JPH03192061A - Paper discharging device - Google Patents

Abstract

PURPOSE:To smoothly discharge paper forms without giving any flaw thereon independently of the quantity of the paper form, in the device for discharging the paper forms into a paper receiving part while shaping the paper forms. CONSTITUTION:When a very small quantity of one set of finishing-processed paper forms pass between a pair of shaping rollers, each upper side shaping roller 29 is pushed up against its dead weight by the passing paper form and one set of paper forms are shaped under the action of their dead weights. Further, even when the finishing process is not carried out, one set of paper forms are transported, while being shaped by the rollers 29 and 30 under the action of their dead weights. When an increased quantity of bound paper forms pass, a bearing 46 is pushed up by the passing paper forms and the bearing 46 makes contact with a spring receiving piece 47, and further the spring receiving piece 47 is pushed up against the tension of a compression spring 48. Resultantly, after the roller 29 is raised by the gap (delta), the roller 29 is urged in the direction approaching to the roller 30.

Description

[Detailed Description of the Invention] [Field of Industrial Application] The present invention relates to a sheet discharge method that applies a film to a set of finished sheets of paper, etc., and then discharges the sheets to a predetermined paper tray. Regarding equipment.

[Conventional technology]

A paper discharge device of the above type is installed, for example, in a copy paper finishing device as shown in FIG.

Here, in explaining the prior art, the functions of this copy paper finishing processing apparatus will be explained below.

This copy paper finishing processing device is connected to a copying device (not shown), and in this copy paper finishing processing device, copy paper is bound using staples.

Copy paper (paper) that has been copied and comes out of the copying apparatus main body (not shown) advances in the direction of arrow d and enters the copy paper finishing processing device 3. When the copy paper is fed directly from this copy paper finishing processing device 3 to the next unit (for example, a sorter, etc.), the copy paper that has entered the copy paper finishing processing device 3 passes through the copy paper passage 15. and is discharged as is in the direction of arrow e.

Although not shown in FIG. 5, the copy paper path 15 is provided with a plurality of shifting rollers and side stoppers for aligning the copy paper toward the back side, and the side stoppers are arranged at intervals of, for example, 30 ao at the back. The side stops on the front side can be retracted into the passageway 15, and the copy paper can be brought to either of the side stops as required. Further, two sensors 132 and 133 are arranged in the copy paper path 15,
Based on the passing time of the copy paper during this period, it is determined whether the copy paper has passed normally.

When executing a mode in which the copy paper is guided and stored inside the copy paper finishing processing device 3 without being ejected outside the copy paper finishing device 3 or the above-mentioned binding is performed, the copy paper is guided by the deflection claw 16 to prevent its progress. Direction changed copy paper path 1
It will lead you to 7.

When the copy paper is directly led to the paper output tray 32 without the above-mentioned binding, the copy paper is transferred to the copy paper path 1.
7, the paper passes through the copy paper path 18, and is sent by a pair of transport rollers 19, 20 between a pair of transport rollers 24, 25 on the downstream side. Then a pair of paper ejection rollers 29
', 30' and is discharged in the direction of arrow B and stored on the paper discharge tray 32. At this time, the switching pawl 26 occupies the position shown in FIG.

The copy paper discharged to the paper discharge tray 32 is detected by the sensor 138.
detects the upper surface of the stacked copy paper, and controls the operation of the paper ejection tray 32 in the vertical direction so that the upper surface of the stacked copy sheets is always at a constant position.

In the above-mentioned binding mode, the deflection claw 22 is switched to the position shown in FIG. It is sent out in the direction of arrow H from between the endless belt 23 and the transport roller 19, which are constantly rotating in the direction of the arrow, and rides on the staple binding table 33 consisting of a fixed table 33A and a movable table 33B. In this mode, when the copy paper passes through the copy paper path 15, the copy paper is moved only by the side stopper located on the front side.

In FIG. 5, the reference numeral 34 is a stapler, which is movable in the direction of the arrow shown in the figure and in the direction perpendicular to the figure, depending on the size of the copy paper.

This stapler section is provided with two stapler sections, a first stapler section and a second stapler section, and each stapler section can move independently in the vertical direction. Note that the above-mentioned movable table 33B can move in the direction of the arrow in conjunction with the movement of the stapler 34.

In FIGS. 5 and 6, the copy paper discharged in the direction of arrow H and placed on the stapling table 33 is
With a set of multiple sheets of copy paper 100 aligned by the alignment stopper member 35 and all placed on the stapling table 33, the stapler 34 moves to the desired binding position to staple the set of copy paper 100. Copy paper is bound with staples. In this case, there are cases in which only one part is bound, and there are also cases in which two parts are bound.

4- When this binding is completed, the alignment stopper member 35 is retracted to the imaginary line position in FIG. 6. Note that the copy sheets discharged in the H direction are placed one by one on the staple binding table 33 by the shifting belt 36 shown in FIG.
The rotation of the stapler table 33 causes the stapler to be aligned with a side stopper (not shown) provided on the front side of the stapler table 33. In the end, a set of copy sheets is aligned and bound by the alignment stopper member 35 and a side stopper (not shown). This shifting belt 23 is not shown in FIG. 6 to avoid cluttering the drawing.

The relay unit 37, which includes a pair of transport rollers 24, 25, a switching claw 26, etc., is held in the position shown in FIG.
The copy paper 100 that has been bound is moved to the alignment stopper member 3
5, it slides on the fixed table 33A and is held between the pair of conveyance rollers 24 and 25 of the relay unit 37.

Both rollers 24 and 25 are driven to rotate in the direction of the arrow shown in the figure, and when the copy paper 100 is sent to the position shown by the imaginary line in FIG. After the copy paper 100 has advanced a predetermined distance, the rotation of both rollers is stopped, and the copy paper 100 is temporarily stopped at this position.

Note that among the pair of conveyance rollers 24 and 25, roller 25
is biased in the direction of arrow f by the elasticity of a spring (not shown), and is adapted to accommodate differences in the thickness of a set of multiple sheets of copy paper. In addition, the switching claw 26 is connected to the copy paper 1
It occupies the position shown in Figure 6 that does not obstruct the approach of 00.

As shown in FIG. 6, a set of multiple sheets of copy paper 100
While the relay unit 37 remains at the imaginary line position, the relay unit 37 rotates counterclockwise in the figure around the pivot 38 and stops at the position shown in FIG.

In this state, the pair of conveyance rollers 24 of the unit 37,
25 is placed in a position facing the pair of paper ejection rollers 29' and 30'. Next, the conveyance rollers 24 and 25 on the relay unit 37 side rotate in the opposite direction, and accordingly,
A set of multiple sheets of copy paper 100 is sent out from the relay unit 37, passes between the paper ejection rollers 29' and 30', and is stored in the paper ejection tray 32.

In this way, a set of multiple sheets of copy paper is bound and stored in the paper output tray 32, but if the number of sheets to be bound is very small, for example, about 2 to 3 sheets, Because the overall strength of the body is weakened, a set of multiple sheets of copy paper will curl up, and this will cause the paper output tray 3
There is a risk that the items will be piled up in a disorderly manner. In addition, there are cases where the copy paper is not bound, but in this case, the copy paper is ejected one by one to the paper output tray 32, so if copy paper that is weak is used, The sheets curl up and are stacked on the paper discharge tray 32 in a disorderly manner.

In order to deal with this problem, a film forming roller is used as the paper ejecting roller, as shown in FIG. 1, for example, so as to give stiffness to the ejected copy paper. In this example, the lower paper ejection roller 30 has flanges 30b on both sides.

In such a paper ejecting device, taking into account that the number of sheets of copy paper that has been finished by binding etc. is very large, it is necessary to eject it smoothly.
One of the paper ejection rollers, which is movable up and down, is biased by a spring or the like to pressurize the other paper ejection rollers, thereby increasing its conveying force.

[Problem to be solved by the invention]

However, in this case, when the number of sheets to be bound is very small, or when copy sheets are ejected one by one to the paper ejection tray 32 without binding, the above-mentioned pressurizing force will cause the copy paper to become loose at the flange 30b. Copy paper becomes easily scratched.

The object of the present invention is to be able to perform a corresponding ejection and conveyance function when the number of finished sheets is large, and when the number of finished sheets is very small or only one sheet is used. An object of the present invention is to provide a paper ejecting device that can smoothly eject paper without damaging it using a film-forming roller when printing the paper.

[Means to solve the problem]

In order to achieve the above object, the present invention provides a sheet discharging device including a pair of film forming rollers for applying a film to paper and discharging the paper to a paper tray, the film forming roller being one of the film forming rollers. When a set of paper with a small number of finished sheets or a sheet of paper without finishing processing passes, it is pushed up against the roller's own weight by the paper passing through, and a set of paper with a large number of finished sheets passes. The present invention proposes a configuration in which the film forming roller is pushed up by the passing paper and then urged in a direction toward the other film forming roller.

〔Example〕

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

In FIG. 1, one of the lower film forming rollers 30 is provided with flanges 30b on both sides of a roller portion 30a, as described above. The other upper film forming roller 29 is a single roller, and the lower film forming roller 3 is flat.
It rides on the roller part 30a of 0 with its own weight.

The lower film-forming roller 30 is a driving, side film-forming roller, and when the paper passes between the two film-forming rollers 29 and 30 while being stiffened with a predetermined conveying force, the upper film is The application roller 29 rotates following the movement of the paper.

When such a pair of film-forming rollers is used to eject a set of multiple sheets of finished paper, the paper receivers such as the paper ejection tray 32 (FIG. 5) are properly aligned. There is a tendency for people to be accommodated. However, when the number of sheets to be bound increases and the weight of a set of sheets increases, it is not enough to rely on the weight of the film forming roller 29, and the film forming roller 29 is moved by a spring or the like.
The paper is conveyed by applying pressure to the paper.

FIG. 4 shows an example of a pressurizing means that has been commonly used up until now. A shaft 40 to which the film forming roller 29 is fixed is rotatably supported by a bearing 42, and this bearing 42 is movable up and down with respect to the main body side plate 43'.
Due to the elasticity of the film forming roller 29, the film forming roller 30
is under pressure. When a set of multiple sheets of finished paper passes through, the film forming roller 29 is pushed up by the paper that passes against the elasticity of the spring 44, and in this state, the set of multiple sheets of paper is pushed up. I can sit on it.

However, between the film forming rollers configured in this way,
If a very small number of bound sheets of paper or a single sheet of paper that is not bound is passed through, there is a risk that the paper will be damaged by the flange 30b due to the force of the spring. .

The present invention is intended to solve such technical problems.

In FIG. 1, one end of a shaft 41 to which the film forming roller 30 is fixed is rotatably supported by a main body side plate 43 via a bearing 45, and the other end is also connected to the main body on the other side, although not shown. It is rotatably supported by a side plate and configured to be rotationally driven by a drive device (not shown).

On the other hand, a bearing 46 is attached to one end of a shaft 40 to which the film forming roller 29 is fixed, and the shaft 40 is rotatable relative to this bearing 46. Similarly, the other end of the shaft 40 is similarly configured although not shown.

As shown in FIG. 2, the protruding portion 46a of the bearing 46 is fitted into the lower narrow width portion of the opening guide portion 43A provided on the side plate 43 of the main body. Further, a protruding portion 47a of a spring receiver piece 47 is fitted into the upper wide portion of the opening guide portion 43A. This spring holder has a compression spring 48 between the bridge and the side plate of the main body.
is interposed, and the protruding portion 47a of the spring holder piece 47 opens the opening guide portion 43A under the action of the elasticity of the compression spring 48.
It engages with a stepped portion 43A1 (FIG. 3) at the boundary between the wide portion and the narrow portion.

In Figures 1 and 2, when a very small set of 12-sheets that have been bound or otherwise finished pass between both film-forming rollers, the upper film is applied by the passing paper. The roller 29 is pushed up against its own weight, and under the action of this own weight, the set of sheets is stiffened. The range in which the film forming roller 29 is pushed up against its own weight is within the gap δ between the bearing 46 and the spring bearing piece 47, and within this range, only its own weight acts on the paper, and the compression spring Note that even when finishing processing such as binding processing is not performed, a sheet of paper is conveyed while being stiffened by the film forming rollers 29 and 30 under the action of its own weight. .

On the other hand, when a large number of bound sheets passes, the bearing 46 is first pushed up by the passing paper, and then the bearing 46 comes into contact with the spring holder 47.
Furthermore, the spring receiver pushes up the piece 47 against the elasticity of the compression spring 48.

The amount of rise of the spring holder 47 varies depending on the number of sheets of paper, but in any case, at a predetermined raised position, the film forming roller 29 is substantially pressed by the elasticity of the spring 48, and - I can feel my waist on the paper. In the end, after the film forming roller 29 has risen by the gap δ, it is urged in the direction toward the film forming roller 30. Now, if the pressing force between the film forming rollers is N and the friction coefficient between the film forming roller and the paper is μ, then the paper conveyance force F is μN. Therefore, by increasing the pressing force N using a spring or the like, the paper conveying force can be increased.

In addition, if stiffening only under the action of the body's own weight is insufficient, a compression spring smaller than the elasticity of the spring 48 may be inserted between the bearing 46 and the spring receiver piece 47.

〔Effect of the invention〕

According to the configuration of the present invention, when a very small set of finished paper or a single sheet of paper is conveyed while being held steady, the paper is not damaged by the film forming roller, and When transporting a large set of finished paper, it is possible to transport it with sufficient support. No matter what, you can always store them neatly in the paper tray.

[Brief explanation of drawings]

FIG. 1 is a partially cutaway front view of a paper ejecting device according to an embodiment of the present invention;
FIG. 2 is a side view of the pressure component of the film forming roller, FIG. 3 is a side view of the main body side plate of the pressure component, FIG. 4 is a perspective view of the conventional pressure component, and FIG. 5 is a side view of the pressure component of the film forming roller. A side view of a copy paper finishing processing device equipped with a conventional paper ejecting device, FIG. 6 is a side view of a paper deflection component after copy paper finishing processing, and FIG. 7 is a side view of a copy paper finishing processing device equipped with a conventional paper ejection device. FIG. 7 is an operational diagram from FIG. 6 showing a state in which the position has been changed; 29.30... Film forming roller

Claims (1)

[Claims] A sheet discharging device equipped with a pair of film-forming rollers for applying a film to paper and discharging the paper to a paper receiving section, the film-forming roller being used to collect a set of a small number of finished sheets. When paper or a single sheet of paper that has not been finished is passed through, it is pushed up against the roller's own weight by the passing paper, and when a large number of finished papers are passed through, it is pushed up by the passing paper. A sheet discharging device characterized in that the film forming roller is biased in a direction toward the other film forming roller after being pushed up.