JPS6133716B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a one-time carbon ribbon feeding device used in serial printers, typewriters, and the like.

Conventionally, so-called one-time carbon ribbons, which are used only once and then discarded, have been used in serial printers, typewriters, and the like. In other words, these one-time carbon ribbons (hereinafter simply referred to as ribbons) are used to transfer the carbon on the ribbon to printing paper by impact or thermal transfer to form a printed image, but after the transfer is completed, Carbon cannot be reused and is simply disposed of. Therefore, with this type of ribbon, it is inevitable that the ribbon must be replaced frequently, which requires dirty hands and troublesome operations.

It is an object of the present invention to overcome the conventional disadvantages associated with such ribbon feeding devices.

To achieve this goal, the ribbon feed is stopped while the carriage carrying the print head is printing and moving along the print line, and the final print column (which may be in the middle of the print line) is When the carriage returns to the left end after printing,
When the ribbon is fed out by the same amount as the return amount, when the end of the ribbon is detected, the carriage is reciprocated several times to perform empty feeding, and all of the used ribbon is automatically removed from the outside. It was decided that the waste would be discharged to

Hereinafter, a detailed explanation will be given based on the illustrated embodiment. In the above and following explanations, left and right refer to the left and right when a person faces a typewriter or the like.

FIGS. 1 and 2 schematically show the main parts of a one-time carbon ribbon feeding device. Print head 3
Carriage 1 equipped with a pair of guide rails 2
A wire pulley 6 is guided by the control motor 8 and is attached to the shaft of the control motor 8, and a driven wire pulley 7
It is moved along the print line on the print paper 18 by the wire 5 that is placed between the print sheets. On the other hand, the timing pulley 9, which rotates coaxially with the wire pulley 7, transmits rotation to the ribbon feed timing pulley 10 via the timing belt 11. This ribbon feed timing pulley 10 is connected to a ribbon feed roller 13 via a coaxial one-way clutch 12.
It is connected to the. This one-way clutch 12 transmits the rotation to the ribbon feed roller 13 only when the ribbon feed timing pulley 10 is rotated counterclockwise when viewed from above, that is, when the carriage 1 moves to the left. However, in the opposite case, it is not transmitted. The ribbon 15 is in the form of a roll and passes from a supply section consisting of a spool shaft 16 and a guide 19 provided at the right end of the print line between the front surface of the print head 3 and the print paper 18 along the print line, and then passes through the left end of the print line. The ribbon is stretched so as to reach a transfer section consisting of a pressure roller 14 and a ribbon feed roller 13 provided in the ribbon. 4 is a wiring for transmitting a signal current for selectively driving the printing head, and 17 is a container for storing the used ribbon 15.
Furthermore, the amount of movement of the wire 5 and the ribbon feed roller 1
The amount of rotation of the outer periphery of No. 3 is set in advance to be equal to the rotation amount of the outer circumference of No. 3.

Next, the operation of the one-time carbon ribbon feeding device described above will be explained.

The carriage 1 moves from left to right along the print line as the control motor 8 rotates clockwise, and the print head 3 prints data on the print paper 18 via the ribbon 15. When printing is completed in the middle of the line or at the right end, a return command is given, the control motor 8 is reversed, and the carriage 1 returns to the left and stops when it reaches the left end. During this return movement, the wire pulley 7 and the timing pulley 9 rotate counterclockwise when viewed from above, and the ribbon feed timing pulley 10 also rotates counterclockwise. As the ribbon feed timing pulley rotates counterclockwise, one-way clutch 12 engages and transmits rotation to ribbon feed roller 13. Therefore, the ribbon 15 is fed from the right to the left. At this time, the amount of movement of the wire 5 and the ribbon feed roller 1
Since the outer diameters of the relevant pulleys and rollers are set so that the amount of rotation of the outer periphery of the ribbon 15 is the same, the amount of movement of the carriage 1 and the amount of movement of the ribbon 15 are ultimately the same. Note that while the control motor 8 is rotating clockwise, and thus the carriage 1 is moving from the left to the right, the one-way clutch 12 is not engaged, so the ribbon feed timing pulley 10 rotates at the ribbon feed timing. The ribbon 15 remains stationary without being transmitted to the roller 13. Therefore, when, for example, ABCDEF is printed on the printing paper 18 as shown in FIG. 2, the used portion of the ribbon 15-1 becomes a hatched portion that extends to the right as printing progresses. However, when the carriage 1 returns to the left end 0 after printing the letter F, for example, the carriage 1
The ribbon 15 also moves to the left by an amount L, which is equal to the amount of movement L, and enters the state shown at 15-2. That is,
The ribbon 15 moves and prints just before the carriage 1 returns and is moved by the amount that has been used. In addition, in Figure 2, ribbons 15-1 and 15
-2 is shown separated into upper and lower parts, but they are separated to show the time-separated state, and they are actually a single ribbon. In this way, the ribbon 15 is fed out by the printed amount, so there is no part that is fed out without being transferred, and the ribbon is used over its entire length without waste.

The present invention is constructed by combining the one-time carbon ribbon feeding device as described above with the ribbon end detection device shown in FIG. Next, a description will be given with reference to FIG.

The used ribbon 15 is placed on the ribbon feed roller 1
3 and the pressure roller 14, and are discharged to the outside.
It is accommodated in the container 17. Spool shaft 16
When the unused portion of the ribbon 15, which is set at The signal current is sent to a control circuit (not shown), and the signal current to the print head 3 is cut off, and then the control motor 8 is stopped. Then, the control motor 8 is rotated clockwise and counterclockwise by a predetermined angle a predetermined number of times to repeat normal and reverse rotations by a well-known means, thereby reciprocating the wire 5, that is, the carriage 1 from side to side. As a result, the remaining ribbon 15 is sent only to the left by the function of the transfer section, and all of it is sent to the container 1.
It is housed in 7. Incidentally, after the predetermined rotation is completed, it is preferable to transmit a ribbon alarm signal or the like to urge the handler to attach the unused ribbon. Container 17
Dispose of used ribbons appropriately.

As explained above, according to the present invention, there is an advantage that used ribbons can be easily discharged and stored without getting one's hands dirty.

[Brief explanation of the drawing]

FIG. 1 is a perspective view showing the main parts of a one-time carbon ribbon feeding device, FIG. 2 is an explanatory diagram of the operation of the ribbon in FIG. 1, and FIG. 3 is a ribbon end detection diagram showing an embodiment of the present invention. FIG. 1...carriage, 2...guide rail, 3...
...Print head, 4...Wiring, 5...Wire, 6,7...Wire pulley, 8...Control motor, 9...Timing pulley, 10...Ribbon feed timing pulley, 11...Timing belt, 12... ...One-way clutch, 13... Ribbon feed roller, 14... Pressure roller, 15...
One-time carbon ribbon, 16...Spool shaft, 18...Print paper, 19...Guide, 2
0, 21...detection section.

Claims (1)

[Claims] 1. A carriage that can freely move left and right along the printing line;
a one-way clutch that transmits the movement of the carriage only when the carriage moves to the left; a supply section located at the right end of the print line for supplying the one-time carbon ribbon; In the one-time carbon ribbon feeding device, which consists of a transfer section that draws out the one-time carbon ribbon from the above-mentioned supply section and sends it out to the outside in response to the transmission force of the clutch, there is a one-time carbon ribbon end detection section at the right end of the printing line. A one-time carbon ribbon feeding device characterized in that the carriage is reciprocated a predetermined number of times in response to this detection, and the entire one-time carbon ribbon is sent out to the outside.