JPS6287376A - Paper feed controller - Google Patents

Abstract

PURPOSE:To enable a paper feed quantity at the time of line feeding to be controlled, by providing a controlling part for controlling paper feeding according to the pitch of horizontal ruled lines through controlling a pulse motor on the basis of data read from a memory which stores detection signals from a ruled line detecting sensor. CONSTITUTION:When feeding of a recording paper 1 is started, a horizontal ruled line 1' on the paper 1 is detected by a ruled line detecting sensor 4, ruled line detection signal is amplified by an amplifier 5, the amplified signal is converted into a digital signal, and then sampling signals are generated by sampling signal generator 7. When a predetermined number of the sampling signals are detected, the average of the signals is calculated by a controlling part 8, a line space is set, and is stored into a memory 9. When printing is started, it is constantly discriminated by the controlling part 8 whether or not line feeding is required. When it is detected that line feeding is required, preset line space data stored in the memory 9 are read into the controlling part 8, pulses supplied to a pulse motor 12 are controlled based on the data, and the recording paper is fed by an amount corresponding to the preset line line space.

Description

[Detailed Description of the Invention] <Industrial Application Field> The present invention relates to a paper feed control device at the time of line feed in a recording device that feeds recording paper by rotating a platen and prints on the recording paper by a print head. More specifically, the present invention is a paper feed control device for feeding recording paper on which horizontal ruled lines have been written in advance so that printed characters do not deviate from the horizontal ruled lines.

<Prior art> In conventional general recording devices, the operator himself or herself specifies the desired amount of paper feed at the time of line feed, that is, the line spacing of printed characters, using an input means such as key operation, before the printing operation. It looks like this.

<Problems to be Solved by the Invention> By the way, there is recording paper on which horizontal ruled lines are drawn at regular intervals before printing. When using such recording paper, the paper feed amount must be specified in accordance with the interval between horizontal ruled lines.
The problem that printed characters are misaligned with respect to horizontal ruled lines often occurs.

The present invention was made in view of the above-mentioned conventional problems and to solve the problems.The present invention detects the horizontal ruled lines of the recording paper before the recording operation and automatically sets the line spacing corresponding to the ruled lines. It is an object of the present invention to provide a paper feed control device that can control the paper feed amount at line feed based on a set value.

Means for Solving the Problems> In order to achieve the above object, the present invention provides a paper feed control device for a recording apparatus in which recording paper is fed by a platen and printing is performed by a print head, in which the platen is rotationally driven. a pulse motor that detects horizontal ruled lines pre-marked on the recording paper when the platen is rotated by a key operation; a memory that stores the detection signal of the ruled line detection sensor; The main feature of the present invention is to have a configuration including a control section that controls the pulse motor based on stored data read from the paper and controls paper feeding in accordance with the interval between the horizontal ruled lines.

<Function> With the above configuration, the operator can simply operate a key prior to the printing operation, and the horizontal ruled line is detected by the ruled line detection sensor when the platen rotates and the paper is fed, and the horizontal ruled line is detected based on the detection signal of the sensor. The interval between horizontal ruled lines is stored in memory. Therefore, when a printing operation is subsequently performed and a line feed occurs, the pulse motor is driven to rotate based on the stored data of the set line spacing read out from the memory.

<Embodiment> Hereinafter, a preferred embodiment of the present invention will be described in detail based on the drawings from FIG. 1 onwards.

In FIGS. 2 and 3, a print head 3 is located in front of the platen 2 that feeds the recording paper 1 (to the left in FIG. 3).
A ruled line detection sensor 4 is provided below the platen 2 for detecting horizontal ruled lines 1' on the recording paper 1.
is provided with its detection port facing the platen 2, that is, the recording paper 1. This detection sensor 4 is a light reflection sensor composed of a light emitting element and a light receiving element.

Next, FIG. 1 showing the block configuration will be explained with reference to FIG. 4 showing its operation flowchart. First, the operator inserts and sets the recording paper 1 (
A) When a standby command is issued by a key operation, the platen 2 is rotationally driven (B) and paper feeding of the recording paper 1 is started. At this time, the horizontal ruled line 1' of the recording paper 1 is detected by the ruled line detection sensor 4 (C). After this ruled line detection signal is amplified by the amplifier 5 and converted into a digital signal by the A/D converter 6, a sampling signal is generated by the sampling signal generator 7 (E). This sampling signal is C
At the same time, the control unit 8 determines whether a predetermined number of sampling signals have been detected (E), and if the predetermined number has not been detected, the process returns to flow (C). Similar operations are repeated until a predetermined number of sampling signals are detected.

When a predetermined number of sampling signals are detected, the control unit 8 calculates the average value of the predetermined number of sampling signals (F), and the line spacing is set based on this calculated value (G).
, are stored in a memory 9 consisting of a RAM. After that,
Through pulse control by the control unit 8, the platen drive circuit 1 is activated by a predetermined number of pulse signals output from the pulse generator 10.
) controls the rotation of the pulse motor 12, and the pulse motor 12
The platen 2 connected to is rotated in reverse (H), and the recording paper 1
is set to the initial position (1).

Once the recording paper 1 is set at the initial position, it enters a recording standby state, and when the operator performs a printing operation using the key 13 to start character input (J), printing is started by the print carriage shift ( K), When printing starts, the control unit 8 always determines whether or not it is time for a line feed after printing one digit worth of characters (L), and if it is not time for a line feed, the process returns to flow (J). The same operation is repeated until the line return is detected.

When it is detected that it is time for a line feed, a line feed command is generated from the control unit 8, and the set line spacing data stored in the memory 9 is read into the control unit 8 (M), and a pulse is generated based on this data. Generator 10. The platen drive circuit 1) and the pulse motor 12 are pulse-controlled, and the recording paper 1 is fed by a set line interval (N) and a line feed is performed.

After a line break, it is determined whether the recording operation is finished (O).
, then if the recording operation continues, the flow (J
), and the same operation is repeated until the recording operation is completed.

<Effects of the Invention> As is clear from the above description, according to the paper feed control device of the present invention, when recording on recording paper on which horizontal ruled lines have been drawn in advance, the paper feed amount can be controlled without the operator specifying the paper feed amount.
A horizontal ruled line is detected by a simple key operation, and the line spacing corresponding to the horizontal ruled line is automatically set, so it is extremely practical and allows characters to be printed without deviating from the horizontal ruled line without the need for complicated operations. You can get the effect.

[Brief explanation of drawings]

Each drawing shows an embodiment of the paper feed control device of the present invention. FIG. 1 is a block diagram, FIGS. 2 and 3 are perspective views and schematic right side views of main parts, and FIG. 4 is an operation flowchart. It is. 1-Recording paper 1'-Horizontal ruled line 2-Platen 3-Print head 4-Ruled line detection sensor 8-Control unit 9-Memory

Claims (1)

[Claims] (1) In a paper feed control device in a recording device that feeds recording paper using a platen and prints using a print head, a pulse motor that rotationally drives the platen and a pulse motor that rotationally drives the platen, and when the platen is rotated by a key operation, a pre-recorded image is written on the recording paper. a ruled line detection sensor that detects the horizontal ruled lines; a memory that stores the detection signal of the ruled line detection sensor; 1. A paper feed control device comprising: a control section that controls paper feed in accordance with the paper feed control device.