JPH036714B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a paper winding device for a facsimile machine or a printer device using a drum rotation scanning recording method, which has functions for automatically supplying, cutting, and winding recording paper (roll paper).

First, an example of a conventional paper winding device will be described with reference to FIG. 1 is a drum, 2 is a bar for clamping the leading edge of paper, 3 is a cutter, 4 is a paper feeding roller, 5 is a recording paper, and 6 is a feeding path. In this configuration, the recording paper 5
is fed by the paper feed roller 4, guided to the feed path 6, and the edge of the paper is inserted under the bar 2, the paper feed roller 4 stops, the bar 2 closes and clamps the edge of the paper, The cutter 3 cuts the recording paper. The cutting length of the recording paper, that is, the distance S between the bar 2 and the cutter 3 is made to correspond to the circumferential length of the drum 1.

Therefore, when the device has a large screen, the diameter of the drum 1 increases and the distance S increases, so the shape of the device (for example, the length in the horizontal direction in the figure) also increases. Since miniaturization is generally required, conventionally,
For example, after the end of the recording paper is inserted under bar 2,
By rotating the paper feed roller 4 at a certain angle, the bar 2 and
There is a method of reducing the distance S by greatly bending the paper between the cutters 3,
(roll paper) is placed above or below the feeding path 6. However, since these methods naturally increase the height of the device, they are not preferred methods when miniaturization is also required in terms of height.

The present invention was made in view of the above circumstances, and
It is an object of the present invention to provide a paper winding device that achieves shortening of the distance S, that is, the feeding path, by a method that does not lead to an increase in height. Hereinafter, one embodiment of the present invention will be described based on the drawings.

FIG. 2 is a block diagram of the main parts of this embodiment, showing the standby state of the apparatus. The drum 1 is fixed to a drum shaft 7, and is stopped at a fixed position by a stop lever 9 engaged with a drum stop cam 8, which is also fixed to the drum shaft 7. The stop lever 9 is rotatably supported by a lever shaft 10, and is given a counterclockwise rotational force by a spring 11. The cam 13 fixed to the camshaft 12, which is driven at the same speed as the drum shaft 7 during rotation, is configured to rotate by a fixed angle by a rotation control mechanism (not shown) for each rotation command, and the rotation causes Then, the stop lever 9 is displaced. By this displacement, the stop lever 9 locks and releases the stop cam 8, and also turns the sensor 14 on and off.
ON/OFF of sensor 14 is controlled by control circuit (not shown)
It turns ON and OFF an electromagnetic clutch (not shown) that connects and disconnects the rotational input of the drum shaft 7 via the controller, and at certain times (described later) issues a disconnection command to the cutter 3. Katsuta 3
consists of a rotary blade 3a and a fixed blade 3b, and a one-turn clutch mechanism (not shown) causes the rotary blade 3a to rotate once for each cutting command to cut the recording paper.

The paper feed roller 4 is rotated by a recording paper feed command, and when the leading edge of the paper reaches the bottom of the bar 2, it is stopped by a signal issued from a device (not shown) that detects this arrival. , and is rotatable in the feeding direction. Note that the paper leading edge arrival detection signal is
At the same time, a command is given to a bar opening/closing control mechanism (not shown) to close the bar 2, and at the same time, a rotation command is given to the cam 13. 15 is a pinch roller, 16 is a bar for clamping the rear end of the recording paper, and 17 is a squeezing roller.

The operation of the above configuration will be explained using FIGS. 2 to 4. In FIG. 2, the leading edge of the recording paper 5 traveling along the feeding path 6 is moved to the bar 2 by the feeding command.
When the paper is inserted under the paper, the paper feed roller 4 stops, and
The bar 2 closes and clamps the tip, and the cam 13 begins to rotate. When the stop lever 9 is rotated clockwise about the lever shaft 10 by the projection 13a of the cam 13, the drum stop cam 8 is unlocked. Subsequently, the sensor 14 is turned on, so rotation is input to the drum shaft 7, and the drum 1 and drum stop cam 8 rotate as one. Cam 13
rotates through angle α1 and stops. Therefore, the tip end 9a of the stop lever 9 is brought into sliding contact with the drum stop cam 8 as shown in FIG. As the drum 1 rotates, the recording paper 5 is wrapped around the drum circumferential surface by the squeezing roller 17 in close contact with the drum. When the drum 1 further rotates by an angle β from the start of rotation as shown in FIG.
The drum stop cam 8 is stopped at the notch 8b. Sensor 14 turns OFF during the locking process
Therefore, the rotational input is cut off and the drum 1 is locked. Since the OFF signal from the sensor 14 at this time simultaneously commands the cutter 3 to cut, the rotary blade 3a rotates once and cuts the recording paper 5.

FIG. 4 shows the moment when the recording paper is cut. At this time, the recording paper 5 is wound around the drum 1 by a length S'. Therefore, the length S'' of the feed path is shortened by the length S' compared to S shown in FIG.

Thereafter, the cam 13 rotates by an angle α2 in response to a rotation command from a cutting end detection device (not shown), and the stop lever 9 is displaced to displace the drum stop cam 8.
is released, the sensor 14 turns ON, the drum 1 rotates again, and the recording paper 5 interposed between S'' is wound.Then, the rear end of the recording paper 5 is placed under the bar 16. When this point is reached, a control mechanism (not shown) closes the bar 16 to clamp the rear end of the paper, and at the same time the squeezing roller 17 is separated from the drum 1.

Note that in the above embodiment, the feeding of the recording paper is stopped when cutting the recording paper, but if the cutting speed of the cutter is sufficiently faster than the feeding speed of the recording paper, there is no need to stop the feeding. do not have.

As is clear from the above embodiments, the present invention has a configuration in which the recording paper is partially wound around the drum and then cut, thereby greatly shortening the length of the recording paper feeding path. This is very effective in downsizing the device because it does not increase the height of the device.

[Brief explanation of the drawing]

Fig. 1 is an explanatory diagram of a conventional paper winding device, Fig. 2 is a main part configuration diagram of an embodiment of the present invention, Figs.
The figure is an explanatory diagram of the operation of this embodiment. 1...Drum, 2...Bar, 3...Katsuta, 4
... Paper feed roller, 5 ... Recording paper, 6 ... Feeding path, 8 ... Drum stop cam, 9 ... Stop lever, 13 ... Cam, 14 ... Sensor.

Claims (1)

[Claims] 1. A rotating drum having clamping means for clamping the leading and trailing ends of the wound recording paper, a drum stop cam that is interlocked with the rotation of the rotating drum in the same phase, and a drum stop cam located upstream of the rotating drum in the recording paper conveyance direction. stopping means for locking the drum stop cam when the rotating drum has wrapped the recording paper by a distance S' at an intermediate position until the recording paper is wound once when the clamping means clamps the leading end of the recording paper; A paper winding device characterized in that it comprises a detection means for detecting stoppage of the drum at the intermediate position in conjunction with the detection means, and a cutting means for cutting the recording paper based on the output of the detection means.