JPS60242089A - Printer - Google Patents

Abstract

PURPOSE:To eliminate the need for pulling an ink ribbon over a guide shaft and the tip face of a print head by arranging an ink ribbon changeover lever provided at the tip of a ribbon guide so that it will approach or separate from the platen in linkage with the print head. CONSTITUTION:An ink ribbon changeover lever 6 is pivoted to turn in the direction perpendicular to the platen 5 so that the lever 6 will approach or separate from the platen 5 in linkage with the print head 1. In the replacing of an ink ribbon 2, the ink ribbon changeover lever is separated from the platen together with the print head and a ribbon guide 7 can be detached from the ink ribbon 2 as well.

Description

[Detailed Description of the Invention] [Object of the Invention] One Industrial Field of Application The present invention relates to a printer that prints on bankbooks, slips, etc. of financial institutions. The printer will be explained with reference to FIG.

In the figure, 1 is a print head, 2 is an ink ribbon, and this ink ribbon 2 is impregnated with two colors of ink in the width direction. 03a and 3b are guide shafts that guide the ink ribbon 2; 4a and 3b are guide shafts that guide the ink ribbon 2; 4b is a pair of ribbon rollers for tensioning the ink ribbon; o5 is a platen;
The tip of the print head 1 faces the platen 5 with a certain gap therebetween.

The ink ribbon 2 is pulled out from the rib/roller 4a,
When the guide 7 is set so as to be wound around the ribbon roller 4b via the shaft 3a, the end surface of the print head 1, and the guide shaft 3b, and is printed, bankbooks, slips, etc. (not shown) are fed onto the platen 5. When the print head 1
is driven, and printing is performed via the ink ribbon 2 by a printing wire or the like protruding from the tip of the print head 1.

Also, although not shown here, this printer has an ink ribbon switching mechanism, and under normal conditions, this ink ribbon switching mechanism receives a force such as a spring and transfers one widthwise side of the ink ribbon 20 to the print head. The ink ribbon 2 is biased so as to correspond to the tip surface of the print head 1, and only when switching is necessary, the ink ribbon 2 is moved in a predetermined direction using a power source such as a solenoid, thereby changing the position of the ink ribbon 2 relative to the tip of the print head 1. It is designed to switch colors.

-Problems to be Solved by the Invention- As described above, in the conventional printer, the color of the ink ribbon 2 can be automatically switched by the ink ribbon switching mechanism. However, when it comes to replacing the ink ribbon 2, , because the relationship between the print head 1 and the individual parts around it is fixed, and because these parts are intricately intertwined, the operator must set them by hand, and the In this case, the ink ribbon 2 is connected to the guide shaft 3a, the tip surface of the print head 1 and the guide shirt 3 as described above.
Since you have to use your hands to pass the ink one by one in the order of b, there are problems such as poor operability and getting your hands dirty with ink.

The present invention aims to solve these problems.

[Structure of the invention]

Means for Solving a Problem - In order to achieve the above-mentioned object, the present invention provides an ink ribbon switching lever having a ribbon guide at the tip that can engage with the ink ribbon, and the ribbon guide is connected to the top surface of the print head. The ink ribbon switching lever is disposed on the side and pivoted so that it can rotate in a direction perpendicular to the platen, and the ink ribbon switching lever moves toward and away from the platen in conjunction with the print head. It was designed to do so.

-Operation- According to the above-described means, when the print head is moved away from the platen when replacing the ink ribbon, the ink ribbon switching lever also moves away from the platen in conjunction with this, and the ribbon guide at the tip of the lever moves away from the ink ribbon. Therefore, after replacing the ink ribbon and tensioning a new ink ribbon between the ribbon rollers, when the ink ribbon switching lever approaches the platen together with the print head, the ribbon guide engages with the ink ribbon and the ink ribbon is moved to the specified position. can be set to the state of

One example- Examples will be described below with reference to the drawings.

FIG. 1 is a front view showing an embodiment of a printer according to the present invention, and FIG. 2 is a right side view thereof.

In the figure, 1 is a print head, 2 is an ink ribbon, and 3a
and 3b are guide shafts, 4a and 4b are ribbon rollers,
5 is a platen, which is the same as that shown in FIG.

Reference numeral 6 denotes an ink ribbon switching lever for changing the position of the ink ribbon 2 with respect to the front end surface of the print head 1 to switch colors, and a ribbon guide γ that can engage with the ink ribbon 2 is provided at the front end. This ink ribbon switching lever 6
is arranged so that the ribbon guide γ is located on both sides of the tip of the print head 1, and is pivoted so as to be rotatable in a direction perpendicular to the longitudinal direction of the platen 5, and d is the length of the rotation. The central axis is shown.

Reference numeral 9 denotes a guide post for positioning the ink ribbon switching lever 6, and is fixed to a frame or the like (not shown).

Generally, in a printer, the print head 1 can move from the position shown by a solid line to the position shown by a chain line, but in this embodiment, in conjunction with this print head 1, the ink ribbon switching lever 6 is moved as shown by a chain line. This will move you to the position shown.

The machine ink ribbon switching lever 6 moves toward and away from the platen 5 together with the print head 1.

Further, this ink ribbon switching lever 6 is constantly receiving a force to rotate in the direction of arrow A shown in FIG. It is designed to receive forces in the arrow and arrow directions.

Next, the operation of this embodiment will be explained.

Now, when the print head 1 and the ink ribbon switching lever 6 are in the position shown by the dashed line, and both the tabs are close to the platen 5, the tab provided at the tip of the ink ribbon switching lever 6 is The ribbon guide 7 is engaged with the ink ribbon 2, and the ink ribbon 2 is sent in a predetermined state from the ribbon roller 4a, through the guide shaft 3a, the front end surface of the print head 1, and the guide shaft 3b to the ribbon roller 4b. There is. At this time, the ink ribbon switching lever 6 is receiving a force in the direction of arrow A by a spring (not shown), but its rotation is restricted by a limiter (not shown), so it is fixed in the state shown by the dashed-dotted line in FIG. be done.

In this state, the ink ribbon 2 is positioned so that the part impregnated with one of the two colors of ink corresponds to the front end surface of the print head 1, and therefore the print head 1 is driven and the front end surface is If a printing wire or the like is made to protrude from the platen 5, printing will be performed on a bankbook, slip, etc. (not shown) on the platen 5 in one color.

When printing with ink of the other color, a power source such as a solenoid (not shown) is driven. The ink ribbon switching lever 6 receives a force from the power source in the direction of the arrow and rotates by a certain angle, and as the ink ribbon 2 rotates, the ink ribbon 2 moves together with the ribbon guide 7 to impregnate the ink of the other color. This portion is positioned so as to correspond to the front end surface of the print head 1. When the power source is stopped, the ink ribbon switching lever 6 returns to its original position by the force of the spring.

In this manner, the position of the ink ribbon 2 is changed by rotating the ink ribbon switching lever 6, and the color to be used can be changed.

Next, a case where the ink ribbon 2 is replaced will be described.

In this case, when the print head 1 is moved away from the platen 5, the ink ribbon switching lever 6 is also moved away from the platen 5, and the ribbon guide I is moved away from the ink ribbon 2. At this time, the end surface of the ink ribbon switching lever 6 and the guide post 9 come into contact with each other at the same time.
As shown in FIG. 2, the ribbon guide 7 is moved so that its center position is approximately at the center of the print head 1.

Through this series of operations, the print head 1 and the ink ribbon switching lever 6 are brought to the position shown by the solid line, and as a result, the print head 1 and the guide shaft 3a.

3b, the ink ribbon 2 can be easily removed in this state.

The new ink ribbon 2 is placed on the ribbon roller 4a.

4b, and push it in from position A to position B shown in FIG. 2 to fix it. In this state, the center of the entire width of the ink ribbon 2 coincides with the center of the ribbon guide 7, so when the ink ribbon switching lever 6 is brought close to the platen 5 together with the print head 1, the ribbon guide 7 can easily move the ink ribbon 2.
The print head 1 then moves the platen 5 to the printing position.
The ink ribbon 2 is set in the predetermined state described above when it approaches and stops at the position indicated by the dashed line, and the portion corresponding to the tip surface of the print head 1 is at C in FIG. position.

〔Effect of the invention〕

As explained above, in the present invention, an ink ribbon switching lever having a ribbon guide at its tip that can engage with an ink ribbon is arranged so that the ribbon guide is located on the side of the print head tip, and the ink ribbon switching lever is arranged so that the ribbon guide is located on the side of the print head tip. The ink ribbon is pivoted so that it can rotate in a direction perpendicular to the longitudinal direction, and this ink ribbon switching lever works in conjunction with the print head to approach the platen.
Therefore, when replacing the ink ribbon, the ink ribbon switching lever is moved away from the platen along with the print head, and a new ink ribbon is stretched between the ribbon rollers, and then the ink ribbon switching lever is moved together with the print head. By simply bringing the ink ribbon closer to the platen, the ribbon guide can be easily held onto the ink ribbon, and the ink ribbon can be reliably set in a predetermined state.

Therefore, there is no need to manually route the ink ribbon around the guide shaft and the tip of the print head as in the past, which improves operability and eliminates the possibility of getting your hands dirty with ink. 0

[Brief explanation of drawings]

FIG. 1 is a front view showing an embodiment of a printer according to the present invention, FIG. 2 is a side view thereof, and FIG. 3 is a front view showing a conventional printer. 1... Print head 2... Ink ribbon 3a, 3
b... Guide shaft 4a, 4b... Ribbon roller 5... Platen 6... Ink ribbon switching lever 7... Ribbon guide Patent applicant Oki Electric Industry Co., Ltd. Agent Patent attorney Takashi Kanakura Nitoku Open [1aGO-242089 (4) 10 2C1il

Claims (1)

[Claims] 1. A print head installed to approach and move away from a platen, an ink ribbon impregnated with multiple colors of ink in one width direction, and a pair of ink ribbon rollers that tension this ink ribbon. It has an ink ribbon cutter with a Z ribbon guide at the tip that can be engaged with the ink ribbon in a double printer to print in any color by changing the position of the ink ribbon that overlaps the front end surface of the print head. The lever is disposed so that the ribbon guide is located on both sides of the print head leading stem, and is pivoted so that it can rotate in a direction perpendicular to the longitudinal direction of the platen, and this ink ribbon switching lever is A printer characterized by a lever 2 that similarly moves in conjunction with the approach and separation B operations of the print head from the print head.