JPH0353759A - Recorder - Google Patents

Abstract

PURPOSE:To attain quick discharge of recording paper by providing a 1st drive transmission mechanism driving forward and reverse a platen roller with forward reverse drive of a motor, a 2nd drive transmission mechanism driving forward a discharge roller with the forward drive of motor and a 3rd drive transmission mechanism driving the discharge roller forward with the reverse drive of motor. CONSTITUTION:A pulse motor 9 is driven forward at recording, its torque is delivered to a platen roller 2 and a discharge roller 5 through a 1st drive transmission mechanism 10 and a 2nd drive transmission mechanism 11, recording paper 1 is carried in a forward direction shown in the arrow A by the platen roller 2 and the discharge roller 5 and a recording means 3 applies the recording. Then a cutter 4 is activated to cut off the recording paper 1. Thus, the pulse motor 9 is driven reverse and to retract the recording paper not in use to a prescribed position for the preparation of the succeeding recording. In this case, the reverse torque of the pulse motor 9 is delivered to the paper discharge roller 5 via a 3rd drive transmission mechanism 13, the discharge roller 5 is driven forward and the cut-off recorded recording paper 1a is discharged onto a discharge tray.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of the Invention The present invention relates to recording apparatuses such as facsimiles and printers that use rolled recording paper.

2. Description of the Related Art As shown in FIG. 3, a conventional apparatus of this type includes a roll of recording paper 1, a platen roller 2 for conveying the recording paper 1, and a recording means such as a heat-sensitive hand for recording on the recording paper 1. 3 and
A cutter 4 that cuts the recorded recording paper, a discharge roller 5 and a binch roller 6 that discharge the recording paper, and a paper jam detection device that confirms that the recording paper has been reliably cut and that there is no paper jam. It is equipped with a sensor 7, a drive device 8 for driving the platen roller 2 and the discharge roller 5, and the like. a first drive transmission mechanism 10 consisting of a gear train for transmission to the platen roller 2;
A second drive transmission mechanism 11 that includes a one-way clutch 12 and transmits the rotation to the discharge roller 5 to rotate the discharge roller 5 in the forward direction only when the pulse motor 9 rotates in the forward direction.
have.

In this apparatus, during recording, the pulse motor 9 rotates in the forward direction, which causes the platen roller 2 and discharge roller 5 to rotate in the forward direction, thereby conveying the recording paper 1 in the forward direction indicated by arrow A. Even after the predetermined recording on the recording paper is completed, the pulse motor 9 continues to rotate in the forward direction, and the recording paper 1 is conveyed through the housing where the end of the recorded portion reaches the position of the cutter 4 (see Fig. 4(a)). )reference). Next, the cutter 4 operates to cut the recording paper 1. Thereafter, the pulse motor 9 rotates in the opposite direction, rotates the platen roller 2 in the opposite direction, and pulls back the unused recording paper 1 (see FIG. 4(b)). At this time, since the discharge roller 5 is stopped, the recorded recording paper 1a that has been separated is the shingle 1 that is stopped. This results in
A gap is formed between the leading edge of the unused recording paper 1 and the trailing edge of the recorded recording paper 1a.

Next, the pulse motor 9 rotates in the forward direction again to feed the recording sheets 1 and 1a in the forward direction. At this time, since there is a gap 1 between the leading edge of the recording paper 1 and the trailing edge of the recording paper 1a, the paper jam detection sensor 7 detects the trailing edge of the recording paper 1a, and the recording paper 1a is securely Detect disconnection.

Furthermore, after detecting the trailing edge of the recording paper 1a, the trailing edge is located at the ejection port-2.
5, the pulse motor 9 continues to rotate, and the recording paper 1a is discharged onto a discharge tray (not shown) (see FIG. 4(C)). After that, the pulse motor 9
rotates in the opposite direction, and the leading edge of the unused recording paper 1 is pulled back by the recording unit (see FIG. 4(d)). This completes one recording operation.

Problems to be Solved by the Invention However, according to such a configuration, after finishing recording and cutting, and before ejecting the recorded paper onto the output tray, the pulse motor is rotated in reverse to remove the unused paper. There is a problem in that it takes time to pull back the unused recording paper, then rotate the pulse motor in the forward direction to eject the recording paper, and then rotate the pulse motor in the reverse direction again to pull back the unused recording paper.

To avoid this problem, after cutting the recording paper,
When the housing pulse motor is rotated in the forward direction and the recording paper is ejected, there is no gap between the trailing edge of the recorded recording paper and the leading edge of the unused recording paper, and the paper jam detection sensor detects the recording paper. The trailing edge cannot be detected and the end of recording paper ejection cannot be detected. Therefore, the conveyance speed by the ejection roller is increased as well as the conveyance speed by the platen roller, so that when the recording paper is ejected, a gap is created between the trailing edge of the cut recorded recording paper and the leading edge of the unused recording paper. It is conceivable to configure it as follows. However, with this configuration, tension is applied to the recording paper when the recording paper before cutting is conveyed simultaneously by the platen roller and the ejection roller, so it is necessary to increase the capacity of the drive motor, and the ejection roller Also, a slip knob is generated between the pinch roller and the recording paper, which causes problems such as streaks on the recording paper.

One possibility is to use a different motor from the platen roller drive motor as the drive source for the discharge roller, but using a different motor would complicate the structure and require a control device, which would be costly. will rise significantly.

The present invention has been made in view of the above-mentioned problems, and an object of the present invention is to provide a recording device that can quickly eject recorded recording paper without complicating the structure. .

Means for Solving the Problems In order to solve the above-mentioned problems, the present invention has a reversible rotary motor connected to drive the platen roller in the forward and reverse directions. is connected via a second drive transmission mechanism that rotates the discharge roller in the forward direction, and further via a third drive transmission mechanism that rotates the discharge port roller in the forward direction when the motor rotates in the opposite direction. It has a structure of connecting.

According to the above-described structure, the ejection roller rotates in the forward direction, that is, in the direction in which the recording paper is ejected, regardless of whether the platen roller rotates in the forward or reverse direction. Therefore, during recording, the motor rotates in the forward direction, which causes both the platen roller and the ejection roller to rotate in the forward direction to transport the recording paper in the forward direction. After cutting the paper, the motor rotates in the reverse direction, which causes the platen roller to rotate in the reverse direction and pull back the leading edge of the unused recording paper, and at the same time, the ejection roller rotates in the forward direction to eject the separated recording paper. This makes it possible to quickly eject the recording paper.

Embodiment FIG. 1 is a perspective view showing a schematic configuration of a recording apparatus according to an embodiment of the present invention, and the same or similar members as in the conventional example of FIG. 3 are denoted by the same reference numerals. In other words, 1 is a roll of recording paper, 2 is a platen roller that conveys the recording paper 1, 3 is a recording means such as a heat-sensitive hemlock that records on the recording paper 1, 4 is a cutter that cuts the recorded recording paper, and 5 is a cutter that cuts the recorded recording paper. A discharge roller for discharging the recording paper, 6 a pinch roller, 7 a paper jam detection sensor for confirming that the recording paper has been reliably cut and that there is no paper jam, 8 a platen roller 2 and a discharge roller 5 This is a drive device for driving.

This drive device 8 includes a single pulse motor 9 that can rotate in forward and reverse directions, a first drive transmission mechanism 10 consisting of a gear train that transmits the rotation of the pulse motor 9 to the platen roller 2, and a one-way crank 12. a second drive transmission mechanism 11 that transmits the rotation to the discharge roller 5 to rotate the discharge roller 5 in the forward direction only when the pulse motor 9 rotates in the forward direction;
A third drive transmission mechanism l3 that includes a one-way clutch l4 and transmits the rotation to the discharge roller 5 to rotate the discharge roller 5 in the forward direction only when the pulse motor 9 rotates in the opposite direction.
It is equipped with Here, the first drive transmission mechanism 1O and the second drive transmission mechanism 12 have gear ratios such that when the pulse motor 9 rotates forward, the platen row 22 and the discharge roller 5 convey the recording paper at the same speed. It is determined. Further, the third drive transmission mechanism 13 is configured such that when the pulse motor 9 rotates in the reverse direction, the recording paper ejection speed by the ejection roller 5 is higher than the speed at which the platen roller 2 pulls back the recording paper, so that the unused recording paper after cutting is The gear ratio is determined so that when the leading edge is pulled back to a predetermined position, the torn recording paper can be reliably discharged from the discharge roller 5.

The operation of the recording apparatus configured as described above will be described below.

During recording, the pulse motor 9 rotates forward, and the rotation is transmitted to the platen roller 2 and the ejection roller 5 via the first drive transmission mechanism 10 and the second drive transmission mechanism 11, and the recording paper 1 is transferred to the platen roller 2 and the ejection port. The paper is conveyed by the roller 5 in the forward direction shown by the arrow A, and printing is performed using the 1,000-stage recording stage 3. At this time, the platen roller 2 and the discharge roller 5 transport the recording paper 1 at the same speed, so no unnecessary tension is applied to the recording paper 1, and troubles such as streaks on the recording paper do not occur. .

Even after the predetermined recording on the recording paper is completed, the ζrus motor 9 continues to rotate in the forward direction and conveys the recording paper 1 until the end of the recorded portion reaches the position of the cutter 4 (see Fig. 2). a)). Next, the cutter 4 operates to cut the recording paper 1. After that, the S-rush motor 9 rotates in the opposite direction, rotates the platen roller 2 in the opposite direction, and pulls the unused recording paper 1 back to a predetermined position in preparation for the next recording (see Fig. 2 (b)). . At this time, the reverse rotation of the pulse motor 9 is transmitted to the ejection roller 5 via the third drive transmission mechanism 13, and the ejection roller 5 rotates in the forward direction. When the leading edge of the unused recording paper that has been ejected upward (not shown) has been pulled back to a predetermined position, the ejection of the recording paper 1a is completed. Thus, after cutting the recording paper, the recorded recording paper 1a can be ejected at the same time by simply pulling back the unused recording paper.

In the above embodiment, the gear ratio of the third drive transmission mechanism l3 is set so that the ejection speed of the ejection roller 5 is greater than the pullback speed of the platen row 22. It is not necessary to increase the pull-back speed of the roller 2. After cutting the recording paper, while the platen row 22 pulls back the recording paper by the reverse rotation of the pulse motor 9, the discharge roller 5 discharges and ejects the cut-off recording paper. Any speed is sufficient as long as it can reliably discharge the paper onto the tray.

Furthermore, in the embodiment described above, a gear train and a one-way clutch were used to transmit the rotation of the pulse motor 9, but this does not mean that other means such as a pulley, a belt, an electromagnetic clutch, etc. may also be used.

Effects of the Invention As is clear from the above description, the present invention provides a reversible rotary motor connected to drive the platen roller in the forward and reverse directions with respect to the ejection roller when the motor rotates in the forward direction. The roller rotates in the forward direction, and by connecting the discharge roller so that it rotates in the forward direction even when the motor rotates in the opposite direction, the motor rotates in the forward direction and the platen is rotated during recording. Both the roller and ejection roller are rotated in the forward direction to transport the recording paper in the forward direction. After recording is finished and the recording paper is cut, the motor rotates in the opposite direction and the platen roller is rotated in the reverse direction to remove the unused recording paper. By pulling back the leading edge and simultaneously rotating the ejection roller in the forward direction, the separated recording paper can be ejected, which has the effect that the recording paper can be ejected quickly.

[Brief explanation of drawings]

FIG. 1 is a perspective view showing a schematic configuration of a recording apparatus according to an embodiment of the present invention, FIGS. 2(a) and 2(b) are schematic side views illustrating the movement of recording paper in the recording apparatus, and FIG. The figure is a perspective view showing the schematic structure of a conventional recording apparatus, and FIG. 4(a).
(b). (c) and (d) are schematic side views illustrating the movement of recording paper in the recording apparatus. DESCRIPTION OF SYMBOLS 1... Recording paper, 1a... Recorded recording paper, 2... Platen roller, 3... Recording means, 4... Cutter
5... Discharge roller, 6... Binch roller, 7... Paper jam detection sensor, 8... Drive device, 9... Pulse motor, 10... First drive transmission mechanism, 11... Second drive transmission mechanism, 12... One-way clutch, 13... Third drive transmission mechanism, 14... One-way clutch.

Claims (1)

[Claims] A platen roller that conveys the recording paper, a recording means that records on the recording paper, a cutter that cuts the recorded recording paper, and an ejection roller that discharges the cut recording paper.
a drive device for driving the platen roller and the ejection roller; the drive device includes a single reversible rotation motor; a first drive transmission mechanism that rotates the platen roller in forward and reverse directions by forward and reverse rotation of the motor; A second drive transmission mechanism that rotates the discharge roller in the forward direction when the motor rotates in the forward direction; and a third drive transmission mechanism that rotates the discharge roller in the forward direction when the motor rotates in the opposite direction. Characteristic recording device.