JPS6246682Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Technical Field of the Invention] This invention relates to a paper sheet discharge mechanism suitable for, for example, a recording apparatus using electrostatic recording paper.

[Technical background of the invention and its problems]

FIG. 1 is a side view showing the configuration of a conventional sheet ejecting mechanism, and FIG. 2 is a sectional view taken along the line A--A. In the figure, 1 is a lower discharge roller with a rubber tire 1b mounted on the shaft 1a, and 2 is an upper discharge roller with a metal tire 2b mounted on the shaft 2a. Both are rotated by, for example, a mechanical frame (not shown) of an electrostatic recording facsimile receiver. The rollers 2 are freely supported and pressed against the lower discharge roller 1 by a pressing mechanism (not shown) to form a pair of discharge rollers. A rotation drive mechanism (not shown) is attached to the lower discharge roller 1, and the roller 2
b and 1b each rotate in the direction of the arrow.

Reference numeral 3 denotes a paper tray disposed in front (downstream) of the pair of ejection rollers in the paper traveling direction, and is made of aluminum, stainless steel, plastic, etc., and is loaded with paper having the maximum width x length of the cut dimensions of the recorded paper 4. It has an area. When arranging the paper receiving tray 3, a required head height H is provided between the upper surface of the receiving tray and the common tangent of the pair of discharge rollers, and a required amount of paper 4 is placed on the receiving tray.
I'm trying to get it loaded. With the above configuration, the recorded sheets 4 are discharged one after another onto the receiving tray 3 and stacked as a paper stack 5 in accordance with the order of discharge, as shown in FIG.

FIG. 3 is a front view showing another example of the conventional mechanism, in which the widthwise central part of the paper 4 is connected to the tires 1b and 2b at both ends.
Three corrugation rollers 6, which have a slightly larger diameter and a smaller width than the outer shape of the sheet, convey corrugations while giving the paper 4 a widthwise direction. The improved rigidity prevents the cantilevered tip of the paper 4 from immediately hanging down after passing through the pair of discharge rolls, which is a disadvantage of the paper 4 shown in FIGS. 1 and 2. The aim was to maintain a stable loading order by preventing this from happening and also by preventing it from bending during travel.

In each of the above examples, the paper is ejected with the printed side facing down, and care is taken so that if the stacked paper is turned over, the pages will be arranged in the order in which they were received.

However, in such a conventional apparatus, stacking irregularities may occur due to electrostatic attraction between the recording paper and the stacker. FIG. 4 is a side view showing how such disturbances occur. After the paper 4 is fed out from the roll paper and cut by an automatic cutter, it is passed through various components related to the electrostatic recording process such as an electrostatic recording head, a developing device, a fixing device, etc., and a paper feeding roll disposed between these components. It reaches the ejection mechanism through conveyance parts (not shown) such as fixed guides, but during this time, it is charged with positive frictional charge due to relative movement or contact/separation with each of the components and conveyance parts, and the electrostatic pressure is reaching several tens of volts. With the paper 4 charged in this way, the leading edge of the ejected paper passes through the pair of ejection rolls 1 and 2 and then travels in the air for a certain distance, but if the balance between the paper's own weight and rigidity is lost, it will fall into the receiving tray. It falls towards the direction and finally touches the saucer 3. At this time, the electrostatic adsorption force in the direction of the arrow 7 acts between the leading edge of the paper 4 and the saucer 3 due to the electrical charge, and the leading edge 4a of the paper 4 is restrained due to the frictional force between the paper and the saucer. As the discharge operation progresses, the succeeding portion curves upward and protrudes as shown in 4b, and the sheet 4 remains in the tray 3.
stay on top. As a result, subsequent ejected sheets collide with the convex portion 4b, resulting in disturbance in stacking.
The method shown in FIG. 3 is effective to some extent in preventing such a protrusion phenomenon, but it is hardly effective when the paper cut length is long. Although this phenomenon depends on the paper quality and charging characteristics of the paper, it is noticeable when the humidity is low, and it tends to occur when the paper is discharged with the printed side facing down as described above. When the paper passes through the electrostatic recording head, an electrostatic charge pattern of several tens of volts to about 100 volts is generated on the printing surface of the paper, depending on the recording signal. Since most of it is neutralized in the subsequent development process, it does not cause the above-mentioned trouble.

Furthermore, this protrusion phenomenon is not unique to electrostatic recording; for example, in a device that uses a wet development direction, such as a diazo copier, the paper becomes wet or moistened by the developer, which increases the frictional force. It also occurs due to

[Purpose of invention]

The purpose of this invention is to provide a paper ejecting mechanism that prevents the above-mentioned conventional protrusion phenomenon and stacks paper sheets in an orderly manner.

[Summary of the idea]

In order to achieve the above object, this invention provides a movable member that applies forced vibration in a direction perpendicular to the direction of travel of the paper sheet being transferred from the roller to the paper sheet receiving member. This is a paper ejecting mechanism that removes the constraint state of the leading edge of the paper and stacks the paper on the paper receiving member in an orderly manner.

[Example of idea]

Embodiments of this invention shown in the drawings will be described below.

FIG. 5 is a plan view showing an embodiment of this invention, FIG. 6 is a sectional view taken along line AA, and FIG. 7 is a sectional view taken along line BB. In these drawings, 1 is a lower discharge roller with the same structure as explained in the conventional example, and 2 is also an upper discharge roller with the same structure as explained in the conventional example, and a metal tire 2b mounted on its shaft 2a. ，
For example, the axis 2a in the middle part of 2b has a cross section of 6
A square cam 11 is fixed. The pair of ejection rollers 1 and 2 are supported by the mechanism frame (not shown) of the electrostatic recording facsimile receiver as in the conventional example, and the upper ejection roller 2 is pressed against the lower ejection roller 1 by a pressing mechanism (not shown). They are pressed and rotated in the directions of the arrows. 12 is a shaft suspended on the frame, 13 is a swinging rod as a movable member that is rotatably mounted on this shaft 12, and the axial position of the swinging rod 13 is regulated by a retaining ring 14. has been done. Then, the swinging rod 13 moves to the sixth position due to its own weight.
Since a clockwise moment is acting in the figure, its abdomen is in contact with the cam 11, and since the cam 11 rotates with the rotation of the shaft 2a, it performs a rocking motion around the shaft 12. On the other hand, the tip end 15 of the swinging rod 13 is designed to slightly intersect with the paper ejection surface by the pair of ejection rolls 1 and 2.

Note that the outer shape of the cam 11 is at least as large as that of the metal tire 2.
Care must be taken to ensure that it fits within the inscribed circle of b.
This is to prevent interference between the ejected paper 4 and the cam 11. In the configurations of FIGS. 5 to 7, the parts other than those described above are the same as those of FIGS. 1 to 3, so the same reference numerals are given and the explanation thereof will be omitted.

With the above configuration, one pair of discharge rolls,
The paper 4 as a sheet fed out from the paper sheet 2 is regulated in its traveling direction slightly downward by the tip 15 of the swinging rod 13, and the movement of the paper 4 is regulated slightly downward by the tip 15 of the swinging rod 13. The object is struck at the abutting part of the object, and vibrations are constantly applied in the vertical direction. Therefore, returning to FIG. 4, if the abdomen is about to protrude due to the restraint of the leading edge 4a of the paper as shown in the same figure, this tendency is suppressed and the vertical vibration of the paper is prevented from static at the leading edge 4a of the paper. Since the motion in the direction perpendicular to the direction A of the electrostatic adhesion force is derived, the paper 4 becomes extremely slippery on the receiving tray 3, and the above-mentioned protrusion phenomenon and the accompanying stacking disorder can be prevented.

FIG. 8 is a plan view showing another embodiment of this invention, and FIGS. 9 and 10 are sectional views taken along line AA and line BB, respectively. In these figures, each component is completely the same as the embodiment shown in FIGS. 5 to 7, so the same reference numerals are given and a part of the explanation thereof will be omitted. In this embodiment, the upper discharge roll 2 is arranged so as to be inclined with respect to the lower discharge roll 1 and press it from above.As a result, the direction in which the paper is delivered by the pair of discharge rollers 1 and 2 is relative to the upper surface of the tray 3. Even if the swinging rod 13 is provided, the effect of ensuring a sufficient dimension corresponding to the head H explained in FIG. 2 can be obtained.

That is, in the case of the embodiments shown in FIGS. 5 to 7, the feeding direction of the paper 4 is excessively restricted by the swinging rod 13, and the dimension corresponding to the head H becomes small, so that the paper stacking on the receiving tray 3 becomes difficult. There is a risk that the capacity may not be sufficient or the leading edge of the paper at the ejection port may collide with the side of the tail of the loaded paper, causing disturbances in the stacking. However, in the embodiments shown in FIGS. 8 to 10, there is no need for these measures, and, for example, in the embodiments shown in FIGS. There is an advantage that the upper horizontal portion of the upper cover of the device can be used as it is as the saucer 3.

It should be noted that although the above embodiment describes the paper ejecting mechanism of an electrostatic facsimile receiving device, the present invention is not limited to the above embodiment. That is,
It is also useful as a paper ejecting mechanism for wet-type diazo copy machines where the leading edge of paper sheets is easily constrained. Also,
The roller 1 can be constituted by a belt.

[Effect of idea]

As explained above, in the present invention, by bringing a movable member such as a swinging rod into contact with the upper surface of the recorded paper sheet fed out from the discharge roll, the traveling range of the paper sheet is regulated from above. At the same time, the paper sheet is subjected to forced vibration in a direction approximately perpendicular to the direction in which the paper travels, so
This method alleviates the constraint on the leading edge of the paper sheet caused by frictional electrification and wetting of the paper sheet, and prevents the subsequent part of the paper sheet from protruding upward due to the constraint, thereby preventing the paper sheet from being ejected. They can be loaded in order.

[Brief explanation of the drawing]

Fig. 1 is a side view showing a conventional mechanism, Fig. 2 is a sectional view taken along line A-A in Fig. 1, Fig. 3 is a front view showing other conventional mechanisms, and Fig. 4 is a side view of these conventional mechanisms. FIG. 3 is an explanatory diagram of a loading defect phenomenon that occurs. 5 to 7 show an embodiment of the paper sheet ejection mechanism of this invention, FIG. 5 is a plan view thereof, and FIGS. 6 and 7 are sectional views taken along line AA and line B in FIG. 5, respectively. 8 to 10 show other embodiments of the invention, FIG. 8 is a plan view thereof, and FIGS. 9 and 10 are sectional views taken along A-A in FIG. It is a BB sectional view. 1, 2...Roller, 2a...Roller shaft, 3...
Receiver (paper leaf receiving member), 4...Paper (paper leaf), 11...
...cam, 12... shaft, 13... swinging rod (movable member).

Claims (1)

[Scope of Claim for Utility Model Registration] (1) A roller that transports paper sheets while sandwiching them between other members, and a roller that extends in the transport direction of the paper sheets that are transported by this roller, and the leading edge of the paper sheets that are being transported. a sheet receiving member on which a sheet is placed while in contact with the roller; and a movable member disposed at least partially between the roller and the sheet receiving member and movable in a direction intersecting a sheet conveying surface. , and a cam that drives the movable member, the movable member imparts vibration to the paper sheet discharged from the roller to the paper sheet receiving member, so as to relieve the binding of the leading edge of the paper sheet due to contact. A paper sheet ejection mechanism characterized by: (2) The paper sheet discharging mechanism according to claim (1) of the utility model registration, wherein the movable member is pivotally supported at one end. (3) The paper sheet discharging mechanism according to claim 1 or 2, wherein the cam is provided on the shaft of the roller. (4) The tangential plane of the abutment part between the roller that transfers the paper sheet while pinching it and another member is inclined with respect to the paper stacking surface of the paper sheet receiving member, and the tangential plane and the paper stacking surface are A paper sheet discharging mechanism according to claim (1) of claim 1, wherein the intersection line is set upstream of the roller with respect to the paper transport direction. (5) The paper ejecting mechanism according to claim (4) of the utility model registration, characterized in that the paper stacking surface of the paper receiving member is horizontal.