JPS58183558A - Paper discharge device - Google Patents

Abstract

PURPOSE:To surely carry out the discharge of a soft paper onto a tray, by providing, coaxially with a paper discharge roller disposed at the paper discharge end of a paper discharge device, a paper push-out member having a resilient piece projecting from the outer periphery of the above-mentioned roller. CONSTITUTION:When an original 15 which is discharged from a paper discharge passage 1 through a pair of rollers 5, 6, enters into a space below a paper discharge roller 14, a resilient piece 27 which is projected diametrically of a rubber push-out member 25 coaxially with the discharge roller 24, is abuts against the original 15. Since this resilient member 27 is projected tangentially to the push- out member 25 of ring-like shape on the side opposite to the direction of rotation thereof, the resilient piece 27 is bent when its abuts against the original 15, and thereafter, repels the trailing end of the original 15 forward when the original 15 is discharged out by the discharge roller 24. With this arrangement, the original 15, even if it is thin and soft, is surely discharged onto the discharge tray 2.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a paper ejection device used in facsimiles, printers, copying machines, and the like.

For example, some facsimile transmitting apparatuses are configured to feed originals set on an original tray one by one, transport them to a reading section, and after reading the information, eject them onto an ejection tray.

FIG. 1 shows a document (paper) ejection device used in such a facsimile transmission device. The paper conveyance path 1 has a structure that extends from a document tray (not shown) to an ejection 1 to a tray 2 via a reading section (also not shown). The final stage of the paper transport path 1 is formed by an upper guide 3 and a lower guide 4. In front of both guides 3.4, there are provided a conveyance roller 5 and a pinch roller 6 which is in rolling contact with the conveyance roller 5. The driving force of the motor 7 is transmitted to the conveyance roller 5 via a pulley 8, a belt 9, and a pulley 10, and the conveyance roller 5 rotates in the direction of the arrow. A discharging roller 11 is provided above the lower guide 4 in a rear stage and facing the lower guide 4 . The discharge roller 11 receives the rotational force of the pinch roller 6, which is rotated in the direction of the arrow following the rotation of the conveyance roller 5, through the pulley 12, belt 13, and pulley 14, and rotates in the direction of the arrow. ing.

The original 15 sent out from the original tray and passed through the reading section enters between the transport roller 5 and the pinch roller 6, and is transported between the guides 3 and 4 by rotation of these rollers in the direction of the arrow. Thereafter, the original 15 enters below the ejection roller 11 and is ejected onto the ejection tray 2 by rotation in the direction of the arrow.

By the way, in such an apparatus, the document 15 comes into contact with various parts interposed in the paper conveyance path 1 while being conveyed, and is charged with static electricity. As a result, the rear end of the document 15 discharged by the discharge roller 11 may adhere to the rear end of the lower guide 4 or the outer peripheral surface of the discharge roller 11 as shown in FIG. 1, and may not be completely discharged. there were. When such a phenomenon occurs, the exit side of the ejection roller 11 is blocked, which obstructs the ejection of the next document to be conveyed, and paper jams may occur. Especially when the thickness of the original is 50μ
If the document is thin and has weak stiffness, such as less than m, the trailing edge of the document that is blocking the exit side of the ejection roller 11 cannot be pushed out to the ejection tray 2 by the leading edge of the next document to be conveyed. The above phenomenon was remarkable.

The present invention has been made in view of the above circumstances, and it is an object of the present invention to provide a paper ejecting device that can reliably eject paper even if it is thin.

In the present invention, a paper pushing member is provided which rotates together with the ejection roller and has an elastic piece protruding from the outer peripheral surface of the paper pushing member, and a cutout is provided in the lower guide for escape of the elastic piece. to achieve the above-mentioned purpose.

The present invention will be described in detail below with reference to Examples.

FIG. 2 shows, for example, a document (paper) ejection device in a facsimile transmission device, and FIG. 3 shows a perspective view of a portion thereof. In these figures, the same parts as in FIG. 1 are denoted by the same reference numerals, and their explanations will be omitted.

Both ends of the discharge roller shaft 21 are fixed to a frame (not shown). Two sets of discharge roller frame bodies 22 are rotatably provided on the shaft 21. The discharge roller structure 22 is constructed as shown in FIGS. 4 and 5. In other words, the discharge roller assembly 22 includes a sleeve 23 that is rotatably fitted onto the shaft 21, a discharge roller 24, a paper pushing member 25, and a pulley 26 that are respectively fitted to the outer periphery of the sleeve 23. ing.

The discharge roller 24 is made of sponge.

The paper pushing member 25 is made of rubber and has a diameter of 180'll1 at the outer periphery of a ring plate having a smaller diameter than the discharge row 524.
It is configured to have elastic pieces 27 at two locations between them.

The elastic piece 27 extends in the tangential direction of the ring plate in a direction opposite to the rotational direction, and protrudes from the outer peripheral surface of the discharge roller 24 as appropriate.

The pulley 26 plays the same role as the pulley 14 in FIG. 1, and the belt 13 is provided between it and the pulley 12 of the pinch roller 6.

The discharge tray 2, upper guide 3, and lower guide 4 are made of sheet metal. At one end of the discharge tray 2 and the rear end of the lower guide 4, a relief notch 28 is provided at a location corresponding to the paper pushing member 25 to prevent the elastic piece 27 from coming into contact with the paper pushing member 25 when the paper pushing member 25 rotates.
is provided. One end portion of a portion 4 of a paper upward movement prevention plate 29 made of a polyester film is attached to a rear end portion of the upper guide 3 at a location corresponding to the outside of both discharge roller structures 22. The paper upward movement prevention plate 29 is provided above the lower guide 4 at a distance and substantially parallel to the lower guide 4 .

Further, the tip thereof is located outward from the rotation locus of the tip of the elastic piece 27.

When the document 15 enters below the ejection roller 24, the leading end portion thereof is sent out toward the ejection tray 2 as the ejection roller 24 rotates in the direction of the arrow.

At this time, the elastic piece 27 protruding from the outer circumferential surface of the discharge roller 24 comes into contact with the document 15. However, since the elastic piece 27 protrudes in the tangential direction of the ring plate in the opposite direction to the rotational direction, it comes into contact with the original 115 and smoothly bends clockwise in FIG. 2 against its own elasticity. If the document 15 is thin and has weak stiffness, a part of the document 15 may be slightly bent into the relief notch 28 even if the elastic piece 27 is smoothly bent in the same direction. In this case, the original 15 is placed on the lower guide 4.
The discharge roller 24, which is pressed against the document 15 and sent out by contact friction force, is made of sponge.
It can be flexed smoothly without pulling.
No wrinkles will occur.

Therefore, even if the elastic piece 27 protrudes from the outer peripheral surface of the discharge roller 24, it will not interfere with the feeding of the document 15.

When the document 15 is sent out by the discharge roller 24,
It is assumed that the rear end portion is attached to the rear end portion of the lower guide 4 due to static electricity. In this case, the original is pushed out by the elastic piece 27 of the paper pushing member 25 that rotates integrally with the ejection roller 24.
The rear end of 5 is pushed out. At this time, if the rear end of the original 15 adheres to the outer peripheral surface of the ejection roller 24, the rear end of the original 8!15 moves upward following the rotation of this in the direction of the arrow. The movement prevention plate 29 prevents the object from falling naturally. Therefore, even if the original 15 is not easily stored, it can be reliably ejected onto the ejection tray 2.

In the above embodiment, the paper upward movement prevention plate 29 is connected to the lower guide 4.
Although they are provided spaced apart from each other, they may also be provided so as not to be in contact with each other, as shown in FIG. 6, for example. Further, as shown in the figure, a static elimination brush 31 may be provided at a predetermined location on the discharge tray 2, and the document may be brought into reliable contact with this by the paper upward movement prevention plate 29.

In this case, it is desirable that the paper upward movement prevention plate 29 be made of a polyester film with a thickness of about 0.2 mm so as not to interfere with ejection of the original.

Further, in the above embodiment, the paper pushing member 25 is provided with two elastic pieces 27, but the present invention is not limited to this, and for example, three elastic pieces 27 may be provided as shown in FIG.

Further, in the above embodiment, the paper upward movement prevention plate 29 is made of a polyester film, but is not limited to this, and may be made integrally with the upper guide 3 from, for example, a sheet metal.

As explained above, according to the present invention, since the trailing edge of the paper can be pushed by the elastic piece, even if the paper is thin and weakly strained, it can be ejected reliably, regardless of the type of paper. Therefore, reliable discharge is possible, and equipment management becomes easy.

[Brief explanation of the drawing]

FIG. 1 is a schematic side view showing an example of a conventional paper ejection device;
Fig. 2 shows a schematic side view of a paper 7-discharging device according to an embodiment of the present invention, Fig. 3 is a perspective view of a part thereof, Fig. 4 is a side view of its discharging roller structure, and Fig. 5 The figure is a vertical sectional view taken along the line ■-v in FIG. 4, FIG. 6 is a schematic side view of the main part showing another embodiment of the present invention, and FIG. 7 is a diagram showing another example of the discharge roller structure. FIG. 1... Paper transport path 2... Ejection tray 4... Lower guide 15... Document (paper) 22... Ejection roller configuration Body 24...Discharge roller 25...Paper extrusion member 27...Elastic piece 28...Escape notch Applicant Person Fuji Xerox Co., Ltd. Agent Person Patent Attorney Umeo Yamauchi 8- Figure 1 Figure 2 Figure 2 Figure 4 Volume 6 Figure 5 Figure 7

Claims (1)

[Claims] A paper lower guide forming the final stage of the paper conveyance path, a paper ejection roller rotatably provided above the paper lower guide in opposition to the paper lower guide, and a paper ejection roller provided to rotate integrally with the paper ejection roller. A paper ejecting device comprising: a paper pushing member having an elastic piece protruding from the outer circumferential surface of the paper ejecting device; and a notch for escaping the elastic piece provided at a location corresponding to the paper pushing member of the paper lower guide. .