JP2005059993A - Paper discharging device of image forming device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a paper discharging device capable of surely loading paper and realizing excellent paper aligning property. <P>SOLUTION: This device is provided with a paper loading table 6 disposed along a paper advancing direction to be elevatable, a paper aligning member 7 disposed at a position where the paper loading table 6 is raised and disposed along a direction orthogonal to the paper advancing direction, a pair of paper aligning members 7 disposed at the position where the paper loading table 6 is raised and disposed in parallel to the paper advancing direction, and a paper edge detecting device 21 for detecting a paper traveling position of the printed paper 1. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

  The present invention relates to a paper discharge device connected to a subsequent stage of an image forming apparatus such as a copying machine or a laser beam printer.

  In the paper discharge device of the image forming apparatus, printed paper is discharged, and the printed paper is aligned in the paper traveling direction and the direction orthogonal to the paper traveling direction (paper width direction) in consideration of post-processing such as bookbinding. Various proposals using a paper alignment member that reciprocally slides in a direction perpendicular to the paper traveling direction have been made.

However, in the prior art, the paper travel position sent to the paper discharge device is a variation in the paper travel in the image forming apparatus, a variation in the relative position of the image forming apparatus and the paper discharge apparatus, and a combination of two or three paper discharge devices. The paper running position fluctuates due to variations in the relative position between the paper discharge devices
An error occurs in the relative position between the paper alignment member and the paper travel position provided in parallel with the paper travel direction, causing problems such as paper colliding with the jogger and paper entering the lower side of the jogger. It is difficult to ensure alignment.

  An object of the present invention is to provide a paper discharge device that solves the above-described problems and realizes good paper alignment of printed paper discharged into the paper discharge device.

  The object is to move up and down a paper stacking table that is arranged along the paper traveling direction, and a paper alignment member that is disposed at a position where the paper stacking table is raised and is disposed along the direction orthogonal to the paper traveling direction. The sheet stacking table is arranged at a raised position and is provided with a sheet aligning member disposed in parallel with the sheet traveling direction and arranged in pairs.

  ADVANTAGE OF THE INVENTION According to this invention, the paper discharge apparatus which can stack | stack a paper reliably and can implement | achieve favorable paper alignment can be provided.

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

  As shown in FIGS. 1, 2, 3, and 4, the paper discharge device 2 is disposed and connected to the rear of the image forming apparatus 3 such as a copying machine and a laser printer, and is sent from the image forming apparatus 3. A paper edge detection device 21 comprising a CCD sensor 19 and an LED 20 for detecting the orthogonal direction position of the printed paper 1 in the traveling direction, and the printed paper 1 is distributed and sent to the operator side or the non-operator side in the next stage. A pair of sheet transport rollers 4, a sheet stacking table 6 that stacks and stores the printed sheets 1 supported by the sheet transport roller pair 4 so as to be movable up and down, and a printed sheet disposed in parallel with the stack sheet traveling direction 1 is a slidable sheet alignment member 7 (hereinafter referred to as “sheet slidable sheet aligning member 7”) that repeatedly presses both edge portions parallel to the direction of travel 1 to align the printed sheet 1 in a direction perpendicular to the direction of travel of the sheet. Slidable paper alignment member 8 that is arranged in a direction perpendicular to the stack paper travel direction and aligns the printed paper 1 in the paper travel direction by repeatedly pressing the front end of the printed paper 1. (Hereinafter referred to as a leading end stopper), a position detecting means 17 for the jogger 7, a position detecting means 18 for the leading end stopper 8, and a rotating member that presses the rear end of the printed sheet 1 on the sheet stacking table 6 in the orthogonal direction. 9, a comb-like sheet trailing edge stopper 15 that is erected and fixed at a fixed position in the vicinity of the rotating member 9, and a plurality of sheets arranged to hold the upper surface of the printed sheet 1 discharged onto the sheet stacking table 6. The paper upper surface pressing roller 5 and the stacked paper upper surface detecting means 10 for detecting the upper surface of the paper stacking surface. The joggers 7a and 7b and the stopper 8 are provided on the upper part of the paper stacking table 6. The jogger 7 and the front end stopper 8 are printed paper 1 stacked with the power from the motor 12 via the power transmission belt 13 and the drive shaft 14. It is slid according to the size.

  Here, when printing is started in the image forming apparatus 3, the non-operator-side jogger 7a (hereinafter referred to as a rear jogger), the operator-side jogger 7b (hereinafter referred to as a front jogger), and the leading end stopper 8 are provided as position detection means. After the home position is detected, the travel position of the paper fed from the image forming apparatus or the paper discharge device provided in the previous stage is detected by the paper edge detection device 21 including the CCD sensor 19 and the LED 20 and the home. The relative errors of the joggers 7a and 7b defined from the positions are calculated, the joggers 7a and 7b move to positions where the errors are corrected, and the stopper 8 moves to the specified position according to the paper size to be printed.

  At that time, the stacked position of the printed sheets 1 on the sheet stacking table 6 is sorted and conveyed to either the operator side or the counter operator side by a conveyance stacking mechanism of a pair of sheet conveyance rollers 4 (not shown). For example, when the printed paper 1 is conveyed to the operator side, the rear jogger 7a moves to a position near the corrected paper position on the counter operator side parallel to the traveling direction of the printed paper 1 and stops.

  On the other hand, the front jogger 7b stands by at a position further away from the corrected paper position on the operator side parallel to the traveling direction of the printed paper 1 to the operator side by a specified amount. On the contrary, when the printed paper 1 is transported to the non-operator side, the front jogger 7b stops moving to a position near the corrected paper position on the operator side parallel to the traveling direction of the printed paper 1, and the rear jogger 7a prints. It waits at a position further away from the corrected paper position on the non-operator side parallel to the traveling direction of the finished paper 1 by a specified amount further to the non-operator side.

  Regardless of the direction in which the printed sheet 1 is conveyed and stacked, the leading end stopper 8 moves to a position near the leading edge of the printed sheet 1 in the advancing direction and stands by. Thereafter, when the printed sheet 1 is discharged from the sheet conveying roller pair 4 and stacked on the sheet stacking table 6, the rear jogger 7 a and the leading end stopper 8 are conveyed to the operator side when being stacked on the counter operator side. When stacking, the front jogger 7b and the leading end stopper 8 push the paper in the direction of the respective opposing paper edges. In the case of the jogger 7, the stop side jogger 7 acts as a stopper, and in the case of the leading end stopper 8, the trailing edge of the sheet. 15 serves as a stopper to align the printed paper 1.

  By repeating the reciprocating operation of pushing back the paper edge portion where the operating side jogger 7 and the leading end stopper 8 are opposed to each stopper and returning to the standby position for each printed paper conveyed to the paper discharge device, various sizes of paper are obtained. It is possible to align all the printing papers without any irregularities.

  The rear jogger 7a, the front jogger 7b, the tip stopper 8, the motor 12, the jogger 7, and the position detectors 17 and 18 of the tip stopper 8 are arranged above the raised position of the sheet stacking table 6, thereby printing the image forming apparatus 3. If the transport stacking direction is changed to the operator side or the non-operator side several times in order to sort the printed sheets 1 on the way, when the jogger 7 once moves in the specified sheet width direction. The jogger 7 is moved down to a position where it does not interfere with the already stacked printed sheets 1 and then moved in the designated transport stacking direction, and the sheet stacking table 6 is moved up to a position detected by the stacked sheet upper surface detecting means 10 and again. When a large number of printed sheets 1 are stacked on the sheet stacking table 6 by stacking the printed sheets 1 on the sheet stacking table 6. Because it is not already given a load or vibration loading pre-printed sheet 1, it is possible to align without losing the paper alignment of.

  Further, the specified amount of the standby position on the reciprocating operation side of the rear jogger 7a and the front jogger 7b is set to 9 to 10 mm from the edge portion parallel to the traveling direction of the printed paper 1, and the reciprocating operation is performed from the position to the position contacting the opposite paper edge portion By doing so, the printed paper 1 is not pushed beyond the paper width, and as a result, the printed paper 1 is not vibrated, and the paper alignment can be improved.

It is a front block diagram which shows the paper stacking part of the paper discharge apparatus which concerns on the Example of this invention. FIG. 3 is a side configuration diagram illustrating a paper stacking unit of the paper discharge device according to the embodiment of the present invention. It is a side block diagram of the paper edge detection apparatus in the Example of this invention. FIG. 3 is a configuration diagram in which three paper discharge devices according to the present invention are connected.

Explanation of symbols

1 is printed paper, 2 is a paper discharge device, 3 is an image forming device, 4 is a pair of paper transport rollers, 5 is a paper upper surface pressing roller, 6 is a paper stacking table, 7 is a jogger, 7a is a rear jogger, and 7b is a front jogger. , 8 is a front end stopper, 9 is a rotating member, 10 is a loaded paper upper surface detecting means, 11 is a table arm, 12 is a motor, 13 is a power transmission belt, 14 is a drive shaft, 15 is a paper rear end stopper, and 16 is a paper rear end. Reference numeral 17 denotes an end projection, 17 denotes a jogger position detection means, 18 denotes a tip stopper detection means, 19 denotes a CCD sensor, 20 denotes an LED, and 21 denotes a paper edge detection device.

Claims (2)

  A paper edge detection device comprising a CCD sensor and an LED connected to a subsequent stage of the image forming apparatus and detecting a paper traveling position perpendicular to the paper traveling direction of the printed paper sent out from the image forming apparatus, A pair of paper transport rollers configured to change the transport direction for selectively transporting and stacking to the operator side or the non-operator side, a paper stacking table for stacking and storing the printed paper, and the paper stacking table. A table driving mechanism for raising and lowering, a control device for controlling the table driving mechanism, an upper surface detecting means for detecting the uppermost surface position of the paper, and the paper loaded on the paper stacking table arranged on the downstream side in the paper traveling direction A paper alignment member that reciprocally slides in the paper advance direction of the printed paper, a paper alignment member that is arranged on the upstream side of the paper advance direction, and the operator and the non-operator side An image forming apparatus having a pair of sheet alignment members that reciprocally slide in a direction orthogonal to the sheet traveling direction, a position detection unit for each sheet alignment member, and a drive mechanism for each sheet alignment member. In the paper discharge device, a sheet alignment member that reciprocally slides in the sheet traveling direction, a pair of sheet alignment members that reciprocally slide in a direction orthogonal to the sheet traveling direction, and a drive mechanism for the both sheet alignment members include the upper surface. At least one sheet edge detection device is disposed above a sheet stacking table that is moved up and down by a detection unit and detects a sheet traveling position that is orthogonal to the sheet traveling direction on the upstream side of the sheet conveying roller pair. A paper discharge device of the image forming apparatus. A plurality of paper discharge devices connected to the image forming apparatus, and at least one paper edge detection device is disposed.

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