JPH04342267A - Paper feeder - Google Patents

Abstract

PURPOSE:To smoothly feed a document placed on a tray. CONSTITUTION:A tray 30 on which a document 10 is placed can be so inclined that its side in the paper feed direction is lower. The tray 30 is set to the horizontal state or is inclined at a proper angle by the turning operation of a cam 41. The document on the tray 30 is smoothly fed by rotation of a paper feed roll 51 when its leading edge is brought into contact with the roll 51.

Description

[Detailed description of the invention]

0001

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a paper feeding device used for feeding documents in facsimiles, copying machines, and the like.

0002

[Prior Art] In a facsimile paper feeding device, multiple documents to be sent are stacked on a tray, and are sent in order from the bottom by rotating a paper feeding roller disposed along the front edge of the tray. The original is ready to be sent. The tray is normally inclined at a certain angle so that the front portion, which is the feeding direction, faces downward so that each document to be sent is smoothly fed forward.

0003

[Problems to be Solved by the Invention] In such a paper feeding device, when a large number of originals are stacked on the tray, even if the tray is tilted, the originals located on the lower side are A large load is applied, increasing the friction between the documents. Therefore, stacked originals cannot be easily separated from each other, which may cause problems such as double feeding in which the two documents are fed together and a delay in paper feeding. Similarly, when the originals are large, the friction between the originals in contact with each other increases, resulting in problems such as double feeding and paper feeding delays even when many sheets are not stacked. There is a risk of In order to solve this problem, if the inclination angle of the tray is increased, double feeding may occur frequently during normal paper feeding in which the friction between documents that come into contact with each other is relatively small.

The present invention solves the above conventional problems, and its purpose is to provide a paper feeding device that can smoothly feed paper in accordance with the number and size of originals to be fed. be.

[0005]

[Means for Solving the Problems] A paper feeding device of the present invention is arranged so as to be tiltable so that the paper feeding direction side of the original is on the lower side, and includes a tray on which the original is placed, and a tray on which the original is placed. a means for changing the inclination angle of the tray; a document feeding means disposed on the paper feeding direction side of the tray and conveying the document in a predetermined direction by contacting the document placed on the tray; The above object is thereby achieved.

[0006]

[Operation] In the paper feeding device of the present invention, by changing the inclination angle of the tray, the force acting on the documents placed on the tray in the paper feeding direction due to their own weight increases, and the documents come into contact with each other. Since the frictional force between the documents is reduced, the documents are smoothly fed one after another from the tray. The inclination angle of the tray is changed as appropriate depending on the document to be placed.

[0007]

[Examples] The present invention will be explained below with reference to Examples.

The paper feeding device of the present invention, as shown in FIG.
It is used for feeding the document 10 in facsimile. The paper feeding device feeds a tray 30 horizontally attached to the facsimile case 20 so as to cover the upper surface thereof, and a document 10 placed on the tray 30 forward (indicated by arrow Y). The case 20 in front of the tray 30
It has a document feeding means 50 disposed inside.

[0009] The tray 30 placed in the paper feeding device is arranged so that its rear edge can rotate in the vertical direction, for example, as shown in FIG. 2(A).
As shown in FIG.
It is supported by 0. Each bracket 31 is provided with a long hole 31a extending in the vertical direction, and the pin 32 can slide within each long hole 31a.

[0010] An oblong cam 41 for supporting the tray 30 is provided below the central portion of the tray 30 in the front-rear direction. The cam 41 is supported by a support shaft 41a extending in the horizontal direction, and rotates around the support shaft 41a. The support shaft 41a is supported within the case 20. When the long axis direction of the cam 41 is equal to the horizontal direction, the tray 30 is placed in a horizontal state without tilting forward, and when the long axis direction is equal to the vertical direction, the tray 30 is moved to a predetermined maximum position. Lean forward at the forward angle. The support shaft 41 extends laterally from the side surface of the case 20, and an operating handle (not shown) is attached to the extended portion. By rotating the operating handle, the cam 41 is rotated to a predetermined inclined state.

The document feeding means 50 disposed in front of the tray 30 has a paper feeding roller 51 disposed along the front edge of the tray 30 . The paper feed roller 51 is arranged at approximately the same level as the tray 30 in a horizontal state, and a friction pad 52 is pressed upwardly on the front portion of the paper feed roller 51 on the tray 30 side. The originals 10 placed on the tray 30 are fed one by one from the bottom by the rotation of the paper feed roller 51 and the pressing action of the friction pad 52. The document 10 fed forward by the paper feed roller 51 is further fed forward by a pair of feed rollers 53 and 53.
The images of the document 10 are sequentially read by the CCD 60 and transferred to the case 20 by a pair of ejection rollers 54 and 54.
Expelled outside.

Inside the case 20, there is a recording paper roll 63 in which a recording paper 62 is wound into a roll in order to record the received image, and an image is printed on the recording paper 62 pulled out from the recording paper roll 63. A print head 64 and the like are provided.

As shown in FIG. 2(A), the paper feeding device of the present invention having such a configuration usually has the cam 41 with its long axis in the horizontal direction, and tilts the tray 30. It is assumed to be in a horizontal state. In this state, tray 30
For example, an appropriate number of normal-sized originals 10 are placed thereon, with the front edge of each original 10 in contact with the friction pad 52 of the original feeding means 50. In this state, when the facsimile is operated and the paper feed roller 51 is rotated, the documents 10 on the tray 30 are sequentially moved forward from the bottom document 10 by the rotational force of the paper feed roller 51. sent to. Images of the document 10 sent out by the paper feed roller 51 are sequentially read by the CCD 60 .

If the tray 30 in the paper feeding device is in a horizontal state, there is a risk that the originals 10 may not be fed out smoothly, for example, when setting many originals 10 on the tray 30 at once, operate the operating handle. Thus, the long axis direction of the cam 41 is made to be vertical, or the long axis direction is made to be in an appropriate state between a horizontal state and a vertical state. As a result, the tray 30 is tilted forward by a predetermined angle, as shown in FIG. 2(B). As a result, the many sheets of originals 10 stacked on the tray 30 are subjected to a forward force indicated by Y due to their own weight, and the load acting on the lower originals 10 is reduced, so that they come into contact with each other. The friction between the originals 10 is reduced, and the lower original of both originals can be easily separated from the upper original. Therefore, when the paper feed roll 51 is rotated in this state, the rotational force of the paper feed roller 51 allows the document to be smoothly fed out starting from the lowest document.

Even when large-sized originals 10 are set on the tray 30, by tilting the tray 30 at an appropriate forward angle, a forward force indicated by Y is generated, and the originals 10 that come into contact with each other are generated. Since the frictional force between the documents is reduced, each document is sent out smoothly without paper feeding delays or double feeding.

In the above embodiment, the tray 30 is connected to the cam 4.
Although the configuration is such that the horizontal state can be switched steplessly from a suitable forward tilted state by the rotational operation of step 1, the present invention is not limited to such a configuration. For example, as shown in FIG. 3, by sliding the cam 41 in the front-back direction,
The inclination angle of the tray 30 may be changed precisely.

[0017]

Effects of the Invention In this way, the paper feeding device of the present invention applies force in the paper feeding direction (forward) depending on the document on the tray by changing the forward tilt angle of the tray. Since the frictional force between the overlapping originals is reduced, the originals can be fed smoothly regardless of the number or size of the originals.

[Brief explanation of drawings]

FIG. 1 is a longitudinal sectional side view of a facsimile machine using a paper feeding device of the present invention.

FIG. 2(A) is an enlarged side view of the main parts of the paper feeding device. (B) is an explanatory diagram of the operation.

[Explanation of symbols]

10 Manuscript 30 Tray 41 Cam 50 Original feeding means 51 Paper feed roll

Claims (1)

[Claims] 1. A tray arranged so as to be tiltable so that the paper feeding direction side of the original is on the lower side, and on which the original is placed, means for changing the inclination angle of the tray, and the tray. A paper feeding device comprising: a document feeding unit disposed on the paper feeding direction side of the tray for contacting a document placed on the tray and conveying the document in a predetermined direction.