JPH0696318B2 - Automatic paper feeding mechanism - Google Patents

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a paper automatic setting-related mechanism of a printer device.

[Background of the Invention]

In conventional printers, paper was set manually,
This mechanism is not necessary because human hands can be used such as increasing the clearance between the print head platens that allows the print head to escape to the outside of the paper width. In recent years, automatic set printers have come on the market, but measures are being taken by attaching a ribbon mask between the print head and the platen. However, as the speed increases, the distance between the print head and the platen must be minimized. At that time, if the ribbon mask is deleted, the ribbon traveling position cannot be stabilized because of being caught at the edge of the paper, which makes the present invention necessary.

As a related technique of this type, there is JP-A-58-168444.

[Object of the Invention]

An object of the present invention is to reduce the operator's burden, and therefore to solve one of the problems in automatic setting in a printer device.
The present invention relates to a ribbon mechanism that is a tool.

[Summary of the Invention] In a printer, when trying to set paper automatically, the paper is passed between the print head and the platen.
Since this gap is extremely small, the ribbon is caught at the leading edge of the paper, causing the phenomenon of ribbon detachment. As a solution to this problem, it is conceivable to increase the clearance between the print head and the platen for moving the print head outside the width of the paper at the time of setting the paper. However, if the demand for miniaturization becomes stronger in the future, the width of the printer will be limited to the same width as the paper width, and it is expected that it will not be possible to move outside the paper width. Therefore, it is necessary to move the print head to the vicinity of the center of the platen and set the paper. Although it is easy to take measures against, it becomes unrealistic because of complicated mechanism for automation.

Therefore, as in the present invention, a means for automatically setting the paper while simultaneously driving the ribbon has become indispensable.

Example of Invention

Hereinafter, an embodiment of the present invention will be described in detail with reference to FIGS. 1 and 2. FIG. 1 is a sheet path and a schematic mechanical diagram at the time of automatic sheet setting, and illustrates a state after automatic sheet setting.

For example, the continuous paper 1 is set on the tractor 2, and a motor (not shown) that drives the tractor 2 for pressing the switch rotates and is inserted along the paper guide 3 between the platen 4 and the print head 5. It stops when it reaches a predetermined distance. If such an automatic setting mechanism is adopted, as shown in FIG. 2, unless the print head is moved to the vicinity of the center of the platen, the vicinity of the center of the paper will be slackened and the print head will be properly inserted between the roller 6 and the platen 4. Disappear. However, when the print head 5 is moved to the vicinity of the center, the ribbon 7 is guided by the guide roller 6 to the print head 5.
Although it is guided near the tip of the ribbon, the ribbon 7 can be wound by the ribbon motor 8 or the like, and is wound in the normal printing state. When the ribbon is stopped, the leading edge of the paper is caught and moves upward, causing an obstacle such as detachment from the print head 4.

Therefore, in the present embodiment, when the motor 7 that drives the tractor 2 is rotated, at the same time, the motor 8 that directly or indirectly drives the ribbon 7 is also driven to prevent the slack of the ribbon, and the tip portion of the print head 4 is prevented. The mechanism that prevents the ribbon 7 from coming off is adopted.

Further, in the present embodiment, the continuous paper is used for description, but the same effect can be obtained with the single-cut paper. It is also effective in a mechanism in which the ribbon motor is removed and the ribbon is wound in synchronism with the drive of the carrier equipped with the print head.

〔The invention's effect〕

According to the present invention, in a printer device for automatically setting paper, the print head can be moved to the vicinity of the center, not only can it function as a paper guide, but also ribbon detachment and the like can be solved, and the paper path near the tip of the print head can be simplified. Can be realized.

[Brief description of drawings]

FIG. 1 is a schematic side view of an automatic sheet setting mechanism, and FIG. 2 is a plan view in which a ribbon cassette is mounted. Explanation of reference numerals 1 ... continuous paper, 2 ... tractor 3 ... paper guide, 4 ... platen 5 ... print head, 6 ... guide roller 7 ... ribbon, 8 ... ribbon motor 9 ... feed roller 1, 10 ... feed roller 2 11 ... ribbon cassette

Claims (1)

[Claims] 1. A printer device comprising a platen, a print head movable in the longitudinal direction of the platen, a ribbon drive mechanism, and a paper feed mechanism, wherein the paper feed mechanism is driven by automatic paper setting to load the paper between the platen and the print head. When passing between, the ribbon drive mechanism is also driven to drive the ribbon,
An automatic paper feeding mechanism that prevents the slack of the ribbon and prevents the ribbon from moving due to the leading edge of the paper.