JPS63218261A - Cutter - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION <Industrial Application Field> The present invention relates to a cutting machine equipped with a paper feeding mechanism and for cutting (shredding) documents.

<Prior Art> A cutting machine equipped with a paper feeding mechanism is disclosed in West German Patent No. 2214799.

According to the West German patent, the paper feed table on which documents are set is always urged by a spring in the direction in which the feed roller is provided, and the documents set (placed) on the paper feed table are The feed roller feeds the cutter in appropriate amounts in one direction.

The document fed to the cutter is cut into small pieces by the cutter.

<Problems to be Solved by the Invention> In the conventional structure described above, since the paper feed table is always urged in the direction of the feed roller by the elastic action of the spring, the document When setting the paper on the paper feed tray, the paper feed tray must be pushed down by hand, resulting in extremely poor operability.

In order to solve this problem, a structure has been proposed in which the paper feed table is moved by a motor, but in this structure, when a foreign object is caught in the paper feed table, the motor is overloaded. This caused a malfunction and was a problem in use.

<Means for Solving the Problems> In view of the above circumstances, the present invention provides a cutting means for cutting a document, a feeding means for feeding the document to the cutting means, and a document set on a paper feed table. a first
A cutting machine comprising a driving means and a second driving means for driving the feeding means, comprising a comparing means for comparing the voltage supplied to the first and second driving means with a predetermined voltage, and a comparing means for comparing the voltage supplied to the first and second driving means with a predetermined voltage; and control means for controlling the first and second drive means according to the comparison output.

<Operation> With this configuration, the cutting machine according to the present invention can detect abnormalities in each drive means with a simple configuration, and thereby the cause of failure of the device can be quickly determined.

<Example> Hereinafter, the configuration of the present invention will be explained with reference to the drawings.

FIG. 1 is a perspective view of a cutting machine according to an embodiment of the present invention, and FIG. 2 is a schematic sectional view of the cutting machine.

In the figure, 1 represents the main body of the cutting machine.

The cutting machine main body 1 has two paper feed ports, namely, a first paper feed port 2.
and a second paper feed port 3.

The first paper feed port 2 includes a paper feed tray 4 on which a discarded document is placed, and a paper feed tray cover 5 that covers the paper feed tray 4. A large amount of documents can be set on the first paper feed table 2,
In addition, cutter (cutting section) 6 cuts the set documents into appropriate amounts.
A feed roller 7 is provided to feed the paper into the paper sheets a and 6b.

As shown in the figure, the cutting section consists of a pair of rollers 6a and 6b, and the rollers 6a and 6b are rotated by the drive of a motor 8.

On the other hand, the second paper feed port 3 is used when cutting two to three sheets of documents. That is, when a document to be discarded by cutting is inserted into the second paper feed port 3, the cutters 6a and 6b sequentially cut the document.

Hereinafter, a paper feeding section including the feeding roller 7 and a feeding mechanism for feeding the set documents to the cutting sections 7a and 7b is composed of a first paper feeding section and the second paper feeding port 3. The paper feeding section is called a second paper feeding section.

As mentioned above, if there are two paper feed sections, the first paper feed section and the second paper feed section, while the document is being cut by the first paper feed section, if there is a document that needs to be cut urgently, For example, the paper is fed into the second paper feed section.

Further, in parallel with the cutting process from the first paper feeding section, urgent documents can also be cut.

In addition, when cutting continuous paper such as computer form paper, the set tables 10a and 10 supported by the support rod 9 are used.
Continuous paper is set on paper b, and the leading edge of the set continuous paper is fed into the second paper feed section to perform cutting processing.

The documents fed into the cutters 6a and 6b are stored in the lower part 11 of the main body after being cut. The lower part of the main body 11
The front door 12 of the machine has an openable structure, so that the shredded waste stored in the lower part 11 of the main body (more accurately, the bag provided in the lower part 11 of the main body) can be disposed of as appropriate. There is.

In the figure, 13 is an operation panel, and 14 is a display section for displaying the operating status of the cutting machine. Further, the paper feed tray cover 5 is provided with a window portion 15 made of a transparent member, so that even when the paper feed tray cover 5 is closed, the amount of documents set in the first paper feed portion is It can be seen from

A perspective view of the first paper feeding section is shown in FIG.

In the figure, reference numeral 16 is a DC motor, and the drive of the DC motor 16 is transmitted to the rotating shaft 18 through the reduction gear unit 17. Can rotate.

The paper feed tray 4 is provided with a recess 19 for reinforcement, and is further provided with an actuator 20 for detecting whether or not there is a document on the paper feed tray 4.

The drive of the DC motor 21 is transmitted to the rotating shaft 22 through a speed reduction mechanism (not shown).

A conveying roller 23 is fixed to the rotating shaft 22. Further, an arm 24 is freely attached to the rotating shaft 22.

A shaft 25 is attached to the other end of the arm 24, and feeding rollers 7 are provided at both ends of the shaft 25.

Further, since the rotational force of the rotating shaft 22 is transmitted to the shaft 25 via the belt 26, when the DC motor 21 rotates, not only the conveying roller 23 but also the feeding roller 7 rotates.

In the figure, reference numeral 27 is an actuator for detecting the top position of the document placed on the paper feed table 4. Further, 28 is a fixed guide that guides the document to the paper feed tray 4, and 29 and 30 are guides that guide the document set on the paper feed tray 4 to the cutting section.

Next, details of the paper feeding section and cutting section of the cutting machine of this embodiment will be explained using FIGS. 4 to 6.

Already available parts are given the same reference numerals.

In addition to the cutters 6a and 6b, guide plates 32 and 33 are fixed to the cutter fixing frame 31. This cutter fixing frame 31 is.

It is fixed to the lower unit 35 via vibration isolating rubber 34.

The paper feed frame 36 includes a rotating shaft 1 constituting a first paper feed section.
8, 22, guide 28, paper feed tray cover 5, guide 29.
30 etc. is attached. In addition, the paper feed frame 3
6 is attached to the lower unit 35 without using the vibration isolating rubber 34.

Here, the lower unit 35 is a wooden casing that surrounds a garbage bag (box) in six directions, and is provided with an openable door 12 in the front, and the cutter 6a, 6b is provided in the upper part for cutting. An opening 37 is formed through which the cut waste passes.

FIG. 4 shows the paper feed tray cover 5 in an open state. When the paper feed tray cover 5 is opened, the cover switch C
3W38 is turned OFF, and the paper feed table 4 moves downward. Since a protrusion 39 formed at one end of the arm 24 engages with the guide 17, the feed roller 7 is stopped at the position shown in the figure.

Others, switch 40. Switch 41. Switch 42.
A switch 43 and a switch 44 are provided.

The switch 40 is provided to detect whether a document is inserted into the paper feed port 3 or not.

Further, the switch 41 is connected to the guide 29 and the guide 30.
This is provided to detect whether or not there are cans or the like, that is, the presence or absence of documents on the conveyance path between the two.

Further, the switch 42 is provided to detect that the paper feed tray 4 is at the lowest position shown in FIG.

Furthermore, two switches 43 are provided to detect the presence or absence of documents on the paper feed tray 4.

Furthermore, the switch 44 is provided to detect the top position of a large amount of documents stacked on the paper feed tray 4.

FIG. 5 shows a state in which a large number (300 to 500) of cans 45 are set on the paper feed tray 4, and then the paper feed tray cover 5 is closed.

At this time, the top of the document 45 operates the actuator 27, and the paper feed table 4 rises until the switch 44 is turned on. Note that a spring 46 is attached to the lower part of the paper feed tray 4, but this is attached as an auxiliary device to reduce the power of the DC motor 16.

FIG. 6 shows a situation where there are several documents on the paper feed tray 4.

Here, in FIGS. 5 and 6, the feeding roller 7
As can be seen by comparing the positions of , the larger the amount of documents set, the higher the position of the feeding roller 7 becomes. This is because the height of the leading edge of the paper feed is used as a reference.

As is clear from the figure, the paper feed tray cover 5 is rotatable around the fulcrum 47, and the cover switch C3W38 is pressed on the side of the paper feed tray cover 5 where a portion of the cover is not formed. A member rug is provided. The pressing member 48 does not press the cover switch C3W38 when the paper feed tray cover 5 is open, and on the contrary, presses the cover switch C3W38 when the paper feed tray cover 5 is closed. Press.

FIG. 7 shows a control motor abnormality detection circuit and a power supply circuit for the cutter motor 8 for rotating the cutters 6a, 6b.

In the figure, 49 is an AC power supply, 50 is a main power switch, 51 is a transformer, 53 is a DC converter equipped with a stabilized power supply circuit for converting AC into DC, and 55 and 56 are respectively used to open the door 12. This is a switch for detecting the temperature rise of the cutter motor 8.

Further, in the figure, VFR and MRR are inverted signals of the cutter motor drive signal MFR and the cutter motor reverse rotation signal MRR, respectively.

Therefore, when MFR is @L'' and MRR is H'', the cutter motor 8 rotates forward; on the other hand, when MFR is @L'' and MRR is
When RR is 1L#, the cutter motor 8 rotates in reverse.

Further, the signal MI is transmitted to the cutter motor 8. This is a signal that becomes "H" when an overload is applied to the DC motor 16.21.

The current supplied to the cutter motor 8 is passed through the coil 20.
4 and converts it into a voltage using a current-voltage converter 200. The comparison circuit 201 compares the voltage with a reference voltage to determine whether the cutter motor 8 is overloaded.

On the other hand, a foreign object is caught in the paper feed tray, and the DC motor 16
If the paper feed tray does not move even after driving, the DC motor 16 is overloaded and the voltage supplied to the motor drops. This is because the voltage supplied to the DC motor 16.21 is converted from AC to DC only by the capacitor and is not stabilized.

Therefore, even if an overload is applied to the DC motor 21 rather than the DC motor 16, the voltage supplied to the motor will similarly drop.

The comparator circuit 202 determines whether the voltage VSE is below a reference voltage.

Then, the outputs of the comparison circuits 201 and 202 are output from the OR gate 2.
03 and its output is output as a signal MI.

In this way, the cutter motor 8 and the DC motor 1
If 6,211C overload is applied, the MI double signal “H”
” and the cutting operation stops.

To reset this, it can be achieved to reverse the cutter 8 by pressing the reverse key RVK.

In addition, in the same figure, 57, 58, 59 are normally open contacts, 6
1.62 is a normally closed contact.

Control of the position of the paper feed tray 4> When the paper feed tray cover 5 is open and there is no document on the paper feed tray 4, the cutter 6a,
It is controlled so that it descends both when 6b is reversed and when there is a paper feeding error.

In addition, when a document is set on the paper feed table 4, the uppermost part of the set document is controlled to rise until the actuator 27 is activated and the switch 44 is turned on. Ru.

<Drive control of cutter motor 8> When the switch 40 or the switch 44 is ON, and when the switch 40 or the switch 44 is OFF.
The cutter 6 until a certain period of time elapses after it becomes FF.
a+6b rotates. However, if an overload is applied to the cutters 6a, 6b during the cutting process, the cutters 5a, 5b stop rotating. In this state, for example, even if a document is inserted into the paper feed port 3, the cutters 6a and 6b do not rotate. In this case, the cutting process cannot be performed unless the reverse rotation switch is pressed once to reverse the cutters 6a and 6b. If the DC motor 16゜21 is overloaded, it will be handled in the same way.

Control of Feeding Mechanism> When the IC paper is set on the paper feed tray 4, the feed roller 7 and the conveyance roller 23 perform a feeding operation.

However, the paper feeding operation will be stopped in the following cases.

+11 If the document does not pass through the conveyance path held by the guides 29.30 even after a predetermined period of time has passed after the start of the paper feeding operation (!1) If the preceding document does not pass through the conveyance path held by the guides 29.30. Qiill If the following bamboo leaves do not pass through the conveyance path even after a predetermined period of time has elapsed after passing through the conveyance path, Qiill If there are no more documents on the paper feed table 4 <Parallel cutting process from two paper feed ports> The documents set on the paper stand 4 and the documents inputted from the paper feed port 3 are simultaneously passed through the cutter 6a,
A cutting process can be performed in step 6b.

Furthermore, even if the first paper feeding unit is unable to feed paper due to a paper feeding error or the like, if the switch 40 is turned on, the cutter 6a
, 6b are configured to rotate, so that cutting processing from the paper feed port 3 can be performed.

Next, control circuit diagrams for performing the above-described control are shown in FIGS. 8 to 14. The time chart of each circuit is 15th.
This is shown in Figures 1 to 18.

In the circuit shown in FIG. 8, 63 is a timer circuit, and the details of the timer circuit 63 are shown in FIG. Furthermore, the relationship between the input and output of the timer circuit 63 is shown in FIG. 19 (al.
, (shown in bl.

For example, as shown in FIG. 19 faJ, the input is for a predetermined time T.

If the level is ``L'', the output will be ``L'' until the input becomes ``H'' again after the predetermined time T1 has elapsed.
''. Also, as shown in the same figure (bl), the output remains "■" without changing.The predetermined time T1 is
4. Can be changed by selecting the capacitor 65.

Also, Figure 10 shows the switch BSW that detects when the cutting waste is full.
When the cutting waste is full, the switch BSW is ONL and the output of the inverter 66 is @H''
This is taken as the full signal FULL.

FIG. 11 shows the input circuit of the start/stop key STK.

In the figure, 67 is a J- flip-flop with a clock pulse input terminal, and when a rising signal is input to the CP terminal, its output Q is an inverted version of the previous output. However, when a rising signal is input to the preset input terminal PR, the output Q becomes “
H”.

Further, when a rising signal is input to the clear terminal CLR, the output Q becomes "L" regardless of the output state at that time, as described above.

The output Q of the flip roller 167 is assumed to be a PAUSE signal. Therefore, when no rising signal is input to the PR terminal and the CLR terminal, the PAUSE signal will be inverted every time the start/stop key is pressed.

FIG. 12 shows a circuit for stopping the cutting operation when a large amount of documents are fed into the cutters 6a, 6b and an abnormality occurs in the motors 8, 16, 20.

As mentioned above, the MI double signal, the motor 8, 16° 21
This is a signal that outputs 1H'' when an abnormality occurs in any of the above. At this time, the output 0VER signal of the NAND gate 71 becomes ``H#''. In this state, when the output of the NOR gate 72 becomes ``H'', the 0VER signal is output. The signal becomes L''.This N
The OR gate 72 receives a signal C responsive to the reverse rotation signal of the cutters 6a + 6b and a reset signal RESET generated when the main power is turned on.

Therefore, when the 0VER signal is "H", the reverse key RVK
When you press , the signal C outputs H'', so the output cuff 0 of the NAND gate becomes 'Hn, so the NAND gate)7
The output of 1 becomes 'L#.

FIG. 13 shows a circuit for generating a reset signal when the main power switch is turned on.

When the main power supply 50 is turned on, as is clear from the figure, the comparator 73 outputs a signal that becomes "Ln" for a fixed period of time after the power supply is turned on. This is taken as a RESET signal.

FIG. 14 shows a circuit for detecting the temperature rise of the motor 8.

When the door 12 is closed, the door switch 55
Since it is closed, the THP terminal outputs a voltage of about 24V. When the temperature of the motor 8 rises, the thermoswitch 56 opens, and the output voltage becomes OV.

Therefore, when the thermo switch 56 is opened, the output of the comparator 74 becomes 'H'.

Normally, the voltage divided by the resistors 75 and 76 is set to be smaller than 24V, so the comparator 7
The output of No. 4 becomes "L".

In addition, in the same figure, 75 to 112 are gate circuits, 1
13 is a normally open contact, 114 and 115 are changeover switches, 1
16 to 120 are timers.

Next, the operation of the above-mentioned control circuit will be explained using the time charts shown in FIGS. 15 to 18.

The time chart in FIG. 15 is 2. Time t1: Open the paper feed cover 5 (switch 3
8 is QFF).

Time t2: A discarded document is set on the paper feed tray 4 (the switch 43 is turned on).

Time t3: The paper feed tray cover 5 is closed (the switch 38 is turned on).

Start cutting at time t4 (switch 44 is ON)
.

Time t5: The paper feed tray cover 5 is opened during the cutting process (the switch 38 is OFF).

Time t6: After adding the discarded documents, the paper feed tray cover 5 is closed (the switch 38 is turned on).

Time t7: All discarded documents on the paper feed table 4 have been fed (the switch 43 is turned off).

Time t8: After a predetermined time has elapsed from time t7, the cutters 6a+6b stop, and the cutting process ends.

This represents the operation of

When the paper feed tray cover 5 is opened at time t, the output of the inverter 78 becomes 'L#. At time t2, when discarded documents are set on the paper feed tray 41C, the switch 4 is turned on.
3 is turned ON, and the output of the inverter 77 becomes H''.

At time t3, when the paper feed tray cover 5 is closed,
The output of the inverter 78 becomes H', and the AND gate 97
The output of the inverter 81 becomes H'' until the switch 44 becomes 0NIC, that is, the output of the inverter 81 becomes H''.
Since the output of the inverter 102 becomes "L', the normally open contact 113 is closed, the DC motor 16 is rotated forward, and the paper feed tray 4 is raised. At time t4, the paper feed tray 4 is raised. The top of the set document operates the actuator 27, turning on the switch 44, and the output of the inverter 81 becomes 'H'. And the inverter 110
The output and MFR both become "L", the DC motor 21 and the cutter motor 8 start rotating, and the document set on the paper feed tray 4 is cut.

During this cutting process, when the sheet feed tray cover 5 is opened at time t5, the output of the AND gate 97 becomes H'', and the outputs of the inverters 100 and 102 are changed to the switch 4.
The switching switch 114 remains 'L' until the switch 2 turns ON.
, 115 are switched, the DC motor 16 is reversed,
The paper feed table 4 descends to the lowest position.

When additional documents are added to the already set documents and the paper feed table cover 5 is closed at time t6 (the switch 38 is turned on), the inverter 102 outputs "L" until the switch 44 is turned on. Then, the paper feed table 4 rises and the cutting process is performed. At time t7C, when all the documents have been fed onto the paper feed tray 4, the switch 4 is turned off.
3 is 0FFL, and the output of the inverter 77 is L''.

Thereafter, after the time set by the timer 120 (approximately 3 seconds) has passed, the MFR becomes H'', and the cutters 6a and 6b continue to rotate until then.

In the time chart of FIG. 16, while the cutting process from the first paper feeding unit is continuing, the cutting process from the second paper feeding unit starts at time t1.

At time t1°, the above-described cutting process ends.

Time t13: Paper feeding trouble occurs in the first paper feeding section.

Time t, 4: 4th: Resume the cutting process from the paper section.

Time t, 5: The paper feed cover 5 is opened.

Time t16: The above cutting process ends.

It represents the time of.

During the cutting process from the first paper feed section, when a document is input from the second paper feed section (the paper feed port 3) at time t11, the switch 40 is turned on and the output of the inverter 82 is "H".
” becomes.

Then, the documents fed from the first paper feed section and the documents fed from the second paper feed section are simultaneously cut into the cutters 6a and 6b.
will be judged.

At time t12, cutting from the second sheet feeding unit ends.

At time t13Vc, when a paper feeding trouble occurs in the first paper feeding section, ERJ becomes "H", the output of the inverter 110 becomes "H", and the DC motor 21 stops (cutting from the first paper feeding section processing is interrupted).

In this way, when a paper feeding problem occurs in the first paper feeding section, the time [1
4, when a document is input from the second paper feed section (paper feed port 3), the output of the NOR gate 105 becomes "L" regardless of the output of the AND gate 104, so the MF
R becomes L'', the cutter motor 8 rotates, and cutting processing can be performed from the second paper feeding section.

At time t+5, when the paper feed tray cover 5 is opened,
ERJ becomes "L" and the trouble is cleared. Then, after removing the trouble and closing the paper feed tray cover 5,
Cutting from the first sheet feeding section is started again.

Figure 17 shows Time t2. : The motor 8 is overloaded.

Time t2°: The reverse rotation key is turned ON.

Time t23: The reverse key becomes 0FFC.

It represents the time.

When the motor 8 is overloaded at time t21 during the cutting process from the first sheet feeding section, an overload signal QVER is generated.
becomes 'H', and the outputs of the inverters 100 and 102 both become 'H#', so the paper feed table 4 is lowered.

At time t2□, when the reverse key is pressed, MRR is 1L.
'', and the cutters 6a and 6b rotate in reverse. At this time, the overload signal 0VER becomes ``L'' and is reset.

In this way, troubles caused by overload can be reset by operating the reverse key.

Further, the cutters 6a and 6b rotate only when the reverse rotation key is pressed.

FIG. 18 is a time chart showing the detection of paper feeding trouble. Time t31: The paper feeding table cover 5 is opened.

Set the time “32’%”.

Time t33: The paper feed tray cover 5 is closed.

Time t34: The leading edge of the preceding paper is detected.

Time t35: After the time set by the timer 116 (approximately 3 seconds) has elapsed from time t34, the leading edge of the following paper is not detected, so a paper feeding trouble is detected.

Time t36: Open the paper feed tray cover 5 (resolve the paper feed trouble).

Time t3. : Close the paper feed tray cover 5 and continue cutting.

It represents 8'.

Time '31 to t33 is the same as t to t3 in FIG. 15. At time t34, when the output of the inverter 79 becomes 6L'', this means that the trailing edge of the preceding paper is detected by the switch 41, and at '85, when a predetermined period of time has passed, the output of the inverter 79 becomes H#. Therefore, the output of the timer 116 becomes L", and the outputs of the AND gates 86 and 87 become L" and "H", respectively. or,
Since the outputs of the inverters 100 and 102 are both 1L'', the paper feed tray 4 is lowered.

As described above, the cutting machine according to the present invention has the following configurations.

(a) A cutting means for cutting the document; (1) A feeding means for feeding the document to the cutting means; (c) A paper feed tray for setting the document; In order to force the unstabilized DC voltage to the first driving means for moving the feeding means and the second driving means for driving the feeding means, 2. Comparing means for determining whether the voltage supplied to the second driving means is equal to or lower than a predetermined voltage;
．． Control means for controlling the i2 drive means.

Effects> As described above, according to the cutting machine according to the present invention, the first driving means for moving the feeding mechanism in order to push the paper basket set on the paper feeding table to the feeding mechanism, and the In order to judge the abnormality of the paper feed motor and the motor for raising and lowering the paper feed table, which constitute the second driving means for driving the mechanism, based on the magnitude of the voltage supplied to each motor, a plurality of Abnormalities in motors can be detected with a simple configuration, making equipment maintenance management easier.

[Brief explanation of the drawing]

FIG. 1 is a perspective view of a cutting machine according to an embodiment of the present invention. Fig. 2 is a sectional view of the above-mentioned cutting machine, Fig. 3 is a diagram showing the structure of the first paper feeding section of the above-mentioned cutting machine, and Figs. 4 to 6 are the paper feeding section and cutting of the above-mentioned cutting machine. Diagram for explaining the structure of the section, No. 7
Figures 14 to 14 are circuit diagrams constituting the above-mentioned breaker;
18 are time charts showing the operation of the circuit, and FIG. 19 is a diagram showing input and output waveforms of the circuit. DESCRIPTION OF SYMBOLS 1... Cutting machine body, 2... First paper feed port, 3... Second paper feed port, 4... Paper feed tray, 5... Paper feed tray cover, 6
a, 6b...Cutter, 7...Paper feed (feeding) roller, 8...Motor, 16...DC motor, 18
... Rotating shaft, 20... Actuator, 21...
DC motor, 22... Rotating shaft, 23... Conveyance roller, 24... Arm, 25... Shaft, 26... Belt, 27... Actuator, 28... Guide, 29.30 ...Guide, 31...Cutter fixing frame, 32.33...Guide plate, 35...Lower unit, 36...Paper feed frame, 38...Cover switch, 39...Protrusion ,40,41.42°43.4
4... Switch, 45... Document, 46... Spring, 49... AC power supply, 50... Main power switch, 55... Switch, 56... Switch, 57.5
8゜59.60... Normally open contact, 61, 62... Normally closed contact, 63... Timer circuit. Agent Patent Attorney Takeshi Sugiyama (and 1 other person) EFU7 No. 16 [84@

Claims (1)

[Scope of Claims] 1. A cutting means for cutting a document, a feeding means for feeding the document to the cutting means, and a first driving means for moving the document set on a paper feed tray to the feeding means. and a second driving means for driving the feeding means, comprising: a comparison means for comparing the voltages supplied to the first and second driving means with a predetermined voltage; and a comparison output of the comparison means. and a control means for controlling the first or second driving means according to the cutting machine.