JP2519443Y2 - Ink ribbon cartridge with ink supply structure - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial field of application] The present invention relates to an ink ribbon cartridge with an ink replenishing structure used in a recording device such as a typewriter or a computer printer.

[Conventional technology]

As such an ink ribbon cartridge with an ink supply structure, an endless ink ribbon impregnated with a liquid ink, a ribbon driving unit that circulates the ink ribbon between a printing unit and a ribbon storage unit, and a circular movement by the ribbon driving unit. It is known that an ink replenishing structure is replenished in a case for replenishing liquid ink to the ink ribbon to be moved while it is circulating.

In such an ink ribbon cartridge with an ink replenishment structure, an endless ink ribbon impregnated with a liquid ink in the printing section is made to follow a recording paper, and an impact dot head is used to give an impact suitable for printing from the ribbon side. To print. After that, liquid ink is replenished to the ribbon used for printing by using the ink replenishing structure, and the ribbon is reused for the printing.

[Problems to be solved by the device]

In such a conventional ink ribbon cartridge with an ink replenishment structure, an excessive amount of liquid ink is replenished to the ink ribbon in a state where the ink ribbon is not cyclically moved, and the amount of liquid ink impregnated into the ink ribbon is increased. There is a problem in that the amount becomes excessive, and this causes printing stains.

Further, when the conventional ink ribbon cartridge with an ink replenishing structure is cyclically moved for printing, the endless ink ribbon is locally impacted according to the shape of printing in the printing unit, The liquid ink impregnated in the ribbon is selectively consumed depending on the shape of the print. Thus, when the liquid ink is selectively consumed and continues for a long time, when the liquid ink is uniformly replenished to the ink ribbon using the ink replenishment structure, the liquid ink impregnated in the ink ribbon is obtained. Variation in quantity occurs. Therefore, if liquid ink is replenished by the ink replenishing structure under conditions that allow printing even in a portion where the amount of liquid ink impregnated in the ink ribbon is small, the liquid ink is replenished in the ink ribbon. There was a problem in that there was a portion where the impregnated amount was excessive, and this caused printing stains.

The present invention has been made in view of such circumstances, and an object thereof is to provide an ink ribbon cartridge with an ink supply structure that can solve the above-mentioned problems.

[Means for solving the problem]

An ink ribbon cartridge with an ink replenishing structure according to the present invention comprises an endless ink ribbon impregnated with a liquid ink, a ribbon driving unit that circulates the ink ribbon between a printing unit and a ribbon storage unit, and the ribbon driving unit. An ink ribbon cartridge with an ink replenishment structure, wherein an ink replenishment structure for replenishing liquid ink to the ink ribbon being circulated while being circulated is housed in a case, wherein the printing unit in the circulation path of the ink ribbon. Between the location corresponding to the ink ribbon and the location where the ink is replenished by the ink replenishing structure, allowing transfer of the liquid ink impregnated in the ink ribbon and contact resistance with the ink ribbon. Is driven by the ink ribbon when the size becomes a certain value or more corresponding to the amount of the liquid ink. Provided with a contact roll rolling, the said contact roll, has a feature a removing means for removing a liquid ink that has been transferred to it to the point that is annexed.

[Action]

When the ink ribbon cartridge with the ink supply structure of the present invention having such a structure is used, when the amount of the liquid ink impregnated in the ink ribbon increases and the liquid ink floats on the surface of the ink ribbon, the contact Since the ink ribbon adheres to the roll and the contact resistance becomes a certain value or more, the contact roll rotates following the ink ribbon, and the excess of the impregnated ink ribbon is caused by the rotation. Liquid ink is transferred to the contact roll. Further, since the contact roll is provided with the removing unit, the liquid ink transferred to the contact roll by using the removing unit is removed.

[Effect of device]

Therefore, by operating the contact roll and the removing means as described above, the contact roll is driven to rotate only when the portion where the amount of the liquid ink impregnated in the ink ribbon is in contact with the contact roll. Then, the liquid ink is transferred to this, and it becomes possible to remove the excess liquid ink from the ink ribbon. as a result,
The excess liquid ink impregnated in the ink ribbon can be selectively removed to prevent the occurrence of the print stain, and the above-mentioned conventional problems can be solved.

〔Example〕

 Hereinafter, embodiments of the present invention will be described with reference to the drawings.

In FIG. 1, (C) shows a cartridge case that houses an endless ink ribbon (R) impregnated with liquid ink, and the case (C) is divided into two in the ribbon width direction.

One of the two divided parts is composed of a synthetic resin main body case (1) integrally formed with a pair of left and right ribbon guide arms (1A), (1B), and the other is divided into the main body case (1). 1) is composed of a lid (2) made of synthetic resin for detachably closing the opening, and between the pair of ribbon guide arms (1A) and (1B), these both (1A) and (1B). ), A concave printing portion (A) is formed for printing an ink ribbon (R) over an impact dot head (not shown).

The main body case (1) is formed with a ribbon storage part (3) that is long in the left and right, and the ink ribbon (R) is stored in the ribbon storage part (A) and the ribbon storage part (3) at the entrance side of the ribbon storage part (3). A ribbon drive unit (4) is provided for cyclic movement across the unit (3).

The ribbon drive unit (4) includes a pair of field rolls (4A) that apply a traveling drive force to the ink ribbon (R),
The ink ribbon (R) is composed of (4B) and is driven and rotated by both field rolls (4A) and (4B).
Is folded and stored in the ribbon storage part (3).

In addition, the printing section (A) of the ribbon storage section (3)
An ink replenishment structure (B) for replenishing the liquid ink to the ink ribbon (R) that is in the course of traveling is provided on the side opposite to the side where the ink is present.

The ink replenishing structure (B) is an occlusion body (5) made of a non-woven fabric, a fiber, a sponge or the like that occludes liquid ink.
And an ink supply member (6) such as felt for supplying the liquid ink to the ink ribbon (R) from the ink storage body (5) through the one feed roll (4A) that also serves as an ink transfer member. Both members (5) and (6) are housed in a rectangular housing space separated from other spaces by a partition wall (7) formed integrally with the case body (1). .

Now, in the middle of the portion corresponding to the printing portion (A) in the circulation path of the ink ribbon (R) and the ink replenishing portion by the ink replenishing structure (B), more specifically, in the printing portion (A). A liquid in contact with the ink ribbon (R) and impregnated in the ink ribbon (R) is provided in an extra space in the case (1) between a corresponding position and an outlet of the ribbon storage part (3). A contact roll that allows the transfer of ink and rotates following the ink ribbon (R) when the contact resistance with the ink ribbon (R) becomes a certain value or more corresponding to the amount of the liquid ink. (8) is provided. Specifically, the contact roll (8) has a smooth surface on which no irregularities such as knurls are formed so that it does not rotate when the amount of the liquid ink is small, while the amount of the liquid ink is small. When the contact resistance becomes larger than a certain value due to the increase in the amount of ink, the ink ribbon is rotated following the ink ribbon.

Further, a urethane roll (9) as a removing means (D) for removing the liquid ink transferred to the contact roll (8) is attached to the contact roll (8) in a state of being driven to rotate in contact with the contact roll (8). There is. The urethane roll (9) is made of urethane having a property of absorbing and holding the liquid ink, and by the absorption and holding, the liquid ink is removed from the contact roll (8) when the contact roll (8) is rotated. Has become.

When the ink ribbon cartridge with the ink supply structure of the present invention having such a structure is used, the ink ribbon (R)
When the amount of liquid ink impregnated in the ink ribbon increases and the liquid ink floats on the surface of the ink ribbon (R), the ink ribbon (R) is applied to the contact roll (8).
Will stick and the contact resistance will be above a certain level.
The contact roll (8) is rotated by being driven by the ink ribbon (R), and the liquid ink impregnated in the ink ribbon (R) is transferred to the contact roll (8) with the rotation. Become so. Further, since the contact roll (8) is provided with a urethane roll (9) as the removing means (D) so as to be freely rotatable following the contact roll (8), the urethane as the removing means (D). The liquid ink transferred to the contact roll (8) by using the roll (9) is absorbed and removed, and is held by the contact roll (8).

[Another embodiment]

As shown in FIG. 2, the removing means (D) may be a scraper (10) attached to the contact roll (8) in such a manner that a cutting edge at a specific portion of its peripheral surface is in contact with the contact roll (8). This is because the scraper (10) can remove the liquid ink on the peripheral surface of the rotating contact roll (8) so as to scrape it off. In addition, (11) in the figure
The tray is a tray for receiving the ink scraped off by the scraper (10), and the ink is stored in the tray (11).

Further, instead of the urethane roll (9) as the removing means (D), a roll made of a material having a property of absorbing and holding the liquid ink and having a shape-retaining property can also be adopted.

In the claims of the utility model, reference numerals are given for convenience of drawing and objects, but the present invention is not limited to the structure of the accompanying drawings by the entry.

[Brief description of drawings]

FIG. 1 is a partially cutaway plan view showing an embodiment of an ink ribbon cartridge with an ink supply structure according to the present invention, and FIG. 2 is a partially cutaway plan view showing the essential part of another embodiment. (3) ... Ribbon storage, (8) ... Contact roll,
(A) ... print section, (B) ... ink supply structure, (C)
…… Case with lid, (D) …… Remover, (R) …… Ink ribbon.

Claims (1)

(57) [Scope of utility model registration request] 1. An endless ink ribbon (R) impregnated with a liquid ink, and a ribbon drive section (4) for moving the ink ribbon (R) cyclically between a printing section (A) and a ribbon storage section (3). And an ink replenishing structure (B) for replenishing the ink ribbon (R), which is circulated and moved by the ribbon drive section (4), with liquid ink during the circulatory movement, which is housed in a case (C). An ink ribbon cartridge with a structure, wherein the ink ribbon is provided in the middle of a position corresponding to the printing unit (A) in a circulation path of the ink ribbon (R) and a position where ink is supplied by the ink supply structure (B). (R) is contacted to allow transfer of the liquid ink impregnated in the ink ribbon (R), and the contact resistance with the ink ribbon (R) is constant corresponding to the amount of the liquid ink. A contact roll (8) is provided which rotates following the ink ribbon (R) when the size is increased, and the contact roll (8) removes the liquid ink transferred to the contact roll (8). An ink ribbon cartridge with an ink replenishment structure attached.