JPH0686131B2 - Print media cutting device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Outline] A medium cutting device for detecting a mark on a medium after printing on a continuous print medium such as roll paper, and cutting the mark. In consideration of the above, the mark whose length has been set is detected, the print medium is fed from the detection position by the distance set in the setting section, stopped, and then cut. It is possible to cut the part to make the mark part smaller.

[Industrial application field]

The present invention relates to a roll paper cutting device used in a printer for printing receipts and the like, and more particularly to a print medium cutting device capable of cutting by reducing the size of a mark indicating a cutting position.

In recent years, after printing transaction details on continuous paper such as roll paper in automatic transaction equipment used in financial institutions, etc., or electronic cash registers used in Point of Sales (POS) systems, etc. It is cut and issued as a receipt.

There is a demand for a method of making a mark indicating a cutting position as small as possible in cutting such continuous paper.

[Conventional technology]

A method of cutting continuous printing paper in the receipt issuing device will be described with reference to the perspective views of FIGS. 6 and 7.

FIG. 6 shows an outline of an apparatus according to the conventional method (1). The receipt paper 1a rolled into a roll is provided with feed holes 3 for setting the sprockets 2 on both edges, and is equivalent to one receipt. Perforations 4 are provided for each length.

Therefore, when the transaction content is printed by a printer (not shown), it is sent by the rotational movement of the sprocket 2, and since the feed amount for one sheet is determined by the amount of rotation of the sprocket 2, it stops after a predetermined rotation. Therefore, the operator cuts the receipt paper 1a at the cut edge 5 and issues the receipt 1b.

Further, FIG. 7 shows an outline of an apparatus according to the conventional example (2), in which the receipt paper 1c wound in a roll shape is fed by the feed roller R ₁
It is set by the rotation of the feed roller R ₁ .

For example, a black mark m1 is written on one edge of the receipt paper 1c for each length of one receipt.

A mark sensor S ₁ and a cutter unit 6 are provided in front of the feed roller R _{1 and on} the right side of the drawing.

Therefore, when the receipt paper 1c is printed and sent out by a printer (not shown), the black mark m1 is displayed by the mark sensor S ₁
Then, the feed roller R ₁ is stopped, the receipt paper 1c is cut by the cutter unit 6, and the receipt 1d is issued.

[Problems to be solved by the invention]

The above method has the following problems. That is, in the conventional example (1), since the feed amount of the receipt paper 1a is determined by the rotation amount of the sprocket 2, if the receipt paper 1a is not set correctly at the time of setting, not only the printing position is displaced, It is not cut at the position of 4, and the appearance as the receipt 1b is spoiled.

In the conventional example (2), since the black mark m1 is used only for detecting the receipt feed amount, the size of the black mark m1 is large, and when the receipt paper 1c is cut,
As shown in the figure, the black mark m1 remains as it is on the edge of the receipt 1d, which is unpleasant and unfavorable in appearance.

[Means for solving problems]

FIG. 1 is a block diagram of the principle of the present invention. In the figure, 12 is a medium transporting unit for transporting a continuous print medium, 9 is a predetermined interval on the continuous print medium, and is provided with a length obtained by adding a length capable of discriminating the difference between the maximum print character and the character A detection unit for detecting the formed mark, and 10 is a setting unit for setting the transfer amount of the continuous print medium after the mark is detected by the detection unit 9 until the position where the center of the mark is cut is reached.

Therefore, based on the detection of the detection unit 9, the set value is read from the setting unit 10, and the medium transfer unit 12 transfers the continuous print medium by the set value according to the detection position and then cuts it.

[Action]

After the printing is performed, when the detection unit 9 detects the mark of the continuous print medium transferred by the medium transfer unit 12, the setting unit 10
Since the set value is read from and the continuous print medium is cut at the position where the set value has been transferred, the mark is cut at the center position of the mark, the mark remaining on the continuous print medium can be minimized, and there is a defect in appearance. Can be reduced.

〔Example〕

An embodiment of the present invention will be described below with reference to FIGS. FIG. 2 is a side view showing an embodiment according to the present invention, and FIG.
FIG. 4 is a control block diagram of FIG. 2, FIG. 4 is a timing chart of FIG. 2, and FIG. 5 is an explanatory diagram of FIG. The same reference numerals denote the same objects throughout the drawings. Also, in FIG.
Those corresponding to the figure are shown surrounded by a one-dot chain line.

As shown in FIG. 2, the receipt issuing device is set with the rolled receipt paper 1e, and the pulse motor M0
It is delivered by the drive of the feed roller R ₂ connected to the.

A printer unit 7, a mark sensor S _2, and a cutter unit 6 are provided in front of the feed roller R _{2 and on} the right side of the drawing.

The distance between the printer unit 7 and the cutter unit 6 is set in consideration of the upper margin amount of the receipt, and the distance A between the mark sensor S ₂ and the cutter unit 6 is set.

A feed roller R ₃ that discharges and conveys the cut receipt 1f is provided on the right side of the cutter unit 6 and is connected to a motor (not shown).

Black marks m are written on one edge of the receipt paper 1e at a pitch that is the length of one receipt.

Black marks m are written on one edge of the receipt paper 1e at a pitch that is the length of one receipt.

The length M of the black mark m is a value (H + α) obtained by adding the length α necessary for identifying the difference between the character and the black mark m to the height H of the character to be printed.

For example, when H = 3.3 (mm), α = 1.2 (mm) and H
+ Α = 4.5 (mm)

The width of the black mark m is the minimum width that the mark sensor S ₂ can distinguish from the width of the character.

Next, in FIG. 3, the main control unit 8 reads out the set values D ₁ and D ₂ corresponding to the size of the designated print character from the setting unit 10a and stores them in the set value memory 12, and also the pulse generation function. And has a function of controlling each unit to perform delivery, printing, mark detection, cutting and the like of the receipt paper 1e.

The keyboard 9a is provided with an input key for data necessary for transactions and a designation button 9b for designating the size of a print character.

Since the format of the receipt differs depending on the financial institution, it is necessary to change the size of the characters printed on the receipt in accordance with the print column of the receipt.

Therefore, if the size of the printed character is different, the height H of the character is also different, and the length M of the black mark m must be changed.

That is, the setting unit 10a stores respective set values D ₁ and D ₂ corresponding to the size of each character printable by the printer unit.

When the character size is input from the keyboard 9a, a setting value corresponding to the input character size is selected and used for cutting the receipt medium.

Here, the set value D ₁ is set corresponding to the size of the print character in order to distinguish the print character from the black mark m.

That is, when the black mark m is detected by the mark sensor S ₂ , when the print character is printed up to the position near the black mark m, the mark sensor S ₂ must detect it so that the black mark m and the character are not mistaken. I have to. Below is the fourth detection method.
This will be described in detail with reference to the timing chart in the figure.

1) The control unit 8 gives a pulse to the pulse motor M0 at regular time intervals, and the receipt paper 1e is sent every step. Here, the main controller 8 samples the output of the mark sensor S ₂ for each step.

2) As shown in FIG. 4 (a), a black mark m at a
When the black mark m is ON for the number of steps exceeding the height H of the printed character, for example, 19 times, it is recognized as a mark.

3) As shown in FIG. 4 (b), the detection of the black mark m has started at the point a, but a signal without a mark between the points b and c is not recognized as a mark detected for four steps or more, Mark detection is performed only when the mark sample is restarted from the point c and the condition of FIG. 4 (a) is satisfied.

The set value D ₂ is calculated and set from the following elements. That is, to explain with reference to FIG. 5, as shown in FIGS. 5 (a) and 5 (b), the mark sensor
The distance L ₁ at which the receipt paper 1e is fed from when the tip of the black mark m having the length M comes to the position of S ₂ until the detection ends by the set value D _{1 As} shown in FIG. 5 (c), the mark sensor The distance L ₂ to which the receipt paper 1e is fed due to the response delay of the detection of S _{2 As} shown in FIG. 5D, the distance L ₃ to which the receipt paper 1e is fed during the time required to stop the feed roller R ₂ If the tip of the black mark m comes to the position of the mark sensor S ₂ and it is detected that a stop command is immediately issued,
The amount receipt paper 1e is sent before stopping L becomes _{L = L 1 + L 2 +} L 3.

Here, as shown in FIG. 5 (e), the setting value D ₂ in order to cut at the central position of the black mark m by the cutter unit 6 from the mark sensor S ₂ to the position of the distance A, the set value D ₂ = A- (LM-2).

As an example of numerical values, assuming that the pulse motor M0 rotates at 400 steps per rotation and 1000 steps per second, and the diameter d of the feed roller R ₂ is 26 (mm), the receipt paper
1e will send 0.204 (mm) in one step. Therefore, sampled by detection of the mark sensor S ₂ for each step of the pulse motor M0, for example, the length of the black mark m M =
When the value is 4.5 mm, the set value D ₁ is 19, and if the black mark is sampled 19 times and is recognized as the black mark m, then L ₁ = 0.204 × 19 = 3.876≈3.88 (mm).

When the response delay of the mark sensor S ₂ is 5 ms, L ₂ = d × π × 1000 (PPS) / 400 × 5/1000 (sec) = 1.02 (mm) (where PPS is pulse-second) Feed roller If the pulse motor M0 requires 4 steps to stop R ₂ , L ₃ = d × π × 4/400 = 0.82 (mm). Therefore, L = L ₁ + L ₂ + L ₃ = 3.88 + 1.02 + 0.82 = 5.72 (mm).

Therefore, when A = 50 (mm), the set value D ₂ = 50− (5.72−4.5 / 2) ≈46.5 (mm). That is, when the receipt paper 1e is fed by 46.5 (mm) and stopped when the black mark m of the mark sensor S ₂ is detected, the substantially center of the black mark m becomes the cutting position.

The set value memory 12 stores the set value D read from the setting unit 10a.
_This is a memory that stores ₁ and D ₂ .

Further, 13 is a printer control circuit, 14a is a pulse motor control circuit, and 15 is a cutter drive circuit.

Since it has such a configuration and machine function, first, when the size of the character to be printed on the receipt paper 1d is designated by the designation button 9b, the corresponding set values D ₁ and D ₂ are read from the setting unit 10a and the set value is set. It is stored in the memory 12.

Under the control of the printer control circuit 13, the printer unit 7 prints on the receipt paper 1e.

Receipt paper 1e are fed the pulse motor M1 when printing is completed is driven, the black mark m by reading the setting value D ₁ of the set value memory 12 is detected by the mark sensor S _2.

Immediately after that, the set value D ₂ is read from the set value memory 12 and sent to the pulse motor control circuit 14, where the pulse motor M0
Driven and the feed roller R ₂ sets the receipt paper 1e to the set value.
Only D _{2 is} sent and stopped.

When stopped, the cutter control circuit 15 is activated and the cutter unit 6 cuts at the center position of the black mark m as shown in FIG. 5 (e). The cut receipt 1f is conveyed and issued by the feed roller R ₃ .

In this way, the black mark m remains in the corner of the receipt 1f by half the length of the mark but can be made small enough not to disturb the appearance.

Therefore, it does not require the use of perforated roll paper or a sprocket feeding method, and it has a simple mechanism and is cut at the center position of the black mark m on the roll paper, and slips on the feed roller R ₂ before detecting the black mark. Even if there is a receipt, it is possible to obtain a receipt 1f having a constant length from the black mark position.

〔The invention's effect〕

As described above, according to the present invention, the use of the continuous print medium placed in the perforations and the feeding method by the sprocket are not required, and the cutting is performed by a simple mechanism and at the center position of the black mark marked on the continuous print medium. Thus, there is an effect that the size of the mark can be reduced to reduce the defects in appearance.

[Brief description of drawings]

FIG. 1 is a block diagram of the principle of the present invention, FIG. 2 is a side view showing an embodiment of the present invention, FIG. 3 is a control block diagram of the embodiment, FIG. 4 is a timing chart of the embodiment, and FIG. 6 is a perspective view showing a conventional example (1), FIG. 7 is a perspective view showing a conventional example (2), and FIG. 8 is an explanatory diagram of a conventional example (2). is there. In the figure, 1a, 1c and 1e are receipt papers, 1b, 1d and 1f are receipts, 6 is a cutter section, 7 is a printer section, 8 is a main control section, 9 is a designation section, 9a is a keyboard, 9b is a designation button, 10, 10a is a setting unit, 11 is a detection unit, 12 is a set value memory, 13 is a printer control circuit, 14 is a medium transfer unit, 14a is a pulse motor control circuit, 15 is a cutter drive circuit, m and m1 are black marks, M0 is a pulse motor, R ₁ to R ₃ may feed roller, S _1, S ₂ denotes a mark sensor.

Claims (1)

[Claims] 1. A length which allows a maximum print character height to be distinguished from a maximum print character height at a predetermined interval after printing is performed on the continuous print medium transferred by a medium transfer section (12). A device for detecting a mark provided in a length obtained by adding the length by a detection unit (9) and cutting the continuous print medium at the center position of the mark based on the detection, wherein the mark is the detection unit. The detection unit (9) includes a setting unit (10) in which the amount of transfer of the continuous print medium from when the mark is detected to when the center of the mark is reached is reached. Based on the above, the print medium cutting device is characterized in that the set value is read from the setting section (10), the continuous print medium is transferred from the detection position by the set value, and then cut.