JP2939656B2 - Paper feed mechanism - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Summary] A pick roller for feeding out the paper stored in a paper storage unit, and a separating unit for separating and feeding the paper fed by the pick roller one by one are provided. Regarding the paper feed mechanism, it is an object of the present invention to provide a simple paper feed mechanism having a structure capable of reliably feeding and feeding paper, and a pair of pick rollers for feeding out paper stored in a paper storage unit, a feed roller, A sheet feeding mechanism comprising: a reverse roller that is in pressure contact with the sheet; and a separation unit that separates and feeds the paper fed by the pick roller one by one. The paper storage unit is disposed so as to be outside of the separation unit, and is inclined toward the paper discharge side of the paper storage unit toward the separation unit and inclined downward toward the paper supply side. A configuration is provided in which a weir having a slant portion for separating sheets is provided.

[Industrial applications]

The present invention relates to a paper feed mechanism including a pick roller that feeds out a sheet stored in a paper feed unit, and a separation unit that separates and feeds the sheets fed by the pick roller one by one. is there.

[Conventional technology]

In this type of paper feed mechanism, it is necessary to reliably feed the paper and feed it.
Separating means having the structure shown in the figure is used.

In the case of FIG. 4, a plurality of feed rollers 1 and reverse rollers 2 of the separating means are arranged in a staggered manner so that the sheet 100 is separated.

In the case of FIG. 5, the widths of the feed roller 3 and the reverse roller 4 are changed.

[Problems to be solved by the invention]

However, each of the above-mentioned conventional structures has the following disadvantages.

 In the case of FIG. 4, the structure becomes complicated.

In addition, in the case of FIG. 5, if the sheet separation performance is improved, the sheet separation performance intended by the combination of the feed roller and the separation roller is reduced. This is because the pressure, frictional force and roller width required for separating the paper must be changed.

SUMMARY OF THE INVENTION An object of the present invention is to provide a simple sheet feeding mechanism having a structure capable of reliably feeding and feeding sheets.

[Means for solving the problem]

In order to achieve the above object, according to the present invention, a pair of pick rollers for feeding out a sheet stored in a sheet storage unit, a feed roller and a reverse roller which presses against the feed roller and rotates in the same direction as the feed roller. Consisting of rollers and
A sheet feeding mechanism including a separating unit that separates and feeds the sheets fed by the pick roller one by one, wherein a feed roller and a reverse roller that constitute the separating unit each include a pair of rollers; The pick rollers are arranged such that the outer end face of each pick roller is located outside the outer end face of the separating means including the corresponding feed roller and reverse roller, and the inner end face of each pick roller corresponds to each feed roller. And at a position outside the inner end face of the separating means including the reverse roller and inside the outer end face of the separating means, and toward the sheet discharging side of the sheet storage section toward the separating means. A configuration is provided in which a weir for separating sheets is provided, which has an inclined portion that protrudes and is inclined downward toward the sheet feeding side.

[Action]

Since at least a part of the pick roller is located outside the separating means, the sheet can be reliably separated without changing the width of the reverse roller and the feed roller, and the separating performance does not decrease. Also, the structure is simple.

Further, since the sheet storage section is provided with a weir having an inclined portion protruding toward the separating means and inclined downward toward the sheet feeding side, the separating effect is further improved.

〔Example〕

An embodiment of the present invention will be described below with reference to FIGS.

FIG. 1 is a plan view showing the paper feeding mechanism of the present embodiment, and FIG. 2 is a side view of the same. In the drawing, reference numeral 11 denotes a paper storage unit and 12 denotes a paper feeding mechanism.

As shown in detail in FIG. 3, the paper feed mechanism 12 includes a pair of pick rollers 13 and separation means 14,
14 is a pair of feed rollers 15 and each feed roller
It comprises a pair of reverse rollers 16 which are in pressure contact with 15. The feed roller 15 is driven by a motor 17 (see FIG. 2).
Driven via 18, gear 19, gear 20, gear 21 and rotated clockwise in FIG. 2, the reverse roller 16 is
It is driven through gears 22 and 23 and rotates in the same direction as the feed roller 15. Also pick roller
13 is supported by an arm 24 rotatably supported on the axis of the feed roller 15, and a pulley 25, a belt 26,
It is driven via a pulley 27 and rotates in the same direction as the feed roller 15. The arm 24 is positioned by a positioning means (not shown) at a pick position where the pick roller 13 is pressed against the paper 100 in the paper storage unit 11 and a retract position where the pick roller 13 is retracted from the paper 100. I have.

Each of the pick rollers 13 described above is arranged so that at least a part thereof is located outside the separating means 14. That is,
The outer end surface of each pick roller 13 is located outside the outer end surface of the reverse roller 16 by a distance A (see FIG. 3).

At the time of paper feeding, the motor 17 is operated to position the arm 24 at the pick position. As a result, the 1
The sheet is picked up by a pick roller 13 that rotates while being pressed against the sheet 100 and sent to a separating unit 14. The fed paper 100 is fed to the feed roller 15 and the reverse roller 16.
And is fed forward by the feed roller 15,
The sheet is further conveyed by a feed roller 28 (see FIG. 1). The arm 24 is positioned at the retracted position when the sheet 100 enters between the rollers 15 and 16.

During this paper feeding, the reverse roller 16 which is pressed against the feed roller 15 is rotating in the same direction as the feed roller 15, so that even if double feed occurs, the second sheet is fed backward and only the first sheet is fed. Paper. Further, since at least a part of the pick roller 13 is disposed outside the separating means 14 and the sheet 100 is bent by the difference in the width direction, the reverse roller and the feed roller as in the conventional case of FIG. Even if the difference in width is not made, a reliable separating effect can be obtained and the separation performance does not decrease.

Further, in the present invention, a weir 29 is provided on the paper discharge side of the paper storage unit 11 and has a sloping portion that protrudes toward the separating means 14 and has a slope that is inclined downward toward the paper feed side. Since the cough 29 also has a judgment effect, the judgment effect is further improved.

Further, the structure of this example is simpler than the conventional structure shown in FIG.

〔The invention's effect〕

As described above, according to the present invention, the following various excellent effects can be obtained.

(1) It is only necessary to arrange at least a part of the pick roller outside the separating means, and the structure is simple.

(2) Due to the difference between the positions of the pick roller and the separating means in the width direction, a reliable separating effect can be obtained, and sheets can be fed one by one to the separating means.

(3) It is not necessary to make a difference between the widths of the feed roller and the reverse roller, and it is possible to prevent the separation unit from being lowered.

(4) The provision of a weir in the paper storage unit further enhances the above-mentioned sorting effect.

[Brief description of the drawings]

FIG. 1 is a plan view showing a sheet feeding mechanism according to an embodiment of the present invention, FIG. 2 is a side view of the same, FIG. 3 is a plan view showing details of main parts in FIGS. 1 and 2, and FIG. FIG. 5 is a structural explanatory view of a separating means, FIG. 5 is a structural explanatory view of another conventional separating means, in which 11 is a paper storage unit, 12 is a paper feeding mechanism, 13 is a pick roller, 14
Is a separation means 15 is a feed roller, 16 is a reverse roller, 29 is a cough,
100 is paper.

Claims (1)

(57) [Claims] 1. A pair of pick rollers (13) for feeding out a sheet stored in a sheet storage section (11); a feed roller (15); (15) and a reverse roller (16) rotating in the same direction as the pick roller (1).
And a separating means (14) for separating the paper fed by 3) one by one and feeding the separated paper, wherein a feed roller (15) and a reverse roller (15) constituting the separating means (14) are provided. 16) are each composed of a pair of rollers, and each of the pick rollers (13) is formed by a corresponding one of the feed rollers (15) whose outer end faces correspond to the respective pick rollers (13).
And an outer end surface of each pick roller (13), which is located outside the outer end surface of the separating means (14) including the reverse roller (16), includes the corresponding feed roller (15) and reverse roller (16). It is arranged so as to be located outside the inner end face of the separating means (14) and inside the outer end face of the separating means (14). A sheet feeding mechanism provided with a weir (29) for separating sheets, the inclined section protruding toward the means (14) and having an inclined portion inclined downward toward the sheet feeding side.