JPS62271772A - Recorder - Google Patents

Abstract

PURPOSE:To remove the slack in a recording paper, by providing a link member for moderating a pressing force of a second feeding roller when a first roller is out of contact with the recording paper, in conjunction with a roller- supporting means. CONSTITUTION:When a recording paper 7 is fitted in position and a driving roller 25 and a payout roller 26 are rotated, a roll 8 of the recording paper is rotated in the direction of an arrow C, and when the recording paper 7 reaches a feeding roller 21, all rollers stop rotating. A cam 19 is rotated, and a push rod 16 is moved in the direction of an arrow H to push a pin 20. A pinch roller 10 having been strongly pressed against a capstan roller 9 by springs 13 and 15 is now pressed by only the spring 13 with a weaker force. A cam 32 is also rotated, a roller support plate driving member 29 is turned in the direction of an arrow G, and the roll 8 is brought into contact with a bottom part of a recording paper support base 24. Since the movement of the paper 7 is accompanied by a high resistance and the pinch roller 10 is relatively weakly pressed against the capstan roller 9, the paper 7 is moved while being pulled by the capstan roller 9 and the pinch roller 10, whereby the slack in the paper 7 is removed.

Description

[Detailed Description of the Invention] 3. Detailed Description of the Invention Industrial Application Field The present invention involves feeding a roll of recording paper to a heat-sensitive recording head, and recording images such as characters and figures by the heat-sensitive recording head. The present invention relates to a thermal recording device.

BACKGROUND OF THE INVENTION In recent years, recording devices employing thermal recording methods and thermal transfer recording methods have been actively developed because of their low noise and maintenance-free advantages.

A conventional recording device will be explained below.

FIG. 3 is a sectional view of a main part of a conventional recording device, in which 41 is a thermal head in which a large number of heating resistive elements are arranged in a row;
42 is a cylindrical platen whose outer periphery is covered with rubber and absorbs the undulations of the thermal head 41; 47 is a highly smooth recording paper held wound on a roll; 48 is a shaft 4;
This is a recording paper roll in which recording paper 47 is wound around 8a. An ink sheet 43 is pressed by the thermal head 41 and pressed against the platen 42 while stacked on the recording paper 47, and the ink sheet 43 is a plastic film several microns thick with ink applied thereto. 44 is a supply reel for supplying the ink sheet 43;
Reference numeral 45 denotes a take-up reel for winding up the ink sheet 43 used for recording, 63 a discharge roller for discharging the recording paper 43 after recording by the thermal head 41, and 75 a chassis having a lid 75a attached so as to be openable and closable. , 4
Reference numeral 6 denotes a removable ink sheet cassette which includes a supply reel 44 and a take-up reel 45, and is designed so that the supply reel 44 and take-up reel 45 can be replaced when the ink sheet 43 is used up. 49 is a metal capstan roller with relatively high hardness; 50
A pinch roller 151 having rubber on the outer periphery and a surface with relatively low hardness supports the pinch roller 50 and is a support member rotatable around a shaft 52; 53 is a support member 51;
relatively weak spring coefficient (200-300 g
W/mm>, the support member 51 receives a counterclockwise force due to the spring 53, and the pinch roller 50 is pressed against the capstan roller 49. 54 is a strong pressure member that is rotatably attached around the shaft 52 and is pulled by a spring 55 having a relatively strong spring coefficient (1000=1500gW/mm).The strong pressure member 54 rotates the support member 51 counterclockwise. I'm forcing it. Reference numeral 56 is a cam driven by a motor (not shown), which rotates the strong pressure member 54 against the spring force of the spring 55, and releases the force when the spring 55 is pressed. A conveyance roller conveys the recording paper 47 that has passed through it, and 62 is a cutter that cuts the recording paper 47. 0,7
1, 72, and 73 are guide rollers. Reference numeral 64 denotes a recording paper holding member that supports the recording paper roll 48, and the recording paper holding member 64 includes a groove 641 in which the shaft 48a slides, and an arm 64f1 and an arm that are rotatably supported around the shaft 64g1 and the shaft 64g. Spring 64h1 that pulls 64f
It has a recording paper pressing roller 64b1 attached to the arm 64f, an opening 64d1 for feeding out the recording paper 47, and an opening 64e. The recording paper 47 is attached by first attaching the shaft 48a of the recording paper roll 48 to the groove 64i, and then pressing the recording paper 47 with the recording paper pressing roller 64b. 65 is located in the opening 64e and comes into pressure contact with the recording paper roll 48, so that the recording paper 4
7 is a driving roller that feeds the recording paper press roller 6, and 66 is a recording paper pressing roller 6.
4b and between the recording paper roller 64b and the recording paper roller 64b.
This is a feeding roller that pinches the recording paper 7 and feeds the recording paper 47.

Note that the recording paper 47 is transferred from the feeding roller 66 to the capstan roller 49, the platen 42, and the conveying roller 61.
A path to the outside of the chassis 75 via the discharge roller 63 is secured by paper guides (not shown in the figure) that sandwich the recording paper 47 from both sides.

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

First, after attaching the recording paper 47, when the drive roller 65 and the feeding roller 66 are rotated in the direction in which the recording paper 47 is ejected (hereinafter referred to as the forward feeding direction), the recording paper roll 48 rotates in the direction shown by arrow C. However, the recording paper 47 is guided between the capstan roller 49 and the pinch roller 50 by a paper guide. At this time, the capstan roller 49, platen 42, and conveyance roller 61 are already rotating in the forward feeding direction, and the recording paper 47 passes through the platen 42 and reaches the conveyance roller 61. When the recording paper 47 reaches the transport roller 61, all the rollers stop rotating. At this point, the cam 56 rotates, and the strong pressure member 54 no longer presses the support member 51. In other words, the pinch roller 50 has hitherto been pressed against the capstan roller 49 with a strong force by the springs 53 and 55, but now it is pressed only by the relatively weak spring 53 due to the rotation of the cam 56.

Furthermore, at this time, the pressure of the thermal head 41 is released. Next, with the drive roller 65 stopped, the feed roller 66, the capstan roller 49, the platen 42, and the discharge roller 61 are rotated in the forward direction, and the recording paper 47 is conveyed to the cutter 62 and the discharge roller 63. At this time, since the recording paper drive roller 65 is stopped, the rotational resistance of the recording paper roll 48 is large, and the pinch roller 50 is relatively weak (because it is in pressure contact with the capstan roller 49, the recording paper 47 is While being pulled by the stun roller 49 and the pinch roller 50, the recording paper 47 is slightly moved in the axial direction of the capstan roller 49 and the pinch roller 50 to remove the slack.By this axial movement, the recording paper 47 is pulled out straight. As a result, skewed printing can be prevented.

When the length of the recording paper 47 passing through the platen 42 reaches the length for recording, the feeding roller 66
Cabstan roller 49. Platen 42. Conveyance roller 61. The discharge roller 63 stops and the thermal head 4
1 is pressed against the platen 42 via the ink sheet 43 and the recording paper 47, and at the same time, the cam 56 rotates, the strong pressure member 54 rotates, the spring 55 pushes the support member 51, and the pinch roller -50 is again spring 53 and spring 5
5, it will be pressed more strongly against the capstan roller 49.

Next, all the rollers are rotated in the direction in which the recording paper 47 is wound up (hereinafter referred to as the reverse feeding direction), and the recording paper 47 is moved in the direction shown by arrow E, and a recording signal is sent to the thermal head 41. As a result, the heating resistor element generates heat, ink on the ink sheet 43 is selectively transferred to the recording paper 47, and an image is recorded on the recording paper 47. Next, recording paper 47
When the rear end of the roller reaches the thermal head 41, all the rollers stop rotating.

Next, the pressure contact of the thermal head 41 is released, all the rollers rotate in the forward feeding direction, the end of the portion of the recording paper 47 where the image is recorded is moved to the cutter 62, the recording paper 47 is cut by the cutter 62, and the discharge roller Chassis 75 by 63
discharge outside.

Problems to be Solved by the Invention However, in the past, in the process of removing the slack in the recording paper 47,
The recording paper drive roller 65 stops, but in order to stop only one roller in the conveyance path of the recording paper 47 in this way, it is necessary to drive only the recording paper drive roller 65 with a separate drive source. However, at this time, the recording paper drive roller 65 receives a large force from the recording paper 47, so in order to stop it, it is necessary to supply a holding current or a current in the opposite direction to the motor, which consumes a large amount of power. The problem was that it was necessary. There was also a system that stopped the recording paper drive roller by installing a clutch means such as a river without using a separate drive source, but in such a configuration, the friction value was used and the discontinuation from the drive value was not used. 'a that can be done
1) If the latch is not used, the next time the recording paper 47 is conveyed, the clutch will not connect and slack will again occur between the recording paper drive roller 65 and the feeding roller 66, causing skewed printing. It had some problems.

Means for Solving the Problems The present invention provides a first feed roller and an interior of a recording paper holding member that holds the recording paper movably between a position where the recording paper contacts the bottom and a position where the recording paper is floating from the bottom. The first position is between the position where it enters and pushes up the recording paper and the position where it does not touch the recording paper.
a roller holding means for reciprocating the roller; a second feeding roller for moving the recording paper to the recording section; It is equipped with a link member that relieves the pressing force of the feed roller.

Effect With the above configuration, when the first roller leaves the recording paper, the recording paper comes into contact with the bottom of the recording paper holding member, and the conveyance resistance of the recording paper increases due to its own weight. In this state, the slack in the recording paper is removed.

Embodiment FIG. 1 is a sectional view of a recording apparatus in an embodiment of the present invention, in which 1 is a thermal head, 2 is a platen, 3 is an ink sheet, 4 is a supply reel, 5 is a take-up reel, and 6 is an ink sheet. cassette, 7 recording paper, 8 recording paper roll, 9 capstan roller, 10 pinch roller 111
is a support member, 12 is a shaft, and 13 is a relatively weak spring coefficient (2
00 to 300 gW/mm), 14 is a strong pressure member, and 15 is a relatively strong spring coefficient (1000 to 1500 gW/mm);
21 is a conveyance roller, 22 is a cutter, 23 is a discharge roller, and 24 is a recording paper holding member, which have the same structure as the conventional example. 32 is a cam, 29 is rotatably attached around a shaft 30, is pressed in the direction shown by arrow A by a spring (not shown), and is in contact with the cam 32; a roller support plate drive lever; 27 is rotatably attached around a shaft 28 and has a pin 31 that engages with the roller support plate drive lever 29; - the roller support plate drive lever 2;
9 is an interlocking roller support plate, 25 is a roller support plate 2
7, and as the roller support plate 27 rotates,
A recording paper drive roller 26 that presses against the recording paper 7 and pushes up the recording paper roll 8 presses against the paper pressing roller 24b,
This is a feeding roller that feeds out the recording paper 7. 19 is a cam that rotates together with the cam 32; 16 is a bin 17 and 18;
The cam 19 is slidably supported by the cam 19 and is pushed in the direction shown by the arrow 1 by a spring (not shown in the figure).
This is a bushing rod that presses against the bushing rod 16.
is configured to push the bottle 20 provided on the strong pressure member 14 as the cam 19 rotates.

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

First, after attaching the recording paper 7, when the driving roller 25 and the feeding roller 26 are rotated in the forward feeding direction, the recording paper roll 8 rotates in the direction shown by arrow C, and the recording paper 7 is moved to the capstan roller 9 by the paper guide. It is guided between pinch rollers 10. At this time, the capstan roller 9, platen 2, and conveyance roller 21 are already rotating in the forward feeding direction, and the recording paper 7 passes through the platen 2 and reaches the conveyance roller 21.

When the recording paper 7 reaches the transport roller 21, all the rollers stop rotating. Here, as shown in FIG. 2, the cam 19 rotates and the bushing rod 16 moves in the direction shown by arrow H to push the bottle 20, so that the strong pressure member 14
Until now, the pinch roller 10 was pressed against the capstan roller 9 with a strong force by the springs 13 and 15, but due to the rotation of the cam 19, it is pressed only by the relatively weak spring 13. At this time, the cam 32 also rotates.Accompanying this, the roller support plate drive member 29 rotates in the direction shown by arrow G, and at the same time, the roller support plate 27 also rotates, causing the drive roller 25 and the feeding roller to rotate. 26 is lowered, and the recording paper roll 8 comes into contact with the bottom of the recording paper holding table 24.Furthermore, at this time, the suppression of the thermal head 41 is also released.

Next, in this state, the drive roller 25, the feed roller 26, the capstan roller 9, the platen 2, and the discharge roller 21 are rotated in the forward feeding direction, and the recording paper 7 is conveyed to the cutter 22 and the discharge roller 23. At this time, the recording paper roll 8 is in contact with the bottom of the recording paper holding member 24, so there is a large resistance to the movement of the recording paper 7, and the pinch roller 10 is relatively weak (it is in pressure contact with the capstan roller 9). Therefore, the recording paper 7 is moved by the capstan roller 9.
While being pulled by the pinch roller 10, the capstan roller 9 and the pinch roller 10 are moved toward each other in the axial direction, and the slack is removed.

This movement in the axial direction causes the recording paper 7 to be pulled out straight, thereby preventing skewed printing.

When the length of the recording paper 7 passing through the platen 2 reaches the length for recording, the recording paper driving roller 25. Feeding roller 26. Capstan roller9. Pinch roller 10, platen 2. Conveyance roller 21. The discharge roller 23 (hereinafter referred to as "all rollers") stops, the thermal head 1 is pressed against the platen 21 via the ink sheet 3 and the recording paper 7, and at the same time the cam 19 rotates, and the bushing rod 16 moves in the direction of arrow I. The pinch roller 10 moves in the direction shown by , the strong pressure member 14 rotates, the spring 15 pulls the support member 11, and the pinch roller 10 is again strongly pressed against the capstan roller 9 by the spring 13 and the spring 15. .

At the same time, the cam 32 also rotates together with the cam 19, the roller support plate drive lever 29 rotates, the roller support plate 27 simultaneously rotates, the recording paper drive roller 25 and the feeding roller 26 rise, and the first The state returns to the state shown in the figure.

Next, by rotating all the rollers in the reverse direction and moving the recording paper 7 in the direction shown by arrow E, a recording signal is sent to the thermal head 1, so that the heating resistor element generates heat and the ink on the ink sheet 3 is used for recording. The image is selectively transferred onto the paper 7 and an image is recorded on the recording paper 7. Next, when the rear end of the recording paper 7 reaches the thermal head 1, all the rollers stop rotating.

Next, the pressure of the thermal head 1 is released, all the rollers rotate in the forward feeding direction, the end of the portion of the recording paper 7 where the image is recorded is moved to the cutter 22, and the recording paper 7 is moved to the cutter 22.
The paper is cut by the roller 23 and discharged by the discharge roller 23.

In this embodiment, the recording paper holding member 24 is fixed to the apparatus, but in the present invention, the recording paper driving roller 25 and the feeding roller 26 that are in pressure contact with the recording paper roller are separated from the bottom of the recording paper holding member 24. Therefore, when using a removable paper removal cassette that holds the recording paper 7 inside, the recording paper cassette can be attached to the device by sliding it in the axial direction of the recording paper roll 8, which further improves operability. You can get good recording equipment.

Effects of the Invention The present invention provides a first feed roller and a recording paper holding member that holds the recording paper movably between a position where the recording paper contacts the bottom and a position where the recording paper is floating from the bottom. The first position is between the push-up position and the position where it does not touch the recording paper.
a roller holding means for reciprocating the roller; a second feeding roller for moving the recording paper to the recording section; When the first roller leaves the recording paper, the recording paper comes into contact with the bottom of the recording paper holding member, and the transport resistance of the recording paper increases due to its own weight. There is no need to stop the recording paper driving roller as in the past, and there is no increase in power consumption, and even when the recording paper driving roller is brought into pressure contact again, the recording paper driving roller is provided with a clutch means etc. Therefore, the recording paper does not become slack.

[Brief explanation of the drawing]

FIG. 1 is a sectional view of a recording device in an embodiment of the present invention;
FIG. 2 is a sectional view showing the state during the same operation, and FIG. 3 is a sectional view of a conventional :a recording device. 7... Recording paper, 8... Recording paper roll, 1
0...Pinch roller-111...Supporting member, 13.
... Spring, 14... Strong pressure member, 15...
Spring, 16...butsch rod, 19.
...Nonomu, 24...Record paper holding stand, 25
...recording paper drive roller, 32...cam

Claims (1)

[Claims] The first feed roller enters the opening of the recording paper holding member that holds the recording paper in a movable manner between the position where the internal recording paper contacts the bottom and the position where the recording paper is lifted from the bottom. roller holding means for reciprocating the first roller between a position where the recording paper is pushed up from the bottom of the recording paper holding member and a position where it does not contact the recording paper; and a roller that is pressed against the recording paper by a spring to record the recording paper. a second feed roller that is moved to the second feed roller; and a link member that is interlocked with the roller holding means and relieves the pressure contact force of the second feed roller when the first roller is not in contact with the recording paper. A recording device comprising: