JP4587615B2 - Paper orientation conversion device - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a paper direction conversion device that converts a vertical paper into a horizontal paper.
[0002]
[Prior art]
For example, there is a case where a vertical paper discharged from the printing apparatus is converted into a horizontal paper and conveyed to a post-processing device such as bookbinding. In this case, a paper direction changing device that changes the direction of the paper while conveying the paper between the printing device and the post-processing device is disposed. As such a paper direction changing device, the paper conveying force is obtained from a belt installed on the conveying surface and a ball pressing the paper, and the rotational force for changing the paper direction can be rotated or stopped independently. Obtained from two sets of rollers, a pair of rotating roller and idler roller, that changes direction while checking the position of the sheet to be conveyed and the rotation state of the sheet with a sensor, or a pivot that is the rotation center of the pair of conveying roller and sheet The one using is known.
[0003]
[Problems to be solved by the invention]
However, in the paper direction changing apparatus using the former belt and the conveying force of the ball pressing the paper and the rotational force of the two pairs of rollers which are a pair of the rotating roller and the idle roller, the ball is rotated while the paper is rotating. Therefore, it is necessary to control the ball to be separated from the belt. Further, in the paper direction changing device using the latter conveying roller pair and the pivot serving as the rotation center of the paper, it is necessary to perform the pivot operation and the control for pressing or separating the one conveying roller pair against the paper. The conversion device also has a problem of requiring a complicated mechanism and control. In addition, any of the paper direction conversion devices may transport the paper from above to below or horizontally, but there is a problem that it is difficult to transport the paper from below.
[0004]
The present invention has been made to solve such a problem, and enables rotation of a sheet with a simple mechanism and simple control, and from above to below, from below to above, and in any horizontal direction. Another object of the present invention is to provide a paper direction changing device capable of transporting paper.
[0005]
[Means for Solving the Problems]
According to the first aspect of the present invention, a pair of conveying belts that face each other and insert and convey a sheet therebetween, and a rotation that is arranged on the same axis and abutting on the sheet conveyed by the conveying belt are spaced apart from each other speed has two b over La which was individually controllable, wherein a sheet direction changing device for changing the direction of the paper abuts against the two rollers based on the rotational speed difference of the two rollers a paper detection sensor for detecting the leading and trailing ends of the sheet passing in front Symbol two b over la above, to detect the leading end of the sheet of the paper detection sensor, after a predetermined time the two b over And a controller for controlling the rotational speed of the two rollers to the rotational speed difference when the paper detection sensor detects the trailing edge of the paper. .
[0007]
In the present invention, since the sheet to be conveyed is held lightly between a pair of conveying belts arranged on the conveying surface and opposed to each other, a conveying force is applied to the sheet, so that the pair of conveying belts can always run at a constant speed. In addition, there is no need for complicated control of the conveyance means accompanying the rotation of the paper, and it is possible to carry the paper in any direction from the top to the bottom, from the bottom to the top, and in the horizontal direction by being held by a pair of transport belts. Become. In addition, a rotational force is applied to the transported paper by, for example, two rotational speed variable rollers provided with a speed difference of about 2 times, and the paper is on the two rotational speed variable rollers when a desired rotation is obtained. Since the speeds of the two rotation speed variable rollers are made equal, the paper can be rotated at high speed only by the speed control of the two rotation speed variable rollers, and a complicated operation mechanism for rotating the paper is not required. The mechanism can be simplified.
[0008]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, embodiments of the present invention will be described with reference to the drawings. FIG. 1 is a plan view of a paper direction changing apparatus according to an embodiment of the present invention, FIG. 2 is a side view, FIG. 3 is an enlarged view for explaining the operation of FIG. 1, and FIG.
[0009]
In the figure, 1 is a flat guide plate, 2 is a side guide plate, 3 is a conveyance belt, 4 is a conveyance belt for holding paper, 5 is a drive pulley, 5a and 6 are driven pulleys, 7 and 8 are rollers, 9 and 10 Is a stepping motor, 11 is a sheet detection sensor, 12 is a sheet, and 13 is an idle roller (reference numeral is shown in FIG. 2).
[0010]
The conveyor belt 3 is stretched over a driving pulley 5 and a driven pulley 5a installed at both ends of the conveyor section. Similarly, the conveyor belt 4 is stretched over a driven pulley 6, and both the conveyor belts 3 and 4 are in light contact with each other by tension. The sheet 12 faces the sheet 12 positioned between the two conveying belts 3 and 4 so that a slight conveying force is applied to the sheet 12 and moves at a constant speed across the conveying section.
[0011]
The roller 7 is rotated by the rotation of the stepping motor 10, and the roller 8 is rotated by the rotation of the stepping motor 9. The two rollers 7 and 8 are separately located on both outer sides of the conveyor belt 3 that are equidistant from the center line of the conveyor belt 3 and are arranged side by side on the same axis. An idle roller 13 that presses 12 against the roller is provided. The paper detection sensor 11 is installed at a position on the same axis line between the two rollers 7 and 8, and the paper 12 detects the passage of the two rollers 7 and 8.
[0012]
The lower drive pulley 14 shown in FIG. 2 drives, for example, a conveying belt for carrying the paper discharged from the printing press into the paper direction changing device, and the paper direction changing device shown in each drawing is substantially vertical. It shows a state where the paper is conveyed from below to above.
[0013]
When the paper direction changing device configured as described above converts the paper direction by 90 degrees, as shown in FIG. 4, the roller 7 is set to a high speed with the speed of the conveyor belts 3 and 4 as a reference. The roller 8 is set slower than the reference speed by making the roller 7 faster, and the rollers 7 and 8 are driven to rotate at the set speed. Then, the central portion of the paper 12 is inserted between the moving conveyor belts 3 and 4, and the paper 12 is conveyed by the conveyor belts 3 and 4. When the leading edge of the paper 12 reaches the rollers 8 and 7, the paper detection sensor 11 detects the leading edge and outputs it.
[0014]
On the other hand, the sheet 12 is pressed against the idle roller 13 and pressed against the rollers 7 and 8, and the center of the conveyor belts 3 and 4 is moved by the speed difference between the rollers 7 and 8 as indicated by reference numeral 12a in FIGS. It rotates as a fulcrum (the holding force by the conveyor belts 3 and 4 is set small). This rotation is continued while the sheet 12 is in contact with the rollers 7 and 8, and is rotated 90 degrees as indicated by reference numeral 12b in FIGS.
[0015]
In the control device (not shown), a time from when the paper 12 contacts the rollers 7 and 8 until it rotates approximately 90 degrees (this time does not change in the size range from A3 to A5) is set. Then, the detection signal of the leading edge of the paper 12 of the paper detection sensor 11 is input and measurement of this time is started. Then, as shown in FIG. 4, when the set time is reached, the rotational speed of the rollers 7 and 8 is controlled to the speed of the conveyor belts 3 and 4, and this speed is maintained until the paper detection signal from the paper detection sensor 11 disappears, that is, the paper 12 Is continued until it does not contact the rollers 7 and 8. When the paper detection signal disappears, the rollers 7 and 8 are returned to the original speed difference, and the next paper is rotated. This rotation does not have to be strict 90 degrees, and the angle can be set to a desired 90 degrees by the contact between the rotated paper and the side guide plate 2.
[0016]
In the above embodiment, the paper direction changing device is installed vertically and the paper is conveyed from below to above. However, the paper may be conveyed from above to below. It goes without saying that can be installed horizontally.
[0017]
【The invention's effect】
As described above, according to the present invention, since the paper to be conveyed contacts the roller and immediately starts to rotate, it can be rotated at a high speed in a short conveyance path, and the space including the vertical direction by the installation of the paper direction changing device is also provided. Can be reduced.
[Brief description of the drawings]
FIG. 1 is a plan view of a sheet direction changing apparatus according to an embodiment of the present invention.
FIG. 2 is a side view of the paper direction changing device shown in FIG.
FIG. 3 is an enlarged view for explaining the operation of the paper direction changing device shown in FIG. 1;
FIG. 4 is a diagram illustrating operation timings of the paper direction conversion apparatus shown in FIG.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Flat guide plate 2 Side guide plate 3 Conveying belt 4 Conveying belt 5 for holding paper Drive pulley 5a, 6 Driven pulley 7, 8 Roller (rotational speed variable roller)
9, 10 Stepping motor 11 Paper detection sensor 12 Paper 13 Idle roller

Claims (2)

A pair of conveying belts that face each other and insert a sheet therebetween to convey, and a rotational speed that is arranged at an interval on the same axis that contacts the sheet conveyed by the conveying belt, can be individually controlled 2 A paper direction changing device that has two rollers and changes the direction of the paper that contacts the two rollers based on a difference in rotational speed between the two rollers, the leading edge of the paper passing over the two rollers And a paper detection sensor for detecting the trailing edge of the paper, a leading edge of the paper of the paper detection sensor, and controlling the rotational speeds of the two rollers at a constant speed after a predetermined time has elapsed. And a control device that controls a rotational speed difference between the two rollers to the rotational speed difference when an end is detected. Paper direction changing device according to claim 1, characterized by comprising the two directions of abutting sheet to the two rollers by the rotational speed difference before and SL and a predetermined time of the roller by converting 90 degrees.

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