JPS59131482A - Label feeder for label printer - Google Patents

Abstract

PURPOSE:To reduce the consumption of electric power in a luminous device without lowering of label feeding accuracy by setting up the luminous period of the luminous device to a time taken to send label in a minimum amount or to one over several number of the time. CONSTITUTION:A pulse motor is driven by pulse PD of period T1. Since a base paper is sent every one of pulse PD, the period T1 becomes a time taken to send label in a minimum amount. The period of pulse P generated in a pulse generating circuit 14 is taken to be T2. The reason that the oscillating period T2 is smaller than the period T1 is in that a dispersion of timing of the front edge detection of label by a label detector 10 is within the range of minimum sending of label. The printing position can be determined and sending and stopping positions can be also determined exactly.

Description

TECHNICAL FIELD OF THE INVENTION The present invention relates to a label feeding device for a label printer that optically detects the position of a label and controls its feeding.

Technical Background and Problems In general, label printers must perform label feeding in order to set the printing position on the label, issue and stop the printed label, but it is necessary to start and stop the feeding operation Q. The standard is set by optically detecting the label. An example is now shown in FIGS. 1 and 2.

First, labels (2) are arranged at regular intervals on a long mount (1), and this mount (1) is fed from a roll-shaped supply section (3) to a printer (4) and a peeling section ( 5), it passes through the feeding section (6) and reaches the winding section (force).Then, the ζ mount (1) is suddenly bent at the peeling section (5), so the label (2) has a strong stiffness. is peeled off and sent out almost horizontally.

A label detector (10) consisting of a light emitter (8) and a light receiver (9) is provided in this sending part. It consists of a feed roller (12+) connected to the feed roller (12+) and a presser roller (+3) pressed against the feed roller (+3).

Next, the light emitting device (8) is similar to an LBD, and the pulse generating circuit (14) is connected to a driver (
). Moreover, the light receiver (9)
is not a phototransistor, and this light receiver (9) is connected to I10 via a waveform shaping circuit Q6) and a comparator (17).
Connected to port Bet. This I10 boat α Neha C
It is connected to the PU u91 and connected to the pulse motor αυ via a driver.

Thus, light is intermittently generated from the light emitter (8) at a period set in the pulse generating circuit I. This intermittent light emission is to reduce power consumption. Now, when the label (2) is removed by hand after printing is completed, the label detector (10) generates a signal indicating that there is no label. That is, light hits the photoreceiver (9) and emits a signal, which is shaped and compared with a reference voltage in the converter (17), resulting in a signal without a label. As a result, the pulse motor U can be
υ is driven and moves the mount (1). As a result, the primary label (2) is peeled off and the leading edge of the label (2) is detected by the label detector Ql). This detection generates a label presence signal, and from this moment on, when constant feeding is performed, the printer (4) starts, prints characters at a predetermined position, advances further, stops feeding completely, and removes the label (2). Make it possible to roll a 9.

In conventional devices that operate in this way, a pulse generation circuit (1
The oscillation frequency of 4) is extremely high, and the power consumption is high.

Further, in the case of manual issuance, etc., the start of feeding of the label (2) is performed by the issuance switch. Therefore, the label detector (10) only needs to operate when the label detector (10) detects the leading edge of the label (2). However, in the conventional device, the light emitter (8) is always energized even during standby, 9 consuming unnecessary power.

OBJECTS OF THE INVENTION The object of the present invention is to obtain a spiral feeding device for a label printer with extremely low power consumption.

SUMMARY OF THE INVENTION The present invention sets the light emitting period of the light emitter to match the time required to send the minimum label feed 9i, or to a value of several minutes. In addition, when there is a timing when detecting the presence or absence of a label is unnecessary, such as during manual issuance, by stopping the operation of the pulse generation circuit during that time, the power consumption can be further reduced by -N. It is configured so that it can be performed.

Embodiment of the Invention An embodiment of the present invention will be described with reference to FIGS. 3 and 4. Components that are the same as those described in FIGS. 1 and 2 are designated by the same reference numerals, and explanations thereof will be omitted. In this embodiment, the pulse motor l11) is driven by a pulse PD with a period T1.
This is done by Therefore, since the mount (1) is fed every time the pulse PD is fired, the cycle T1 is the time required to feed the label (2) by the minimum feed amount.

However, the period of the pulse P generated in the pulse generating circuit I is assumed to be T2. This cycle IAT2 is set to match the cycle T, or to a value equal to the number of cycles T. The one shown in Figure 4 is set to T2-T, and the light emitter (8
) is extremely short.

The reason why the oscillation period T2 is not made thicker than the period T1 is that the variation in the timing of detecting the front track of the label (2) by the label detector 10) is due to the minimum feed #)l of the label feed 9.
! This is to keep the print position within the range of "it", so that the printing position can be accurately determined, and the feeding stop can also be accurately determined.

Next, the pulse generating circuit is connected to the CPUu via the I10 port a. Now, when label issuance is not performed using a signal without a label as described above, but when the label is issued by operating the issuance switch, the label detector (10) is used only when the front of the label (2) is detected. It is enough to operate. Therefore, by pressing the issue switch, a start signal is given to the pulse generation circuit (14) and the operation is started.Then, the pulse motor Ql) is operated and the label is fed. When the leading edge of the label (2) is detected by the label detector 00), the feeding of the pulse motor Ql) is controlled from that moment and a stop signal is given to the pulse generating circuit I to stop it. Therefore, during the next 1τ when the emission switch is pressed, the light emitter (9)
energized, resulting in significant power savings.

Effects of the Invention According to the present invention, when the light emitting device is caused to emit light based on the signal from the pulse generating circuit as described above, the light emitting device is caused to emit light at a cycle that is equal to or equal to the time required to send the minimum amount of label feeding. This makes it possible to reduce the power consumption of the light emitter while maintaining accurate label feeding accuracy.
Further, when label detection is not required, further power saving can be achieved by stopping the operation of the pulse generation circuit.

[Brief explanation of the drawing]

FIG. 1 is a side view showing the mechanism of a label printer, FIG. 2 is a block diagram showing a conventional example, FIG. 3 is a block diagram showing an embodiment of the present invention, and FIG. 4 is a timing chart. 2.Label, 8.Issuer, 9.Receiver, 11
Pulse motor, 14 Hals generation circuit application Person Tokyo Electric Co., Ltd. - Shika, Figure 1 (Figure 171

Claims (1)

[Scope of Claims] 1. A label using a light receiver including a light emitter that emits light at a predetermined period based on a signal from a pulse generation circuit, and a light receiver that detects the presence or absence of a label by receiving light from the light emitter. and a feed motor that feeds the label based on a detection signal, the light emitting cycle of the light emitter is set to match the time required to send the minimum amount of the label or several minutes.
A label feeding device for a label printer, characterized in that it is set to: 2 A light emitter that emits light at a predetermined period based on a signal from a pulse generation circuit, a light receiver that detects the presence or absence of a label by receiving light from this light emitter, and a label sending system based on a label detection signal from this light receiver. 9, the light emitting cycle of the light emitter is set to match the time required to send the label by the minimum feed amount of 9, or several minutes.
A label feeding device for a label printer, characterized in that the pulse generation circuit is set to stop operating when there is no need to detect the presence or absence of a label.