JPH0295665A - Paper ejection device for office equipment - Google Patents

Abstract

(57) [Abstract] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of the Invention The present invention relates to a paper ejection device for office equipment such as facsimile machines and copying machines.

Conventional Technology Conventionally, when ejecting printed paper or originals, etc., the paper to be ejected is placed in a substantially horizontal state and then fed a certain distance in the horizontal direction, and from the ejecting section, the paper is pushed into the paper tray by its own weight. I'm letting it fall.

Problems to be Solved by the Invention A structure in which paper is fed horizontally and then discharged by natural fall into a paper discharge stocker can be constructed relatively easily if paper discharge is primarily concerned. However, when trying to set the paper path in relation to the overall structure of office equipment, the need to level the paper at the output section becomes a design constraint and complicates the overall structure. There is also a risk that it will become larger as it becomes larger.

Means for Solving the Problem: A discharging section consisting of a discharging roller and a discharging spring that contacts the discharging roller is provided at the upper end of a substantially vertical paper conveyance path, and an inlet section is provided on the side of the discharging section. Install a paper output stocker,
An elastic paper extrusion spring whose lower end is fixed to the front side of the ejecting section and on the opposite side of the ejecting stocker, and whose upper end in a free state reaches inside the entrance of the ejecting stocker is attached to the side of the ejecting roller. It was placed in

The paper ejected from the action ejection section is stored in a pile in the paper ejection stocker due to natural fall, but due to the constraints of the ejection roller and paper pressing spring, when the end of the paper is released, the paper is The end portion is pushed out into the paper ejection tray by the return force of the paper pushing spring, whereby the entire paper to be ejected is fed into the paper ejection tray and can be reliably ejected.

Example An embodiment of the present invention will be described based on the drawings.

First, below the chassis 1, there are many stacked sheets of paper 2.
A paper feed table 3 is provided for holding a sheet, and a paper separation roller 4 driven by a drive section (not shown) is provided at the tip of the sheet feed table 3 so as to be rotatable about a horizontal axis.

Further, an opening 5 is formed in the chassis 1, and a pair of bearing flanges 6 are formed upright on both sides of the opening 5 by bending. A support shaft 7 is attached to these bearing flanges 6, and a friction unit 8 is supported at one point and rotates and swings approximately at the center of this support shaft 7 (approximately the center in the axial direction of the paper separation roller 4). It can be installed freely.

The friction unit 8 is constructed using a holder 9 as a base, and the holder 9 is fitted with a flat holding surface 10, side surfaces 11 bent on both sides of the holding surface 10, and the support shaft 7. Mounting piece 1 with matching mounting holes 12 formed
It consists of 3. The holding surface 1 of this holder 9
o has a plurality of mounting holes 14 formed therein, and the side surface of the holder 9 has a paper stop surface 15 on which the paper 2 comes into contact, a horizontal surface 16, and a relatively steeply inclined surface 17. is formed.

Next, a presser member 20 made of an elastic material such as a metal plate has a planar mounting surface 18 facing the holding surface 1o of the holder 9 and a curved portion 19 curved along the outer peripheral surface of the paper separation roller 4. is provided. This pressing member 2o
A friction member 21 made of a rubber material or the like is integrally attached to the inner surface of the shaft.

In addition, the spring member 2 can be pressed by a thin spring metal plate or the like.
2 is provided. This pressing spring member 22 has a planar mounting surface 23 that joins to the lower surface of the holding surface 10 of the holder 9.
From this mounting surface 23, there is a pair of paper holding parts 24 that are close to the paper feed tray 3 and in contact with the paper separation roller 4.
is formed to extend from the lateral end of the mounting surface 23, and comes into contact with the outer circumferential surface of the paper separation roller 4 at a position further advanced in the traveling direction of the paper 2 than the paper presser part 24. A pair of paper alignment sections 25 are formed.

The press spring member 22 formed in this way, the press member 20 and the friction member 21 are connected to the holding surface 10 of the holder 9.
The friction unit 8 is configured by being connected to and integrated with the fixing bolt 26.

Further, an upright piece 27 located above the opening 5 is formed on the chassis 1, and a compression spring 28 is attached between the upright piece 27 and the friction unit 8. It is urged downward around the support shaft 7.

Next, below the paper separation roller 4, a paper guide 29 is provided that forms a U-shaped paper path. Along this paper guide 29, from below, a drive roller 31 to which an auxiliary roller 3o is pressed, a detection roller 33 to which a feed pressing spring 32 is pressed, a reading section 34, and a discharge roller 36 to which a discharge spring 35 is pressed are sequentially moved. It is arranged. This discharge roller 36 and the discharge portion spring 35
A discharge section 37 is formed by the discharge section 3.
7 is located at the upper end of the substantially vertical paper conveyance path 38 formed by the paper guide 29.

Next, the inlet section 3 located on the side of the discharge roller 36
A paper discharge stocker 4o connected to the paper feed tray 9 and located below the paper feed table 3 is provided substantially horizontally. A convex portion 41 protruding inward is formed on the edge of the discharged sheet stocker 40 on the side of the entrance portion 39, and a plurality of notches 42 are formed in the width direction.

Further, in the paper conveyance path 38, the lower end is fixed to the side opposite to the paper ejection stocker 40 in front of the ejection section 37, and the upper end in a free state reaches inside the entrance section 39 of the paper ejection stocker 40. Resilient paper pushing spring 43
are arranged on the side of the discharge roller 36. That is, the paper pushing spring 43 in the free state is set to enter into the notch 42 of the paper discharge stocker 40.

In such a configuration, a large number of sheets of paper 2 such as yX documents are placed on the paper feed tray 3 and are fed to such an extent that their leading ends contact the outer circumferential surface of the paper separation roller 4 . At this time, the paper pressing portion 24 is bent to securely press the paper 2 against the paper separation roller 4.

When the paper separation roller 4 rotates in this state, the paper 2 located at the bottom layer is fed by the frictional force with the paper separation roller 4, but the paper 2 above it is also fed by the frictional force between the sheets. receive. Then, the paper alignment section 25 located next presses the leading edge of the fed paper 2, and the leading edge of the stacked upper paper 2 is stopped by the nearly vertical paper stopper section 15 of the holder 9. At this time, the paper 2 located below, which does not come into contact with the paper stopper section 15, receives a downward force from the paper alignment section 25 and positions its leading edge in the space located below the horizontal surface 16, that is, in the descending section. and comes into contact with the steeply sloped surface 17. This steep slope 17
has an angle of approximately 60', and the leading edge of the paper 2 shifts along the inclination at this portion, thereby reducing the frictional force by momentarily converting the friction between the papers into dynamic friction. Since the lowest layer of paper 2 is continuously fed by the paper separation roller 4, the friction member 2 held by the presser member 20
Touches 1. The angle of the contact point with this friction member 21 is set to about 30'.

When the leading edge of the paper 2 reaches the position where it touches the friction member 21 as shown in step 2, only the lowest layer of paper 2 is fed out.
The paper 2 located above is stopped by the frictional force with the friction member 21, and only the lowest layer of paper 2 is reliably fed out. However, since paper feeding factors are complicated, in some cases, two or more sheets of paper 2 may get between the paper separation roller 4 and the friction member 21. exists over the entire curved range, so that the lowest layer of paper 2 is reliably separated while the stacked paper 2 is being fed. That is, the frictional force between the paper 2 and the friction member 21 is
Since the frictional force is greater than the frictional force between the sheets, separation from the bottom sheet 2 is reliably performed within the range of the curved portion of the friction member 21. Note that since the frictional force between the paper 2 and the paper separation roller 4 is greater than the frictional force between the paper 2 and the friction member 21,
- There is no problem in feeding the separated sheets of paper 2.

The paper 2 thus sent out is sent out along the paper guide 29 to the discharge stocker 4o.

During this time, the information recorded on the paper 2 is read by the reading section 34.

The paper 2 that has reached the discharge section 37 is pressed against the discharge roller 36 by the discharge section spring 35, but at this time, the paper 2 causes the paper pushing spring 43 at its leading edge to bend in the direction of the discharge roller 36. Proceed while doing so.

When the trailing edge of the paper 2 is separated from the discharge roller 36 and the discharge presser spring 35 and becomes free, the trailing edge of the paper 2 is completely pushed into the discharge tray 40 by the paper pushing spring 43. is pushed out. Therefore, the next sheet of paper 2 to be conveyed does not get under it, and is stacked one upon another in the sheet discharge tray 40 according to the discharge order. Then, the paper 2 fed into the paper output tray 40 is
Since the convex portion 41 is formed on the edge of the paper discharge tray 40, the paper discharge tray 40 is stable without bouncing and floating.

Furthermore, the friction unit 8 has a mounting piece 13 attached to the support shaft 7.
Since it is supported at one point by
The contact pressure against the paper separation roller 4 becomes uniform over the entire length of the paper separation roller 4 along its axial direction.

Therefore, the paper 2 is not skewed and is accurately fed.

Effects of the Invention As described above, the present invention provides a discharge section consisting of a discharge roller and a discharge press spring in contact with the discharge roller at the upper end of the substantially vertical paper conveyance path, and an inlet section on the side of this discharge section. a paper ejecting spring having an elastic paper extrusion spring whose lower end is fixed to the front side of the ejecting section and on the opposite side of the ejecting paper stocker, and whose upper end in a free state reaches inside the entrance section of the ejecting paper stocker; is placed on the side of the ejecting roller, so the sheets ejected from the ejecting section fall naturally and are stored in a pile in the ejecting stocker. However, due to the constraints of the ejecting roller and the paper pressing spring, When the terminal end of is opened,
The end of the paper is pushed out into the paper output tray by the return force of the paper pusher spring, so that the entire paper to be ejected is fed into the paper output tray for reliable ejection. This has the advantage that the sheets can be piled up in the discharge tray without disturbance in the order of discharge.

[Brief explanation of the drawing]

The drawings show one embodiment of the present invention, in which Fig. 1 is a vertical side view, Fig. 2 is a partial bottom view, Fig. 3 is an exploded perspective view of the friction unit, and Fig. 4 shows the end of a sheet of paper. FIG. 5 is a side view of a portion of the paper with the section opened, and FIG. 5 is a side view when the leading edge of the paper reaches the paper discharge section. 35... Ejection pressing spring, 36... Ejection roller, 37.
...Discharge section, 38... Paper transport path, 39... Entrance section, 40... Paper discharge stocker, 43... Paper extrusion spring Applicant: Tokyo Electric Co., Ltd. LL Figure

Claims (1)

[Claims] A discharge section including a discharge roller and a discharge presser spring in contact with the discharge roller is provided at the upper end of the substantially vertical paper conveyance path, and a paper discharge stocker having an entrance section is provided on the side of the discharge section.
An elastic paper extrusion spring whose lower end is fixed to the front side of the ejecting section and on the opposite side of the ejecting stocker, and whose upper end in a free state reaches inside the entrance of the ejecting stocker is attached to the side of the ejecting roller. A paper ejecting device for office equipment, characterized in that the paper ejecting device is arranged in a.