, a spiral cutter 31 having a spiral blade and the spiral cutter 31. Thus, the flat cutter 32 is fixedly arranged, and the paper sheets are shredded in the lateral direction.
[0015]
Further, reference numeral 40 denotes a shredding motor, which transmits a rotational driving force to the roll cutters 24 and 25 and the spiral cutter 31 by a drive transmission system such as a gear train (not shown).
In the present embodiment, when a paper sheet is inserted into the insertion slot 21, for example, an insertion slot sensor (not shown) detects this and automatically starts the shredding motor 40.
As a result, the roll cutters 24 and 25 and the spiral cutter 31 which are the shredding mechanism 23 are rotationally driven, and the inserted paper sheets are linearly formed, for example, in a line shape having a width of about 3 mm to 6 mm by the roll cutters 24 and 25. The paper sheets that have been chopped and linearly cut are guided into the transverse cutter device 30 and further shredded in the lateral direction by, for example, about 10 mm to 35 mm by the spiral cutter 31 and the flat cutter 32.
The paper sheets (chopped scraps) shredded in this way fall into a waste container 50 provided at the lower part of the shredder body 20.
[0016]
A shredder control system used in this embodiment is shown in FIG.
In the figure, reference numeral 60 denotes a commercial power source (for example, single phase 100V, 50 or 60 Hz), and reference numeral 40 denotes a shredding motor that drives the shredding mechanism 23 based on the power from the commercial power source 60. For example, the inverter power potential A motor is used.
Reference numeral 70 denotes a power supply device that rectifies an input voltage from the commercial power supply 60 to generate a DC voltage, and reference numeral 90 denotes power supplied from the power supply device 70 to control the shred motor 40 (for example, an inverter power potential motor). It is a control device.
[0017]
In the present embodiment, the power supply device 70 has a transformer 71 (including a primary coil 71a and a secondary coil 71b). After being transformed at a predetermined ratio by the transformer 71, the power supply apparatus 70 passes through a stabilization circuit (not shown). Electric power is supplied to the control device 90.
Here, the primary coil 71a of the transformer 71 is connected to the commercial power source 60, and a motor circuit comprising a shred motor 40 and a motor relay 41 that turns on / off the power supply to the shred motor 40 in parallel with the primary coil 71a. Is connected.
[0018]
Furthermore, a series circuit including a return switch 81 and a photocoupler 82 is connected in parallel with the primary coil 71a of the transformer 71. The return switch 81 is a switch element that can be manually turned on, and the photocoupler 82 detects the on / off state of the return switch 81 and sends this detection signal to the control device 90. In particular, in the present embodiment, the return switch 81 is a switch element for returning the power supply device 70 from OFF to ON, and also serves as a start switch when starting the shredder.
[0019]
Furthermore, a switching relay 83 is disposed between the primary coil 71a side wiring of the transformer 71 and the return switch 81 side wiring. This switching relay 83 has a normally closed first contact 83a at an intermediate portion between the return switch 81 and the photocoupler 82, and a second contact 83b on the primary coil 71a side wiring, and is a relay connection that operates during excitation. The two contacts 83a and 83b are switched by the piece 83c.
[0020]
The control device 90 includes a microcomputer such as a CPU, ROM, RAM, and input / output I / O. In addition to the detection signal from the photocoupler 82, the control device 90 is arranged in the shredder inlet 21 (see FIG. 2). Input port sensor 101 provided, stop switch 102 for stopping the operation of the shredder, overload sensor 103 for detecting whether or not the shred motor 40 is overloaded, a temperature sensor 104 for detecting overheating of the shred motor 40, a shredder The CPU 20 receives various input signals such as a door switch 105 for detecting the opening / closing of the door of the main body 20, and executes a control program (see FIGS. 4 to 7) pre-installed in the ROM by the CPU, and the motor relay 41 and the switching relay. A predetermined control signal (operation signal) is sent to 83 and the like.
[0021]
Next, the operation of the shredder according to the present embodiment will be described.
First, the shredder starting process as shown in FIG. 4 will be described. When the return switch 81 also serving as a start switch is turned on, the primary coil 71a of the transformer 71 is energized via the return switch 81 and the switching relay 83. The power supply device 70 is turned on.
In this state, power from the power supply device 70 is supplied to the control device 90, and the control device 90 starts up. Then, the control device 90 sends a control signal (operation signal) to the switching relay 83 immediately after startup, and switches the switching relay 83 from the first contact 83a to the second contact 83b (turns on the switching relay 83). As a result, even if the return switch 81 returns to the OFF position after the ON operation, the commercial power supply 60 stably supplies power to the primary coil 71a via the switching relay 83, so the power supply device 70 maintains the ON state.
[0022]
In this state, as shown in FIGS. 2 and 3, when the paper sheet is inserted into the insertion slot 21 of the shredder body 20, the control device 90 receives a paper detection signal from the insertion slot sensor 101 and receives a motor relay. 41 is turned on. Then, the shredding mechanism 23 is driven by the shredding motor 40, and paper sheet shredding processing is performed. When the paper shredding process is completed, the control device 90 stops supplying power to the motor relay 41, turns off the motor relay 41, and enters an operation standby mode.
[0023]
In particular, in the present embodiment, the control device 90 performs an operation stop process as shown in FIG.
That is, as described above, the control device 90 controls the shredding processing of the paper sheet using the detection signal of the insertion port sensor 101 as a trigger, and checks whether or not the operation standby time has elapsed for a certain period of time. Under the condition that the standby time has passed for a certain time, the transmission of the control signal (operation signal) to the switching relay 83 is stopped, and the switching relay 83 is turned off.
At this time, since the power supply from the commercial power supply 60 to the primary coil 71a of the transformer 71 is interrupted, the power supply device 70 is turned off, and the power supply from the power supply device 70 to the control device 90 is interrupted (of the control device 90). shut down). In this state, power is not supplied to the chopping motor 40 and the control device 90, so the power consumption in the shredder is zero.
In this state, in order to operate the shredder again, as shown in FIG. 4, it is only necessary to perform a power supply device return process similar to the shredder start-up process.
[0024]
Further, the control device 70 checks whether or not it is in the automatic operation stop state, and if this is the case, the motor relay 41 is turned off and the automatic operation is stopped.
As shown in FIG. 6, the automatic operation stop state here means (1) when the power supply 70 is restored, (2) when the stop switch 102 is turned on during shredding, and (3) during shredding. In order to detect the overload with the overload sensor 103 and eliminate the overload state, the shredding motor 40 is reversely rotated for a predetermined time to discharge and stop the paper sheets, and then, (4) shredding by the temperature sensor 104 After detecting the heat radiation of the motor 40 and stopping the operation due to the heat radiation, the situation such as (5) after opening and closing the door of the shredder main body 20 occurs, and furthermore when the paper is detected by the slot sensor 101 In this case, the control device 90 blinks, for example, a corresponding display lamp as the automatic operation stop display.
[0025]
Moreover, what is necessary is just to perform the cancellation | release process of an automatic driving | operation stop state as shown in FIG. 7 in order to cancel | release such an automatic driving | operation stop state.
In the present embodiment, the return switch 81 may be turned on as shown in FIG. At this time, power from the power supply device 70 is supplied to the control device 90, and the control device 90 recognizes the ON operation of the return switch 81 from the detection signal from the photocoupler 82, and uses this as a trigger to perform shredding. A restart instruction for restarting the shredding process by the mechanism 23 is given.
[0026]
Then, the control device 90 checks the output of the insertion port sensor 101 and releases the automatic operation stop state when it detects the absence of paper, and performs a shredable display such as “can be shredded”. . When paper is detected by the output of the insertion port sensor 101, it is necessary to perform paper removal processing.
As described above, when the automatic operation stop state canceling process is performed, a normal shredding process is performed thereafter.
[0027]
【The invention's effect】
As described above, according to the present invention, when the shredding mechanism operation is stopped under the condition that the operation standby state continues for a certain time or longer , the power supply from the commercial power supply to the power supply device is shut off by the shut-off mechanism, Since the power supply to the control device by the device is set to 0, for example, when the shredding mechanism operation is stopped in a situation where the operation standby state is long, it is possible to eliminate power consumption not only by the drive source but also by the control device. Thus, it is possible to reliably realize an energy saving design in which the power consumption when the shredding mechanism is stopped in a situation where the operation standby state is long is zero.
Furthermore, in the present invention, since the power supply from the commercial power source to the power supply device is restored by the return mechanism after the shut-off mechanism is activated, the operation of the shredding mechanism can be smoothly resumed.
In particular, in the present invention, the layout of the shut-off mechanism and the return mechanism and the switch mechanism for turning on and off the drive source of the shredding mechanism has been devised, so that the drive current for driving the shredding mechanism is used for the shut-off mechanism and the return mechanism. You can work without running.
[Brief description of the drawings]
FIG. 1 is an explanatory diagram showing an outline of a shredder according to the present invention.
2A is a front explanatory view of a shredder according to the embodiment, and FIG. 2B is a plan explanatory view thereof.
FIG. 3 is an explanatory diagram showing an overall configuration of a shredder control system according to the present embodiment;
FIG. 4 is an explanatory diagram showing an overview of shredder start-up processing and power supply device return processing in the present embodiment;
FIG. 5 is an explanatory diagram showing shredder operation stop processing in the present embodiment;
6 is an explanatory diagram showing factors that cause the automatic operation stop state of FIG. 5; FIG.
FIG. 7 is an explanatory diagram showing an automatic operation stop state release process in the present embodiment.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 ... Sheet-like material, 2 ... Shredding mechanism, 3 ... Commercial power supply, 4 ... Drive source, 5 ... Control device, 6 ... Power supply device, 7 ... Shut-off mechanism, 8 ... Returning mechanism

Claims (3)

A shredding mechanism for shredding the sheet-like material,
A drive source that drives the shredding mechanism based on power from a commercial power source ;
A control device for controlling the drive source by sending a control signal to turn on the power supply to the drive source during the shredding mechanism operation and to turn off the power supply to the drive source when the shredding mechanism operation is stopped;
A power supply device that rectifies an input voltage from a commercial power supply and supplies power to the control device;
A switch mechanism that is connected in series to the commercial power source and the drive source, and that turns on and off the power supply to the drive source based on a control signal from the control device ;
When the shredding mechanism operation is stopped under the condition that the shredding mechanism is connected in parallel with the switch mechanism and the operation standby state of the shredding mechanism has continued for a certain time or longer, the power supply from the commercial power supply to the power supply device is shut off, and the power supply device A shut-off mechanism for reducing power supply to the control device to zero;
And a return mechanism that is connected in parallel to the switch mechanism and connected in series to the shut-off mechanism, and after the shut-off mechanism is activated, the power supply from the commercial power source to the power supply device is restored. Shredder. The shredder according to claim 1, wherein
A shredder characterized in that the return mechanism also serves as a start switch of the power supply device. The shredder according to claim 1, wherein
The return mechanism releases the shunting mechanism's shutdown state when the power is supplied from the power supply to the control unit and the switch mechanism is turned off so that the control unit stops the shredding mechanism. A shredder that also serves as a release mechanism that provides a trigger for the control device to resume operation of the shredding mechanism.

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