JP2701894B2 - Recording device using roll paper - Google Patents

Description

Description: BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a recording apparatus using roll paper, and for example, to a recording apparatus such as a facsimile apparatus and a printer.

<Prior Art> A facsimile apparatus is known in which a thermosensitive roll paper is used as a recording paper and a roll paper on which data is recorded is cut by a cutter. In this type of apparatus, the roll paper main body is housed in a freely rotatable manner, and when the leading end of the roll paper is pulled, the main body rotates and the roll paper can be further pulled out.

FIG. 3 is a view for explaining an operation of recording data on a thermal roll paper in this type of apparatus. Referring to FIG. 3, when the data recording operation starts from the state (A), the leading end of the roll paper is pulled by the platen roller 1, and data is printed on the roll paper by the thermal head 3. When the leading end of the roll paper is pulled, the roll paper main body 4 rotates on its own, and the roll paper is sent out. The leading edge P1 of the roll paper on which the data is recorded passes through the cutter 5 and is sent out of the machine by the discharge roller 6 (B).

Next, even after the data recording is completed, the transport of the roll paper is not immediately stopped, but the roll paper is transported until the rear end of the data recording section passes through the cutter 5. When the rear end of the data recording section has passed the cutter 5, the cutter 5 is operated and the roll paper is cut (B).

Next, the roll paper is further transported after being cut, and the transport is stopped when the data recording unit is discharged from the discharge roller 6 (C). This is because the platen roller 1 and the discharge roller 6 are usually driven by a common stepping motor. Next, from the state of (C), the platen roller 1 and the discharge roller 6 are rotated in the reverse direction, and the leading end of the roll paper from which the data recording section has been cut is
The state is returned to the state of FIG.
And the thermal head 3. In this state, as shown, the returned roll paper P2 is loose.

Next, when the recording of data is started from the state (D), the transport of the slack roll paper starts first, the slack of the roll paper gradually disappears, and the roll paper main body 4 is rotated on its own.

<Problems to be Solved by the Invention> By the way, during the transport of the roll paper, at the moment when the roll paper is not slackened and the roll paper main body 4 starts to rotate,
A large load is suddenly applied to the roll paper being transported. This sudden change in load applied to the roll paper imposes a heavy load on a stepping motor (not shown) that drives the platen roller 1 and the discharge roller 6. As a result, the stepping motor is out of step or slightly out of step for a very short period of time. For this reason, the transport speed of the fixed roll paper fluctuates, and printing is slightly disturbed. However, the stepping motor step-out is immediately resolved, and the printed content returns to normal. However, it is necessary to prevent the printing sun from being disturbed even momentarily.

The present invention has been made in view of such a background, and aims at replacing the stepping motor with a large one, without increasing the price of the apparatus or increasing the size of the apparatus by using a motor with a large torque, and the like. An object of the present invention is to provide a recording apparatus using roll paper that can prevent instantaneous printing disturbance.

<Means for Solving the Problems> According to the present invention, the roll paper main body can be housed in a free-rotating state, and the roll paper main body rotates by pulling the leading end of the roll paper coming out of the roll paper main body, so that the roll paper is rotated. A roll paper storage unit adapted to be drawn out, a transport unit for pulling out and transporting the roll paper from the roll paper storage unit, and a recording unit for recording data on the roll paper being transported by the transport unit A timing discriminating means for discriminating a timing at which the roll paper main body stored in the storage means starts to rotate as the conveying means starts to convey the roll paper by pulling out the roll paper; and And a speed control means for lowering the transport speed of the transport means before and after the roll paper body starts rotating. This is a recording device using paper.

<Operation> Immediately before the roll paper main body starts rotating, the transport speed of the transport unit is decreased from the normal speed and the transport force of the transport unit is increased, so that a sudden load is applied to the roll paper being transported. The transport control speed is not disturbed. If the transport speed of the transport unit is reduced, the operation of the recording unit is also reduced accordingly.

An embodiment of the present invention will be described below in detail with reference to the drawings.

The schematic configuration of this embodiment is the same as the configuration of FIG. 3 already described. FIG. 2 is a block diagram showing the configuration of the control circuit according to this embodiment.

Referring to FIG. 2, the control circuit of this embodiment includes a CPU 10, a ROM 11 storing an operation program thereof is connected to the CPU 10, and a RAM 12 capable of reading and writing data is connected to the CPU 10. ing. The RAM 12 includes an area that functions as the step counter 13.

The CPU 10 also includes a stepping motor 14 for driving the platen roller 1 and the discharge roller 6,
And a print head (thermal head) 3, which are operated based on a control signal from the CPU 10.

FIG. 1 is a flowchart showing the operation of this embodiment.

Next, the operation of this embodiment will be described with reference to FIGS.

By starting the recording operation, the CPU 10
4 is rotated forward at the rotation speed S (step S1). The forward rotation of the stepping motor 14 starts the conveyance of the roll paper. At the start of the conveyance, the roll paper is assumed to have slack as shown in FIG. 3 (D).

Next, the CPU 10 starts printing with the thermal head 3 (step S2). Further, the CPU 10 counts the number of forward rotation steps of the stepping motor 14 using the step number counter 13, and when the number of steps becomes (N−ΔN) (step S3), the rotation speed of the stepping motor 14 is set to S.
The control is performed to decelerate from S to S ′ and return to the original rotation speed S again (step S4). Here, N is determined based on the fact that the stepping motor 14 has been reversed by N steps in the previous processing, as described later. Note that ΔN is one to several steps. In this way,
During this rotation speed S ', the timing is set so that the roll paper is not slackened and the roll paper main body 4 starts rotating. Therefore, even if the load accompanying the start of rotation of the roll paper main body 4 is applied to the roll paper, the rotation speed of the stepping motor 14 is reduced to the rotation speed S ′ lower than the normal speed at that time. , The stepping motor 14 does not step out or tends to step out due to the load.

Thereafter, the rotation speed of the stepping motor 14 is returned to the normal speed S again (step S5). After the printing is completed (Step S6), the rear end of the printing section is transported to the cutter 5 (Step S7). Then, the CPU 10 drives the cutter 5 to cut the roll paper (step S8).

Further, the conveyance is continued until the data printing section is completely discharged from the discharge roller 6 (step S9). When the recording paper on which the data is printed and the cut recording paper is discharged, the CPU 10 starts the reverse rotation of the stepping motor 14. (Step S1
0). Then, the stepping motor 14 is rotated reversely by N steps (step S11) and stopped (step S1).
2). At this time, the roll paper 2 returns to the state shown in FIG. 3 (D).

In the above-described embodiment, the roll paper is described as being in a slack state when the stepping motor 14 starts rotating.
The same applies to the case where the roll paper is not loose. That is, when the roll paper main body 4 starts rotating, the transport load is large, so that the initial speed of the stepping motor 14 may be reduced and the torque thereof may be increased so as not to be affected by the load.

<Effects of the Invention> Since the present invention is configured as described above, when the roll paper main body starts rotating, even if the transport load increases with the start of rotation of the roll paper main body, the transport load increases. The transport control speed is not disturbed, and data recording on roll paper is not disturbed.

In addition, the present invention prevents disturbance of data recording due to load fluctuation only by controlling the speed of the conveying means,
The device can be manufactured at low cost.

[Brief description of the drawings]

FIG. 1 is a flowchart showing the operation of one embodiment of the present invention. FIG. 2 is a block diagram showing a control circuit configuration of one embodiment of the present invention. FIG. 3 is an illustrative view for explaining roll paper conveyance and printing operation in a general recording apparatus. In the figure, 1 ... platen roller, 3 ... thermal head as print head, 4 ... roll paper body, 10 ...
CPU, 14 ... stepping motor.

 ──────────────────────────────────────────────────続 き Continuation of front page (72) Inventor Nobuyuki Kashiwagi 1-2-2, Tamazo, Higashi-ku, Osaka-shi, Osaka Inside Mita Kogyo Co., Ltd. (56) References JP-A-63-123752 (JP, A)

Claims (1)

(57) [Claims] A roll capable of storing a roll paper body in a freely rotatable state, and rotating the roll paper body by pulling the leading end of the roll paper coming out of the roll paper body so that the roll paper can be further pulled out. Paper storage means, transport means for pulling out and transporting roll paper from the roll paper storage means, recording means for recording data on roll paper being transported by the transport means, and the transport means being a roll paper With the start of the conveyance of the roll paper, the roll paper main body rotates based on the determination by the timing determination means for determining the timing at which the roll paper main body stored in the storage means starts to rotate. And a speed control means for lowering the transport speed of the transport means before and after the paper is ejected from the normal speed.