JPH03259852A - Chart setting mechanism - Google Patents

Abstract

PURPOSE:To enable it to make a chart circumference contact with a separate piece irrespective of a winding diameter by pressing a movable idler roller to a rolled chart with a spring at all times. CONSTITUTION:A rolled chart 1 is placed on a pan 5. Whether a winding diame ter of this chart 1 is in an unused state 1b or used state 1a, a movable idler 10 is brought into pressure contact with a peripheral surface of the chart 1 by a pressing spring 12 attached to an idler holding lever 11. Accordingly, it is surely pressed by a driving roller 2 for the chart 1 as well, while the periph eral surface of the chart 1 is made contact with a separate piece 4 too. Then, the chart 1 is also rotated in an A direction by rotation of the driving roller 2, and a winding terminal on the peripheral surface is separated by the separate piece 4 and fed to both printing parts 8, 9.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to an automatic loading mechanism for a roll of recording paper in a thermal recording type facsimile machine.

[Conventional technology]

FIG. 2 is a schematic diagram showing a conventional recording paper mounting mechanism disclosed in, for example, Japanese Utility Model Application No. 61-157557, in which (1) is a roll of recording paper, (2) is a recording paper drive roller, (3) is an idler roller that holds the roll of recording paper (1) and rotates it with the recording paper drive roller (2). Separation piece, (5) is a tray for recording paper, (6
) is the lower guide to the printing section, ('7) is the upper guide, (8
) is a thermal head, and (9) is a platen roller for pressing and driving the thermal head (8).Next, the operation will be explained. When the roll of recording paper (1) is placed on the recording paper tray (θ), the roll of recording paper (1) held by the recording paper drive roller (2) and idler roller (3) is placed on the recording paper drive roller ( 2 rotates in the direction of arrow A. At this time, the tip of the separation piece (4) is in contact with the outer peripheral surface of the roll-shaped recording paper (1), and the tip, that is, the winding of this roll-shaped recording paper (1), When the end reaches the separation piece (4), it is separated from the cylindrical surface, and further, due to the rotation of this roll-shaped recording paper (1), the leading edge advances between the lower guide (6) and the upper guide ('7), Thermal head (8)
It is sandwiched between the platen roller (9) and becomes ready for printing.

[Problem to be solved by the invention]

(2'1) Since the conventional recording paper loading mechanism is configured as described above, it is possible to automatically load unused new rolls of recording paper, that is, those with a certain roll diameter. If the diameter of the roll is smaller than that, it will not come into contact with the separation piece (4), so there is a problem that automatic loading cannot be performed when using recording paper of a different size, recording paper that is in the middle of being used, or after clearing a paper jam. there were.

This invention was made in order to solve the above-mentioned problems, and provides a recording paper loading mechanism that can always automatically load the recording paper by properly contacting the separation piece regardless of the winding diameter of the roll of recording paper. The purpose is to

[Means to solve the problem]

The recording paper mounting mechanism according to the present invention uses a spring to press a movable idler roller against the roll of recording paper, thereby adjusting the position of the roll of recording paper relative to the fixed separation piece regardless of its winding diameter. This is to ensure proper contact.

[Effect]

In this invention, the movable idler roller is pressed against the roll of recording paper from below by a spring, and since the smaller the winding diameter of the roll of recording paper, the lighter its weight, the force of the spring raises the roll of recording paper. By lifting, it is possible to keep the separated piece in contact with the rolled recording paper at all times.

〔Example〕

An embodiment of the present invention will be described below with reference to the drawings. 1st
The figure is a schematic diagram, and the same or corresponding parts as those of the conventional one are given the same reference numerals, and the explanation thereof will be omitted. In the figure,
(1) is a roll of recording paper, a half-used roll of recording paper is shown as (1a), and an unused roll of recording paper is shown as (1a).
It is shown in b). (10) is a movable idler roller whose position is (1a) with respect to recording paper (1a) during use.
0a), and the position with respect to the unused recording paper (1b) is shown as (IOb). (11) The idler holding lever (12) is an idler suppression spring.

Next, the operation will be explained. Place the roll of recording paper (1) on the recording paper tray (5). At this time, roll recording paper (1
) is in the unused state (1b) or in the middle of use (1a), the idler holding lever (11
) The pressing force of the movable idler roller (10) by the idler suppression spring (12) attached to The position of the movable idler roller (10) is such that the outer peripheral surface of the roll of recording paper (1) is kept in contact with the separation piece (4), and at the same time, the position of the recording paper drive roller (2) is
Make sure to apply pressure to the

After that, by rotating the recording paper drive roller (2), the rolled recording paper (1) is rotated in the direction of the arrow A, and at this time, the end of the winding on the outer peripheral surface of the rolled recording paper (1) is separated. The piece (small) is peeled off, and the lower guide (6
) and the upper guide ('7), and is eventually sandwiched between the thermal head (8) and the platen roller (9), completing the loading of the recording paper.

〔Effect of the invention〕

As described above, according to the present invention, since the idler that holds the recording paper is made movable and has a pressing mechanism using a spring, a recording paper mounting mechanism that does not depend on the winding diameter of the recording paper can be provided at a low cost. You can get the effect that you can.

[Brief explanation of drawings]

FIG. 1 is a schematic diagram showing a recording paper mounting mechanism according to an embodiment of the present invention, and FIG. 2 is a schematic diagram showing a conventional recording paper mounting mechanism. In the figure, (1) is a roll of recording paper, (2) is a recording paper drive roller, (4) is a separation piece, (8) is a thermal head, (9) is a platen roller, and (10) is a movable idler roller. , (11) indicates that the idler holding lever (12) is an idler pressing spring. Note that the same reference numerals in the figures indicate the same or equivalent parts.

Claims (1)

[Claims] (1) After rotating the recording paper while keeping a separating piece in contact with the outer circumferential surface of the roll of recording paper and peeling off the end of the recording paper roll, the recording paper loading mechanism that leads it to the recording section adjusts the diameter of the recording paper. A recording paper mounting mechanism characterized in that the outer circumferential surface of the recording paper is always brought into contact with a separation piece without any interference.