JPH068139Y2 - Paper storage device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION (a) Field of Industrial Application The present invention relates to a paper storage device that can be used in a device such as a double-sided copying machine, and particularly, for a paper that is recorded (copied) on one side. The sheet is temporarily stored before re-recording (re-copying) on the other side.

(B) Conventional Technology FIG. 2 shows the configuration of the main part of a conventional paper storage device. In this figure, (1) is an apparatus main body on which a recording device such as a copying machine is placed.

(2) is an introduction path for introducing the paper (3) copied on one surface from the direction of arrow A, and is provided with guides (4) and (5) at the top and bottom. A semicircular curved reversal guide (6) is provided near the downstream end of the introduction passage (2), and inside the reversion guide (6), the radius of curvature of the reversal guide (6) is slightly larger than that of the reversal guide (6). A small radius reversing roller (7) is rotatably mounted. Therefore, by the reversing guide (6) and the reversing roller (7), the vicinity of the sheet discharge portion of the introduction path (2) is curved and the sheet (3) passing therethrough is reversed.

(8) and (9) are auxiliary rollers pressed against the reversing roller (7).

Below the introduction passage (2), there is provided a swing lever (11) whose base end is swingably mounted on the frame (10) of the apparatus body (1). The swing lever (11) A paper feed roller (12) connected to a rotary drive source is rotatably attached to the free end of the.

In the swing lever (11), the paper feed roller (12) is connected to the introduction passage.
The first position near the paper discharge port (13) of (2) and the second position where the paper feed roller (12) is pressed against the intermediate tray (14) described later.
The position and the position can be selected in a moderate manner.

The intermediate tray (14) temporarily holds the paper (3) recorded on one side, and the paper (2) whose front and back are reversed at the downstream end of the introduction passage (2). , Is fed from the paper discharge port (13) in the direction of arrow C and placed.

Then, in order to re-feed the sheet (3) placed on the intermediate tray (14), the swing lever (11) is biased clockwise from the state shown in FIG. The roller (12) is pressed against the upper surface of the paper (3).

When the paper feed roller (12) is rotated counterclockwise while being pressed against the paper (12), the paper (3) is fed in the direction of the arrow D, and the first paper feed roller pair (15) (16) ) And the second pair of paper feed rollers (17) and (18), and is re-fed toward the copying machine.

A problem in this conventional apparatus is that the paper feed roller (12) is stopped when the paper (3) is discharged from the introduction passage (2) onto the intermediate tray (14).

When the paper feed roller (12) is not in pressure contact with the paper (3) (when it is not operating), lift the paper feed roller (12) as high as possible and use the paper discharge port of the introduction path (2). Paper placed above (13) and ejected from the paper outlet (13)
It is preferably configured so as not to inhibit the progress of (3).

However, for that purpose, the paper feed roller (12) needs to be lifted sufficiently upward, which causes a problem that the apparatus main body (1) becomes large. Since the copying machine is placed on the upper part of the device body (1), the enlargement of the device body (1) leads to a serious drawback.

Therefore, as described above, even when the paper feed roller is not operating,
(12) is not lifted so much, and the paper outlet of the introduction passage (2)
Although it is located near (13), the paper feed roller (12)
When the paper (3) is discharged from the introduction path (2), the downstream edge of the paper (3) is caught by the paper feed roller (12) when the paper (3) is stopped. Many wrinkles occur in (3), which causes paper jams.

The paper feed roller (12) is generally formed of a soft rubber so as not to slip with the paper (3) when the paper is fed. Since the paper is formed, the paper jam is very likely to occur.

(C) Problem to be solved by the invention As described above, in the conventional technology, when the paper (3) is discharged from the paper discharge port (13) of the introduction path (2), the paper feed roller (12) is Since it was stopped, it was easy for paper jams to occur.

The present invention has been made in view of the drawbacks of the conventional technique. Paper (3) is transferred from the paper discharge port (13) to the intermediate tray.
When ejected toward (14), the paper feed roller (12) is rotated in the same direction, and even if the downstream side edge of the paper (3) comes into contact with the paper feed roller (12), it is caught. It is a thing that escapes downward without any effort.

(D) Means for Solving the Problems The present invention is provided for a sheet introduction passage for introducing a sheet recorded on one side surface and a downstream end portion of the sheet introduction passage for reversing the sheet. A reverse roller, an intermediate tray for temporarily storing the reversed paper, and a paper feed roller for re-feeding the paper placed on the intermediate tray. It is configured to selectively take a first position in the vicinity of the paper discharge port of the paper introduction passage and a second position where the paper is pressed against the paper on the intermediate tray, and the paper is introduced from the paper introduction passage. When it comes, the paper feed roller rotates in the paper introduction direction at the first position, and when re-feeding the paper placed on the intermediate tray, the paper feed roller is It is characterized in that it is in the second position and rotates in the paper feeding direction. Paper storage device.

(E) Operation In the present invention, when the paper is introduced from the paper introduction passage, the paper feed roller is in the first position, rotates in the paper introduction direction, and is placed on the intermediate tray. When re-feeding the existing paper, the paper feed roller is in the second position and rotates in the paper feeding direction, so when the paper is introduced (when it is discharged when viewed from the introduction passage side), Even if the downstream edge of the paper comes into contact with the paper feed roller, it escapes in the introducing direction (downward),
No paper jams occur.

(E) Embodiment FIG. 1 and FIG. 3 are both configuration diagrams of an embodiment of the present invention. FIG. 1 shows a state in which the paper feed roller (12) is located above the third embodiment. The figure shows the state of re-feeding the paper (3) on the intermediate tray (14).

Each component has the same configuration as the conventional example, and only the rotation state of the paper feed roller (12) is different from the conventional example. Therefore, these figures correspond to FIG. The reference numerals are given and the description of each component is omitted.

In FIG. 1, the paper (3) is inserted into the paper outlet (1) of the introduction passage (2).
When ejected from 3), the paper feed roller 12 rotates in the clockwise direction (paper introduction direction). Therefore, the downstream edge of the sheet (3) escapes downward and is placed on the intermediate tray (14) as it is.

Then, the paper (3) placed on the intermediate tray (14)
When re-feeding the sheet to the copying machine,
The sheet feeding roller (12) is pressed against the sheet (3) on the upper side again by biasing the sheet feeding roller (12) in the clockwise direction. In such a state, the paper feed roller (12)
When the paper rotates counterclockwise (paper feed direction), the paper
(3) is re-fed to the copying machine.

(G) Effect of the Invention According to the present invention, when the paper is introduced from the paper introduction passage, the paper feed roller is in the first position and rotates in the paper introduction direction. Even if the downstream edge of the paper comes into contact with the paper feed roller during introduction into the tray,
There is no escape paper jam in the introduction direction (downward).

Therefore, paper jam does not occur even if the paper feed roller is not lifted more than necessary when it is stationary, and a compact and highly reliable storage device can be realized.

[Brief description of drawings]

FIG. 1 is a schematic view of the essential parts of an embodiment of the present invention, FIG. 2 is a schematic view of the essential parts of a conventional apparatus, and FIG. 3 is an embodiment of the present invention.
It is a principal part block diagram which shows the aspect different from FIG. (1) ... Device main body, (2) ... Introductory passage, (3) ... Paper, (6) ... Reversing guide, (7) ... Reversing roller, (11) ... Swing lever, (12) ...
Paper feed roller, (13) ... Paper outlet, (14) ... Intermediate tray.

Continuation of the front page (56) References JP-A-59-218464 (JP, A) JP-A-62-83937 (JP, A) JP-B 60-44655 (JP, B2)

Claims (1)

[Scope of utility model registration request] 1. A sheet storage device for temporarily storing the sheet recorded on one side before re-recording on the other side, wherein the sheet recorded on the one side is introduced. And a sheet introduction passage to be provided and provided near the downstream end of the sheet introduction passage,
A reversing roller for reversing the sheet, an intermediate tray for temporarily storing the reversed sheet, and a sheet feeding roller for re-feeding the sheet placed on the intermediate tray, The paper feed roller is configured to selectively take a first position near the paper discharge port of the paper introduction passage and a second position where the paper is pressed against the intermediate tray. When a sheet is introduced from the sheet feeding roller, the sheet feeding roller is rotated in the sheet introduction direction at the first position, and when the sheet placed on the intermediate tray is re-fed, The paper storage device, wherein the paper feeding roller is in the second position and rotates in the paper feeding direction.