JP2567538Y2 - Ink ribbon cassette - Google Patents

Description

[Detailed description of the invention]

[0001]

The present invention relates to an ink ribbon after printing.
Refill the ink and repeat the ink ribbon for a long time
The present invention relates to an ink ribbon cassette configured to be usable .

[0002]

2. Description of the Related Art A conventional ink ribbon cassette of this kind is used.
Is located on the upstream side of the ribbon
An ink supply body composed of a roller-shaped ink impregnated body;
2 for winding the middle of the ink ribbon in a Z-shape
One guide wheel, and one guide wheel
A swinging guide pivotally attached to the feeder so as to be movable in the near and far directions.
The guide member and one of the guide wheels run from the ink supply
In order to return to the non-contact position separated to the upper side in the line direction,
A spring that urges the oscillating guide member to oscillate with elastic force
And act on it as the ink ribbon travels.
When the applied tension increases, the swing guide
Swings against the elastic force of
Contact the ink ribbon that has been
When the ink ribbon travel is stopped,
The swing of the swing guide member by the elastic force of the sprint grayed
The ink ribbon wrapped around one of the guide wheels.
Non-contact away from the ink supply to the upstream side in the ribbon running direction
The contact position (for example,
No. 60-14591).

[0003]

The present invention is to provide a the conventional Inkuribo
In the ink cassette, the change in the tension of the ink ribbon is used.
The swing guide member at the non-contact position is returned to the spring elasticity.
It can swing to the contact position against the return force
When the ink ribbon travel stops, the ink ribbon
The ink ribbon is not in contact with the ink supply
Excessive ink supply to the ink ribbon when the line stops
There is an advantage that can be suppressed. However,
When the ribbon is stopped, wrap the ink ribbon around it.
Guide wheels in the ribbon running direction with respect to the ink supply
To move the hand away from the hand,
The ink ribbon located on the lower side in the traveling direction than the
It is easy to be pulled back, and as a result, printing used after passing the printing section
Immediately after the ink ribbon runs in the opposite direction,
Immediately after opening, there is a problem that printing defects such as shading and chipping occur.
You. The present invention has been made in view of the above circumstances,
The replenishing roll that comes into contact with the ink ribbon is used as the rotation drive source
With the rational modification used, the ink ribbon cassette
Simplified when the ink ribbon travel stopped.
Immediately after resuming printing, while suppressing excessive supply of ink
An object of the present invention is to provide an ink ribbon cassette capable of suppressing the occurrence of printing defects in the above.

[0004]

In order to achieve the above object, a feature of the present invention is to provide a replenishing roller which comes into contact with an ink ribbon.
The ink supply that supplies ink to the ink ribbon and the ink ribbon
In conjunction with the rotation of the supply roll during travel, the
Non-contact position where the feeder is separated from the supply roll
From the contact point against the elastic return force
And a rolling press body, and rotate from the supply roll.
The rotation transmission system to the pressing body is
Ink supply body in the contact position, and the supply roll
Based on the return to the non-contact position of the ink supply member rotation stop when stopping the
The present invention has the following advantages.

[0005]

[Function] The supply roll rotates as the ink ribbon runs.
Then, the non-contact position
The ink supply is located at the contact position against the elastic return force.
Pressed, and at this time, rotationally pressed from the supply roll
Due to the slip of the slip mechanism provided in the rotational transmission system to the body.
The contact position of the ink supply body regardless of the rotation of the supply roll.
Is maintained. Also, as the running of the ink ribbon stops,
When the replenishment roll stops rotating, the rotation pressing body
Pressure on the ink supply is released and the slip mechanism
The ink supply at the contact position is elastically restored due to the slip.
The return position returns to the non-contact position with the return force.
Due to the ink supply being kept in contact with the
Oversupply can be avoided. Moreover, the supplement
Rotary pressing body and slip mechanism linked to the rotation of the supply roll
Is only provided, for example, the printing device starts printing.
Drive unit that forcibly switches the ink supply based on a signal
Compared to the case where the ink ribbon cassette is
Only simple improvements.

[0006]

[Effect of the Invention] Therefore, the rotational force of the supply roll is limited to
It is used as a drive source for changing the position of the
It possible to simply incorporate a slip mechanism into the rotary transmission system of a vehicle?
Simplifies the structure of the ink ribbon cassette,
If the ink on the ink ribbon is
While suppressing excess replenishment, the ink
Immediately after using the print that has passed through the print section when the ribbon is stopped
This ink ribbon does not travel in the opposite direction,
Improper printing immediately after resuming printing due to reverse running of ink ribbon
Can be suppressed .

[0007]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Embodiments of the present invention will be described below with reference to the drawings. FIG. 3 shows a case 2a and a case 2 made of synthetic resin, which open upward and are made of a synthetic resin, in which a liquid ink is absorbed and stored in a nonwoven fabric, a fiber or a sponge.
Ink ribbon cartridge which is housed in a cassette case 2 which is combined with a synthetic resin lid case 2b which closes the upper opening of a, and in which the liquid ink stored in the ink storage body 1 is supplied to the running endless ink ribbon R. Indicates a set. In the box-shaped case 2a, a pair of left and right ribbon guide arms 2c, a ribbon storage chamber 3 for storing the ink ribbon R, and an ink storage chamber 4 for storing the ink storage body 1 are integrated. A lid case 2b formed to close these upper openings is screwed, and an ink dot head (not shown) between the pair of ribbon guide arms 2c travels over the two ribbon guide arms 2c. ) To form a printing section A for printing. At the entrance side of the ribbon storage chamber 3, an ink ribbon R
There is provided a ribbon driving unit 5 for causing the printer to travel around the printing unit A and the ribbon storage unit 3. The ribbon driving unit 5 is provided with a feed roll 5a driven and rotated by receiving power from the printer side and a supply roll 5b for ink supply which is driven and rotated by the feed roll 5a. The feed roll 5a, the supply roll 5b, Ink ribbon R between
The ink ribbon R is pulled out of the ribbon storage chamber 3 by the drive rotation of the feed roll 5a and travels, and the ink ribbon R that has passed through the printing unit A is stored in the ribbon storage chamber 3 while being folded. It has become. An ink replenishing mechanism is provided between the ribbon driving unit 5 and the ink storage chamber 4 to supply the liquid ink stored in the ink storage 1 to the running ink ribbon R. The ink supply mechanism includes a supply roller 5b that supplies liquid ink to the ink ribbon R by contact with the ink ribbon R.
And an ink supply 6 for supplying the liquid ink stored in the ink storage 1 to the supply roll 5b by contact with the supply roll 5b.
Is constituted by a rod-shaped felt having a rectangular cross section held in contact with the ink storage body 1. Said ink supply member 6 is replenished roll 5b is held in a non-contact position to be non-contact position separated relative to, and an ink supply member 6 which is held in a non-contact position resiliently flexing deforming, the ink A posture changing mechanism B is provided for changing the posture of the supply body 6 to a contact posture at which the supply body 6 comes into contact with the supply roll 5b.
As shown in FIGS. 1 and 2, the attitude changing mechanism B changes the attitude of the ink supply body 6 to the contact attitude in conjunction with the rotation of the supply roll 5b, and rotates in gear with the supply roll 5b. The rotating shaft member 7, a rotating member 8 loosely fitted to the rotating shaft member 7, and a spring 9 for pressing a flange 8 a formed integrally with the rotating member 8 against a gear end surface 7 a of the rotating shaft member 7. It is provided and configured. This posture changing mechanism B
When the rotation shaft member 7 rotates with the rotation of the supply roll 5b, the rotation member 8 also rotates following the frictional engagement by the pressing force of the spring 9, and the pressing member connected to the flange 8a. 8b presses the ink supply body 6 toward the supply roll 5b, and the ink supply body 6 held in the non-contact position as shown by the two-dot chain line in FIG. The posture is changed to the contact posture that is pressed against. The pressing member 8b is configured such that the rotating shaft member 7 is
The ink supply body 6 continues to be pressed against its elastic restoring force by rotating while frictionally engaging while slipping with respect to a, and the rotation of the rotary shaft member 7 stops as the supply roll 5b stops rotating. Then, the ink supply body 6 of the pressing member 8b
Is released by the elastic return force, and the ink supply body 6 returns to the non-contact posture. That is, the pressing member 8
b, the rotation of the supply roll 5b
In conjunction with the ink supply body 6 with respect to the supply roll 5b.
The ink from the non-contact position that separates
A rotary pressing body that presses against the elastic return force of the supply body 6 is configured.
And a rotating member from the supply roll 5b.
Gear of the rotary shaft member 7 interposed in the rotary transmission system
End face 7a and the rotation frictionally engaged with the gear end face 7a
The flange 8a of the member 8 and the gear end face 7 of the rotary shaft member 7
a with the spring 9 pressed against the
The ink supply 6 is maintained at the contact position when the roller 5b rotates.
And an ink supply member when the rotation of the supply roll 5b is stopped.
6 to allow the return to the non-contact position
is there. Accordingly, when the replenishing roll 5b rotates with the travel of the ink ribbon R, the liquid ink that has permeated the ink reservoir 1 into the ink supply body 6 is applied to the replenishing roll 5b, and the liquid ink applied to the replenishing roll 5b is The ink ribbon R applied to the ink ribbon R and applied with the liquid ink is stored in the ribbon storage chamber 3.

[Another embodiment] a . The replenishing roll may be provided separately from the ribbon driving unit. B. The replenishing roll 5b shown in the embodiment is also used as a feed roll driven and rotated by receiving power from the printer, and the feed roll 5a shown in the embodiment is used as the replenishing roll 5.
The driven roll may be configured to be driven and rotated. C. The feed roll 5a and the supply roll 5b are not limited to those having teeth that can bite each other, and may be rolls having a cylindrical peripheral surface. D. In the embodiment, the configuration in which the posture of the ink supply body 6 is changed to the non-contact posture by elastically bending and deforming the ink supply body 6 and the posture is changed to the non-contact posture by the elastic return force of the ink supply body 6 has been described. A material is attached to the ink supply body 6 along the longitudinal direction thereof, and both the elastic material and the ink supply body 6 are elastically bent and deformed to change the posture to the contact posture. The posture may be configured to be changed to the non-contact posture by the elastic return force. In this case, the posture change of the ink supply body 6 from the contact posture to the non-contact posture can be reliably performed.

In the claims of the utility model registration, reference numerals are written for convenience of comparison with the drawings, but the present invention is not limited to the configuration of the attached drawings by the entry.

[Brief description of the drawings]

FIG. 1 is an enlarged sectional plan view of a main part.

FIG. 2 is a sectional view taken along line II-II of FIG.

FIG. 3 is a cross-sectional plan view showing the inside of the ink ribbon cassette.

[Explanation of symbols]

5b Supply roll 6 Ink supply body 8 rotation pressing body B Attitude change mechanism R Ink ribbon

Claims (1)

(57) [Scope of request for utility model registration] 1. An ink supply (6) for supplying ink to a replenishing roll (5b) in contact with an ink ribbon (R) ;
The replenishment roll (5) accompanying the travel of the ink ribbon (R)
In conjunction with the rotation of b), the ink supply body (6) is
Rotational pressing that presses against a resilient force from a non-contact position separated from the replenishing roll (5b) to a contact position that makes contact
And a supply roll (5b).
The replenishment row is connected to the rotation transmission system from
The ink supply (6) to the contact position when the
And when the supply roll (5b) stops rotating.
A slit allowing the ink supply (6) to return to the non-contact position.
An ink ribbon cassette provided with a cleaning mechanism .