JP6923247B2 - Label printers, label printer control methods and programs - Google Patents

Description

The present invention relates to a label printer, a control method and a program for the label printer.

There are various printing devices such as label printers that print on labels attached to mounts.
Patent Document 1 discloses, as a related technique, a technique for calculating the remaining amount of paper from the transport distance of the paper during printing processing.

Japanese Unexamined Patent Publication No. 2005-313496

By the way, some label printers that print on a label attached to a mount include a phototransistor for detecting an end portion of the label and specifying a printing position. This phototransistor receives the transmitted light of the light applied to the conveyed mount and label. Since the light transmittance differs between the mount and the label, there is a difference in the amount of light received by the phototransistor between the case where the mount is irradiated with light and the case where the label is irradiated with light. The label printer distinguishes between the mount and the label by using the difference in the amount of light received by the phototransistor, detects the end of the label, and specifies the printing position. Such phototransistors used in label printers are generally expensive.
Therefore, in a label printer provided with a phototransistor for detecting the end portion of a label, there has been a demand for a technique capable of determining the near end of roll paper using the phototransistor.

An object of the present invention is to provide a label printer, a control method and a program for the label printer, which can solve the above problems.

In order to achieve the above object, the present invention comprises a transport unit which is a mount fed from a roll paper wound around a core portion and in which a plurality of labels are provided at predetermined intervals to convey the mount in the transport direction. , The light detection unit that detects light, the end identification unit that specifies the end portion of each of the plurality of labels based on the light detected by the light detection unit, and the light detected by the light detection unit. A rotation speed specifying unit that specifies the rotation speed of the core portion based on the above, a terminal region determination unit that determines the winding end region in the core portion based on the rotation speed specified by the rotation speed specifying unit, and the core portion. And a slit that is wound around a rotating body provided at a distance from the core portion and provided in parallel with the mount, and has a detection cycle shorter than the detection cycle between the ends of the adjacent labels. A label printer including a slit-shaped belt provided so as to be detectable, wherein the light detection unit detects the light applied toward the roll paper from above the roll paper below the slit-shaped belt. Is.
Further, the present invention comprises a transport unit which is a mount fed from a roll paper wound around a core portion and in which a plurality of labels are provided at predetermined intervals to convey the mount in the transport direction, and light for detecting light. The detection unit, the end identification unit that specifies the end of each of the plurality of labels based on the light detected by the light detection unit, and the core portion based on the light detected by the light detection unit. The rotation speed specifying unit that specifies the rotation speed, the end area determination unit that determines the winding end region in the core portion based on the rotation speed specified by the rotation speed specifying unit, and the rotation axis of the core portion are different. The optical detection unit includes a rotation conversion mechanism that converts to a rotation axis and a slit-shaped disk whose surface is parallel to the mount that rotates around the conversion rotation axis that is converted by the rotation conversion mechanism. It is a label printer that detects the light applied to the roll paper from above the roll paper below the slit-shaped disk.

Further, the present invention comprises a transport unit which is a mount sent out from a roll paper wound around a core portion and in which a plurality of labels are provided at predetermined intervals to convey the mount in the transport direction, and light for detecting light. A slit wound around a detection unit and a rotating body provided at a distance from the core portion and the core portion and provided in parallel with the mount, and detects between adjacent ends of the label. A control method for a label printer including a slit-shaped belt provided so as to be detectable in a detection cycle shorter than the cycle, wherein the light detection unit is applied to the roll paper from above the roll paper. The light is detected below the slit-shaped belt, the end of each of the plurality of labels is specified based on the light detected by the light detection unit, and the light detected by the light detection unit. It is a control method of a label printer including specifying the rotation speed of the core portion based on the above, and determining the winding end region in the core portion based on the specified rotation speed.
Further, the present invention comprises a transport unit which is a mount sent out from a roll paper wound around a core portion and in which a plurality of labels are provided at predetermined intervals to convey the mount in the transport direction, and light for detecting light. The detection unit, the rotation conversion mechanism that converts the rotation axis of the core portion to another rotation axis, and the slit shape whose board surface is parallel to the mount that rotates around the conversion rotation axis converted by the rotation conversion mechanism. A control method for a label printer including a disk, wherein the light detection unit detects the light applied to the roll paper from above the roll paper and below the slit-shaped disc. Identifying each end of the plurality of labels based on the light detected by the light detection unit, and specifying the rotation speed of the core portion based on the light detected by the light detection unit. It is a control method of a label printer including determining a winding end region in the core portion based on the specified rotation speed.

Further, the present invention comprises a transport unit which is a mount sent out from a roll paper wound around a core portion and in which a plurality of labels are provided at predetermined intervals to convey the mount in the transport direction, and light for detecting light. A slit wound around a detection unit and a rotating body provided at a distance from the core portion and the core portion and provided in parallel with the mount, and detects between adjacent ends of the label. A slit-shaped belt provided so as to be detectable in a detection cycle shorter than the cycle is provided, and the light directed from above the roll paper toward the roll paper is directed below the slit-shaped belt. To the computer included in the label printer to be detected in the above, the end of each of the plurality of labels is specified based on the light detected by the light detection unit, and the light is detected by the light detection unit. It is a program for specifying the rotation speed of the core portion and determining the winding end region in the core portion based on the specified rotation speed.
Further, the present invention comprises a transport unit which is a mount fed from a roll paper wound around a core portion and in which a plurality of labels are provided at predetermined intervals to convey the mount in the transport direction, and light for detecting light. The detection unit, the rotation conversion mechanism that converts the rotation axis of the core portion to another rotation axis, and the slit shape whose board surface is parallel to the mount that rotates around the conversion rotation axis converted by the rotation conversion mechanism. The light detection unit is provided in a computer including a label printer including a disk, wherein the light detection unit detects the light applied to the roll paper from above the roll paper below the slit-shaped disk. Identifying each end of the plurality of labels based on the light detected by the light detection unit, and specifying the rotation speed of the core portion based on the light detected by the light detection unit. It is a program to determine the winding end region in the core portion based on the rotation speed and to execute.

According to the present invention, the edge of the label can be specified and the near end of the roll paper can be determined based on the amount of light received by one photodetector.

It is a figure which shows an example of the structure of the label printer by 1st Embodiment of this invention. It is a figure which shows an example of the structure of the slit-shaped belt by 1st Embodiment of this invention. It is a figure which shows an example of the structure of the light emitting part, the light receiving part and the signal processing part by 1st Embodiment of this invention. It is a figure which shows an example of the voltage waveform in the label printer by 1st Embodiment of this invention. It is a figure which shows the processing flow of the label printer by 1st Embodiment of this invention. It is a figure which shows an example of the structure of the label printer by the 2nd Embodiment of this invention. It is a figure which shows the example of the slit-shaped disk by the 2nd Embodiment of this invention. It is a figure which shows the minimum structure of the label printer by embodiment of this invention. It is a schematic block diagram which shows the structure of the computer which concerns on at least one Embodiment.

<First Embodiment>
The label printer 1 according to the first embodiment of the present invention will be described.
The label printer 1 according to each embodiment of the present invention is an example of effectively utilizing one phototransistor provided in advance for detecting the edge of a label.
The label printer 1 according to the first embodiment of the present invention has a function of detecting the near end (termination region) of the roll paper and notifying the user in advance that the roll paper will soon run out. As shown in FIG. 1, the label printer 1 includes a first roller 71 (core portion), a third roller 73 (rotating body), a slit-shaped belt 80, a roll paper 40, a mount 50, and a label 60. A fourth roller 74, a light emitting unit 10, a light receiving unit 20 (light detection unit), a second roller 72 (conveying unit), a printing unit 90, a signal processing unit 30, and a notification unit 31 are provided. ..
The arrow indicated by the reference numeral A1 in FIG. 1 indicates the transport direction in which the label L1 is transported.

The first roller 71 is a roller that serves as a rotation axis of the roll paper 40.
The third roller 73 is provided at a predetermined position in the transport direction A1 with reference to the position of the first roller 71. A slit-shaped belt 80 is wound around the first roller 71 and the third roller 73.

As shown in FIG. 2, the slit-shaped belt 80 is provided with a plurality of slit SLs at regular intervals in the transport direction A1. The plurality of slits SL are provided so as to be detectable in a detection cycle shorter than the detection cycle between the ends of the label 60, which will be described later. For example, the plurality of slits SL are provided at intervals sufficiently shorter than the intervals between adjacent labels 60, which will be described later. Each of the plurality of slits SL is, for example, a rectangular slit that is long in a direction intersecting the transport direction A1. As described above, the third roller 73 is provided at a predetermined position in the transport direction A1 with respect to the position of the first roller 71. Therefore, the moving direction of the slit SL when the slit-shaped belt 80 rotates coincides with the direction of the transport direction A1. The light transmittance of the portion of the slit-shaped belt 80 other than the slit is lower than the light transmittance of the slit of the slit-shaped belt 80.

The roll paper 40 is wound around the first roller 71. The roll paper 40 is a roll around which the mount 50 is wound.
The mount 50 is a mount for attaching the label 60. The light transmittance of the mount 50 is higher than the light transmittance of the portion other than the slit of the slit-shaped belt 80. Further, the light transmittance of the mount 50 is lower than the light transmittance of the slit of the slit-shaped belt 80.

The label 60 is a print object of the printing unit 90. The label 60 is attached to the mount 50 at a predetermined interval in the transport direction A1. The light transmittance of the label 60 is lower than the light transmittance of the mount 50, the portion other than the slit of the slit-shaped belt 80, and the slit of the slit-shaped belt 80. The light transmittance of each of the mount 50, the label 60, the portion other than the slit of the slit-shaped belt 80, and the slit of the slit-shaped belt 80 affects the amount of light received by the light receiving unit 20. As will be described later, the voltage Vout1 output by the light receiving unit 20 is a voltage corresponding to the amount of light received by the light receiving unit 20. Therefore, the voltage Vout1 output by the light receiving unit 20 is a voltage corresponding to the light transmittance of each of the mount 50, the label 60, the portion other than the slit of the slit-shaped belt 80, and the slit of the slit-shaped belt 80.

In the transport path where the mount 50 to which the label 60 is affixed is transported in the transport direction A1, a fourth roller 74, a light emitting unit 10, and a printing unit 90 are provided on the upper side of the mount 50. Further, a second roller 72 is provided below the printing unit 90 with a mount 50 interposed therebetween. Further, below the light emitting unit 10, a light receiving unit 20 is provided so as to separate the mount 50 and the slit-shaped belt 80. Further, a signal processing unit 30 is connected to the light receiving unit 20. Further, the signal processing unit 30 is provided with a notification unit 31.

The fourth roller 74 is a roller that presses the mount 50 from above the mount 50 to keep the printed surface above the label 60 horizontal.

As shown in FIG. 3, the light emitting unit 10 includes a light emitting diode 101 and a resistor 102.

The cathode of the light emitting diode 101 is connected to the ground GND. The anode of the light emitting diode 101 is connected to the first terminal of the resistor 102. The second terminal of the resistor 102 is connected to the power supply terminal VDD1. The resistor 102 is a resistor that limits the current so that an overcurrent does not flow through the light emitting diode 101. Here, the power supply terminal VDD1 is a terminal that outputs a constant voltage determined so that the light emitting diode 101 emits light with a certain amount of light.

When the light emitting diode 101 and the resistor 102 are connected in this way, the light emitting diode 101 flows a constant current corresponding to a constant voltage output by the power supply terminal VDD1. While a constant current flows, the light emitting diode 101 irradiates the mount 50 and the label 60 with a constant amount of light according to the magnitude of the current. This light is light for specifying the end portion of the label 60 and is irradiation light for specifying the rotation speed of the first roller 71. The end of the label 60 is the boundary between the mount 50 and the label 60.

The second roller 72 is rotated at a constant rotational speed by a driving device (for example, a motor or the like) (not shown). When the second roller 72 rotates at a constant rotation speed and the mount 50 is pulled out in the transport direction A1 due to the frictional force generated between the second roller 72 and the mount 50, the roll wound around the first roller 71. The mount 50 is sent out from the paper 40, and the first roller 71 rotates. When the first roller 71 rotates, the third roller 73 around which the slit-shaped belt 80 is wound rotates.
Therefore, while the second roller 72 is rotating, the mount 50 is sent out from the roll paper 40, and when the label 60 attached to the mount 50 is conveyed in the feeding direction A1, the roll wound around the first roller 71. The radius of the paper 40 becomes smaller. As a result, the second roller 72 rotates at a constant rotational speed, and as the mount 50 is conveyed in the conveying direction A1, the rotational speed of the first roller 71 increases. Therefore, as the rotation speed of the first roller 71 increases, the rotation speed of the slit-shaped belt 80 and the rotation speed of the third roller 73 increase. At this time, as shown in FIGS. 1 and 3, the slit-shaped belt 80 passes between the light emitting unit 10 and the light receiving unit 20 in parallel with the mount 50 and is conveyed in the conveying direction A1.
Each of the first roller 71, the third roller 73, and the fourth roller 74 is a rotor that rotates for the first time when the second roller 72 is rotated at a constant rotation speed by the driving device.

When the label 60 attached to the mount 50 is conveyed to the position of the printing unit 90, the printing unit 90 performs predetermined printing.

As shown in FIG. 3, the light receiving unit 20 includes a phototransistor 201 (photodetector unit) and a resistor 202.

The emitter of the phototransistor 201 is connected to ground GND. The collector of the phototransistor 201 is connected to the first terminal of the resistor 202. The second terminal of the resistor 202 is connected to the power supply terminal VDD2. The resistance value of the resistor 202 and the voltage value of the voltage output by the power supply terminal VDD2 are such that the amount of current flowing through the phototransistor 201 changes according to the amount of light received by the phototransistor 201 (for example, in the linear region of the phototransistor 201). Determined to work).

When the phototransistor 201 and the resistor 202 are connected in this way, the phototransistor 201 passes a current corresponding to the amount of light while receiving light. Specifically, the phototransistor 201 receives the transmitted light transmitted through the mount 50, the label 60, and the slit-shaped belt 80 among the light emitted by the light emitting diode 101, and receives a current corresponding to the amount of the received light. Shed. At this time, the voltage Vout1 of the collector of the phototransistor 201 is a voltage obtained by subtracting the voltage calculated by multiplying the resistance value of the resistor 202 by the current value of the current flowing through the phototransistor 201 from the voltage of the power supply terminal VDD2.

The signal processing unit 30 specifies the end portion of the label 60 and the rotation speed of the first roller 71. As shown in FIG. 3, the signal processing unit 30 includes a first comparator 301 (end identification unit), a second comparator 302, a frequency counter 303 (rotation speed identification unit), and a near-end determination unit 304 (termination region determination). Part) and.

The first comparator 301 is a comparator for identifying the end of the label 60. The first comparator 301 receives the reference voltage VREF1. Further, the first comparator 301 receives the voltage Vout1 at the second terminal of the phototransistor 201.
The first comparator 301 compares the voltage Vout1 with the reference voltage VREF1. The first comparator 301 outputs the voltage VS1 according to the comparison result.
Specifically, for example, when the comparison result shows that the voltage Vout1 is higher than the reference voltage VREF1, as shown in the part (a) of FIG. 4, the first comparator 301 sets the voltage VS1 indicating the High level. Output. Further, for example, as shown in the portion (a) of FIG. 4, the first comparator 301 outputs the voltage VS1 indicating the Low level when the comparison result indicates that the voltage Vout1 is lower than the reference voltage VREF1. When the voltage Vout1 and the reference voltage VREF1 are the same voltage, the first comparator 301 outputs a voltage VS1 indicating a level between the Low level and the High level assuming ideal operation. However, the actual first comparator 301 outputs a voltage VS1 indicating one of the Low level and the High level due to the asymmetry of the internal circuit, noise, and the like.

The second comparator 302 is a comparator for detecting the near end of the roll paper 40. The second comparator 302 receives the reference voltage VREF2. Further, the second comparator 302 receives the voltage Vout1 at the second terminal of the phototransistor 201.
The second comparator 302 compares the voltage Vout1 with the reference voltage VREF2. The second comparator 302 outputs the voltage VS2 according to the comparison result.
Specifically, for example, the second comparator 302 sets the high level voltage VS2 when the comparison result shows that the voltage Vout1 is higher than the reference voltage VREF2, as shown in the part (a) of FIG. Output. Further, for example, the second comparator 302 outputs the voltage VS2 indicating the Low level when the comparison result indicates that the voltage Vout1 is lower than the reference voltage VREF2, as shown in the part (a) of FIG. When the voltage Vout1 and the reference voltage VREF2 are the same voltage, the second comparator 302 outputs a voltage VS2 indicating a level between the Low level and the High level assuming ideal operation. However, the actual second comparator 302 outputs a voltage VS2 indicating one of the Low level and the High level due to the asymmetry of the internal circuit, noise, and the like.

The frequency counter 303 acquires the voltage VS1 from the first comparator 301. Further, the frequency counter 303 acquires the voltage VS2 from the second comparator 302. The frequency counter 303 specifies the rotation speed of the first roller 71 based on the acquired voltage VS1 and voltage VS2.
Specifically, the frequency counter 303 identifies the frequency of the voltage VS2 by counting the rise and fall of the voltage VS2 per unit time during the period when the voltage VS1 indicates that the label 60 does not exist. The number of rising and falling counts of the voltage VS2 per unit time increases as the rotation speed of the first roller 71 increases, and the count number and the rotation speed of the first roller 71 have a one-to-one correspondence. Therefore, specifying the frequency of the voltage VS2 by the frequency counter 303 is equivalent to specifying the rotation speed of the first roller 71.
The period in which the voltage VS1 indicates that the label 60 does not exist is, for example, a period in which the voltage VS1 in the portion (b) of FIG. 4 indicates the Low level. A detailed description of the voltage waveform shown in FIG. 4 will be described later.

The near-end determination unit 304 determines whether or not the roll paper 40 is near-end based on the rotation speed of the first roller 71 specified by the frequency counter 303.
Specifically, the near-end determination unit 304 is predetermined to determine the frequency of the voltage VS2 specified by the frequency counter 303 (that is, equivalent to the rotation speed of the first roller 71) and whether or not it is near-end. Compare with the frequency threshold (ie, equivalent to the rotational speed threshold). Then, for example, when the frequency of the voltage VS2 exceeds the threshold value of the frequency, the near-end determination unit 304 determines that the roll paper 40 is near-end, that is, it is time to replace the roll paper 40 soon. Further, the near-end determination unit 304 determines that, for example, when the frequency of the voltage VS2 is equal to or lower than the frequency threshold value, the roll paper 40 is not near-end, that is, it is not necessary to replace the roll paper 40 yet.
The near-end determination unit 304 outputs a determination result of whether or not the roll paper 40 is near-end to the notification unit 31.

The notification unit 31 receives a determination result of whether or not the roll paper 40 is near-end from the near-end determination unit 304. The notification unit 31 notifies the user whether or not it is necessary to replace the roll paper 40 based on the received determination result.
Specifically, when the received determination result is a result indicating that the roll paper 40 is near-end, the notification unit 31 indicates that "the time to replace the roll paper is approaching" by sound (including voice). ), Image (including characters), vibration, etc. to notify the user. Further, when the received determination result is a result indicating that the roll paper 40 is not the near end, the notification unit 31 does not particularly notify anything. If the received determination result is a result indicating that the roll paper 40 is not near-end, the notification unit 31 indicates that "the roll paper 40 does not need to be replaced" with a sound (including voice) and an image (including voice). The user may be notified by vibration (including characters) or vibration.

Each of the light emitting unit 10, the light receiving unit 20, and the printing unit 90 is provided at a predetermined fixed position. Further, as described above, the second roller 72 rotates at a constant rotation speed and conveys the label 60 attached to the mount 50 in the conveying direction A1. Therefore, when the end portion of the label 60 is specified, the positional relationship between the light receiving unit 20 (light emitting unit 10) and the label 60 is specified. Therefore, the positional relationship between the label 60 and the printing unit 90 can be specified, and the timing at which the label 60 is conveyed to the position of the printing unit 90 can be predicted by using the rotation speed of the second roller 72.

Next, the voltage waveform shown in FIG. 4 will be described.
It is assumed that the second roller 72 is rotating at a constant rotation speed. Further, it is assumed that the light emitting diode 101 emits light with a constant amount of light.

When the second roller 72 rotates at a constant rotation speed, four objects (that is, a mount 50, a label 60, and a slit-shaped belt 80) are conveyed between the light emitting unit 10 and the light receiving unit 20. The state exists.

The first state is a state in which the label 60 is provided on the mount 50 and the slit SL of the slit-shaped belt 80 does not exist. In this first state, the light emitted by the light emitting unit 10 is blocked by the label 60, the mount 50, and the slit-shaped belt 80. Therefore, the first state is a state in which the light emitted by the light emitting unit 10 is the most difficult to reach the light receiving unit 20, that is, the amount of light received by the light receiving unit 20 is the smallest among the four states. Therefore, the current flowing through the phototransistor 201 in the first state is the smallest among the four states, and the voltage Vout1 of the light receiving unit 20 is the highest voltage V1 shown in the portion (a) of FIG.

The second state is a state in which the label 60 is provided on the mount 50 and a slit SL of the slit-shaped belt 80 is present. In this second state, the light emitted by the light emitting unit 10 is blocked by the mount 50 and the label 60. Therefore, the second state is a state in which the light emitted by the light emitting unit 10 is the second most difficult to reach the light receiving unit 20, that is, the amount of light received by the light receiving unit 20 is the second smallest among the four states. .. The label 60 blocks light almost 100%. Therefore, the current flowing through the phototransistor 201 in the second state is substantially the same as the current flowing through the phototransistor 201 in the first state, and the voltage Vout1 of the light receiving unit 20 is the voltage V1 shown in the portion (a) of FIG. It becomes.

The third state is a state in which the label 60 does not exist on the mount 50 and a slit SL of the slit-shaped belt 80 exists. In this third state, the light emitted by the light emitting unit 10 is blocked only by the mount 50. Therefore, the third state is a state in which the light emitted by the light emitting unit 10 reaches the light receiving unit 20 most easily, that is, the amount of light received by the light receiving unit 20 is the largest among the four states. Therefore, the current flowing through the phototransistor 201 in the third state is the largest among the four states, and the voltage Vout1 of the light receiving unit 20 is the lowest voltage V3 shown in the portion (a) of FIG.

The fourth state is a state in which the label 60 does not exist on the mount 50 and a state in which the slit SL of the slit-shaped belt 80 does not exist. In this fourth state, the light emitted by the light emitting unit 10 is blocked by the mount 50 and the slit-shaped belt 80. Therefore, the fourth state is a state in which the light emitted by the light emitting unit 10 is the third most difficult to reach the light receiving unit 20, that is, the amount of light received by the light receiving unit 20 is the third smallest among the four states. .. Therefore, the current flowing through the phototransistor 201 in the fourth state is larger than the current flowing through the phototransistor 201 in the first and second states, and less than the current flowing through the phototransistor 201 in the third state. As a result, the voltage Vout1 of the light receiving unit 20 in the fourth state becomes the voltage V2 between the voltage V1 and the voltage V3 shown in the portion (a) of FIG.

From the first to fourth states described above, it can be seen that the voltage Boot1 becomes the voltage V1 in the state where the label 60 is provided on the mount 50. Further, it can be seen that the voltage Vout1 becomes the voltage V2 or the voltage V3 when the label 60 does not exist on the mount 50.
Therefore, the reference voltage VREF1 received by the first comparator 301 is set as the voltage between the voltage V1 and the voltage V2. The first comparator 301 compares the received reference voltage VREF1 with the received voltage Vout1. When the voltage Vout1 exceeds the reference voltage VREF1, the first comparator 301 determines that the label 60 is provided on the mount 50. Further, when the voltage Vout1 is less than the reference voltage VREF1, the first comparator 301 determines that the label 60 does not exist on the mount 50.
By doing so, the first comparator 301 can determine whether or not the label 60 is provided on the mount 50. That is, when the determination of the first comparator 301 changes from the state in which the label 60 is provided on the mount 50 to the state in which the label 60 is not provided on the mount 50, or the label 60 is not provided on the mount 50. The position of the mount 50 above the light receiving unit 20 when the determination changes from the state to the state where the label 60 is provided on the mount 50 can be determined as the end of the label 60.
The waveform of the voltage VS1 in the portion (b) of FIG. 4 is the first when the voltage Vout1 exceeds the reference voltage VREF1 (that is, when it is determined that the label 60 is provided on the mount 50). When the comparator 301 outputs the high level voltage VS1 and the voltage Vout1 is less than the reference voltage VREF1 (that is, when it is determined that the label 60 does not exist on the mount 50), the first comparator 301 is at the low level. This is an example of a waveform that outputs the voltage VS1 of.

Further, from the first to fourth states described above, it can be seen that the voltage Vout1 becomes the voltage V2 in the state where the label 60 does not exist on the mount 50 and in the state where the slit SL of the slit-shaped belt 80 does not exist. Further, it can be seen that the voltage Vout1 becomes the voltage V3 in the state where the label 60 does not exist on the mount 50 and the slit SL of the slit-shaped belt 80 exists.
Therefore, the reference voltage VREF2 received by the second comparator 302 is set as the voltage between the voltage V2 and the voltage V3. The second comparator 302 compares the received reference voltage VREF2 with the received voltage Vout1. In the second comparator 302, when the voltage Vout1 exceeds the reference voltage VREF2 in the state where the label 60 does not exist on the mount 50 (in the example shown in FIG. 4, the voltage VS1 is at the Low level), the slit SL of the slit-shaped belt 80 is formed. Indicates that it is in an existing state. Further, the second comparator 302 uses the slit-shaped belt 80 when the voltage Vout1 is less than the reference voltage VREF2 in the state where the label 60 does not exist on the mount 50 (in the example shown in FIG. 4, the voltage VS1 is at the Low level). Indicates that the slit SL is present.
By doing so, the second comparator 302 can determine whether or not the slit SL of the slit-shaped belt 80 is present in the state where the label 60 is not present on the mount 50.
The waveform of the voltage VS2 in the portion (c) of FIG. 4 shows that the slit SL of the slit-shaped belt 80 exists when the voltage Vout1 exceeds the reference voltage VREF2 (that is, when the label 60 does not exist on the mount 50). When it is determined that the second comparator 302 outputs a high level voltage VS2 and the voltage Vout1 is less than the reference voltage VREF2 (that is, when the label 60 does not exist on the mount 50, the slit-shaped belt 80 This is an example of a waveform in which the second comparator 302 outputs the Low level voltage VS2 when it is determined that the slit SL of the above does not exist.

As described above, as the second roller 72 conveys the mount 50 in the conveying direction A1 at a constant rotational speed, the rotational speed of the first roller 71 increases. As the rotation speed of the first roller 71 increases, the rotation speed of the slit-shaped belt 80 and the rotation speed of the third roller 73 increase. Therefore, as the second roller 72 conveys the mount 50 in the conveying direction A1 at a constant rotation speed, the voltage waveform shown in FIG. 4 becomes shorter in the time axis direction. That is, as the second roller 72 transports the mount 50 in the transport direction A1 at a constant rotation speed, the voltage VS2 changes during the period when the voltage VS1 is at the Low level (that is, the label 60 does not exist on the mount 50). Each of the cycle T1, the low level period t1 in the cycle T1, and the high level period t2 in the cycle T1 becomes shorter.
Therefore, the frequency counter 303 specifies the frequency of the voltage VS2 in the period when the voltage VS1 is the Low level, so that the period T1 in which the voltage VS2 changes, the period t1 of the Low level in the period T1, and the period T1 thereof. The period t2 of the High level in. The near-end determination unit 304 determines whether or not the frequency of the voltage VS2 detected by the frequency counter 303 exceeds a predetermined threshold value. Then, when the near-end determination unit 304 determines that the frequency of the voltage VS2 exceeds a predetermined threshold value, it determines that the roll paper 40 is near-end. Further, when the near-end determination unit 304 determines that the frequency of the voltage VS2 is equal to or less than a predetermined threshold value, it determines that the roll paper 40 is not near-end.
By doing so, the near-end determination unit 304 can determine the near-end of the roll paper 40.

Next, the processing of the label printer 1 according to the first embodiment of the present invention will be described.
Here, the processing flow of the label printer 1 shown in FIG. 5 will be described.
It is assumed that the second roller 72 is rotating at a constant rotation speed. Further, it is assumed that the light emitting unit 10 emits light with a constant amount of light.

When the second roller 72 rotates at a constant rotation speed, the mount 50 is conveyed in the conveying direction A1. The mount 50 passes between the light emitting unit 10 and the light receiving unit 20. Therefore, there are four states between the light emitting unit 10 and the light receiving unit 20 depending on the combination of the conveyed objects (that is, the mount 50, the label 60, and the slit-shaped belt 80). The amount of light received by the light receiving unit 20 differs depending on these four states. The light receiving unit 20 generates a voltage Vout1 according to the amount of received light (step S1). Therefore, the light receiving unit 20 outputs the voltage Vout1 corresponding to the four states to the first comparator 301 and the second comparator 302.

The first comparator 301 receives the voltage Vout1 from the light receiving unit 20. Further, the first comparator 301 receives the reference voltage VREF1. For example, when the voltage Vout1 output by the light receiving unit 20 has the waveform shown in the portion (a) of FIG. 4, the reference voltage VREF1 is set to a voltage between the voltage V1 and the voltage V2.
The first comparator 301 determines whether or not the label 60 does not exist on the mount 50 based on the received voltage Vout1 and the received reference voltage VREF1 (step S2).
Specifically, the first comparator 301 compares the received reference voltage VREF1 with the voltage Vout1. Then, for example, when the voltage Vout1 output by the light receiving unit 20 has the waveform shown in the portion (a) of FIG. 4, the first comparator 301 determines that the voltage Vout1 exceeds the reference voltage VREF1 (that is, on the mount 50). When it is determined that the label 60 is provided), the high level voltage VS1 is output. Further, the first comparator 301 outputs the Low level voltage VS1 when the voltage Vout1 is less than the reference voltage VREF1 (that is, when it is determined that the label 60 does not exist on the mount 50).
The first comparator 301 outputs a voltage VS1 indicating a determination result of whether or not the label 60 does not exist on the mount 50 to the frequency counter 303.

The second comparator 302 receives the voltage Vout1 from the light receiving unit 20. Further, the second comparator 302 receives the reference voltage VREF2. For example, when the voltage Vout1 output by the light receiving unit 20 has the waveform shown in the portion (a) of FIG. 4, the reference voltage VREF2 is set to a voltage between the voltage V2 and the voltage V3.
The second comparator 302 generates the voltage VS2 based on the comparison result between the received voltage Vout1 and the received reference voltage VREF2 (step S3).
Specifically, for example, when the voltage Vout1 output by the light receiving unit 20 has the waveform shown in the portion (a) of FIG. 4, the second comparator 302 has a high level when the voltage Vout1 exceeds the reference voltage VREF2. The voltage VS2 of is output. Further, the second comparator 302 outputs the Low level voltage VS2 when the voltage Vout1 is less than the reference voltage VREF2.
The second comparator 302 outputs the generated voltage VS2 to the frequency counter 303.
The process of step S3 performed by the second comparator 302 is performed in parallel with the process of step S2 performed by the first comparator 301.

The frequency counter 303 receives the voltage VS1 from the first comparator 301. Further, the frequency counter 303 receives the voltage VS2 from the second comparator 302.
The frequency counter 303 identifies the frequency f1 of the voltage VS2 based on the received voltage VS1 and the received voltage VS2 in a state where the label 60 does not exist on the mount 50 (step S4).
Specifically, when the voltage VS1 received by the frequency counter 303 from the first comparator 301 is, for example, the waveform shown in the portion (a) of FIG. 4, the voltage VS1 generated by the first comparator 301 is at the Low level. For a certain period of time, the mount 50 shows a state in which the label 60 does not exist. Further, the voltage VS2 generated by the second comparator 302 in a state where the label 60 does not exist on the mount 50 indicates whether or not the slit SL of the slit-shaped belt 80 exists. Therefore, the frequency counter 303 counts the number of transitions between the Low level and the High level per unit time of the voltage VS2 received from the second comparator 302 during the period when the voltage VS1 is the Low level.
The frequency counter 303 outputs the frequency of the specified voltage VS2 to the near-end determination unit 304.
The process of step S4 performed by the frequency counter 303 is performed in parallel with the process of step S2 performed by the first comparator 301 and the process of step S3 performed by the second comparator 302. The reciprocal of the frequency of the voltage VS2 identified by the frequency counter 303 in the process of step S4 corresponds to the period T1 shown in the part (c) of FIG.
Further, instead of the frequency counter 303, for example, a universal counter may be used. The universal counter can measure the time width from the rise to the fall of the pulse. Therefore, when the universal counter is used, the time t1 and the time t2 shown in the part (c) of FIG. 4 can be specified.

The near-end determination unit 304 receives the frequency f1 from the frequency counter 303. The near-end determination unit 304 determines the near-end of the roll paper 40 based on the received frequency f1 and a predetermined frequency threshold value for determining whether or not the roll paper 40 is near-end.
Specifically, the near-end determination unit 304 compares the received frequency f1 with a predetermined frequency threshold value for determining whether or not the frequency f1 is near-end, and the frequency f1 exceeds the threshold value. Whether or not it is determined (step S5).
When the near-end determination unit 304 determines that the frequency f1 exceeds the threshold value (YES in step S5), it determines that the roll paper 40 is near-end, that is, it is time to replace the roll paper 40 soon (). Step S6).
Further, when the near-end determination unit 304 determines that the frequency f1 is equal to or lower than the frequency threshold value, it determines that the roll paper 40 is not near-end, that is, it is not necessary to replace the roll paper 40 yet. Then, the near-end determination unit 304 returns to the process of step S2.
It should be noted that a predetermined frequency threshold value for determining whether or not it is near-end may be determined by simulation, experiment, or the like.
The near-end determination unit 304 outputs a determination result of whether or not the roll paper 40 is near-end to the notification unit 31.

The notification unit 31 receives a determination result of whether or not the roll paper 40 is near-end from the near-end determination unit 304. The notification unit 31 notifies the user whether or not it is necessary to replace the roll paper 40 based on the received determination result (step S7).
Specifically, when the received determination result is a result indicating that the roll paper 40 is near-end, the notification unit 31 indicates that "the time to replace the roll paper is approaching" by sound (including voice). ), Image (including characters), vibration, etc. to notify the user. Further, when the received determination result is a result indicating that the roll paper 40 is not the near end, the notification unit 31 does not particularly notify anything. If the received determination result is a result indicating that the roll paper 40 is not near-end, the notification unit 31 indicates that "the roll paper 40 does not need to be replaced" with a sound (including voice) and an image (including voice). It may notify the user by vibration (including characters) or vibration.

The label printer 1 according to the first embodiment of the present invention has been described above.
The label printer 1 according to the first embodiment of the present invention includes a second roller 72 (conveying unit), a phototransistor 201 (photodetecting unit), a frequency counter 303 (rotational speed specifying unit), and a near-end determining unit 304 (near-end determination unit 304). (Termination area determination unit) and. The second roller 72 conveys the roll paper 40 on which the labels 60 are provided on the mount 50 at a plurality of intervals in the conveying direction A1. The phototransistor 201 detects the light for specifying the end portion of the label 60 and the light for specifying the rotation speed of the first roller 71 (core portion) around which the roll paper 40 is wound. The frequency counter 303 specifies the rotation speed based on the light for specifying the rotation speed of the first roller 71 around which the roll paper 40 is wound, which is detected by the phototransistor 201. The near-end determination unit 304 determines the winding end region of the first roller 71 based on the rotation speed of the first roller 71 specified by the frequency counter 303.
In this way, the label printer 1 can identify the end portion of the label 60 and determine the near end of the roll paper 40 based on the amount of light received by one phototransistor 201.

<Second embodiment>
The label printer 1 according to the second embodiment of the present invention will be described.
The label printer 1 according to the second embodiment of the present invention has a function of detecting the near end of the roll paper and notifying the user in advance that the roll paper will soon run out. As shown in FIG. 6, the label printer 1 includes a light emitting unit 10, a light receiving unit 20 (light detecting unit), a signal processing unit 30, a roll paper 40, a mount 50, a label 60, and a first roller 71. A (core portion), a second roller 72 (conveyance portion), a fourth roller 74, a rotation conversion mechanism 81, a slit-shaped disk 82, a rotation shaft 83, and a printing portion 90 are provided.
The arrow indicated by the reference numeral A1 in FIG. 6 indicates the transport direction in which the label L1 is transported.

The rotation conversion mechanism 81 is a mechanism for changing the direction of the rotation axis. The rotation conversion mechanism 81 is realized, for example, by combining a plurality of gears. The rotation conversion mechanism 81 according to the second embodiment of the present invention is a mechanism that converts the rotation axis of the first roller 71 into the rotation axis of the slit-shaped disk 82.

As shown in FIG. 7, the slit-shaped disk 82 is provided with a plurality of radial slits SL at intervals in the circumferential direction about the rotation shaft 83. Each of the plurality of slits SL has, for example, a triangular shape. The surface of the slit-shaped disk 82 is parallel to the mount 50. When the first roller 71 rotates, the slit-shaped disk 82 rotates about the rotation shaft 83 converted by the rotation conversion mechanism 81.

The label printer 1 according to the second embodiment of the present invention has a slit-shaped belt 80 that rotates in conjunction with the rotation of the first roller 71 in the label printer 1 according to the first embodiment of the present invention. It is replaced with a slit-shaped disk 82 that rotates in conjunction with the rotation of 71. Therefore, the label printer 1 according to the second embodiment of the present invention has the first to fourth states as in the first embodiment of the present invention. Therefore, the Vout1 generated by the light receiving unit 20 according to the second embodiment of the present invention is the same as the Vout1 generated by the light receiving unit 20 according to the first embodiment of the present invention. The processing of the label printer 1 according to the second embodiment of the present invention can be considered in the same manner as the processing of the label printer 1 according to the first embodiment of the present invention.

The label printer 1 according to the second embodiment of the present invention has been described above.
The label printer 1 according to the second embodiment of the present invention includes a second roller 72 (conveying unit), a phototransistor 201 (photodetecting unit), a frequency counter 303 (rotational speed specifying unit), and a near-end determining unit 304 (near-end determination unit 304). (Termination area determination unit) and. The second roller 72 conveys the roll paper 40 on which the labels 60 are provided on the mount 50 at a plurality of intervals in the conveying direction A1. The phototransistor 201 detects the light for specifying the end portion of the label 60 and the light for specifying the rotation speed of the first roller 71 (core portion) around which the roll paper 40 is wound. The frequency counter 303 specifies the rotation speed based on the light for specifying the rotation speed of the first roller 71 around which the roll paper 40 is wound, which is detected by the phototransistor 201. The near-end determination unit 304 determines the winding end region of the first roller 71 based on the rotation speed of the first roller 71 specified by the frequency counter 303.
In this way, the label printer 1 can identify the end portion of the label 60 and determine the near end of the roll paper 40 based on the amount of light received by one phototransistor 201.

The label printer 1 having the minimum configuration according to the embodiment of the present invention will be described.
As shown in FIG. 8, the label printer 1 having the minimum configuration according to the embodiment of the present invention includes a second roller 72 (conveying unit), a phototransistor 201 (photodetecting unit), and a frequency counter 303 (rotational speed specifying unit). And a near-end determination unit 304 (termination area determination unit).

The second roller 72 conveys the roll paper having labels provided on the mount at a plurality of intervals in the conveying direction.

The phototransistor 201 detects the light for specifying the end portion of the label and the light for specifying the rotation speed of the first roller (core portion) around which the roll paper is wound.

The frequency counter 303 specifies the rotation speed based on the light for specifying the rotation speed of the first roller around which the roll paper is wound, which is detected by the phototransistor 201.

The near-end determination unit 304 determines the near-end (winding end region in the first roller) of the roll paper based on the rotation speed of the first roller specified by the frequency counter 303.

In this way, the label printer 1 can identify the end of the label based on the amount of light received by one phototransistor 201 (photodetector), and can determine the near end of the roll paper. can.

In the slit-shaped belt 80, instead of the first roller (core portion), the rotation speed of the first roller is changed to another rotation speed (for example, faster than the rotation speed of the first roller) depending on the gear ratios of the plurality of gears. It may be wound around another core converted to (speed). When the slit-shaped belt 80 is wound around a core having a rotation speed faster than that of the first roller, the slit-shaped belt 80 is faster than the mount 50 between the core and the third roller 73. Rotate. As a result, the plurality of slits SL can be detected with a detection cycle shorter than the detection cycle between the ends of the labels 60, as in the case where the plurality of slits SL are provided at intervals sufficiently shorter than the distance between the adjacent labels 60. Become.

In each embodiment of the present invention, in the light receiving unit 20, the light emitted by the light emitting unit 10 is an object (that is, the mount 50, the label 60 and the slit-shaped belt 80, or the mount 50, the label 60 and the slit-shaped disk 82. ) Are received in the four states determined by the combination of). However, the light receiving unit 20 may use the reflected light of the light emitted by the light emitting unit 10.
For example, the roll paper 40 is supposed to transmit most of the irradiated light (for example, 90%). The label 60 is made of a material that is a printable surface without transmitting light. Further, the slit portion of the slit-shaped belt 80 (or the slit-shaped disk 82) is filled with a material that does not transmit light and has a higher reflectance than the surface of the label 60. Further, the portion of the slit-shaped belt 80 (or the slit-shaped disk 82) other than the slit is a material that does not transmit light, has a higher reflectance than the surface of the label 60, and has a lower reflectance than the material in which the slit is filled. Process with. Further, the light path that irradiates the light receiving portion 20 with the light reflected by the label 60 while being reflected by the mirror or the like and the light reflected by the slit-shaped belt 80 (or the slit-shaped disk 82) are reflected by the mirror or the like. However, the light receiving unit 20 is provided with an optical path for irradiating the light.
By doing so, the slit of the slit-shaped belt 80 (or the slit-shaped disk 82) is filled in the light receiving unit 20 within a range in which the order of the amount of light according to the order of the reflectance does not change due to the loss of light in each optical path. The amount of light reflected by the material is the largest, the amount of light reflected by the label 60 is the smallest, and the amount of light reflected by the processed material other than the slit of the slit-shaped belt 80 (or slit-shaped disk 82) is , Between them. That is, the voltage Vout1 generated based on the light received by the light receiving unit 20 is shown in the portion (a) of FIG. 4 within a range in which the order of the amount of light according to the order of reflectance does not change due to the loss of light in each optical path. It becomes the same as the voltage Vout1. Therefore, even when the label printer 1 according to another embodiment of the present invention uses reflected light, the end portion of the label is specified based on the amount of light received by one phototransistor 201 (photodetector). At the same time, the near end of the roll paper 40 can be determined.

In the processing flow according to the embodiment of the present invention, the order of processing may be changed as long as appropriate processing is performed.

Each of the storage units in the embodiment of the present invention may be provided anywhere as long as appropriate information is transmitted and received. Further, each of the storage units may exist in a plurality of units within a range in which appropriate information is transmitted and received, and the data may be distributed and stored.

Although the embodiment of the present invention has been described, each of the above-mentioned label printer 1 and other control devices may have a computer system inside. The process of the above-mentioned processing is stored in a computer-readable recording medium in the form of a program, and the above-mentioned processing is performed by the computer reading and executing this program. Here, the computer-readable recording medium refers to a magnetic disk, a magneto-optical disk, a CD-ROM, a DVD-ROM, a semiconductor memory, or the like. Further, this computer program may be distributed to a computer via a communication line, and the computer receiving the distribution may execute the program.

Further, the above program may realize a part of the above-mentioned functions. Further, the program may be a file that can realize the above-mentioned functions in combination with a program already recorded in the computer system, that is, a so-called difference file (difference program).

FIG. 9 is a schematic block diagram showing the configuration of a computer according to at least one embodiment.
As shown in FIG. 9, the computer 5 includes a CPU 6, a main memory 7, a storage 8, and an interface 9.
For example, each of the above-mentioned signal processing unit 30 and notification unit 31 is mounted on the computer 5. The operation of each processing unit described above is stored in the storage 8 in the form of a program. The CPU 6 reads the program from the storage 8, expands it into the main memory 7, and executes the above processing according to the program. Further, the CPU 6 secures a storage area corresponding to each of the above-mentioned storage units in the main memory 7 according to the program.

Examples of the storage 8 include HDD (Hard Disk Drive), SSD (Solid State Drive), magnetic disk, optical magnetic disk, CD-ROM (Compact Disk Read Only Memory), DVD-ROM (Digital Versaille Disk Read). , Semiconductor memory and the like. The storage 8 may be internal media directly connected to the bus of computer 5, or external media connected to computer 5 via an interface 9 or a communication line. When this program is distributed to the computer 5 via a communication line, the distributed computer 5 may expand the program in the main memory 7 and execute the above processing. In at least one embodiment, the storage 8 is a non-temporary tangible storage medium.

Although some embodiments of the present invention have been described, these embodiments are examples and do not limit the scope of the invention. These embodiments may be added, omitted, replaced, or modified without departing from the gist of the invention.

1 ... Label printer 5 ... Computer 6 ... CPU
7 ... Main memory 8 ... Storage 9 ... Interface 10 ... Light emitting unit 20 ... Light receiving unit 30 ... Signal processing unit 31 ... Notification unit 40 ... Roll paper 50 ... -Mount 60 ... Label 71 ... 1st roller 72 ... 2nd roller 73 ... 3rd roller 74 ... 4th roller 80 ... Slit-shaped belt 81 ... Rotation conversion mechanism 82 ... Slit-shaped disk 83 ... Rotating shaft 90 ... Printing unit 101 ... Light emitting diode 102, 202 ... Resistance 201 ... Phototransistor 301 ... First comparator 302 ... Second Comparator 303 ... Frequency counter 304 ... Near-end determination unit VDD ... Power supply voltage LED ... Ground

Claims (7)

A transport unit that transports the mount, which is a mount sent out from a roll paper wound around a core portion and has a plurality of labels provided at predetermined intervals, in a transport direction.
A photodetector that detects light and
An end specifying part that specifies each end of the plurality of labels based on the light detected by the light detecting part, and an end specifying part.
A rotation speed specifying unit that specifies the rotation speed of the core portion based on the light detected by the light detecting unit, and a rotation speed specifying unit.
A terminal region determination unit that determines the winding end region in the core portion based on the rotation speed specified by the rotation speed specification unit, and a terminal region determination unit.
A slit wound around the core portion and a rotating body provided at a distance from the core portion and provided in parallel with the mount, which is shorter than the detection cycle between the ends of the adjacent labels. A slit-shaped belt that can be detected in the detection cycle and
Equipped with a,
The photodetector
The light applied from above the roll paper toward the roll paper is detected below the slit-shaped belt.
Label printer. A transport unit that transports the mount, which is a mount sent out from a roll paper wound around a core portion and has a plurality of labels provided at predetermined intervals, in a transport direction.
A photodetector that detects light and
An end specifying part that specifies each end of the plurality of labels based on the light detected by the light detecting part, and an end specifying part.
A rotation speed specifying unit that specifies the rotation speed of the core portion based on the light detected by the light detecting unit, and a rotation speed specifying unit.
A terminal region determination unit that determines the winding end region in the core portion based on the rotation speed specified by the rotation speed specification unit, and a terminal region determination unit.
A rotation conversion mechanism that converts the rotation axis of the core to another rotation axis,
A slit-shaped disk whose surface is parallel to the mount that rotates around the converted rotation axis converted by the rotation conversion mechanism.
With
The photodetector
The light applied from above the roll paper toward the roll paper is detected below the slit-shaped disk.
Label printer. The light detected by the photodetector includes reflected light reflected by the label.
The label printer according to claim 1 or 2. A transport unit that conveys the mount, which is a mount sent out from a roll paper wound around a core portion and has a plurality of labels provided at predetermined intervals in a transport direction, a light detection unit that detects light, and the core. A slit wound around a portion and a rotating body provided at a distance from the core portion and provided in parallel with the mount, and has a detection cycle shorter than the detection cycle between the ends of adjacent labels. It is a control method of a label printer provided with a slit-shaped belt provided so as to be detectable by.
The light detection unit detects the light applied to the roll paper from above the roll paper below the slit-shaped belt.
Identifying the end of each of the plurality of labels based on the light detected by the photodetector.
To specify the rotation speed of the core portion based on the light detected by the photodetector unit,
Determining the winding end region in the core based on the specified rotation speed,
How to control a label printer, including. A transport unit that conveys the mount, which is a mount sent out from a roll paper wound around a core portion and has a plurality of labels provided at predetermined intervals in a transport direction, a light detection unit that detects light, and the core. A label including a rotation conversion mechanism that converts the rotation axis of the unit into another rotation axis, and a slit-shaped disk whose surface is parallel to the mount that rotates around the conversion rotation axis converted by the rotation conversion mechanism. It ’s a printer control method.
The light detection unit detects the light applied to the roll paper from above the roll paper below the slit-shaped disk.
Identifying the end of each of the plurality of labels based on the light detected by the photodetector.
To specify the rotation speed of the core portion based on the light detected by the photodetector unit,
Determining the winding end region in the core based on the specified rotation speed,
How to control a label printer, including. A transport unit that conveys the mount, which is a mount sent out from a roll paper wound around a core portion and has a plurality of labels provided at predetermined intervals in a transport direction, a light detection unit that detects light, and the core. A slit wound around a portion and a rotating body provided at a distance from the core portion and provided in parallel with the mount, and has a detection cycle shorter than the detection cycle between the ends of adjacent labels. label printer in comprising a slit-like belt is provided so as to be detected, and you detect the said light detecting section is devoted directed to the roll from the upper side of the roll paper light at the lower of the slit-shaped belt On the computer that contains
Identifying the end of each of the plurality of labels based on the light detected by the photodetector.
To specify the rotation speed of the core portion based on the light detected by the photodetector unit,
Determining the winding end region in the core based on the specified rotation speed,
A program that executes. A transport unit that conveys the mount, which is a mount sent out from a roll paper wound around a core portion and has a plurality of labels provided at predetermined intervals in a transport direction, a light detection unit that detects light, and the core. It is provided with a rotation conversion mechanism that converts the rotation axis of the unit into another rotation axis, and a slit-shaped disk whose surface is parallel to the mount that rotates around the conversion rotation axis converted by the rotation conversion mechanism. A computer including a label printer that detects the light applied to the roll paper from above the roll paper by the light detection unit below the slit-shaped disk.
Identifying the end of each of the plurality of labels based on the light detected by the photodetector.
To specify the rotation speed of the core portion based on the light detected by the photodetector unit,
Determining the winding end region in the core based on the specified rotation speed,
A program that executes.

Images