JPS62264140A - Sheet-like medium feed device - Google Patents

Abstract

PURPOSE:To make it possible to surely pay out sheet-like mediums one by one, by constituting a gate section with a plurality of resilient thin plates whose heights are gradually and slightly higher along the pay-out direction of the mediums, and which are stacked one upon another so that they are projected upward. CONSTITUTION:Estimating, for example, that five mediums 2A through 2B are simultaneously fed being superposed each other and come to a gate section 8, four thin resilient plates 81 through 84 serve as stoppers for the mediums, respectively, and therefore, inhibit the movement of the mediums, excepting the topmost one 2A. That is the topmost medium 2A is directly applied with a moving force from a pay-out mechanism, which is large enough to successively bend the four thin resilient plates 81 through 84 having different heights, and therefore, the topmost sheet may pass thereabove. However, the power for moving the the mediums below the topmost one, is equal to a value which is obtained by multiplying the moving power of the topmost one by a frictional coefficient obtained by the friction between the mediums, and therefore, it is gradually decreased. Accordingly, the topmost one alone may pass over the resilient thin plates 84. Accordingly, it is possible to precisely separate the mediums from each other in the gate section.

Description

[Detailed Description of the Invention] [Summary] In order to accurately feed the sheet-like media fed out from the hopper stand one by one, the present invention is configured to feed a gate section installed at a media feeding opening sequentially along the feeding direction. It is made up of multiple elastic thin plates stacked one on top of the other so that the height increases slightly.

[Industrial application field]

The present invention relates to a sheet-like medium feeding device suitable for feeding cut sheets for printing and the like.

This type of medium feeding device is required to feed out media loaded on a hopper table one by one from the top.

[Conventional technology]

A conventional cut sheet feeding device installed in a printing apparatus will be described with reference to FIG. In this figure, 1 is a hopper stand, on which a large number of cut sheets 2 are stacked. 3
Reference numeral 4 indicates a lifting platform that supports the hopper table 1 so as to be able to move up and down according to the cut paper stack, and 4 indicates a pair of pulleys 41 and 42 and an endless belt 4 for vertically moving the lift platform 3 according to the cut paper stack.
3, which adjusts the height of the uppermost cut paper on the hopper table 1 to a predetermined position. Reference numeral 5 denotes a feeding roller which comes into contact with the uppermost cut sheet and sequentially feeds it out in the direction of the arrow B by rotation in the direction of the arrow A. 6 is a gate section, also called a bulkhead, installed at the paper feed opening;
- Only the cut paper given the moving force by the feed roller 5 is allowed to climb over the slope. The feeding roller 5 and the gate section 6 constitute a cut paper feeding device. The cut sheets 2 that are fed out one by one from this device enter a pair of upper and lower roller feed rollers, and are conveyed to a printing section (not shown).

[Problem that the invention seeks to solve]

However, in the above-mentioned conventional cut paper feeding device, the cut sheets tend to separate due to static electricity, etc. (If the cut sheets do not separate from each other due to static electricity, etc., two or three sheets of cut paper overlap each other and are fed out by the feeding roller 5 and pass through the gate section 6. , the paper may move to the paper feed roller 7, and there is a problem that the paper feeding operation lacks reliability.

In view of the above-mentioned conventional situation, the present invention provides a sheet-like medium feeding device that has a good media capacity of the gate part and can reliably feed out sheet-like media such as cut paper for printing one by one. It is intended for the purpose of providing.

[Means for solving problems]

In the sheet-like medium feeding device of the present invention, as shown in FIG. It is composed of numbers 81 to 84.

[Effect]

Now, the feeding mechanism is used to feed two or more, for example, five media 2.
It is assumed that A to 2E are overlapped and delivered at the same time as shown in FIG. 2 and arrive at the gate section 8. - For example, the four elastic thin plates 81 to 84 forming the gate section serve as stoppers for the respective media, and prevent movement of all but the top medium 2A. In other words, since the medium 2A at the top is directly given a moving force by the feeding mechanism, its moving energy is large and can be transferred to four different elastic thin plates 81.
.about.84 can be sequentially deflected and passed over it. However, the medium 28.2G below it, 20.
The moving energy of 22 is the moving energy of the uppermost medium 2A multiplied by a coefficient caused by friction, and decreases sequentially, so that the medium that has passed the first elastic thin plate 81 is also stopped by the next elastic thin plate 82. The medium passing through the second elastic thin plate 82 also reaches the third elastic thin plate 83.
As a result, only the uppermost medium 2A crosses the final elastic thin plate 84.

Therefore, this gate section accurately separates the uppermost medium from the lower medium, and from here on, the medium is precisely
The sheets are fed one by one.

〔Example〕

Hereinafter, an example in which the present invention is applied to a cut sheet feeding device of a printing device will be described with reference to the drawings.゛ Fig. 1 is a front view of the main parts showing such an embodiment, where l is a hopper stand, 2 is a cut paper, 5 is a feeding roller, 8 is a gate part which is a feature of the present invention, and 9 is a hopper for supporting the gate part. This is the side plate.

As shown in the figure, the gate section 8 is composed of four elastic thin plates 81 to 84 stacked one on top of the other, the heights of which are slightly taller in order along the medium discharge direction. In the drawings, the elastic thin plates are shown spaced apart from each other to facilitate understanding. These elastic thin plates 81 to 84 each have a thickness of 0.18 mm.
It is made of polyester film with a width of 30 mm and a height of 30 to 40 fl, but the difference in the preamble is lam. These are fixed to the upper part of the hopper side plate 9 by screws 10 so as to be positioned in the widthwise center of the cut sheets 2 stacked on the hopper table 1 with their lower ends aligned and stacked one on top of the other. Specifically, the upper end of the thin plate 81 at the forefront is attached so as to protrude 61 from the upper end of the hopper side plate 9. In addition,
The upper ends of each elastic thin plate protrude by l1) in turn, and the rearmost thin plate 84 protrudes three points from the front thin plate 81.

In the gate section 8 configured in this manner, the four elastic thin plates 81 to 84 function as a stopper for the cut paper 2 sequentially fed out by the feeding roller 5, as described in detail in the operation section above. , all but the top cut paper are blocked from passing through.

Although one embodiment of the present invention has been described above, the shape and number of elastic thin plates constituting the gate portion 8 can be changed.
A more reliable media separation effect can be expected by increasing or decreasing the number of sheets or changing the thickness to change their elastic energy to suit the medium being used. It is also possible to use the conventional gate partition and this elastic thin plate together.

〔Effect of the invention〕

As described above, according to the present invention, the sheet media stacked on the hopper stand can be accurately fed and fed one by one from the top. Therefore, it can be applied to a hopper section of a printing device that uses cut paper, etc., to achieve great effects.

[Brief explanation of drawings]

Fig. 1 is a front view of main parts showing an embodiment of the present invention, Fig. 2 is a diagram for explaining the function and effect of this embodiment, and Fig. 3 shows a schematic configuration of a conventional cut paper feeding device. It is a diagram. In Figures 1 and 2, 1 is a hopper stand, 2.28 to 2E are cut sheets, 5 is a feeding roller, 8 is a gate section, 9 is a hopper side plate for supporting the gate section, IO is a screw, f-spear Monmage 1 UJJI and Hatohefu No. II+ ≦, H,, p, Shogi: 5 Se curse (Ido Manna Chichi Monthly No.
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Claims (1)

[Claims] A large number of sheet media (2) loaded on a hopper stand (1)
The medium is fed out one by one from the upper side by a feeding mechanism (5), and is fed by passing over a gate part (8) installed at the feeding opening, in which the gate part (8) is fed in order from the top side along the medium feeding direction. A sheet-like medium feeding device comprising a plurality of elastic thin plates (81 to 84) stacked one on top of the other so as to protrude upward by increasing the height little by little.