JPH02282131A - Paper feed mechanism - Google Patents

Abstract

PURPOSE:To decrease an inserting angle for causing direct collision of a paper form with a recording paper form separating plate when any thicker and more stiff paper sheet in fed, by providing a tension bracket which presses the plate face of the recording paper form separating plate against a feeding roller and supports a separating plate fixing member by a guide portion which is circumferentially movable about the rotary shaft of the feeding roller. CONSTITUTION:A separating plate fixing member 3 is normally fixed at a position of (A). But when any thicker and more stiff paper form such as a postcard is fed, the fixing member 3 is moved to a position of (B) along a moving guide 4a on a tension bracket 4, abutting to the surface of a feeding roller 1, to fix by itself. In the position of (A), multiple feeding of thinner recording paper form can be avoided to obtain stable paper feeding by a recording paper separating plate 2 supported by the separating plate fixing member 3. While in the position of (B), the angle of the separating plate 2 becomes gentle with respect to an inserting angle of recording paper form 10, thus the inserting angle for causing collision of any thicker and more stiff paper form 10 with the separating plate 2 decreases. Thereby, pickmiss during paper form feeding can be prevented.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a paper feeding mechanism, and particularly to a paper feeding mechanism for a recording apparatus that uses cut paper as recording paper.

[Conventional technology]

Conventionally, in this type of paper feeding mechanism, a recording paper peeling plate is held by a peeling plate fixing portion, and the peeling plate mounting member is pulled by a spring so as to press the recording paper peeling plate against a paper feeding roller from a fixed direction.

[Problem to be solved by the invention]

In the conventional paper feeding mechanism described above, the recording paper release plate is pressed in a fixed direction of the paper feed roller, so the contact relationship between the recording paper release plate and the recording paper is constant, and the rigidity varies depending on the thickness. There is a drawback that a stable paper feeding operation cannot be maintained when feeding various types of recording paper.

An object of the present invention is to change the direction in which the recording paper peeling plate contacts the paper feed roller without changing the frictional force between the recording paper and the recording paper peeling plate, so that the leading edge of the recording paper is brought into contact with the recording paper peeling plate. It is an object of the present invention to provide a paper feeding mechanism that can change the collision angle, set an insertion angle suitable for various types of recording paper, and provide stable paper feeding operation.

[Means to solve the problem]

The paper feeding mechanism of the present invention includes a paper feeding mechanism that feeds cut recording paper that has been pushed in by a paper feeding roller and a recording paper peeling plate after frictionally separating the sheets. It has a fixing member and a tension bracket that presses the plate surface of the recording paper peeling plate against the paper feed roller and supports the peeling plate fixing member by a guide part that is movable in the circumferential direction around the rotation axis of the paper feed roller. Consisted of.

〔Example〕

Next, the present invention will be explained with reference to the drawings.

FIG. 1 is a side view of an embodiment of the present invention, in which a recording paper peeling plate 2 and a peeling plate fixing member 3 holding the recording paper peeling plate 2 are arranged below the paper feed roller 1. The paper feed roller 1 and the recording paper peeling plate 2 are brought into contact with each other by a tension bracket 4 mounted with a peeling plate fixing member 3 and tensioned by a tension spring 7 about a stud 8 as an axis.

The peeling plate fixing member 3, which has a gear section at its lower part, is attached to the shaft 5 by rotating a knob 9 from the outside on a tension bracket 4, which is provided with a movable guide 4a along a curvature centered on the center of the paper feed roller 1. , through the action of gear 6. Normally, the release plate fixing member 3 is fixed at the position indicated by the solid line (■), but when feeding thick and rigid paper such as postcards, it is fed along the moving guide 4a on the tension bracket 4. While touching one side of the paper roller, move to the position indicated by the dotted line ■ and fix it.

FIGS. 2(a) and 2(b) show the states of the recording paper peeling plate 2 shown in (1) and (2) in the explanation of FIG. 1. In FIG. 2 (a), since the angle θ between the recording paper peeling plate 2 and the recording paper 10 is large, when the recording paper 10 is a highly rigid paper such as a postcard, the recording paper 10 is However, with thin recording paper, multi-feeding can be avoided and stable paper feeding can be achieved.In Fig. 2(b), the angle of the recording paper peeling plate 2 is adjusted to The angle θ' becomes smaller because it is gentler than the insertion angle of the paper 10. Therefore, the recording paper 10 is less likely to dig into the recording paper peeling plate 2, but it is possible to obtain a penetration suitable for thick recording paper. When recording paper is thin, there is a high possibility that multiple sheets will be fed.

〔Effect of the invention〕

As explained above, the paper feeding mechanism of the present invention changes the insertion angle of the recording paper, and reduces the insertion angle at which it collides directly with the recording paper peeling plate when feeding thick and rigid paper such as postcards. This makes it easier to mesh the recording paper with the paper feed roller, prevents picking errors during paper feeding, and provides stable paper feeding.

[Brief explanation of drawings]

FIG. 1 is a side view of one embodiment of the present invention, and FIGS. 2(a) and 2(b) are diagrams for explaining the present invention in detail. 1...Paper feed roller, 2...Recording paper peeling plate, 3...
・Peeling plate fixing member, 4...Tension bracket, 4
a...Movement guide, 6...Gear, 10...Recording paper.

Claims (1)

[Claims] In a paper feeding mechanism that uses a paper feed roller and a recording paper peeling plate to frictionally separate cumulatively pushed cut recording paper and feed the paper, a peeling plate fixing member that holds the recording paper peeling plate;
The recording paper peeling plate is characterized by having a tension bracket that presses the plate surface of the recording paper peeling plate against the paper feed roller and supports the peeling plate fixing member by a guide portion that is movable in the circumferential direction around the rotation axis of the paper feed roller. Paper feeding mechanism.