JPS61268475A - Printer equipment - Google Patents

Abstract

PURPOSE:To make it possible to stabilize the running of an ink ribbon and thereby to improve the quality of print by a construction wherein the ink ribbon fed to a printing head is sent into a housing of an ink ribbon cassette by an ink ribbon feeding mechanism provided on a carrier. CONSTITUTION:A printing head 12 provided on a carrier 6 is moved back in the direction E when a gear 27 is rotated in the direction K by a motor 28, while a pinch roller 22 of an ink ribbon feeding mechanism is brought down in the direction I simultaneously and separated apart from a feeder roller 21. When the gear 27 is rotated in the direction J, on the other hand, the printing head 12 approaches a platen, while the pinch roller 22 is put in pressure-contact with the feeder roller 21 by a spring 31. When the feeder roller 21 is rotated in the direction N by the rotation of a motor 33, an ink ribbon 11a held with pressure between the feeder roller 21 and the pinch roller 22 is sent in the direction O and into a holding element of an ink ribbon cassette. Thus, the running of the ink ribbon is stabilized and the quality of printing is improved by a simple structure.

Description

[Detailed Description of the Invention] [Summary] The structure of the printing section is such that the ink ribbon supplied from the ink ribbon cassette to the print head is sent into the storage section of the ink ribbon cassette by an ink ribbon feeding mechanism provided in a carrier. .

[Industrial application field]

This invention relates to an ink ribbon cassette used in a thermal transfer printer gML, and relates to a structure of an ink ribbon cassette that prevents the ink ribbon from running skewed and stabilizes winding.

In recent years, input/output terminals for data processing equipment,
Various serial thermal transfer printer devices are used as printers in printers and the like.

An ink ribbon is used for printing in this printer device, and stable feeding of the ink ribbon is required in order to perform high quality printing.

[Conventional technology]

FIG. 4 is a plan view showing an overview of a printing section of a thermal transfer printer, FIG. 5 is a plan view showing an overview of an ink printer, and FIG. 6 is a side view of a sliding friction clutch.

As shown in FIG. 4, the printer device has side frames 1. A platen 2 is rotatably supported on the sight frame 1.1.

A sheet of paper 3 is wound around the platen 2 as shown by the two-dot chain line, and as the motor 4 rotates, the sheet of paper 3 is moved through the gear 5a.
The rotation of the platen 2 via the gear 5b causes it to be sent in the direction indicated by the arrow in the figure.

On the other hand, on the front side of the platen 2, in the lower part of the figure, a carrier 6 is slidably engaged with a guide shaft 7 provided parallel to the platen 2, and a gear rear 6 is similarly provided parallel to the platen 2. It is locked to the held heald 8.

The heald 8 is stretched around pulleys 9 and 9'' and is connected to the motor 10 via the pulley 9. Therefore, the heald 8 moves the carrier 6 in the direction of arrow H-C in the figure by the forward and reverse rotation of the motor 10.
It can be moved back and forth in the direction.

An ink ribbon cassette 11 is mounted on the carrier 6, and an ink ribbon cassette 11 is mounted on the carrier 6.
It is built in with ea or its part exposed on the platen side.

Further, in the carrier 6, there are printed characters 71 and 12 surrounded by an ink ribbon cassette II, which are composed of heat generating elements that form printing by dots. At times, it protrudes in the direction of the arrow and presses the ink phone 11a against the paper 3.

Then, at the same time as printing is completed, apply a varnish stroke (J) in the direction of arrow E.
11) in preparation for inserting the next sheet.

As shown in FIG. 5, the ink ribbon cassette 1 has a supply section 13 wound with the ink ribbon Ila on its right side rotatably accommodated in a storage section 14, and the ink ribbon Ila can be taken in and out of the storage section 14. Phone guides 15a and 15b are provided, and the ink ribbon Ila is stretched between the ribbon guides.

Further, on the left side of the storage section 14, a winding section 16 for winding up the ink ribbon 11a is rotatably provided.

The winding section 16 can be connected to an external drive source, and the ink ribbon is drawn from the supply section 13 via the ribbon guides 15a and 15b with a constant winding torque via a sliding PJ friction clutch provided on the carrier. 11a is wound up.

As shown in FIG. 6, the friction clutch includes a shaft portion 40 that engages with the winding portion 16, and a shaft portion 40 coaxial with the shaft portion 40 as shown in the figure.
It consists of a rotatable driven gear 42 which is pressed by a coil spring 41 on the lower part of the shaft, and a felt 44 which is pressed between the driven gear 42 and the shaft end 43.

In such a configuration, when the drive gear 45 rotates and rotates the engaged driven gear 42, the shaft portion 40 rotates due to the frictional force between the driven gear 42 and the shaft end portion 43 via the felt 44. , wind up the ink ribbon 11a.

When the winding diameter of the ink ribbon 11a increases and the winding force becomes greater than the frictional force, slippage occurs at the felt 144, and the winding of the ink ribbon 11a becomes constant. .

Also, in order to apply hack tension to the ink ribbon 11a as shown in FIG.
A contact portion] 7 is provided at the bottom of the contact portion 17, and a leaf spring 20 is provided with a friction member such as a felt 18 at the tip and biased in the direction of arrow F about the fulcrum 19. ribbon 1
It is designed to pinch 1a.

When the ink ribbon cassette 11 having such a configuration is mounted on the gear rear 6 as shown in FIG. 3, the winding section 16 is connected to a drive source, so that it is linked to the printing operation of the printer.
The ζ winding section 16 rotates and winds up the ink ribbon 11a that is fed out as the print head 12 moves in the direction of arrow C.

Also, the printing button F'12 moves in the direction of arrow C, and
Heat is applied and printing is performed on the paper 3 of the printer 2 shown in FIG. 2 while moving through the ink ribbon 11a.

[Problem that the invention seeks to solve]

As explained above, the structure of the sliding friction clutch for winding the ink ribbon is not only complicated and expensive, but also difficult to set the winding torque, which causes variations.

Furthermore, during printing as described in (h), since the winding torque of the ink ribbon 11a by the sliding friction clutch is constant, the winding tension pt changes depending on the change in the winding diameter as shown in FIG.
changes (generally decreases to 72 to 174 at the beginning of the volume at the end of the volume).

This change tends to cause the ink phone to become loose or skewed, resulting in problems such as uneven printing.

[Means for solving problems]

FIG. 1 is a 't' to tm diagram showing the principle of the present invention.

As shown in the figure, in the present invention, an ink ribbon 11a consisting of a feed roller 21 and a pinch roller 22 is mounted on a carrier 6.
A feeding mechanism is provided to feed the ink ribbon 11a fed out as the print head 12 moves from the supply section 13 of the ink printer cassette 23 into the storage section 24 of the ink printer cassette 23.

[Effect]

Since the ink ribbon is fed into the ink ribbon cassette by a feed roller and a pinch roller, the mechanism is in a cylinder, and the winding torque and the winding pattern are constant.

〔Example〕

An embodiment of the present invention will be described below with reference to FIGS. 2 and 3.

FIG. 2 is a plan view of the printing section of the printer according to the present invention, and FIG.
Figure +a+ is a perspective view of part G in Figure 2, figure th+ is a plan view illustrating the relationship between the gear, node 1, and second pin, and figure C1 is a side view of the fixing part of the pinch roller.

In the figure, 21 is a feed roller, 22 is a pinch roller,
22a is a shaft, 23 is an ink cartridge, 24 is a storage section, 25 is a shaft, 26.30 is a pin, 27.28a
is gear, 27a is groove, 28.33 is motor, 29.31
is a coil spring. Identical parts are designated by the same reference numerals throughout the figures.

As shown in FIG. 2, the printer device according to the present invention has a carrier 6 that faces the platen 2, carries a print head 12 and an ink cartridge cassette 23, and moves parallel to the platen 2, and a feed roller 21. A feeding mechanism for the ink ribbon 11a consisting of a pinch roller 22 is provided, and the ink ribbon 11a fed out as the print head 12 moves from the supply section 13 of the ink ribbon cassette 23 is fed into the storage section 24 of the ink ribbon cassette 23. This is what I did.

That is, the tip 11a' of the ink ribbon 11a is located in the storage section 24.
The ink ribbon 11a, which is attached to the wall as shown in the figure and is fed by a feed roller 21 and a pinch roller 22, is
They are stored randomly in the storage section 24.

Further, in the ink ribbon feeding mechanism composed of a feeding roller 21 and a pinch roller 22, the pinch roller 22 moves in the direction of the arrow H-■ in preparation for attachment and detachment of the ink ribbon cassette 23, and the print head 12 and Interlockingly, when the dot 12 is retracted for printing, the pinch roller 22 is retracted to the position indicated by the two-dot chain line.

This interlocking mechanism will be explained with reference to FIG.

As shown in the figure, the print head 12 has a 7-shaped shape, and a thermal head is provided on one outer surface so as to come into contact with the ink ribbon 11a.

The print head I2 is supported by the carrier 6+ by a shaft 25 so as to be swingable as shown by the arrow []-E.

A pin 26 is press-fitted into the rear end side of the printing heel t'12, and is slidably engaged with a groove 27a of a gear 27 as shown in the figure (bl).

The gear 27 meshes with the gear 28a of the motor 2B, and depending on the forward and reverse rotation of the motor 2, the gear 27 rotates forward and reverse as shown by the arrow 1-. It's supposed to make one turn.

That is, the rear end of the print head 12 is always pulled as shown by the arrow I7 by the coil spring 29, and therefore the print head 12 is urged in the direction of the arrow with the shaft 25 as a fulcrum and is in the approach state. .

The position of the pin 26 in the gear groove 27a in this state is shown in the figure fhl.

The groove 27a is formed so that one end is close to the outer periphery and the other end is close to the rotation center.Next, when the gear 27 rotates in the direction of the arrow, the pin 26 is guided by the groove 27a of the gear 27.
moves downward as 26'.

As the pin 26 moves, the rear end of the print head 12 also lowers, and the print head 12 moves in the direction of arrow 1 around the shaft 25.
It rotates (retreats) like an arrow.

In conjunction with the approach and escape operations of the print head 12, the pinch roller 22 presses against and retreats from the feed roller 21 as shown by arrow H-1.

That is, as shown in FIG.
The pin 30 abuts orthogonally against the foot 22a of the pinch roller 22, as shown in FIG.

The pinch roller 22 is always moved in the direction of the arrow M by the coil spring 31.
When the gear 27 rotates in the direction of the arrow, it presses the pinch roller 22 in the direction of the arrow 1 against the bias of the spring.

As shown in FIG.
The structure is such that it collapses in the direction of the arrow when pressed by.

As described above, the pinch roller 22 comes into pressure contact with the feed roller 21 as the print head 12 approaches, and when the feed roller 21 rotates in the direction of arrow N due to the rotation of the motor 33, the pinch roller 22 is pressed between the feed roller 21 and the pinch roller 22. An action is taken to send the ink phone Ila in the direction of arrow O.

Then, when the printing button 1"12 is retracted, the pinch roller 2
2 are designed to fall down and evacuate together as shown by arrow 1.

〔Effect of the invention〕

- As explained above, by using the printer device of the present invention, the running of the ink ribbon is stabilized, the printing quality is improved, and the structure is simplified, which is effective in reducing the cost of the device. play.

[Brief explanation of drawings]

FIG. 1 is a plan view showing the principle of the present invention. Fig. 2 is a plan view of the printing section of the printer according to the present invention, Fig. 3 +a) is a perspective view of section G in Fig. 2, and Fig. 3 1hl explains the relationship between the gear and the first and second pins. A plan view, FIG. 3 1hl is a side view of the fixing part of the pinch roller, FIG. 4 is a plan view showing an outline of the printing part of the thermal transfer printer device, and FIG. 5 is a plan view showing an outline of the ink cartridge. FIG. 6 is a side view of the sliding friction clutch. In the figure, 2 is a platen, 6 is a carrier - 1123 is an ink ribbon feeder, 11a is an ink ribbon, 12 is a printing gutter, 13 is a supply section, 14.24 is a storage section, 21 is a feed roller, 22 is a pinch rollers, 22a, 40 are shafts;
25 is the shaft, 26.30 is the pin,
27.28a is a gear, 27a is a groove, 2
8.33 is a motor, 29.31.41 is a coil spring, 42 is a driven gear, 43 is a shaft end, 44 is a felt, and 45 is a driving gear. Painting 1 Mission

Claims (1)

[Claims] A platen (2) and a print head (1) provided opposite to the platen (2).
2); a carrier (6) on which the print head (12) is mounted and moves parallel to the platen (2);
In the printing section, which consists of an ink ribbon cassette (23) that supplies the ink ribbon (11a) to the front of the carrier (6), a feed roller (21) and a pinch roller (
22), the ink ribbon (11a) fed out as the print head (12) moves from the supply section (13) of the ink ribbon cassette (23) to the ink ribbon cassette. (23) A printer device characterized in that the printer is fed into a storage section (24).