JPS62280150A - Automatic medium oblique travel correction device - Google Patents

Abstract

PURPOSE:To automatically correct an oblique travel of a paper sheet regardless of its thickness, by simultaneously regulating an interval of one of rollers and an interval of one of guide plates in front of the rollers in a device for correcting an oblique travel of the paper sheet by a convex-shaped roller for gripping a paper sheet at a point and for feeding it and a stopping plate. CONSTITUTION:A fixed guides 24, 18 and a movable guide 20 are disposed between a convex-shaped drive roller 16 and a pressure roller 17 for feeding a paper sheet from a direction A. The roller 17 moves together with the movable guide 20. When the paper sheet 27 comes to the position of the rollers 16, 17, a magnet 25 is deenergized so that the force of a spring 22 causes the rollers 16, 17 to clamp the paper sheet 27. At the same time, the roller 16 rotates so that the paper sheet 27 is fed by the rollers 16, 21 and its oblique travel is corrected by the stopping surface of a stopper 23. The roller 16 projects a little from a guide 24 and the roller 17 from a guide a little so that the guide 20 and the roller 12 move vertically in accordance with the thickness of the paper sheet 27. With the arrangement, buckling is prevented regardless of a paper shect, whereby an oblique travel can be automatically prevented.

Description

[Detailed Description of the Invention] 3. Detailed Description of the Invention (Field of Industrial Application) The present invention relates to a printing device that handles many types of media, such as a passbook printer and a slip printer, and particularly relates to a printing device that handles various types of media, such as a passbook printer and a slip printer, and particularly relates to a printing device that handles various types of media, such as a passbook printer and a slip printer. This invention relates to an automatic skew correction device.

(Prior art) Conventionally, this type of automatic skew correction device conveys the medium sucked into the device while lightly pinching the medium with convex rollers (barrel-shaped, abacus-shaped, etc.), and prevents the medium from protruding into the conveyance path. Many of them correct skew by pressing against the abutment surface (stopper) or side frame. FIG. 2 is a perspective view of a conventional medium skew correction device, in which the medium 15, which is lightly held between the convex rollers 2 and 3, is placed in front of the convex rollers 2.3 at a stop 7 that protrudes in the middle of the conveyance path. butts against the face plate. If the medium 15 is traveling diagonally, the medium 15 rotates around the point on the edge of the medium that hit first, and stops when it evenly hits the left and right stoppers 7. In this state, the skew has been corrected. After correcting the skew, magnet 1o is ONL.

The stopper 7 is retracted from the conveyance path. Note that one of the convex rollers 2 is connected to a step motor 11. Pinion gear 12. The other convex roller 3 is rotated by a driven gear 13vc, is pivotally supported by a lever 4, and is pressed against the roller 2 by a tension spring 6. 5 is a rotation support shaft of the lever 4, 8 is a stone puff 0 rotation support shaft, and 9 is a link between the lower end of the stopper 7 and the magnet 100.

In the conventional example shown in FIG. 3, the convex roller 14 is arranged diagonally, and the medium 15 is corrected by hitting the stopper 29 and the side frame 30.

(Problems to be Solved by the Invention) The above-mentioned skew correction device has a weight of 30kliJ to 45kli because the medium hits the stopper and the side frame.
! So-called thin paper, which has a certain degree of stiffness, has drawbacks when it does not function properly, such as buckling, bending, or wrinkling at the part where it hits the paper.

(Means for Solving the Problems) The automatic skew correction device of the present invention includes a pair of convex rollers and an abutting face plate (stopper) for positioning the medium.

(side frame, etc.) and a pair of medium guides whose spacing can be freely changed.

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

FIG. 1 is a longitudinal cross-sectional view of an embodiment of the present invention that utilizes the conventional convex roller and stopper mechanism explained in FIG. 1G is a convex (acoustic ball type) drive roller, 17 is a convex (acoustic ball type) pressure roller, and 18 is a lever that supports the convex pressure roller 17, and is rotatably supported by a rotary support shaft 19. has been done. 20 is a movable medium guide fixed to the convex pressure roller 170 rotation support shaft 21 via a bracket 31;
2 is a spring acting on the other end of the lever 18;
A pressing force is applied to the pressure roller 17'g via the lever 18'. Reference numeral 23 denotes a skew correction stopper that can be retracted from the conveyance path using a magnet (not shown), and has a vertical abutting face plate. The details of this configuration are as explained in the conventional example shown in FIG. Reference numeral 24 denotes a fixed medium guide, which is arranged along the conveyance path with a distance from the movable medium guide 20VC. Reference numeral 25 denotes a magnet that acts on the other end of the lever 18, and its bias allows the convex pressure roller 17 and the movable medium guide 20 to be retracted from the conveyance path via the lever 18. 26Vi link.

27V1 medium (paper), 28 is a lower fixed medium guide.

Next, the operation of the above structure will be explained. Before the medium 27 is conveyed, the magnet 25 is turned on and the pressure roller 1
7 and the movable medium guide 20 are retracted from the medium conveyance path.

The medium 27i1 is fed from the left side of FIG. Media 27t - Clamp. Simultaneously with the clamping, the convex drive roller 16 begins to rotate. At this time, if other rollers are clamping the medium 27, they are all released. The medium 27 is a roller 16°171/C
The skew is corrected by being conveyed further and hitting the abutting face plate of the stopper 23.

Here, the convex drive roller 16 protrudes from the fixed medium guide 24 by a minute amount (approximately 0.3 to 0.51), and the convex pressure roller 17 also protrudes from the movable medium guide 20 by a minute amount (about 0.3 to 0.51). , 5B) is prominent. therefore,
The distance between these medium guides 20 and 24 is about 0.6 to 11, and the medium 27 sandwiched between them is difficult to buckle, so that even a thin medium can be corrected for skew. Also,
It also works well for thick media since the spacing of the media guides varies according to the thickness of the media. It should be noted that the present invention can be implemented in the same manner as in the conventional example shown in FIG. 3, in which the convex rollers are arranged diagonally.

(Effects of the Invention) As explained above, the present invention has the effect of making it possible to automatically correct skew regardless of the thickness of the medium by making the interval between the medium guides variable according to the thickness of the medium. .

[Brief explanation of drawings]

FIG. 1 is a longitudinal sectional view of an automatic medium skew correction device according to an embodiment of the present invention, FIG. 2 is a perspective view of an example of a conventional skew correction device, and FIG. 3 is another conventional example. FIG. 15.27... Medium, 2.16... Convex drive roller, 3.17... Convex W7' pressure roller. 6.22...Tension spring, 7.23.29...Stopper, 5.8,19.21...Rotation support shaft, 10.2
5...Yagnet, 14...Convex roller. 18...Pressure roller/<-120...Movable side medium guide. 24...Fixed side medium guide.

Claims (2)

[Claims] (1) comprising a pair of convex rollers that convey the medium while holding it at one point, and an abutment face plate for positioning the medium provided at a position forward of the convex rollers in the medium conveyance direction; In the automatic skew correction device that corrects skew of a medium by pressing the medium against the abutment face plate with the convex roller, a pair of medium guides with a variable interval are arranged to sandwich the medium from both sides. An automatic media skew correction device comprising: (2) One of the pair of convex rollers is pivotally supported so that its clamping pressure is variable, and one of the pair of medium guides is connected to the shaft support of the convex roller on the side where the clamping pressure is variable. 2. The automatic skew correction device for a medium according to claim 1, wherein the distance between the pair of medium guides changes according to the thickness of the medium.