JPS63274571A - Printer paper feed mechanism - Google Patents

Abstract

PURPOSE:To feed paper securely, if it is thick, by providing a constitution where a plurality of pressure rollers are arranged in a paper feed direction and the rotary shafts of these pressure rollers are connected to a belt respectively. CONSTITUTION:Both front and rear pressure rollers 1a, 1b are provided with pulleys 3a, 3b respectively on the ends of rotary shafts of the rollers, and a belt 4 is provided across these pulleys. Paper 7 is inserted through the rear pressure roller 1b side, and when paper enters between the rear pressure rollers 1b and a platen 6, the rear pressure roller 1b is separated from the platen 6, resulting in the loss of capability to feed paper 7 of the rear pressure roller 1b itself. However, a paper feed power is conveyed to the rear pressure roller 1b through the belt 4 due to the contact with the platen 6 of the front pressure roller 1a, thus assuring secure feeding of the paper 7.

Description

Detailed Description of the Invention [Field of Industrial Application] The present invention relates to a paper feeding mechanism for a printer, and in particular to a paper feeding mechanism for a printer equipped with a pressure roller that presses against a platen to apply a paper feeding force to the paper. do.

[Prior Art] Conventionally, a paper feeding mechanism of this type of printer includes a platen and a pressure roller. The pressure roller is biased against the platen so that it can come into pressure contact with the platen.

When a sheet of paper is inserted between the platen and the pressure roller, the pressure roller applies a sheet feeding force to the sheet and prints while moving the sheet in the sheet feeding direction.

In this case, the pressure roller is connected in a direction transverse to the paper feeding direction.

[Problems to be Solved] In the paper feed mechanism of the conventional printer described above, the pressure roller was connected only in the lateral direction with respect to the paper insertion direction, so there was no connection between the platen and the pressure roller. When thick and large sheets of paper are inserted into the printer, the pressure rollers are completely separated from the platen, and there is no force to feed the sheets, making it impossible to feed the sheets.

[Means for Solving Problems] The present invention has been made to solve the above-mentioned conventional problems, and as a means for solving the problems, the present invention provides a platen and a device inserted between the platen and the platen in pressure contact with the platen. In a paper feeding mechanism of a printer including a pressure roller that applies a paper feeding force to paper, a plurality of the pressure rollers are arranged in the paper feeding direction, and the rotating shafts of the plurality of pressure rollers are each connected by a belt.

[Example] Hereinafter, five embodiments of the present invention will be described based on the drawings.

FIGS. 1 and 2 are diagrams showing one embodiment of the present invention.

In the figure, 6 is a platen, and in front of this platen 6, a printing plate 5 is arranged opposite to it. The printing rod 5 is a carriage 5C movably supported by guide shafts 5a and 5b.
The platen 6 is mounted on the platen 6 so as to be horizontally movable along the axial direction of the platen 6 via the carriage 5C.

Furthermore, two front pressure rollers la and two rear pressure rollers lb are arranged on the lower side of the platen 6 at the front and back in the paper feeding direction. These front pressure roller la and rear pressure roller 1b are each in pressure contact with the platen 6 via a spring 8, and when the paper 7 is inserted between the platen 6 and both the front and rear pressure rollers la and lb, the paper 7 The paper feeding force is applied to the paper.

Furthermore, both the front and rear pressure rollers la, lb have belt pulleys 3a, 3b at the ends of their respective rotating shafts 2a, 2b, and these belt pulleys 3a.

Pass the belt 4 over the rotating shafts 2a and 2.
I am trying to connect b.

Next, to explain the operating state, first, the paper 7 is inserted from the rear pressure roller lb side, and the paper 7 is inserted from the rear pressure roller lb side.
When the sheet 7 enters between the sheet 7 and the platen 6, the rear pressure roller 1b is separated from the platen 6, and the rear pressure roller 1b itself has no force to feed the sheet 7. However, since the front pressure roller 1a is in contact with the platen 6, the belt 4
The paper feeding force is transmitted to the rear pressure roller ib via the pressure roller ib, and the paper 7 is reliably fed.

[Effects of the Invention] As explained above, the paper feeding mechanism of the printer of the present invention is a printer including a platen and a pressure roller that presses against the platen and applies paper feeding force to the paper inserted between the platen and the platen. In the paper feeding mechanism, a plurality of pressure rollers are arranged in the paper feeding direction, and the rotating shafts of these pressure rollers are connected by belts, so that even when thick and large paper is inserted, , the paper feeding force can be transmitted to other pressure rollers via the belt, and as a result, a reliable paper feeding force can be obtained.

[Brief explanation of the drawing]

FIG. 1 is a plan view showing a paper feeding mechanism of a printer according to an embodiment of the present invention. FIG. 2 is a right side view of FIG. 1. 1a + front pressure roller 1b: rear pressure roller 2a: front pressure roller shaft 2b: vk pressure roller shaft 4: belt 6: platen 7: paper

Claims (1)

[Claims] In a paper feeding mechanism of a printer comprising a platen and a pressure roller that presses against the platen and applies paper feeding force to the paper inserted between the platen, a plurality of the pressure rollers are disposed in the paper feeding direction, and a plurality of the pressure rollers are arranged in the paper feeding direction. A paper feed mechanism for a printer, characterized in that rotating shafts of pressure rollers are connected by belts.