JPS58172143A - Paper supply device - Google Patents

Abstract

PURPOSE:To deliver a thin paper without firmness as securely as an ordinary paper in a paper supply device to deliver papers on a tray with delivery rollers by extending a flexible film attached on the tray above rollers. CONSTITUTION:At end parts 11b and 11c of an upper face 11a of a tray 11 facing to delivery rollers 12 and 14, one end 16a of a film 16 is attached and the other end 16b is extended above rollers 12 and 14. A paper 15 is guided on the film 16, and delivered to rollers 14 and 12. When the paper 15 is thin, the top part is advanced along the film 14 and caught sufficiently by rollers 14 and 12. When the paper 15 is ordinary, the top part of it pushes down to avoid the film 16, and secures a sufficient contacting area between the paper 15 and rollers 14 and 12.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a paper feeding device, and more particularly to a paper feeding device that feeds paper on a tray to a paper processing device such as a reading device using a conveyance roller.

FIGS. 1A and 1B conceptually illustrate this type of paper feeding device. This paper feeding device has a pair of upper and lower transport rollers 2.3 arranged at the ends of the tray 1, and an auxiliary transport roller 4 arranged roughly in the center of the tray 1 to assist the paper 5 on the tray 1. The roller 4 feeds the paper between transport rollers 2.3, and the transport roller 2.3 further transports the paper to a reading device (not shown).

By the way, the conveyance port in such a paper feeding device.

-The roller 2.4 has its circumferential surface fully in contact with the paper 5]-
As shown in FIG. 1(a), the tray 1 is installed so as to protrude upward from the upper surface 1a of the tray 1. Therefore, when feeding weak thin paper with such a paper feeding device, when the leading edge of the thin paper hits the transport roller 2.4, it bends considerably, and the end of the thin paper is caught by the transport roller 2.4. There were times when I couldn't do it.

Therefore, in consideration of these drawbacks, the paper feeding device shown in FIG. 1(b) was proposed. This device is designed so that the ends 1b and 1C corresponding to the transport rollers 2.4 in the tray 1 are cut and bent so that the ends of the paper 5 are guided to the uppermost part of the transport rollers 2.4. , so that the end of the thin paper can be captured by the conveying roller 2.4. However, although this paper feeding device reliably feeds weak thin paper, it reduces the contact area of the paper with the conveyance roller 2.4 when feeding normal paper. Therefore, it is not necessarily satisfied, and the part lb, 1 of l~ray 1
Since the c is cut and raised, the processing cost also increases.

In view of these problems, the present invention aims to provide a paper feeding device that can reliably convey both normal paper and weak thin paper, and that is also inexpensive. be.

In order to achieve this object, in the present invention, a film is passed between the connecting portion of the conveyance roller and the conveyance roller, and when feeding weak thin paper, the thin paper is moved by the film to the uppermost part of the conveyance roller. When the paper is normally fed, the film is bent downward by the paper and pushed away, thereby ensuring a contact area between the paper and the conveying roller.

:11:・ The present invention will be described below with reference to embodiments shown in the drawings. FIG. 2 conceptually shows a paper feeding device according to the present invention. In this figure, the tray 11, upper and lower conveyance rollers 12, 13, and auxiliary conveyance rollers 14 are substantially the same as their corresponding elements in FIG. This paper feeding device includes an end portion 11b of the upper surface 11a of the tray 11 facing the conveyance roller 12, and an upper surface 1 of the tray 11.
Open end 11C for the auxiliary conveyance roller 12 in 1a
One end 16a of the film 16 is attached to each of the two ends, and the other end 16b of the film 16 is extended above the transport rollers 12 and 14 shown at -. In addition, in Fig. 2, 15 is paper, 17
18 is a guide plate disposed above the auxiliary conveyance roller 14, and 18 is a guide plate 1 on the discharge side of the conveyance roller 12.

FIG. 3 shows how the -F film 16 is installed.

The film 16 shown in FIG. 3(a) is formed into a mouth shape, and its base end 16a is attached to the end 11b of the tray 11.
The both side tongue pieces 160 are positioned along both side end circumferential parts of the conveyance roller 12, and the ends 16b thereof face the uppermost part of the conveyance roller 12, and the film 16 shown in FIG. 3(b) is
is formed into a pentagonal shape, and its - side end 16a is connected to the tray 11.
3- Attaching it to the opening end 11C, and attaching it to the tip 16b□
is facing the uppermost central portion of the auxiliary conveyance roller 14. Further, the film 16 shown in FIG. 3(C) is
a> is formed into a mouth shape, and its base end 16a
is attached to the end portion 11b of the tray 11. This film 16 differs from the one shown in FIG. 3(a) in that the width between the tongues 100 on both sides is wider than the width of the conveyance roller 12, but in other respects the film 16 differs from the one shown in FIG. 3(a). There is no difference, and the end portions 16b of the tongue portions 16C on both sides extend to a position and height corresponding to the uppermost portion of the conveyance roller 12.

The operation of the paper feeding device described above will be explained below. Tray 11
The paper 15 placed on the paper 15 is manually transferred to the transport port
When the paper 15 is pushed in the direction of the
is guided onto the film 16 before reaching . At this time, if the paper 15 is a thin paper with weak stiffness, the leading edge of the paper advances along the film 16, and the auxiliary conveyance roller
4 and captured by the rollers 4
- It is sent in the direction of the conveyance roller 12. Also, regular paper 1
5, the leading edge of the paper presses down and removes the film 16, thereby causing the paper 15 and the auxiliary conveyance roller 14 to
A sufficient contact area is ensured, and the paper 15 is sent toward the transport roller 12 with sufficient transport force, just as in the conventional paper feeder shown in FIG. Next, the paper 15 is guided onto the film 16 before the transport roller 12, and is fed from the transport roller 12 to a paper processing device such as a reading device in the same manner as in the case of the auxiliary transport roller 14 described above.

Note that the conveyance rollers 12, 13, and 14 shown in the above embodiments
The width of the film 16 is approximately 40 ttua, 25 mm, and 30 mm thick, respectively, and the film 16 is a polyethylene terephthalate film with a thickness of 0.1 to 0.15 mm.
It is about marriage.

The present invention has been described based on Example-F, but in short, the present invention utilizes the elasticity of the film, and in the case of weak thin paper, guides the thin paper above the conveying roller, and In the case of stiff paper, the film is removed downward to ensure a sufficient contact area with the transport roller, and the shape i+3 and arrangement of the film can take various forms. Also, in the example, l, l? Although a paper feeding device equipped with an auxiliary conveyance roller is shown, it goes without saying that a paper feeding device to which the present invention is applied may not be equipped with this auxiliary conveyance roller.

As described above, the paper feeding device according to the present invention can reliably transport not only normal paper but also weak paper.
Furthermore, the structure is extremely simple.

[Brief explanation of the drawing]

FIGS. 1(a) and (1)) are conceptual diagrams showing a conventional paper feeding device, FIG. 2 is a conceptual diagram showing a paper feeding device according to the present invention, and FIGS. 3(a) and (b). , (C) are plan views showing essential parts of a paper feeding device according to the present invention. 11... Tray, 12.14... Conveyance roller, 15
...Paper, 16...Film, 16a...One end,
16b...other end. 7-3 (b) Figure 2

Claims (1)

[Claims] In a paper feeding device that feeds paper on a tray by a transport roller, one end of the film is pasted on the tray, the other end is extended above the transport roller, and the paper is placed above the transport roller. A paper feeding device characterized by being configured to guide the paper.