JPS63202542A - Paper sheet aligning mechanism - Google Patents

Abstract

PURPOSE:To prevent the aslant feed of a paper sheet by installing a guide having a space part which can deflect the paper sheet upwardly on the paper insertion side of a feeding roller part and revolving rollers when the both side parts at the top edge of the paper sheet contact a feeding roller and deflection is generated. CONSTITUTION:A lower guide 5 and an upper guide 14 set oppositely to the lower guide 5 are installed between the first transport roller part 2 and the second transport roller guide 3, and the guide 14 is deflected so that a large space part is formed between the guides 5 and 14. The revolution of a motor 6 is connection/disconnection-transmitted to the feeding rollers 2-2 and 3-3 in the feeding roller parts 2 and 3 by the clutches 17 and 18. When the feeding roller part 2 is revolved, and the revolution of the feeding roller part 3 is suspended, a supplied paper 1 is deflected into loop form between the upper and lower guides 14 and 5. Therefore, the both edges of the aslantly supplied paper 1 contact the feeding roller part 3, and the feeding roller part 3 is driven in this state, and the aslant contact state of the paper is corrected.

Description

[Detailed Description of the Invention] [Summary] The paper aligning mechanism of the present invention includes a guide capable of bending the paper inserted into the entrance of the paper feeding roller section upward (or downward), and A paper aligning mechanism that corrects obliquely fed paper by providing means for rotating the feeding roller when the leading end surface of the paper comes into contact with the feeding roller and is deflected.

[Industrial application field]

The present invention is a paper aligning mechanism that is effective when applied to optical reading devices and printing devices that read information on paper.

In particular, large image scanner devices that move cut large sheets of paper to read the information on the paper, or block devices that print information on the paper, read the stretched sheets as they are and send the information to the central processing unit. Because data is input, garbled data occurs, reducing the reliability of processing.Therefore, there is a need for a paper aligning mechanism that can feed the paper with its insertion-side leading edge aligned with the reference plane.

[Conventional technology]

As shown in the plan view of FIG. 3(a), a conventionally widely used paper feeding mechanism for feeding paper connects a cylindrical paper contacting part made of a material with a large coefficient of friction with the paper 1. The 1st meter was formed to a length that could feed the size AO version of paper l.
The feed roller 2-2 and the second conveyance roller 3-2 are mounted on a frame (not shown) at right angles to the feeding direction of the paper l, that is, the direction of the arrow, and are also mounted as shown in the front view of fbl. First pinch roller 2- with a large friction coefficient
The first feeding roller section 2 and the second feeding roller section 3 are disposed so as to be mounted on shafts so that the pinch roller 1 and the second pinch roller 3-1 are brought into pressure contact with each other.

In addition, a flat lower guide 5 is disposed between the first conveying roller 2-2 and the second conveying roller 3-2 which are shaft-mounted in parallel, and is arranged so as to face the lower guide 5 at a constant interval. Similarly, the flat upper guide 4 is connected to the first pinch roller 2.
-1 and the second pinch roller 3-1.

A first conveyance roller 2-2 and a second conveyance roller 3-2, which feed the paper 1 into the apparatus, that is, in the direction of arrow A, are coupled to a motor 6 with belts and rotated in the direction of arrow C. The first pinch roller 2-1 and the second pinch roller 3-1, which are in pressure contact with the conveyance roller 2-2 and 3-2, are driven to rotate in the direction of the arrow.

[Problem that the invention seeks to solve]

The problem with the conventional paper aligning mechanism described above is that the first m-th feeding roller 2 and the second feeding roller section 3 are arranged perpendicularly and parallel to the paper feeding direction. As shown in Figure 3 (ta), when paper is fed to the first feeding roller section with the paper inclined at an angle of θ with respect to the axis of each roller, the second feeding roller section is also inclined at an angle of θ. This is the point indicated by the dotted chain line and fed to, for example, an optical information reading section.

Therefore, the information reading unit reads the information on the paper surface at an angle of e, but since the reading unit sequentially reads a fixed width in the direction perpendicular to the conveyance direction of the paper, if the paper is skewed, each line The information is divided and garbled data occurs, significantly reducing reliability.

An object of the present invention is to provide an inexpensive paper aligning mechanism that can automatically correct the paper fed diagonally to the normal state under the above-mentioned circumstances.

[Means for solving problems]

As shown in FIG. 1, the above-mentioned problem is caused by the upper part of the feeding roller part that conveys the paper 1 to the information reading part, that is, the paper insertion side of the second feeding roller part 3, whose central part is curved upward. By arranging the guide 14 and the flat lower guide 5 to face each other, the paper l inserted from the first feeding roller section 2 can be
forming a space in which the first
This problem is solved by the paper aligning mechanism of the present invention, which is connected to the motor 6 via a clutch 18, which rotates the feeding roller section 3 when it comes into contact with the feeding roller section 3 and is deflected.

[Effect]

In the present invention, for example, a clutch 18 that connects and disconnects rotation is disposed between the motor 6 that feeds the paper 1 and the conveyance roller 3-2 of the feed roller section 3, and the clutch 18 is connected to the next Control as follows. For example, consider a case where the paper 1 is inserted diagonally into the feeding roller section 3 whose rotation is stopped.
The tip of the inclined one side of the paper 1 comes into contact with the feeding roller section 3 and stops.

If the paper 1 is inserted in this state, the contact side will bend into the upper space of the lower guide 5, and the tip of the opposite side will move in the meantime and come into contact with the ζ feeding roller section 3. When the paper stops, it also bends, so a timer or a paper edge detection sensor is used to recognize when this state occurs.
By operating the clutch 18, the conveying roller 3 of the feeding roller section 3
Rotate -2.

Since the sheets are held and conveyed at the same time, the paper can be conveyed into the apparatus in a normal state.

〔Example〕

The present invention will be described in detail below based on embodiments shown in the drawings.

FIG. 1 shows a partially sectional front view of the sheet aligning mechanism according to the first embodiment. In the figure, the same members as in FIG. 3 are given the same symbols, and the other 14 are Upper guide to guide deflection.

17 and 18 are the first feeding roller section 2 and the second feeding roller section 3
This is a clutch that connects or disconnects the transmission of motor rotation to the motor.

The upper guide 14 is formed from a strip-shaped thin plate material that is longer than the width of the paper 1 to be fed, and is formed into a cross-sectional shape in which the central portion in front view is curved upward.

The clutches 17 and 18 are general-purpose electromagnetic clutches that control connection or disconnection of the rotational power of the motor 6 by turning the power supply ON and OFF.

To construct a paper aligning mechanism using the above members, the first pinch roller 2 has a large friction coefficient with the paper 1.
-1 and the first feeding roller unit 2 which is a pair of the first conveying roller 2-2, the second pinch roller 3-1 and the second conveying roller 3-
The second feeding roller portions 3 of the paper 1 are arranged perpendicularly and parallel to the feeding direction of the paper 1, that is, the direction of the arrow. The same structure as the conventional one is formed in which a flat plate-shaped lower guide 5 is disposed between the two.

An upper guide 14 is arranged in parallel between the first pinch roller 2-1 and the second pinch roller 3-1 so as to face the lower guide 5, and the first feed roller part 2 and the second feed roller Part 3
A clutch 17 is provided between the motor 6 that feeds the paper 1 and the first feeding roller section 2, and a clutch 18 is also provided for the second feeding roller section 3. Join via.

Then, when the clutch 17 is driven to rotate the first feeding roller section 2 and stop the second feeding roller section 3, the paper 1
is fed in the direction of the second feeding roller section 3, and the tip of one side that is inclined comes into contact with the second feeding roller section 3 and stops. When the first feeding roller section 2 is rotated for a certain period of time, the contact side is bent into the space between the upper guide 14 whose central part is curved upward and the flat lower guide 5, and the opposite side is bent between the upper guide 14 and the flat lower guide 5. After moving, the tip is stopped by the second feeding roller section 3 and remains the same (deflected), so when this happens, by holding the second feeding roller section and conveying it, the inclination is corrected and it returns to the normal state. The paper 1 can be conveyed into the inside of the apparatus.

FIG. 2 shows a second embodiment of the present invention, in which paper is fed manually by an operator. In this example, as shown in the figure, an upper guide 24 whose central portion is curved upward is disposed on the insertion side of the feed roller section 22 facing the lower guide 25, and the feed roller section 22 is connected to the clutch 27. It is coupled to the motor 6 via.

Further, a micro switch (not shown) is provided at the entrance of the feeding roller section 22 and is activated by contacting both ends of the leading edge of the paper. Even in this embodiment in which the clutch 27 is driven by turning on this microswitch, the paper 1 is bent in the space between the lower guide 25 and the upper guide 24 and the leading edge of the image comes into contact with the feeding roller section 22. By driving the clutch 27 at the same time, the inclination is corrected in the same manner as described above, and the paper can be transported in a normal state.

In the corner embodiment described above, a space allowing the paper to bend is formed by using an upper guide whose central portion is curved upward, but it goes without saying that the present invention is not limited to this guide shape. Nor.

〔Effect of the invention〕

As explained above, the present invention has an extremely simple structure and has advantages such as eliminating the need for diagonal feeding of large sheets, and can be expected to have significant economical and reliability improvement effects, and is extremely useful industrially. It is.

[Brief explanation of the drawing]

FIG. 1 is a partially cutaway front view of a paper aligning mechanism according to an embodiment of the present invention, FIG. 2 is a front sectional view showing a second embodiment of the present invention, and FIG. 3 is a conventional paper aligning mechanism. It is a figure showing a mechanism. In the figure, 1 is the paper, 2 is the first feeding roller section, 2-1 is the first pinch roller, 2-2 is the first conveyance roller, 3 is the second feeding roller section, and 3-1 is the second pinch roller. rollers, 3-2 is the second conveyance roller, 5.25 is the lower guide, 6 is the motor, 14.24 is the upper guide, 17, 18.27 are the clutches, 22 is the feeding roller section, FIG. figure

Claims (1)

[Claims] In a paper feeding configuration in which paper is fed by a feeding roller section in which a conveying roller and a pinch roller are opposed, the inserted paper (1) is bent upward on the paper insertion side of the feeding roller section (3). A guide (5
, 14), and means (6, 18) for rotating the feeding roller section (3) when the leading end surfaces of the paper (1) come into contact with the feeding roller section (3) and are bent. A paper aligning mechanism characterized by being provided with.