JPS6012198B2 - Recording medium feeding mechanism - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a recording paper feeding mechanism that feeds a continuous roll of paper, records on it, and then cuts it, such as in a facsimile machine. This allows driving to be performed with one driving source.

FIG. 1 is a side view showing a secondary recording paper feeding mechanism in a facsimile machine.

Reference numeral 1 denotes a roll of paper, and continuous recording paper 2 unwound from the roll paper is transferred between a recording roller and a recording head 4, and facsimile information is recorded thereon by a thermal method or the like.

As the recording roller 3 rotates in the direction of the arrow a, the recording paper 2 is continuously fed, facsimile information is recorded thereon, and then the recording paper 2 is ejected via the cutter section 5. The cutter part 5 is
It consists of a fixed blade 6 and a movable cutter blade 7, and by rotating the movable cutter blade 7 in the direction of arrow a2, the recorded recording paper is cut off. However, after being separated in this way, when the next information is received and recording is resumed, recording starts from the position between the recording roller 3 and the recording head 4, so the length L between the recording restart section and the cutter section 5 is In this area, no recording is performed on the recording paper, and the paper is wasted.

In order to eliminate such waste, the recording roller 3 is rotated in the opposite direction after the paper is cut to return the leading edge of the recording paper to the vicinity of the recording roller 3, and then recording is restarted.
On the other hand, even if an attempt was made to reduce the number of drive source motors and drive the recording roller 3 and movable cutter blade 7 with one motor due to the need to reduce the cost of the apparatus, in the above-mentioned apparatus in which the leading edge of the recording paper is returned, Since it is necessary to rotate the recording roller in forward and reverse directions, and the paper feeding direction of the recording loaf 3 and the rotating direction of the movable cutter blade 7 are opposite, it is difficult to drive these with a single motor. Ta.

In a half-duplex facsimile machine that does not receive and send at the same time, the document feed motor during sending can also be used to drive the movable cutter blade, but in a full-duplex facsimile machine that receives and sends simultaneously, this is not possible. Cannot be used for both purposes.
It is an object of the present invention to solve these problems and to enable a single motor to rotate the recording roller in the forward and reverse directions and drive the movable cutter blade in a device that returns the leading edge of recording paper.

In order to achieve this object, the present invention provides continuous media that passes through a recording roller section, is transferred to an edge media cutting section (described below) where recording has been performed, and is cut by the rotation of a movable cutter blade. In a recording medium feeding mechanism configured such that the leading edge of the recording medium is returned to the vicinity of the recording loaf by the recording roller, the recording roller and the movable cutter blade for cutting the recording medium are connected to one common drive source, and An intermittent clutch is provided that connects and disconnects the connection between the roller and the drive source. By interposing a one-way clutch that connects the shafts of the printer and does not connect them in the opposite direction, the forward and reverse rotation of the recording roller and the rotation of the movable cutter blade when cutting paper are performed by a single drive source. Next, an embodiment of the recording medium feeding mechanism according to the present invention will be explained based on the drawings. FIG. Similarly,
2 is a recording paper, 3 is a recording roller, and 7 is a movable cutter blade. The recording head 4 above the recording roller 3 is omitted. M is a driving motor, which is connected to pulleys 9 and 10 via a belt 8. The pulley 9 is equipped with an electromagnetic clutch 11, and the pulley 9 and the recording roller 3 are connected via the electromagnetic clutch 11. Therefore, with the electromagnetic clutch 11 engaged, when the motor M rotates in the direction of arrow a, the recording roller 3 also rotates in the same direction, and when the motor M reverses, the recording roller 3 also rotates in the reverse direction. When the electromagnetic clutch 11 is disengaged, the connection between the pulley 9 and the recording roller 3 is broken, so even if the motor rotates, the recording roller 3 does not rotate. Has a built-in one-way clutch.

This one-way clutch connects the pulley 0 and the cutter shaft 12 when the pulley 0 rotates in the direction of arrow a2, but becomes free when the pulley rotates in the opposite direction (direction of arrow a3). Therefore, when the motor M rotates forward (in the direction of arrow a) and the recording roller 3 rotates in the paper feeding direction, the movable cutter blade 7 does not rotate and the motor rotates in reverse (in the direction of arrow a).
Only when this happens, the movable cutter blade 7 rotates in the direction of arrow a2. A rotating cam 13 is attached to the cutter blade 12.
The detection lever of the limit switch turtle 5 is fitted with iron into the arcuate recess 14 on its outer periphery, and the notch 16 is also engaged with a hook-shaped stopper. The cutter shaft 2 and the rotary cam electric 3 are prevented from rotating when the rotary cam turtle 3 rotates in the direction of the arrow a3, but does not act as a stopper against the rotation in the opposite direction of the arrow a2. I~E is a side view showing the positional relationship between the rotary cam 3, the IJ mitt switch turtle 5, and the stopper turtle 7, as well as the rotational direction of the recording roller 3, the movable cutter blade, and the positional relationship of the recording paper 2. ``A'' indicates the recording operation on the paper 2 and the fast-forwarding operation, ``TRO'' indicates the state when the paper is automatically cut, and ``C'' indicates the state when the leading edge of the paper is returned.

FIG. 4 is a time chart showing the operating states of the motor M, the electromagnetic clutch lever, and the movable cutter blade 7 during each of these operations. First, when facsimile information is received and recorded on the paper 2, the electromagnetic clutch 11 is engaged and the motor M rotates in the normal direction, thereby the recording roller 3 also rotates in the normal direction and the paper is fed in synchronization with the recording operation. . At this time, the one-way clutch in the cutter side pulley 10 becomes free, so the movable cutter blade 7 does not rotate. Also in this state,
Since the stopper 17 engages with the notch 16 and prevents the rotating cam 13 from rotating, the rotating cam 13 and the movable cutter blade 7 will not rotate due to the frictional force of the one-way clutch. At this time, the movable cutter blade 7 is facing the fixed blade 6 and is ready to cut, as shown in FIG. When the reception of one page is completed, the motor rotates at high speed and the paper 2 is rapidly forwarded, and the electromagnetic clutch 11 is turned OFF.
F, separating the recording roller 3 and pulley 9, and the motor M reverses and rotates in the direction of the arrow.

Therefore, the recording roller 3 is stopped, and the one-way clutch is engaged, so that the movable cutter blade 7 rotates in the direction of arrow a2, and the paper 2 is cut between it and the fixed blade 6 as shown in the figure. Also, for this rotation in the direction of arrow a, the stopper 17
does not act, the rotary cam 13 also rotates. When the cutting operation is completed, the electromagnetic clutch 11 is engaged while the motor M is rotating in the reverse direction, the recording roller 3 is also rotated in the reverse direction, and the paper 2 is returned. Then, the rotary cam 13 rotates once, and the detection lever of the limit switch 15 enters the recess 14 of the cam as shown in Figure A. However, at this point, the leading edge of the paper 2 has returned to the vicinity of the recording roller 3, and the limit switch 15 When the rotation of the motor M is stopped by a signal from 15, the leading edge of the paper stops at the return position and the movable cutter blade 7 stops at the next cutting preparation position as shown in FIG. As a result of the above, the reception record →
One cycle of cutting the paper and returning the leading edge of the paper is completed, and then reception recording is restarted from the leading edge of the paper by receiving reception information.

In the illustrated example, the rotary cam 13 and the I
Although the J-mitt switch 15 detects the stop position of the recording roller and movable cutter blade, it is also possible to use other detection means or use a step motor as a motor to determine the stop position from the number of drive pulses. As described above, according to the present invention, after the continuous paper passes through the recording roller section and recording is performed, it is transferred to the paper cutting section and cut by the rotation of the movable cutter blade, and after cutting the paper, unrecorded paper is removed. In a recording paper feeding mechanism configured such that the leading edge of continuous paper is returned to the vicinity of the recording roller by a recording loaf, the recording roller and a movable cutter blade for cutting the paper are connected to one common drive source, and the recording paper is An intermittent clutch is provided to connect and disconnect between the roller and the drive source, and between the movable cutter blade and the drive source, there is a connection between the drive source and the axis of the movable cutter blade for rotation of the movable cutter blade in the paper cutting direction. The structure is such that a one-way clutch is interposed between the two and not connected in the opposite direction.

Therefore, the record at the time of reception. - A single roller drive motor can rotate the recording roller forward and backward to feed the recording paper and return the leading edge of the paper, as well as drive the movable cutter blade, and is a full-duplex type that can receive and transmit at the same time. Even in a facsimile machine, a drive source such as a motor can be used to drive the recording roller and the movable cutter blade, making it possible to reduce costs and reduce the size and weight of the device.

[Brief explanation of the drawing]

FIG. 1 is a side view showing a recording paper feeding mechanism of a normal facsimile machine, FIG. 2 and the following are diagrams showing an embodiment of the recording paper feeding mechanism according to the present invention, FIG. FIG. 4 is a side view sequentially showing the operation of the device, and FIG. 4 is a time chart. In the figure, 2 is a recording paper, 3 is a recording roller, 4 is a recording head, 7 is a movable cutter blade, M is a motor, 11 is an electromagnetic clutch, 13 is a rotating cam, and 15 is a limit switch. Figure 1 Figure 2 Figure 3 Figure 4

Claims (1)

[Claims] 1 After the continuous recording medium passes through the recording roller section and recording is performed, it is transferred to the recording medium cutting section and is cut by the rotation of the movable cutter blade, and after cutting, the leading edge of the unrecorded recording medium is cut by the recording roller. In a recording medium feeding mechanism configured to be returned to the vicinity of the recording roller, the recording roller and a movable cutter blade for cutting the recording medium are connected to one common drive source, and a An intermittent clutch is provided between the movable cutter blade and the drive source to connect the axis of the drive source and the movable cutter blade when the movable cutter blade rotates in the cutting direction, and to connect the drive source and the axis of the movable cutter blade when the movable cutter blade rotates in the cutting direction. A recording medium characterized in that, by interposing a one-way clutch that is not connected to the recording medium, a single drive source is used to rotate the recording roller in forward and reverse directions and rotate the movable cutter blade during cutting. feeding mechanism.