JPS6067184A - Recording paper supplying and feeding device for printer - Google Patents

Abstract

PURPOSE:To securely supply and feed a recording paper and print accurately at a predetermined position on the paper, by providing a fixed-velocity means for fixing the supplying and feeding velocity of the recording paper. CONSTITUTION:Recording paper 22 placed on a stacking means A are sequentially transferred by a pressure roller 24 and a paper-supplying roller 23, and when a plurality of the recording papers 22 are simultaneously transferred in an overlapped condition, one of the papers is separated by a separating means C. Then, the paper is passed between a feeding roller 28 and a driven roller 29 consituting the fixed-velocity means D, whereby the feeding velocity and the feeding direction are maintained to be fixed. Further, the passage of the paper 22 is detected by a paper passage sensor 33, 33', and a signal is outputted to a recording means E. The paper 22 is clamped between a printing roller 30 and an ink doner sheet 32, and when the paper 22 comes to a predetermined position, a thermal head 31 is operated to generate heat on the basis of digital signals, whereby the ink doner sheet 32 is heated, and an ink is melted and is adhered to the recording paper 22.

Description

DETAILED DESCRIPTION OF THE INVENTION (Technical Field) The present invention relates to a printer as an output device for information processing, and more particularly to a recording paper feeding device for a printer such as a copying machine or a facsimile machine.

(Prior Art) In general, in information processing, printers are used to record numbers, characters, etc. corresponding to digital information on recording paper to obtain a hard copy. As such a printer, for example, the Monoku Unexamined Patent Publication No. 5, shown in Fig.
7-96882). In the figure, the recording paper stacked on the automatic paper feed tray 5 is fed to the lower right in the figure by the automatic paper feed guide 6 provided with two feed rollers 7 and 7', and the leading edge of the paper is fed to the feed roller 7. When it reaches point ', it rotates in the same direction as the feed roller 7' in close proximity to the circular surface of the feed roller 7' and passes between it and the tart roller 10. At this time, even if the paper was previously separated, it is separated into only one sheet.

When a sheet of paper is further fed and begins to pass between the registration sensors 14, 14', the ink donor sheet transport motor 11 is activated by a signal from this sensor 14, 14'. When the leading edge of the paper that has passed between the registration sensors 14 and 14' advances further, it later passes through the printing feed roller 1.
5 and the ink donor sheet 3, and the motor 1
1 and passes over the thermal head assembly 4 intermittently. At this time, information is recorded on the recording paper line by line based on signals input to the thermal head assembly 4 from a device not shown.

However, in the device for feeding the recording paper of such a conventional printer, the feed roller 7' and the tart roller 10 separate the recording paper into only one sheet.
The recording paper that has passed between the register sensor 14 and 14'
Immediately after passing through the gap, the ink donor sheet 3 is wound up between the printing feed roller 15 and the ink donor sheet 3, and information is recorded at a predetermined printing position. For this reason, the feeding speed and feeding direction of the paper are not determined, and the paper may not be recorded at the predetermined printing position and be shifted, or may not be caught between the paper printing feed roller 15 and the ink donor sheet 3. It happened often.

(Objective of the Invention) Therefore, the present invention aims to ensure that the feeding speed and feeding direction of the separated recording paper, which is completely limited to only one sheet, is constant, thereby ensuring reliable feeding of the recording paper, and The purpose is to accurately print and record in a predetermined position.

(Configuration of the Invention) The configuration of the present invention will be described below based on the embodiments shown in the drawings.

FIG. 2 is a diagram showing a first embodiment of the present invention.

First, to explain the structure, in the same figure, 21 is a paper feed table, and this paper feed table 21 is provided with a paper feed roller blade extending through it. It protrudes slightly higher than the second side of ``21''. Above the paper feed table 21 and slightly downstream of the paper feed roller blade (
A stopper 25 is arranged substantially perpendicularly to the paper feed table 21 (right side in the figure). An L-shaped recess is formed above the paper feed table 21 and upstream of the stopper 25;
A plurality of recording sheets 22 to be fed to a recording device E, which will be described later, are stacked on these four parts. Therefore, the paper feed table 21
Both the stopper 25 and the stopper 25 constitute a stacking means A for stacking recording sheets. A pressure roller that presses the recording paper 22 downward is arranged above the recording paper 22 stacked on the stacking means A, and when the paper feed roller holder transfers the recording paper 22 downstream, the paper feed roller % and the recording paper 22 so that a frictional force is generated. The paper feed roller is rotated clockwise in the drawing by a drive motor (not shown), so that the recording paper 22 in the stacking means A can be sequentially transferred downstream from the lowest layer.

Therefore, the paper feed roller, the pressure roller, and the drive motor (not shown) constitute the transfer means B as a whole. The paper feed table 21 extends further downstream from the paper feed roller blade, and its downstream end is bent in a substantially vertical direction. The folded part of the paper feed table 21 has a minute p
A Hl roller 26 is provided, and the circumferential surface of the separation roller 26 protrudes slightly outward from the outer circumferential surface of the bent portion of the sheet feeding table 21. A separating member 27 is close to this protruding peripheral surface of the separating roller 4, and when a plurality of recording sheets 22 are simultaneously transferred between the separating roller and the separating member 27, the recording sheets are separated by the separating roller 4. Only one recording paper 22 is separated and sent downstream, and the other recording papers 22 are blocked by a separating member 27. The separation roller A is driven by a drive motor (not shown) and rotates clockwise in the drawing, separating the plurality of recording sheets 22 into one sheet.

Therefore, the bent portion of the paper feed tear-pull 21, the separation roller 26, the separation member 27, and the drive motor (not shown) are as follows.
The separation means C is constituted as a whole. On the downstream side of the downstream end of the paper feed table 21, there is a conveyance roller 28 driven clockwise in the figure by a drive motor (not shown), and a driven roller that rotates in tandem with the conveyance roller 4 and the recording paper 22. The rollers 29 are arranged close to each other. The above amount Al
The recording paper 22 that has passed through the first means C passes between the conveying roller U and the driven roller 29, so that its feeding speed and feeding direction are kept constant.

Therefore, the conveyance roller 28, the driven roller 29, and the drive motor (not shown) collectively constitute a constant speed means. The feeding speed of the recording paper 22 is such that the feeding speed increases sequentially as it passes through the paper feed roller, the separation roller 26, and the conveyance roller blade. Paper passing sensors 33 and 33' are arranged downstream of the conveyance roller and the driven roller 29, and between these paper passing sensors 33 and 33', light, etc. is transmitted from one side to the other at one point in the figure. It is always transparent on the dashed line. When the recording paper 22 enters between the paper passing sensors 33 and 33' and blocks the transmission of the light, etc.,
The paper passing sensors 33, 33' have the recording paper 22 between them.
It detects that there is a recording device E and outputs a signal to a recording device E, which will be described later, to operate the recording device E. A printing roller 30 is installed downstream of the paper passage sensor 33, 33'.
A thermal head 3I is disposed below the printing roller 30 in the figure in contact with it via an ink donor sheet 32. A drive motor (not shown) moves the printing roller 30 counterclockwise, and the ink donor sheet 32 moves from the left upstream side in the figure to the right downstream side in the figure.
Driven intermittently. The thermal head 31 is
2 comes to a predetermined position and stops, it generates heat based on a digital signal input from a device not shown, heats the ink donor sheet 32, fuses the ink to the recording paper 22, and visualizes the digital information. It has become. Therefore, the printing roller 30. The thermal heel F31, the ink donor sheet 32, and a drive motor (not shown) constitute a recording apparatus E as a whole. A one-way clutch (not shown) is interposed between the conveyance roller 28 and the shaft that supports it, and when the recording m22 is sent line by line by the print roller 30 and the ink donor sheet 32 and is printed and recorded. In addition, the conveyance roller 28 is designed not to become a load and prevent the smooth feeding of the recording paper 22.

Next, the effect will be explained.

First, the recording paper 22 is loaded on the debt loading means A. The recording paper 22 is pressed from above by a pressure roller, and is sequentially transferred downstream from its lowest layer due to the frictional force between it and the paper feed roller. The recording sheets 22 are transferred one by one, but if a plurality of recording sheets 22 are transferred at the same time, the separation means C separates only one sheet. Next, the recording paper 22 passes through the constant speed means ii1, so that its feeding speed and feeding direction become constant. When the leading edge of the recording paper 22 reaches the position shown by the dashed line in the figure after being further fed, the paper passing sensor 33.33
', it is detected that the recording paper 22 has begun to pass between them, and a signal is output to the recording means E. The recording means E receives a signal from the paper passage sensor 33, 33' and rotates the motor that drives the printing roller 30 and the ink donor sheet 32, and the thermal head 31 communicates with a device not shown to print and record. Prepare yourself for this. The recording paper 22 is further fed passing between the paper passing sensors 33 and 33', and its leading end is fed between the printing roller 30 and the ink donor sheet 32. The recording paper 22 is held between a printing roller 30 and an ink donor sheet 32 and is intermittently fed line by line. In this way, when the recording paper 22 reaches the predetermined position where the first line is to be recorded, the thermal head 31 generates heat based on a digital signal input from a device not shown, heats the ink donor sheet 32, and prints the recording paper. The ink is fused to 22. By repeating this operation line by line, the digital information can be visualized and the information can be converted into a hard copy. Since the recording paper 22 is reliably fed between the printing roller 30 and the ink toner sheet 32 at a constant speed and direction by the constant speed means, the recording paper 22 is printed at an accurate predetermined position and recorded. can be done.

The separating means C need not be limited to the structure shown in this first embodiment, and may have any other structure as long as it can separate a plurality of recording sheets 22 into one sheet.

FIG. 3 shows a second embodiment of the invention.

In the first embodiment described above, a case was explained in which the conveying roller 2B and the driven roller 29 were used as the constant speed means, but in this second embodiment, instead of them, a separation roller 29 and the recording paper are pressed against it. A pressure roller 38 is used.

The pressure roller 3B presses the recording paper 22 against the separation roller 29 and rotates with the separation roller 26 via the recording paper 22. The recording paper 22 is constantly and reliably fed between the printing roller 30 and the ink donor sheet 32. In such a constant speed means,
As shown in FIG. 4, the member pressed against the separating roller 26 in this second embodiment is not necessarily a roller, but may be a metal plate or plastic. A plate material such as a plate may be pressed. With this structure, the recording paper 22
It is possible to keep the feed speed and direction constant.

Further, the number of pressure rollers 38 is not necessarily limited to two, and may be one or three or more.

(Effects of the Invention) As described above, according to the present invention, it is possible to reliably feed the recording paper to the recording device, and it is also possible to accurately print and record at a predetermined position on the recording paper. .

[Brief explanation of drawings]

FIG. 1 is a cross-sectional side view showing a conventional printer's recording paper feeding device, FIG. 2 is a schematic side view showing a first embodiment of the printer's recording paper feeding device according to the present invention, and FIG. Second invention
A schematic side view showing the embodiment, FIG. 4 is a view taken along the line IV-IV of the constant speed means in FIG. 3. 21-----Paper feed table, 22------Recording paper, 1st paper-feed roller, 24---Pressure roller, 25--Stopper, 26-- -・-Separation roller, 27-・-Separation member, Japan---111 conveyance roller, 29-・-・-driven roller, 30----1 printing roller, 31-111・- Thermal head, 32- ・- Ink donor sheet, 33. 33' --- Paper passing sensor, 38- ・・
- Pressure roller, A' - - - Loading means, B - - Transfer means, C - - Separation means, D - Constant speed means, E - - - - One Recording means. Patent applicant: Ichinoko Co., Ltd. 331 Toshi 33'

Claims (1)

[Claims] A loading means for loading recording paper to be fed to a recording device that records information on recording paper, a transfer means for taking out the recording paper from this loading means and transferring it, and ultimately limiting the number of recording papers to be transferred to one sheet. A printer comprising a separating means for separating and feeding the paper to the recording device, and a paper passage sensor disposed between the separating means and the recording device to detect passage of recording paper and operate the recording device. In the recording paper feeding device, a constant speed means is provided between the separation means and the passage sensor or in contact with the separation means via the recording paper to keep the feeding speed of the recording paper constant. A recording paper feeding device for a printer, characterized in that: