JPH0571508B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION Field of the Invention The present invention relates to an ejection device for ejecting paper such as a document or a recording paper in a facsimile machine, a copying machine, or the like.

Prior Art As shown in FIGS. 2 and 3, a conventional device of this type includes a discharge roller 2 and a pinch roller 3 arranged above and below across a discharge path for the paper 1 to be discharged.
, an auxiliary ejection roller 4 arranged on the same axis as the ejection roller 2 and having a larger diameter than the ejection roller, and a tray 5 for receiving ejected paper. It was sandwiched between pinch rollers 3 and discharged onto tray 5. Here, the auxiliary ejection roller 4 is provided to prevent the paper 1 that has exited the ejection roller 2 and the pinch roller 3 from stopping at that position, and to reliably send the paper 1 onto the tray 5. Further, the discharge roller 2 is normally driven in the direction of the arrow by a drive device (not shown).
The pinch roller 3 is structured to rotate in the direction of the arrow. In addition, in the figure, 6 is a housing.

Problems to be Solved by the Invention However, with this configuration, when the paper is ejected, if the leading edge comes into contact with the paper that has already been piled up, the friction may cause the paper to not be ejected properly.

The present invention was made in view of the above-mentioned problems, and
It is an object of the present invention to provide a discharge device that can reliably discharge sheet members.

Means for Solving the Problems The present invention has been made in order to solve the above-mentioned problems, and the present invention has been made in order to solve the above-mentioned problems. A flexible wing-like member is provided that contacts the guide member, and a convex portion is provided on the back side of the tip of the wing-like member that contacts the guide member.

Effects With the above-described configuration, the present invention can strengthen the conveying force because the tip portion of the wing-like member contacts the sheet member over a wider area, and the centrifugal force from the convex portion can force the sheet to be applied with a stronger force. The paper can be ejected reliably by hitting it with the paper.

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

FIGS. 1a, b, and 1c are schematic cross-sectional views illustrating the operation of a discharge device according to an embodiment of the present invention. In the figure, 11 is a sheet, 12 is a guide forming a paper ejection path, 13 is an ejection roller disposed below the ejection path, 14 is an ejection roller shaft that holds the ejection roller 13 fixedly, and 15 is an ejection roller. A pinch roller is arranged above the roller 13 and pressed against the discharge roller 13, 16 is a pinch roller shaft, 17 is a tray on which the discharged paper is deposited, and 18 is a housing. Usually, the ejection roller shaft 14 is connected to a drive device (not shown) and is configured to rotate the ejection roller 13 in the direction of arrow A. On the other hand, the pinch roller 15 is rotatable, and is configured to rotate the ejection roller 13 in the direction of arrow A. Therefore, it is configured to be rotated in the direction of arrow B.
Note that the pinch roller 15 is driven and the discharge roller 1
3 may be configured to rotate along with the pinch roller 15.

Reference numeral 20 denotes an auxiliary ejection roller that is fixed to the ejection roller shaft 14 and rotates together with the ejection roller shaft 14. The auxiliary discharge roller 20 has flexible blades 20a made of rubber or the like. This blade 20a
The length is determined so that the tip extends outside the outer diameter of the discharge roller 13 and can come into contact with the upper surface of the tray 17 as shown in b and c.

The operation of the discharge device having the above configuration will be explained below.

In FIG. 1a, the paper 11 to be ejected is pinched between the ejection roller 13 and the pinch roller 15, and the rotation of both rollers 13 and 15 causes the paper 11 to be delivered to the tray 1.
The trailing edge of the paper falls onto the tray 17 as shown by arrow C. During this paper ejection, the ejection roller 13 and the pinch roller 15
Since no driving force is applied to the paper that has passed between the and It may happen. However, since the blade 20a is rotating in the direction of arrow A, it hits the rear end of the paper 11a and sends it onto the tray 17. In this way, the paper is reliably fed onto the tray 17. Furthermore, this blade 20a is attached to the tray 1.
While touching the paper 11 that has fallen on 7, arrow D
move in the direction. As a result, the paper 11 is pulled in the direction of arrow D, and as shown in FIG.
They are aligned against the wall of the casing 18. Therefore, the paper 11 ejected from the ejection roller 13
Even if the paper is ejected onto the tray 17 in a distorted manner,
It is immediately aligned and will not be knocked off the tray by subsequent sheets. In this way, the sheets discharged from the discharge roller are aligned and stacked on the tray.

Note that in order to pull the paper 11 on the tray 17 in the direction of arrow D using the blade 20a, the blade 20a
It is desirable that the blades 20a come into strong contact with the paper 11, and therefore, in the illustrated embodiment, the tips of the blades 20a are made thicker to make them heavier so that a large centrifugal force acts on them. This centrifugal force also acts when paper is ejected, generating a stronger ejection force. Further, in the above embodiment, the auxiliary discharge roller 20 is fixed to the discharge roller shaft 14, and the discharge roller 1
Although the auxiliary ejection roller 20 is configured to rotate at the same speed as the ejection roller 13, the auxiliary ejection roller 20 does not necessarily need to rotate at the same speed as the ejection roller 13. It may be configured to be driven by a device, or it may be configured to be connected to the discharge roller shaft 14 via a torque limiter and rotated at a slower speed than the discharge roller 13.

Effects of the Invention As is clear from the above description, the present invention provides a guide member provided above the eject roller on the axis of the eject roller. In addition to providing a wing-shaped member, a convex portion is provided on the back side of the tip of the wing-shaped member that contacts the guide member, so that the tip of the wing-shaped member can contact the paper over a wider area, making it easier to convey the paper. Not only can the force be increased, but also the centrifugal force from the convex portions can strike the paper with a stronger force and send it out, making it possible to reliably eject the paper.

[Brief explanation of the drawing]

FIGS. 1a, b, and c are sectional views illustrating the operation of a discharge device according to an embodiment of the present invention, FIG. 2 is a sectional view of a conventional discharge device, and FIG. 3 is a perspective view thereof. 11...paper, 12...guide, 13...discharge roller, 14...discharge roller shaft, 15...pinch roller, 16...pinch roller shaft, 17...tray, 18...casing, 20... Auxiliary discharge roller, 2
0a...feather.

Claims (1)

[Claims] 1. A discharge roller located below the sheet member discharge path to convey the sheet member, a pinch member that comes into contact with the discharge roller, a guide member provided above the discharge roller, and a guide member provided on the discharge roller and the discharge roller. A flexible vane-like member whose distal end bends as the roller rotates and abuts the guide member, and has a convex portion on the back side of the contact surface of the distal end that abuts the guide member. Device.