JPH0475897A - Cutter device - Google Patents

Abstract

PURPOSE:To prevent an excessive stress from acting on a movable mechanism and to improve the durability of the title device, by stopping a pulse motor after decelerating just before completion with the return motion to the initial position of a movable blade being performed at high speed at the beginning. CONSTITUTION:A high frequency driving pulse is output to a pulse motor 11 from a pulse generation means at an ordinary motion time, and a medium is cut with a movable blade 24 at the initial position being moved at high speed to a fixed blade 23. The frequency of a driving pulse output to the pulse motor 11 from a pulse generation means is changed over to a low frequency, when the completion of the pulse output in the specified number is detected by a pulse rate switching means and the movable blade 24 after its cutting motion is separated from the fixed blade 23 at low speed. The driving pulse output to the pulse motor 11 from the pulse generation means by a sensor error prevention means is stopped after the pulse output in the specified number, when the movable part of an opening and closing mechanism and the edge of the movable blade 24 are detected by a detection sensor 33 during the low speed movement of this movable blade.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of Industrial Application The present invention relates to a cutter device used in a receipt issuing section of a cash register, a food ticket issuing machine, and the like.

2. Description of the Related Art A printer with a cutter, in which a cutter device is incorporated in the printer, is used in the cash register issuing section of a cash register, a food ticket issuing machine, and the like. This cutter-equipped printer has a structure in which a printer section including a thermal line head, etc., and a cutter device are sequentially arranged on a sheet 1 conveyance path, which is equipped with a paper conveyance mechanism such as a feed roller. A printer section performs predetermined printing on continuous paper, which is a medium conveyed on a paper conveyance path, and the printed continuous paper is cut into a predetermined length using a cutter device to issue receipts, meal tickets, etc. Here, the cutter device of such a printer with a cutter is provided with an opening/closing mechanism that supports a movable blade so as to be openable and closable relative to a fixed blade, and is driven by a pulse motor or the like. In a cutter device having such a structure, the movable blade opens and closes with respect to the fixed blade by the rotation of the pulse cutter, so after the cutting operation, the movable blade closes with respect to the fixed blade.
Initial state Sa separated from the node: The drive of the pulse motor is controlled by a predetermined control means so as to return.

Problems to be Solved by the Invention As mentioned above, as a cutter device that drives the opening/closing operation of a movable blade by the rotation of a pulse motor, for example, the movable blade can be cut by controlling the drive pulses input to the pulse motor based on the number of pulses. Something that stops it at its initial position,
There is a device that detects the moving parts with a detection sensor such as a photocoupler when the movable blade returns to the initial position, and stops the human power of driving pulses to the pulse motor.

Here, since there is inevitably a mechanical error in a moving mechanism, for example, in a device that controls the rotation of a pulse motor based on the number of pulses, the stopping position of the movable blade gradually changes as the blade opens and closes repeatedly. There is a concern that malfunctions may occur.

This kind of thing does not occur with devices that stop the movable blade according to the detection by the detection sensor, but in such a device, the pulse operator stops when the detection sensor detects the edge of the movable part, so the movable blade stops. Parts may move slightly after they have stopped due to mechanical errors or the like and may fall out of the detection area of the detection sensor. In this case, since the detection output of the detection sensor changes, an operation error will occur in the cutter device.

Here, in a device that returns the movable blade to its initial position at high speed, even if the detection sensor detects the movable part and stops driving, the movable part is slightly driven and then stops. It is possible to prevent the following errors. However, in this case, since the pulse motor rotating at high speed is suddenly stopped, excessive stress is applied to the pulse motor and movable mechanism, reducing the durability of the device.

A possible solution to this problem is to slow down the return operation of the movable blade, but this not only delays the return of the cutter device to its initial state, which is undesirable, but also prevents the detection sensor from moving the moving parts. Since the movable parts stop when the edge is detected, the above-mentioned operational errors are likely to occur frequently.

Means for Solving the Problem A fixed blade is fixedly provided in the main body of the device, a movable blade is supported by an opening/closing mechanism so as to be freely openable and closable, and a pulse motor is connected to this opening/closing mechanism. A detection sensor is disposed at a position facing at least one of the movable parts of the opening/closing mechanism and the movable blade in the initial state in which the blades are separated, and a pulse generating means is provided for outputting a drive pulse to be input to the pulse motor. Pulse rate switching means is provided for switching the frequency of the drive pulse output from the pulse generation means to the pulse motor from a high frequency to a low frequency according to a predetermined number of pulse outputs, and a sensor detects the drive pulse output from the pulse generation means to the pulse motor. A sensor error prevention means is provided which stops after outputting a predetermined number of pulses according to the output.

Operation During normal operation, the pulse generator outputs high-frequency drive pulses to the pulse motor, moves the movable blade at the initial position at high speed relative to the fixed blade to cut the medium, and then outputs a pulse to indicate completion of outputting a predetermined number of pulses. When detected by the rate switching means, the frequency of the drive pulse output from the pulse generating means to the pulse motor is switched to a low frequency, the movable blade is separated from the fixed blade at low speed after the cutting operation, and the movable blade is opened/closed while the movable blade is moving at low speed. When the detection sensor detects a moving part of the mechanism or the edge of a movable blade, the sensor error prevention means stops the drive pulses output from the pulse generation means to the pulse motor after a predetermined number of pulses have been output, and the movable part or movable blade is detected. The movable blade moves to the initial position and stops at the same time as it moves to the detection area of the sensor and stops, so the movable blade returns to the initial position at high speed at first and then slows down just before the end. Since the pulse motor is stopped after the detection sensor detects the moving parts, the pulse motor is stopped after the detection sensor detects the moving parts. Instead of stopping when the edge of the moving part is detected, the moving part moves into the detection area of the detection sensor and then stops, so even if the moving part moves slightly due to mechanical error, the detection sensor will not stop. This prevents the detection output from changing.

Embodiment An embodiment of the present invention will be explained based on FIGS. 1 to 8. First, the cutter device of this embodiment is formed as a printer with a cutter 1, and as illustrated in FIG. ing. Here, this main frame 3
A top plate 4 is attached to the top so that it can be opened and closed, and as illustrated in FIG. A feed roller 8 and a line head 9 are disposed facing each other from above and below via a path 7, thereby forming a thermal type printer section 1O within the main body frame 3.

In this printer l with a cutter, a pulse motor 11 is attached to the side surface of the main body frame 3,
As illustrated in FIG. 7, the - number of pulse motors 11
A cutter drive gear train 13 and a transport mechanism drive gear train 14, which are part of the opening/closing mechanism, are connected to a motor gear 12 attached to the motor gear 12.

Here, the cutter drive gear train 13 has a structure in which a stopper spring 18 that engages with the main body frame 3 is attached to a drive shaft 17 of a gear 16 incorporating a one-way clutch 15, A protruding bottle 2o is engaged with a slit 22 formed at the end of a rotating arm 21, which is a movable part of the opening/closing mechanism of the cutting section 2. The cutting section 2 is shown in FIGS. 5 and 6.
As illustrated in the figure, a bin 25 is provided protruding from the side surface of a movable blade 24 that is supported displaceably with respect to a fixed blade 23, and this bin 25 is inserted into a slit 25 formed at the tip of the rotating arm 21. It has a structure that is locked to.

Further, in the conveyance mechanism drive gear train 14, as illustrated in FIGS. 2 and 3, a disc-shaped cam member 28 in which a gap 27 at a predetermined angle is formed is attached to the drive shaft 28 of the feed roller 8. A pin 31 that engages with the gap 28 is protruded from the plate surface of a gear 30 that is connected to the motor gear 12 and coaxially arranged with the cam member 28. A time difference drive mechanism 32 is provided.

2. In this printer l with a cutter, as illustrated in FIGS. 5 to 7, the distal end of the rotary arm 21 in the initial state where the movable blade 24 is separated from the fixed blade 23. A detection sensor 33 made of a photocoupler or the like is arranged at an opposing position.

The pulse motor 11 of this printer with cutter l
The drive circuit (not shown) includes a pulse generating means (not shown) for outputting drive pulses, and a pulse rate switching means (not shown) for switching the frequency of the drive pulse from high frequency to low frequency after outputting a predetermined number of pulses. (not shown) and the detection sensor 3
Sensor error prevention means (not shown) is provided for stopping the drive pulse after a predetermined number of pulses have been output according to the detection output of No. 3.

In such a configuration, the operation of this printer l with a cutter will be explained based on flowchart 1 illustrated in FIG. First, in this printer with a cutter, the presence or absence of print data input to the drive circuit is constantly detected 2, and when the print data is input, a low frequency pulse is input to the balsumo 11 and the print data is The driving power based on this is input to the line head 9. Then, the transport mechanism drive gear train 14 is activated by the pulse motor 11 that rotates forward at low speed.
Since the feed roller 8 rotates forward through the feed roller 8 and the line head 9 performs heat-generating scanning, the thermal type continuous paper (
A predetermined image is printed by a line head 9 (not shown).

Here, in this cutter-equipped printer 1, the gear 3 is inserted into the gap 27 of the cam member 28 of the time difference drive mechanism 32 in the initial state.
Since the 0 bin 31 is locked, the printing operation as described above can be started quickly and reliably. In addition, during such a printing operation, the one-way clutch 1 of the cutter drive gear train 13 is
5 is idle, so that the cutter drive gear train 13 is not operated 17.

Next, when the printing data is completed and the above-described printing is completed, this printer with a cutter continues to rotate the pulse motor 11 in the forward direction by inputting a predetermined number of pulses, making it suitable for cutting continuous paper. When the conveyance is completed, the pulse motor 11 is reversely rotated with a high frequency drive pulse of about 440 (1) I) S). Then, transport machine #
Cam member 28 of time difference drive mechanism 32 of f drive gear train 14
The bin 31 of the gear 30 moves within the gap 27 and becomes uncoupled, and the feed roller 8 stops rotating and the continuous paper comes to rest. At the same time (,:,Balsmo・
- The one-way clutch 15 is interlocked with the reverse rotation of the cutter 11 to drive the cutter drive gear train 13, and the rotation of the final gear 19 of the cutter drive gear train 13 causes the rotation arm 2 to rotate.
1 rotates, and the movable blade 1 node 24 of the cutting section 2 descends. By cutting the continuous paper between the descending movable blade 24 and the fixed blank node 23, a rectangular piece of paper on which a predetermined image is printed is issued from the paper outlet 6.

In this printer with a cutter, - even after the continuous paper cutting operation as described above is completed, the pulse motor 11 continues to rotate in reverse due to the input of high-frequency drive pulses, and the transport mechanism driving gear train 14 is driven in a time-differential manner. When the bin 31 of the gear 30 is engaged with the gap 27 of the cam member 28 of the mechanism 32, the feed roller 8 rotates in the opposite direction, and the continuous paper moves backward on the paper conveyance path 7.

Here, in this printer with a cutter 1, by controlling the rotation amount of the reverse rotation of the pulse motor 11 as described above by the number of pulses, the movable blade 1 of the cutting section 2 returns to the initial position of the node 24. ing.

In other words, when the number of high-frequency drive pulses such as 440(1)I)S) output from the pulse generating means of the drive circuit reaches a predetermined number such as 262 while the pulse motor 11 is rotating in reverse, this state Since the movable blade 24 has completed the cutting operation and is close to the initial position, the pulse rate switching means detecting this with the above pulse number changes the drive pulse to 35.
It is switched to a low frequency such as 0 (pps). Then, the movable blade 24 moves according to the low speed reverse rotation of the pulse motor 11.
reaches its initial position, and the rotating arm 21 driving it reaches its initial position.
The end portion of is detected by the detection sensor 33. Therefore, the sensor error prevention means that operates according to this detection stops the output of the drive pulse after a predetermined number of drive pulses such as 2 pulses are output to the pulse motor 11, so that the end of the rotating arm 21 is connected to the detection sensor. 33 and then stops, and at the same time, the movable blade 24 also moves to the initial position and then stops.

That is, in this printer with a cutter I, as described above, the return operation of the movable blade 24 to the initial position is performed at high speed at first, and the speed is reduced just before the end, and the detection sensor 33 detects when the movable blade 24 reaches the initial position. When the rotating arm 21 is detected, the pulse motor 11 is slightly driven and then stopped, so the rotating arm 21 moves into the detection area of the detection sensor 33 and then stops. In this case, the printer l with a cutter does not stop when the detection sensor 33 detects the edge of the rotating arm 21, but stops when the side surface of the rotating arm 21 is detected, due to mechanical errors etc. Even if the rotating arm 21 moves slightly, the detection sensor 3
No error occurs in the detection output of step 3.

Furthermore, in this printer with a cutter, the pulse motor 11 is stopped after switching the rotational speed from a high speed state to a low speed state, so that excessive stress is prevented from being applied to the movable mechanism, and the durability of the device is also good. be. Moreover, the sensor 33 detects the rotary arm 21 moving at a low speed.
Since the pulse motor 11 is stopped after being driven by a predetermined amount after being detected by No error occurs in the detection output of the detection sensor 33.

In this printer with a cutter, when the reversely rotating pulse motor 11 stops, the final gear 19 of the cutter drive gear train 13 rotates once, and the cutting section 2 returns to its initial state.
Each section is set so that the leading edge of the continuous paper remains stationary at a position suitable for printing by the printer section 10.

Furthermore, in this printer l with a cutter, when the retraction of the continuous paper as described above is completed, the pulse motor 11 is rotated forward at high speed by inputting a predetermined number of pulses at a high speed rate, and the gap of the cam member 28 of the time difference drive mechanism 32 is 27, the bin 31 of the gear 30 is moved at high speed to return the transport mechanism drive gear train 14 to its initial state.

In other words, in this printer 1 with a cutter, when the pulse motor 11 is rotated in the forward direction, the feed roller 8 rotates and the continuous paper is conveyed, and when the pulse motor 11 is rotated in the reverse direction, the paper is first cut with the feed roller 8 stopped. section 2 operates to cut the continuous paper, and then the feed roller 8
rotates in the opposite direction and the continuous paper moves backward. Therefore, in this printer 1 with a cutter, the conveyance, cutting, and retraction of continuous paper can all be carried out using - number of pulse motors 11, so unlike the conventional printer with a cutter, the paper conveyance mechanism and the cutter device each have a dedicated There is no need to provide a drive source and perform synchronous control, and a device that is small, lightweight, and has a simple circuit structure can be obtained with good productivity.

Further, in the cutter-equipped printer l of this embodiment, after the continuous paper has been retracted as described above, the pulse motor 11 is rotated forward at high speed to return the time difference drive mechanism 32 of the transport mechanism drive gear train 14 to the initial state. However, during the operation to return the time difference drive mechanism 32 to its initial state, the pulse motor 11 is rotated only by the rotation of the gears 30 connected to the cam member 28. Corresponding to the extremely small load, L''tl is used, and by doing so, the device can be returned to the initial state at high speed without reducing the durability f of the parts.

Here, the approximate relationship between the rate and operation of the drive pulses of the pulse motor 1 in this cutter type printer 1 is illustrated in the timing gear 1- in FIG. The relative position of the bin 31 of the gear aO with respect to the gap 27 of the cutter 28 and the relationship between each operation are illustrated in FIG. 3.7 First, as illustrated in FIG. , the driving pulses of the pulse generator 11 are at a low frequency during printing, at a medium speed rate while driving the cutting section 2, and at a high speed of 1 note during the return of the time difference drive mechanism 32 as described above. Further, as illustrated in FIG. 3, in this printer 1 with a cutter, the printing operation is
Later, when the pulse motor 11 rotates in the reverse direction, the cutting unit 2 cuts the continuous paper to the right while the bin 31 of the gear 30 is moving in the range A in the gap 27 of the cam member 28, cutting the range F3 in the gap 27. When the bin 31 of the gear 30, which is engaged with the cam member 28, moves to range C, the feed roller 8 rotates in the opposite direction. Therefore, the gear 3 that is locked to the cam member 28
When the zero bottle 31 moves through a range corresponding to substantially the entire area of the gap 27, the time difference drive mechanism 32 returns to the initial state with both the cutting section 2 and the roller 8 stopped.

Effects of the Invention As described above, the present invention has a fixed node fixedly provided in the main body of the device, a movable node which is supported by an opening/closing mechanism so as to be openable and closable with respect to the stationary node. Connect the pulse motor 7 and detect the j=f moving blade at a position opposite to at least one of the movable parts of the opening/closing mechanism in the initial state and the movable blade L/-. A sensor is disposed, and a pulse generating means is provided which also outputs a human-powered driving pulse every pulse generator. Install a pulse 1 note switching means to switch the frequency, and detect the drive pulse output from the pulse generating means at the balsmo~evening ■! The structure is equipped with a sensor error prevention means that stops after outputting a predetermined number of pulses according to the detection output of the sensor, and during normal operation, the movable blade node is moved at high speed by setting the frequency of the pulse drive pulse to a high frequency. After outputting a predetermined number of pulses, the frequency of the drive pulse of the pulse motor is switched to a low frequency to slow down the movement of the movable blade that is close to the initial position.
By stopping the evening drive pulse after a predetermined number of outputs to stop movable parts within the detection area of the detection sensor and stopping the movable block 1 node within the initial position, the initial position of the movable block 1 node is Since the movement to return to the position is performed at high speed at first, and then the speed is reduced to a low speed just before the end, the pulse motor is stopped, which prevents excessive stress from being applied to the movable mechanism, and improves the durability of the device. , the detection sensor detects the iiJ moving parts, and after tl, the balsmo-
Since the movable part is moved minutely and then stopped, the movable part moves into the detection area of the detection sensor and then stops, and the detection sensor stops when it detects the edge of the movable part. Since the detection output of the detection sensor does not change even if the movable parts move slightly due to mechanical error or the like, it is possible to prevent operational errors from occurring in the device.

[Brief explanation of the drawing]

The drawings show an embodiment of the present invention, and FIG. 1 is a perspective view, FIGS. 2 and 3 are side views of main parts, FIG. 4 is a timing chart, and FIG. 5 is a top plate omitted. FIG. 6 is a perspective view, FIG. 6 is a side view of essential parts, FIG. 7 is a plan view, and FIG. 8 is a flow chart. l...Cutter device, 3...Device main body, 11...Pulse motor, 13.21...Opening/closing mechanism, 21...Movable parts, 23...Fixed blade, 24...Movable blade , 33 ... Detection sensor applicant Tokyo Electric Co., Ltd. Figure 7, , 1 6 Figure

Claims (1)

[Claims] A fixed blade fixedly provided on the device body, a movable movable blade disposed opposite to the fixed blade, an opening/closing mechanism supporting the movable blade so as to be openable/closable with respect to the fixed blade, and the opening/closing mechanism. a pulse motor coupled to a pulse motor; a detection sensor disposed at a position facing at least one of the movable blade and a movable part of the opening/closing mechanism in an initial state in which the movable blade is separated from the fixed blade; pulse generation means for outputting drive pulses input to the motor; pulse rate switching means for switching the frequency of the drive pulses output from the pulse generation means to the pulse motor from high frequency to low frequency according to a predetermined number of pulse outputs; The sensor error prevention means stops the drive pulses output from the pulse generation means to the pulse motor after outputting a predetermined number of pulses according to the detection output of the detection sensor, and during normal operation, the drive pulses of the pulse motor are stopped. The movable blade is moved at high speed by setting the wave number to a high frequency, and after outputting a predetermined number of pulses, the frequency of the drive pulse of the pulse motor is switched to a low frequency to slow down the movement of the movable blade close to the initial position, and the movable blade is moved at a high speed. When the detection sensor detects a component or the like, the pulse motor stops after outputting a predetermined number of drive pulses to stop the movable component or the like within the detection area of the detection sensor and to stop the movable blade within the initial position. A cutter device characterized by: