JPH01127297A - Recorder - Google Patents

Abstract

PURPOSE: To shorten a paper path up to a discharge port of recording paper from a cutting means by arranging a detecting means to detect an overcurrent of a DC driving means to operate the cutting means, and arranging a display device to display abnormality of the cutting means in response to an output signal of the detecting means. CONSTITUTION: An electric current of a DC motor 9 to drive a cutter 11 is sampled by a sample hold circuit 202. This sampled signal is digitalized by an A/D converter 204, and this electric current value is compared with a preset value by a second comparator 208, and when this detected electric current value exceeds the preset value, a second LED 220 is made to emit the light, and an operator is informed of the occurrence of a paper jam. When this detected electric current value is smaller than this preset value and is larger than a second preset value, output pulses of an AND circuit 210 are counted by a counter 212, and when they reach a prescribed frequency, a first LED 218 is made to emit the light, and the operator is informed of the fact that the cutter 11 completes the service life.

Description

Detailed Description of the Invention [Object of the Invention] (Industrial Application Field) The present invention relates to a recording device that records image information using roll paper.

(Conventional technology) Wake up and read the first thing. In order to detect this paper jam, conventionally, as shown in FIG. 6, detection elements (36a) are installed at positions facing each other in the paper path (34) from the cutting part of the cutter (30) to the recording paper outlet (32). , receiving element (3
6b) was placed. After the image information is recorded by the recording means (37), the DC motor (31) is driven to operate the movable blade (30a) of the cutter (30). When a certain period of time has passed after the end of the operation, the detection element (36a
), and when this source is not detected, send this status signal from the receiving element (36b) to the control 1% (:l),
An indicator (40)K indicates that a paper jam has occurred. With such a configuration, the paper bus from the cutting part of the cutter (30) to the discharge port (32) becomes long in order to arrange the transmitting element, the element (36a), and the receiving element (36b). Let's do it. If the paper path is long, there is a possibility of paper jam, which increases the mounting space and hinders the storage of the recording device.

(The main point that the invention aims to solve) This invention was made to solve the above-mentioned problem, and is a recording device that detects paper jams without using a detection element or a light-receiving element to shorten the paper path. The purpose is to provide

[Structure of the invention]

(Means for Solving the Problem) The present invention detects an overcurrent in the DC drive source that operates the cutting means for company recording paper, and displays an abnormality in the cutting means to the operator in response to the overcurrent detection signal. It is configured to do this.

(Function) In the present invention, the current of the DC driving means that drives the cutting means is detected, and when an overcurrent exceeding a certain value is detected, an abnormality in the cutting means of the recording device is displayed in response to this detection signal.

(Example) An embodiment of the present invention will be described with reference to the drawings.

As shown in Figure 2, the cutter that can be used to cut the recording paper consists of a fixed blade (3) fixed to the bottom (la) of the mount (1), and a K axis on the side plate (lb) of the mount (1). Supported movable blade (5
). Then, the movable blade (5) rotates in one end direction @ (7) Fi, and the rotation shaft (9a) of the DC drive motor (9) (hereinafter referred to as DC motor) is
)K connected. In addition, a detection plate (13) is arranged on the rotating shaft (8) toward the other end of the movable blade (group). In addition, the normally movable blade (the hole when the group is in the standby position (13a)
) A 7-oto interrupter (14) is arranged at a position corresponding to the position. This photo interrupter (14) detects the position of the hole (13a) and monitors whether the movable blade is in the standby position.
The rotation of the DC motor (9) is controlled while detecting whether the photointerrupter (14) is turned on or off. That is, in the standby state, the photointerrupter (14) is on, and when cutting starts, the photointerrupter (14) is turned on.
4) is turned off. Then, when it rotates once and returns to the standby position, it will turn on again, so at that timing the DC motor (9
) to a stop, and at that position the movable blade (5
) is kept on standby.

If a paper jam occurs in the paper path from the cutter (11) to the discharge port (47) 1, the recording paper will stay near the cutting section of the cutter (11). In this state, cutter (11)
When the movable blade (■) continues to move until it has cut all the accumulated recording paper, the movable blade (5) continues to move in proportion to this.
) also increases the load on the DC motor (9) that drives the motor.

-1: As the cutter (11) repeats the cutting operation many times, the cutting quality becomes worse. Along with this, the load on the DC motor (9) also increases compared to when cutting normally. By the way, in general, the characteristics of the load and current of a DC motor are in a proportional relationship as shown in Fig. 3.Moreover, when the current l flowing through the DC motor is larger than k, k is a paper jam, and I! Therefore, this characteristic is used to detect the current of the DC motor that drives the cutter, and when any of the nine conditions mentioned above is met, an abnormality in the internal state of the recording device (40) is detected. Displays that the paper jam and cutter are at the end of their service life.The circuit to achieve this is configured as shown in Figure 1, for example.A sample and hold circuit is used to detect the current of the DC motor (202) is connected to the DC motor (9)K and sampled, and this signal is converted to a digital signal through the A/D converter (204).The digital signal representing the magnitude of the current value obtained in this way is used to control The current is input to the control section (200) and compared in magnitude with the preset current 111 [L and l.In the control section (200), the first comparator (206) and the second comparator (208) The first comparator (206
) and the L level output of the second comparator (208) are input to the AND circuit (210), and this output is
It is connected to the power input terminal (212). Also, the first comparator (
The L level output of the cutter standby position detection unit (216) is connected via an inverter (214). Of the outputs of the control section (200) described above, the first LBD (218) is connected to the quanta (212), and the second comparator (20B) K is connected to the second LED (218).
20) is connected, and the cutter standby position detection operation section (
216) is connected to a position detection sensor (13a) of the cutter (11), not shown.

The operation of the above circuit will be explained using the flowchart of FIG. 1
After resetting the cutter (212) to ktl-O (step 1ot), the interrupter (14) checks whether the cutter (11) is in the standby position (step 1ot).
Stella 7102). After confirmation, start turning off (step 10)
3) Do. After one hour has passed since the start of cutting, that is, just before cutting the normal recording paper, the L)C motor (9)
The sample and hold circuit (202) samples the flowing current, and the sampled signal is digitized by the A/D converter (204) (step 104).
). Digitized current value I tI'i, 1st (7)
Comparator (206)Ktel! (step 105)
), L level fTx, that is, I≦1. At this time, it is determined that there is no abnormality, and no display is performed (step 106), and the cutter waiting position detection operation unit (2
]6) to prepare for the next cutting operation. Also, I is compared with work 1 in the second comparator (208) (step 10).
7) When the H level, that is, I'll, is detected, the second LED (220) is made to emit light to indicate that there is a paper jam (step 108). Furthermore, the first comparator (2
The H level of 06) and the L level of the second comparator (208) are ANDed in the AND circuit (210), and if the H level is output, that is, I, <I≦11.
At this time, the output pulse of the AND circuit (210) is cuffed/counted by the counter (212). When the pulse is detected, the first L E D (218)
to emit light (steps 109 to 111).

Conversely, if the number of detections is less than three, the cutter standby position detection operation section (216) is driven to prepare for the next recording.

In this way, in the ± embodiment, the current of the DC motor (9) that drives the cutter (11) is detected, and in conjunction with the detection operation, the LED is emitted to notify the operator of the paper jam or the life of the cutter. Therefore, there is no need to install a sensor for paper jam detection in the middle of the paper bus. Therefore, the paper bus from the cutter (11) to the recording paper outlet 1 can be shortened, and the mounting space can be reduced. Furthermore, since the service life of the cutter (11) is notified, periodic inspection of the cutter (11), which was conventionally required, is no longer necessary.

In the above embodiment, the current value of the DC motor (9) is I≦1.
．． , I, (I≦11.1:>1.), but the control unit is not limited to this, and it is possible to compare 1 with 11 to determine whether a paper jam occurs. It is also possible to have a configuration that only detects and displays whether or not it has been completed.The circuit configuration for realizing this is shown in Figure 5.Both ends of the resistor (17) connected to the JC motor (9) and the power supply are connected to the base and collector of the transistor (19).The emitter is connected to the LED (2x) and the resistor (23).
) are connected in series and power supply ■2 is supplied.

Note that the transistor (19) is 1. larger current I
K is activated so that when the current flows to the base, the LhiD (21) emits light. Therefore, when a larger electric current flows through the DC motor (9), the LMD (21) emits light to indicate that it is a paper jam.

As yet another embodiment, the transistor (19) in FIG.
Work! Make it work when a larger current flows through the base. In this embodiment, the current I of the DC motor (9)
If the value is greater than 12, the LED (21) is unconditionally illuminated to indicate that either a paper jam or the end of the cutter life has occurred.

Since the abnormality of the cutting means is displayed in conjunction with the overcurrent detection operation of the DC drive source that drives the cutting means without providing a sensor, the paper bus from the cutting means to the recording paper ejection zero is can be made shorter. Therefore, the volume of the recording device can be reduced.

[Brief explanation of the drawing]

Fig. 1 is a circuit diagram showing one embodiment of the present invention, Fig. 2 is a perspective view showing the main parts of the same embodiment, Fig. 3 is a correlation diagram showing the characteristics of the DC drive source, and Fig. 4 is a circuit diagram showing the above embodiment. FIG. 5 is a flow chart showing an example, FIG. 5 is a circuit diagram showing another embodiment, and FIG. 6 is a partial sectional view showing a conventional example. 9...DC motor (DC drive means) 11...Cutter (cutting means) 19...Transistor (detection means) 21...L
ED (display device) 300... Control Department Representative Patent Attorney Nori Chika Ken Yudo Yamashita - Sun 1 Figure '42 Figure #.・Mitsu, 蔀゛Ding 3rd seat 4

Claims (2)

[Claims] (1) A recording paper cutting means, a DC drive means for operating this cutting means, a detection means for detecting an overcurrent of this DC drive means, and an abnormality in the cutting means in response to an output signal of this detection means. What is claimed is: 1. A recording device comprising: a device for displaying. (2) The recording apparatus according to claim 1, wherein at least one of the recording paper jam and the time to replace the cutting means is notified in response to an output signal from the detection means.