JPH01118459A - Printer - Google Patents

Abstract

PURPOSE:To largely reduce an operator's load by rotating a motor reversely until the end of a continuous sheet is detected by detecting means and rotating the motor forwardly until the head of second page of the continuous sheet is detected by detecting means when a designation signal is output. CONSTITUTION:A CPU 14 inputs the fact that a switch 8 (20) is ON from an I/O port 7. Then, when an operator turns ON a switch 9 on an operation panel, the CPU 14 inputs the fact that the switch 9 is ON from the port 7. Then, the CPU 14 outputs a control signal to a motor controller 2 to rotate a motor 5, thereby reversely feeding a sheet 17 until the switch 8 (20) is turned OFF. The CPU 14 so rotates the motor 5 that the head E2 of the second page of the continuous sheet 7 is disposed at a printing position, i.e., between a printing head 15 and a platen roller 15. The feeding distance of the sheet 17 in step 5 is stored in advance in a memory 13.

Description

DETAILED DESCRIPTION OF THE INVENTION [Object of the Invention] (Industrial Application Field) The present invention relates to a printing device that conveys a continuous sheet of paper after printing while being pulled by a group of circularly moving protrusions.

(Prior Art) Conventionally, printing devices equipped with a pull tractor that transports continuous paper after printing while pulling it with a belt with protrusions that moves around it have been widely used.

By the way, when using a pull tractor, before starting printing, it is necessary to feed the top of the second page of paper between the head and the platen roller (printing position) (initial positioning).

For this reason, in conventional printing devices, it is necessary to set the paper on the tractor and then manually rotate the platen knob or keep pressing the paper feed switch until the paper reaches the top position of the second page.

(Problems to be Solved by the Invention) As described above, the conventional printing device equipped with a pull tractor has a problem in that setting paper is complicated.

The present invention was made in view of the above circumstances, and an object of the present invention is to provide a printing device equipped with a pull tractor that facilitates the setting of paper and reduces the burden on the operator.

[Structure of the Invention] (Means for Solving the Problems) In order to achieve this object, the present invention provides a printing device that conveys continuous paper having feed holes by pulling it with a group of circularly moving protrusions. a motor that rotates the group in forward and reverse directions; a detection means that is provided at a position after passing the printing position and detects the presence of the leading edge of the continuous paper;
When the continuous paper is attached to the protrusion group and a predetermined instruction signal is input, the motor is rotated in the opposite direction to convey the continuous paper in the reverse direction until the leading edge is no longer detected by the detection means. and a control means for controlling the motor to rotate in the forward direction to transport the continuous paper in the forward direction until the top of the second page of the continuous paper is detected by the detection means. be.

(Function) In the printing device of the present invention, when the continuous paper is attached to the group of protrusions and, for example, a switch on the operation panel is pressed to output an instruction signal, the leading edge of the continuous paper is detected by the detection means. The motor rotates in the reverse direction until it is no longer detected, and then the motor rotates in the forward direction until the top of the second page of the continuous paper is detected by the detection means, so that the initial positioning of the paper is automatically performed. It will be held in

(Example) Hereinafter, details of an example of the present invention will be described based on the drawings.

FIG. 1 is a block diagram showing the configuration of an embodiment of the present invention.

In the figure, 1 is an input interface that inputs signals necessary for printing from the host system, 2 is a motor driver 4 that drives the motor 3 for moving the carriage, and a motor that drives the motor 5 that moves the protruded belt of the pull tractor around. This is a motor controller that controls the driver 6.

Further, 7 is an I10 port that inputs instruction signals from a switch 8 (described later) for detecting the leading edge of the paper and a switch 9 provided on the control panel of the printing device, and 10 is for controlling the head driver 12 that drives the print head 11. This is a print head controller.

Furthermore, 13 is a line buffer and control program RO.
14 is a CPU that centrally controls the entire device.

In this embodiment, the CPU 14 operates according to a control program stored in the memory 13 and controls the entire apparatus.

The CPU 14 changes the states of the switches 8 and 9 to I1.
0 boat 7, outputs a control signal to the motor controller 2 according to the states of the switch 8 and the switch 9, and outputs a control signal to the motor controller 2 via the motor driver 6 to drive the tractor drive motor 5.
Rotate.

FIG. 2 is a diagram showing the structure of the mechanical parts in this embodiment.

In the figure, 15 is a print head, 16 is a platen roller, 17 is continuous paper with feed holes punched on both sides in the conveyance direction, El is the leading edge of the first page of continuous paper 17, and E2 is 2nd page of continuous paper 17. At the beginning of the page, 18 is a belt with protrusions that moves around by an inner sprocket (not shown) to feed the continuous paper 17, and 19 is a belt with protrusions that moves the continuous paper 17 to the belt 18 with protrusions.
A presser plate 20 fixed to is a switch provided near the protruding belt 18 to detect the leading edge E1 of the continuous paper 17. Note that the switch 20 is the switch 8 in FIG.
Applies to. Although not shown in FIG. 2, switch 9 in FIG. 1 is a switch located on the operation panel, and when turned on, instructs automatic positioning mode.

In FIG. 2, the continuous paper 17 is fed in the forward or reverse direction by the operation of the protruding belt 18, and the switch 20 is in the ON state when the continuous paper 17 is above the switch 20, and in the OFF state when there is no continuous paper 17. Become.

FIG. 3 is a flowchart showing the operation of the apparatus of this embodiment.

In this embodiment, the operator first manually inserts the continuous paper 17.
When the protruding belt 18 is inserted through the feed hole and the presser plate 19 is closed, the switch 8 (20) is turned on.

The CPU 14 connects this switch 8 (2
0> is in the ON state (step 1).

Next, when the operator turns on the switch 9 on the operation panel, the CPU 14 inputs from the I10 board 7 that the switch 9 is on (step 2).

Then, the CPU 14 outputs a control signal to the motor controller 2, rotates the motor 5, and turns the switch 8 (20) to OFF.
Reverse feed the paper 17 until it reaches the FF state (step 3
．． 4).

When the switch 8 (20) is turned off, the CPU 14 turns the motor 5 so that the top E2 of the second page of the continuous paper 17 is at the printing position, that is, between the printing pad 15 and the platen roller 16. Rotate (Step 5)
.

Note that the amount by which the continuous paper 17 is to be fed in step 5 is stored in the memory 13 in advance.

Thus, in the printing apparatus of this embodiment, after setting the continuous paper on the pull tractor, simply turning on the switch 9 on the operation panel automatically moves the top E2 of the second page to the printing position.

In this embodiment, the automatic sheet alignment is started by the switch 9 on the operation panel, but this operation may also be started by an instruction from the host computer.

Further, in this embodiment, the switch 8 (20) is provided near the protruded belt 18, but the switch 8 (20>
The position may be any other position as long as it is a position after passing the printing position.

[Effects of the Invention] As explained above, in the printing device of the present invention, the top of the second page of continuous paper automatically moves to the printing position, so the burden on the operator is significantly reduced.

[BRIEF DESCRIPTION OF THE DRAWINGS] FIG. 1 is a block diagram showing the configuration of a control system of an apparatus according to an embodiment of the present invention, FIG. 2 is a diagram showing the configuration of an am system of the apparatus according to the embodiment, and FIG. It is a figure showing operation of an example device. DESCRIPTION OF SYMBOLS 1... Input interface, 2... Motor controller, 3.5... Motor, 4.6... Motor driver, 7... I10 boat, 8.9.20... Switch, 10.・・Print head controller, 11.15
...Print head, 12...Head driver, 13.
...Memory, 14...CPU, 16...Platen roller, 17...Continuous paper, 18...Protruded belt,
19... Presser plate.

Claims (4)

[Claims] (1) In a printing device that conveys continuous paper having feed holes by pulling it with a group of protrusions that move in a circular direction, a motor that moves the group of protrusions in a circular motion in forward and reverse directions and a motor that is installed at a position after passing the printing position is provided. detecting means for detecting the presence of the leading edge of the continuous sheet of paper; and when the continuous sheet of paper is attached to the protrusion group and a predetermined instruction signal is input, the motor is rotated in the opposite direction so that the leading edge of the continuous sheet of paper is detected. The continuous paper is conveyed in the reverse direction until it is no longer detected by the means, and then the motor is rotated in the forward direction to transport the continuous paper in the forward direction until the top of the second page of the continuous paper is detected by the detection means. 1. A printing device comprising: a control means for controlling the printing device to convey the printing device. (2) The printing device according to claim 1, wherein the instruction signal is input based on the state of a switch on an operation panel. (3) The printing device according to claim 1, wherein the instruction signal is input from a host computer. (4) The printing device according to claim 1, wherein the detection means is provided near the group of protrusions.