JP2551875Y2 - Paper ejection guide device - Google Patents

Description

[Detailed description of the invention]

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a paper ejection guide device used for a printing apparatus, a copying machine, and the like, and more particularly, to a paper ejection guide for improving the organization of a paper ejection tray. The present invention relates to a paper discharge guide device provided at a paper discharge entrance.

[0002]

2. Description of the Related Art Printed and copied sheets discharged from a printing apparatus, a copying apparatus, and the like are discharged onto a discharge tray with good order, that is, the copied sheets are discharged onto a discharge tray. It has already been proposed to provide a paper discharge guide member at the paper discharge entrance of the paper discharge table so that the papers can be stacked exactly in the paper discharge direction with good consistency. This is disclosed, for example, in Japanese Utility Model Laid-Open Publication No. 2-91747. ing.

The above-described paper discharge guide members are provided on both sides of the paper discharge inlet of the paper discharge table, and the vertical surfaces along the paper discharge direction so that the lower side is located inside the paper discharge table as compared with the upper side. The paper has a guide surface that is inclined with respect to the sheet, and gives a U-shaped curve to the sheet that is to pass through the sheet discharge inlet of the sheet discharge tray and falls onto the sheet discharge tray when viewed from the front in the sheet discharge direction. The apparent stiffness in the discharge direction of the paper, i.e., the stiffness of the paper, is increased to prevent the paper from sagging during the paper discharge process, while increasing the paper flying distance of the paper due to inertia. The sheet is always abutted against a stopper plate provided upright and is discharged onto the sheet discharge table.

[0004]

In the paper discharge guide member as described above, the longer the inclined guide surface is in the paper discharge direction and the longer the vertical guide surface, the more U-shaped the paper is when viewed from the front in the paper discharge direction. The effect of increasing the apparent rigidity in the paper discharge direction by giving a curve increases, but the longer the inclined guide surface is in the paper discharge direction and in the vertical direction, the greater the frictional resistance it gives to the paper, This, on the contrary, causes a shorter paper ejection distance of the paper. For this reason, the stiffness of the sheet itself is very weak, and even if the sheet is sufficiently given a U-shaped curve when viewed from the front in the sheet discharging direction,
If the apparent rigidity of the paper in the paper discharge direction cannot be sufficiently increased, a large guide surface will have an adverse effect, and the consistency of the paper on the paper discharge table will be deteriorated. For this reason, in the conventional paper discharge guide member, there is a case where the consistency of the paper on the paper discharge table cannot be sufficiently improved due to the difference in the type of paper to be discharged.

The present invention has been made in view of the above-mentioned problems in the conventional paper ejection guide member, and is provided on a paper ejection table regardless of the type of paper to be ejected. It is an object of the present invention to provide an improved sheet ejection guide device capable of sufficiently improving the consistency of sheets to be fed.

[0006]

SUMMARY OF THE INVENTION According to the present invention, there is provided a paper discharge guide provided on both sides of a paper discharge inlet of a paper discharge table, wherein the paper discharge guide is provided at a lower end thereof. The paper discharge guide bar includes a plurality of paper discharge guide bars suspended from the base to form a free end in the paper discharge direction, and each of the paper discharge guide bars has a paper discharge direction such that a free lower end is positioned inside the paper discharge table as compared with the upper side. Is inclined with respect to the vertical plane along which the paper discharge guide bar located at the paper discharge entrance is the largest, and the one positioned forward in the paper discharge direction is smaller, and the paper discharge guide bar is This is achieved by a paper ejection guide device characterized in that the closer to the front, the lower the paper ejection direction.

[0007]

According to the above construction, a plurality of paper discharge guide bars provided in the paper discharge direction each function as a linear inclined guide portion, whereby each paper discharge guide bar is discharged from the paper discharge table. Without giving a large frictional resistance to the paper that passes through the paper entrance and falls onto the paper output table, the paper in the paper discharging process has a U-shaped curve as viewed from the front in the paper discharging direction for a long section. Over a period of time and maintain it.

[0008]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described in detail below with reference to the accompanying drawings. FIGS. 1 to 3 show an embodiment of a paper discharge unit of a stencil printing apparatus including a paper discharge guide device according to the present invention. In these figures, reference numeral 1 designates a cylindrical plate cylinder having a printing ink passage structure. The plate cylinder 1 has a printing ink supply mechanism (not shown) inside, and the stencil sheet M is wound around the outer peripheral surface of the plate cylinder 1 so that the plate cylinder 1 is driven in a counterclockwise direction in FIG. 1 around its own central axis. Has become. A press roller 3 is disposed below the plate cylinder 1. The press roller 3 is fed from a left side to a right side in FIG. 1 by a sheet feeding device (not shown) in synchronization with the rotation of the plate cylinder 1. The printing paper P is pressed against the outer peripheral surface of the plate cylinder 1 with the stencil sheet M interposed therebetween, and by this pressing, a print image is applied to the upper surface of the printing paper P, that is, rotary stencil printing is performed. It has become so.

A paper separating claw 5 is arranged on the paper discharge side of the plate cylinder 1. The paper discharge claw 5 pulls the printing paper P off the plate cylinder 1 with the rotation of the plate cylinder 1 and discharges it. The paper feed device 7 is guided to a paper feed surface 9.

The paper feed device 7 has a transport belt 11 provided along the paper feed surface 9.
The paper feed surface 9 is driven by an electric motor (not shown).
The upper printing paper P is discharged and conveyed from the left to the right in FIG.

On both sides in the width direction at the end side of the paper feeding surface 9, triangular mountain-shaped bending protruding members 13, 15 are provided in two stages. In addition, a suction port 17 is provided at the center on the end side of the sheet feeding surface 9, and the suction port 17 is provided with an electric blower 19.
The central part in the width direction of the printing paper P on the paper feeding surface 9 is gently sucked by the negative pressure caused by the negative pressure, and the U-shaped curve as viewed from the front in the paper discharging direction of the printing paper P by the curving imparting ridges 13 and 15. It is designed to help.

The paper discharge tray 21 has a substantially horizontal bottom plate 23, side plates 25 provided on both sides in the width direction of the bottom plate 23 so as to be able to adjust their mounting positions in the width direction, and a paper discharge plate at a position forward of the bottom plate 23 in the paper discharge direction. And a stopper plate 27 erected so that the mounting position can be adjusted in the direction.

A paper discharge guide member 29 is fixedly mounted on the inner surface of the side plate 25 on the paper discharge entrance side by a screw 31.
As shown in FIGS. 4 to 6, the paper ejection guide member 29
The whole is made of a metal wire material having an appropriate spring property, the outer surface is coated with a lubricity-enhancing coating, and the loop portion 33 is formed.
Is fixed to the side plate 25 by the screw 31 and the loop portion 33
A first discharge guide bar 37 whose lower end hangs down so as to form a free end from a leading end of a horizontal extension portion 35 extending horizontally to the discharge inlet side, and discharge of the discharge table 23 from the loop portion 33. A second discharge guide bar 4 whose lower end is suspended from the tip end of the inclined extension portion 39 extending downward to the entrance side so as to form a free end.
And 1.

The second paper discharge guide bar 41 is located forward of the first paper discharge guide bar 37 in the paper discharge direction, and lower than the first paper discharge guide bar 37 due to the lowering of the inclined extension 39. Each of the paper discharge guide bars 37 and 41 has a vertical surface along the paper discharge direction such that the free lower end is located inside the paper discharge table 23 as compared with the upper side, in this case, inclined with respect to the inner surface of the side plate 25. It is inclined at angles θ1 and θ2. The inclination angle .theta.1 of the first discharge guide bar 37 is set to about 20 to 30 degrees, and the one inclination angle .theta.2 of the second discharge guide bar 4 is set to 10 to 20 degrees. First delivery guide bar 3
7, the inclination angle θ1 is larger than the inclination angle θ2 of the second discharge guide bar 4.

The first discharge guide bar 37 and the second discharge guide bar 41 each have a free lower end as compared with the upper side, and
Is inclined at inclination angles θ3 and θ4 with respect to a vertical plane perpendicular to the paper discharge direction so as to be positioned on the paper discharge inlet side. The inclination angle θ3 of the first paper ejection guide bar 37 is about 25 to 35 degrees,
The inclination angle .theta.2 of the second paper discharge guide bar 41 is set to 0 to 5 degrees.

With the above setting, the first paper ejection guide bar 37 and the second paper ejection guide bar 41 extend so as to be included in one virtual inclined plane indicated by the symbol A in FIG. become. The representative angle θ5 formed by the virtual inclined plane A with respect to the vertical plane along the sheet discharging direction may be approximately 5 degrees.

According to the above-described configuration, the paper discharge feeding device 7
The print paper P discharged toward the paper discharge table 21 by the transport belt 11 is curved in a U-shape when viewed from the front in the paper discharge direction by the suction action of the curving imparting raised members 13 and 15 and the suction port 17. As a result, in a state in which the apparent rigidity in the paper discharge direction is increased, the paper flies over the paper discharge table 21 away from the paper feed surface 9 of the paper discharge device 7 and falls on the bottom plate 23 from between the left and right side plates 25. . In the paper discharging process to the paper discharging table 21, the printing paper P is first placed on both sides of the first paper discharging guide bar 3.
7 and comes in contact with a point or a line and falls while advancing in the paper discharge direction, whereby the printing paper P is discharged without receiving a frictional resistance greater than that of the first paper discharge guide bar 37. Reinforces or maintains the U-shaped curvature as viewed from the front.

The printing paper P then falls on the second paper ejection guide bar 41 while contacting the second paper ejection guide bar 41 with a point or a line and progressing in the paper ejection direction.
The U-shaped curve as viewed from the front in the sheet discharging direction is reinforced and maintained again without receiving a frictional resistance greater than that of the second sheet discharging guide bar 41.

Since the second paper discharge guide bar 41 is lower than the first paper discharge guide bar 37, the printing paper P is dropped by the second paper discharge guide bar 41 as the print paper P falls in the paper discharge direction.
When passing through the first paper ejection guide bar 37 as described above,
1 reliably functions to reinforce and maintain the U-shaped curvature of the printing paper P when viewed from the front in the paper discharging direction.

As a result, the printing paper P is placed on the virtual inclined plane A by the two discharge guide bars, the first discharge guide bar 37 and the second discharge guide bar 41, without receiving a large frictional resistance. A U-shaped curve viewed from the front in the paper discharging direction is stably formed or maintained for a long period of the paper discharging process in a form in which the paper is guided from a virtual imaginary large inclined guide surface, and the apparent paper discharging direction is apparent. When the upper rigidity is sufficiently and surely increased, it flies over the paper discharge table 21 in the paper discharge direction. As a result, the printing paper P flies to a position where the leading edge reliably contacts the stopper plate 27 irrespective of its type, and all the printing paper P surely hits the stopper plate 27 and falls horizontally on the bottom plate 23.

As a result, regardless of the type of paper to be discharged, the print paper P on the paper discharge table 21 can be arranged in a uniform discharge direction.

[0022]

As will be understood from the above description, according to the paper ejection guide device of the present invention, a plurality of paper ejection guide bars provided in the paper ejection direction each act as a linear inclined guide portion. As a result, the paper discharge guide bar does not apply a large frictional resistance to the paper that is going to drop onto the paper discharge tray through the paper discharge inlet of the paper discharge tray, and discharges the paper in this paper discharge process. When viewed from the front, a U-shaped curvature is appropriately given over a long section and maintained, so that the apparent rigidity in the paper discharging direction can be sufficiently increased, and This ensures that the paper will fly until it hits the stopper plate of the paper ejection tray, and that the consistency of the paper on the paper ejection tray will be sufficiently improved regardless of the type of paper ejected. Paper is stacked on the paper output tray in the paper output direction. So overlaid et al was beautiful paper ejection is performed.

[Brief description of the drawings]

FIG. 1 is a side view showing an embodiment of a paper discharge device of a stencil printing apparatus including a paper discharge guide device according to the present invention.

FIG. 2 is a plan view showing an embodiment of a sheet discharging unit of the stencil printing apparatus including the sheet discharging guide device according to the present invention;

FIG. 3 is a perspective view showing one embodiment of a paper discharge unit of the stencil printing apparatus including the paper discharge guide device according to the present invention, in particular, a paper discharge table;

FIG. 4 is a side view showing an embodiment of the paper ejection guide device according to the present invention.

FIG. 5 is a front view showing an embodiment of a paper ejection guide device according to the present invention.

FIG. 6 is a plan view showing an embodiment of a paper ejection guide device according to the present invention.

[Explanation of symbols]

 REFERENCE SIGNS LIST 1 plate cylinder 3 press roller 5 sheet separation claw 7 sheet discharge feeding device 21 sheet discharge table 23 bottom plate 25 side plate 27 stopper plate 29 sheet discharge guide member 37 first sheet discharge guide bar 41 second sheet discharge guide bar 41

──────────────────────────────────────────────────続 き Continued on the front page (51) Int.Cl. ⁶ Identification number Agency reference number FI Technical display location B65H 31/34 B65H 31/34

Claims (1)

(57) [Scope of request for utility model registration] 1. A discharge guide member provided on both sides of a discharge entrance of a discharge table, wherein the discharge guide member has a discharge guide bar suspended from a base so that a lower end forms a free end. The discharge guide bar includes a plurality of discharge guide bars, and each of the discharge guide bars is inclined with respect to a vertical plane along the discharge direction so that the free lower end is located inside the discharge table relative to the upper side, and the inclination angle is the most. The paper ejection guide bar located at the paper ejection inlet portion is the largest, and the smaller the paper ejection guide bar is, the smaller the paper ejection guide bar is located in the paper ejection direction. A sheet discharge guide device.