JPH04365730A - Automatic paper feed mechanism - Google Patents

Abstract

PURPOSE:To contrive miniaturization and cost down of a paper feed mechanism total unit by automatically feeding two kinds of separated paper by a single paper feed driving roller. CONSTITUTION:A mechanism is constituted of a paper feed driving roller 6 selectively rotated in forward/reverse directions, pair of separating pieces 9, 10 held in contact with fixed pressing force respectively by springs 7, 8 in a location almost opposed to a surface of this driving roller 6, document paper supply part 12 for supplying document paper 11 to a contact location between the one separating piece 9 and the paper feed driving roller 6 and a recording paper supply part 14 for supplying recording paper 13 to a contact location between the other separating piece 10 and the paper feed driving roller 6.

Description

[Detailed description of the invention]

0001

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an automatic paper feeding mechanism that separates and feeds single sheets of paper such as originals and recording paper one by one using a separating piece.

0002

[Prior Art] This type of automatic paper feeding mechanism was developed in Japanese Patent Application Laid-open No. 6
The one shown in Japanese Patent No. 1-88941 is known. As shown in FIG. 5, a pair of separation pieces 3, 2 are provided on the surface of the paper feed drive roller 1, one after the other.
is brought into contact with the surface of the paper feed drive roller 1 with a pressing force F by an elastic member 4. Then, by driving the paper feed drive roller 1 to rotate in one direction, the single sheets stacked in the paper supply section are first separated by the separation piece 2, and then also separated by the separation piece 3, thereby ensuring that one sheet of paper is automatically fed. It's supposed to be paper.

0003

[Problems to be Solved by the Invention] However, since conventional automatic paper feeding mechanisms always automatically feed one type of single sheet paper, for example, in facsimile machines, two types of paper, document paper and recording paper, are used. In order to automatically feed paper, it is necessary to provide two automatic paper feeding mechanisms, which poses a problem of increasing the size of the entire paper feeding mechanism and increasing costs.

[0004] Therefore, the present invention provides an automatic paper feeding mechanism that can automatically feed two types of single-sheet paper using one paper feeding drive roller, thereby reducing the size and cost of the entire paper feeding mechanism. This is what I am trying to do.

[0005]

[Means for Solving the Problems] The present invention provides a paper feed drive roller that selectively rotates forward and reverse, and a roller that is held in contact with substantially opposing portions of the surface of the drive roller with a constant pressing force. Consisting of a pair of separation pieces and a pair of paper supply parts that supply single-sheet paper to the contact area between each separation piece and the paper feed drive roller, one paper feed part is supplied by forward rotation of the paper feed drive roller. One separation piece separates and sends out the single sheets of paper one by one with one separation piece, and by reverse rotation of the paper feed drive roller, the single sheets of paper from the other paper supply section are separated and sent out one by one with the other separation piece. .

[0006]

[Operation] In the present invention having such a structure, for example, if one paper supply section stores a single sheet of manuscript paper, and the other paper supply section stores a single sheet of recording paper, the paper feed drive can be performed. By the forward rotation of the roller, the original papers are separated one by one by one separation piece and sent out. Further, by reverse rotation of the paper feed drive roller, the recording paper is separated one by one by the other separation piece and sent out. In this way, two types of single-sheet paper, manuscript paper and recording paper, can be selectively and automatically fed.

[0007]

DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to the drawings. In this embodiment, the present invention is applied to a facsimile machine.

As shown in FIG. 1, a keyboard 2 is provided on the front surface of the housing 1 and is provided with various keys necessary for facsimile communication operations.
A liquid crystal display 3 for displaying the dialed number of the other party, messages, etc. is also provided. Further, a recording paper outlet 4 and a document paper outlet 5 are provided on the front surface of the housing 1. An automatic paper feeding mechanism A is provided at the rear upper part of the housing 1.

As shown in FIG. 2(a), the automatic paper feeding mechanism A includes a paper feeding drive roller 6 that selectively rotates forward and backward by a motor (not shown), and this drive roller 6.
A pair of separating pieces 9 and 10 are held in contact with each other with a constant pressing force by springs 7 and 8 at substantially opposing positions on the surfaces of A manuscript paper supply section 12 that supplies a manuscript paper 11 that is a single sheet, and a recording paper supply section 14 that supplies a recording paper 13 that is a single sheet of paper to the contact area between the other separation piece 10 and the paper feed drive roller 6. It is configured.

The automatic paper feeding mechanism A feeds the original paper 11 from the original paper supply section 12 when the paper feed drive roller 6 rotates forward, for example, rotates clockwise in the figure as shown in FIG. 2(c).
are separated one by one by an appropriate pressing force of one of the separation pieces 9 against the paper feed drive roller 6 and sent to the document paper conveyance path 15, and the paper feed drive roller 6 rotates in the reverse direction, for example, as shown in FIG. 2(b). As shown in FIG.
1 due to the appropriate pressing force on the paper feed drive roller 6.
The sheets are separated one by one and sent to a recording paper transport path 16.

The original paper 11 sent out to the original paper transport path 15 is supplied to a white roller 17, and by the rotation of this white roller 17, the original paper 11 is delivered to the original paper discharge port 5.

A line light source 18 and a CCD line sensor 19 are arranged in a line along the axial direction of the roller 17 at a position facing the white roller 17, and the document paper 11 is moved over the white roller 17. When passing, the original paper 11 is read by the CCD line sensor 19 and processed as facsimile transmission information.

The recording paper 13 sent out to the recording paper transport path 16 is supplied to a platen 21 via a feed roller 20 midway through, and is sent out to the recording paper discharge port 4 by rotation of the platen 21. .

A thermal line head 22 is provided at a position facing the platen 21 along the axial direction of the platen 21, and information received by the thermal line head 22 when the recording paper 13 passes over the platen 21 is provided. is printed and recorded.

In the embodiment having such a configuration, when transmitting information on the original paper 11 by facsimile, the paper feed drive roller 6 is rotated clockwise in the figure as shown in FIG. 2(c). As a result, the original paper 1 is transferred from the original paper supply unit 12 to the original paper 1.
1 is separated one by one by one of the separation pieces 9 and sent to the original paper conveyance path 15. Then, the original paper 11 is conveyed through the original paper transport path 15, passes over the white roller 17, and is sent out to the original paper discharge port 5. At this time, information is read from the document paper 11 by the CCD line sensor 19 on the white roller 17 and processed as facsimile transmission information. The information read from the manuscript paper 11 in this manner is transmitted by facsimile.

Further, when receiving information sent by facsimile from the other party, the paper feed drive roller 6 is moved as shown in FIG. 2(b).
Rotate to the left as shown in the figure. As a result, the recording paper 13 is separated one by one by the other separation piece 10 from the recording paper supply section 14 and sent out to the recording paper transport path 16. Then, the recording paper 13 is supplied to a platen 21 via a feed roller 20 midway, and is sent out to the recording paper discharge port 4 by rotation of the platen 21. At this time, the information received by the thermal line head 22 is printed and recorded on the platen 21.

By rotating one paper feed drive roller 6 to the right (forward rotation) and to the left (reverse rotation) in this way,
The pair of separation pieces 9 and 10 selectively separate the original paper 11 from the original paper supply section 12 and the recording paper 13 from the recording paper supply section 14 one by one and automatically feed them. Therefore, it is not necessary to use two paper feeding mechanisms, one for original paper and one for recording paper, and the entire paper feeding mechanism can be made smaller and lower in cost. Next, other embodiments of the present invention will be described with reference to the drawings. Note that the same parts as in the above embodiment are given the same reference numerals and detailed explanations will be omitted. As shown in Figure 3, this is an automatic paper feed mechanism B exclusively for manuscript paper located at the rear upper part of the housing 1.
And an automatic paper feeding mechanism C exclusively for recording paper is provided.

The automatic paper feed mechanism B includes a paper feed drive roller 23 that rotates only to the right in the figure by a motor (not shown);
A separation piece 25 is held in contact with the surface of the drive roller 23 by a spring 24 with a constant pressing force, and a document paper 11 is placed in the contact area between the separation piece 25 and the paper feed drive roller 23.
It is comprised of a document paper supply section 26 that supplies paper.

As shown in FIG. 4(a), the automatic paper feeding mechanism C includes a paper feeding drive roller 27 which is selectively rotated forward and backward by a motor (not shown), and a surface of this drive roller 27. Spring 28, 29 is installed at substantially opposite parts of the
A pair of separation pieces 3 held in contact with a constant pressing force by
0, 31, a first recording paper supply unit 33 that supplies a first recording paper, for example, A4 size recording paper 32, to the contact area between one separation piece 30 and the paper feed drive roller 27; It is comprised of a second recording paper supply section 35 that supplies a second recording paper, for example, B4 size recording paper 34, to the contact area between the separation piece 31 and the paper feed drive roller 27.

When the paper feed drive roller 23 rotates, the automatic paper feed mechanism B separates the original paper 11 from the document paper supply unit 26 one by one by the appropriate pressing force of the separation piece 27 against the paper feed drive roller 23. Then, the document is sent out to a document paper conveyance path 15. The original paper 11 sent out to the original paper transport path 15 is supplied to a white roller 17, and by the rotation of this white roller 17, the original paper 11 is sent to the original paper discharge port 5.

[0021] The automatic paper feeding mechanism C feeds A4 from the first recording paper supply section 33 when the paper feed driving roller 27 rotates forward, that is, rotates to the right in the figure as shown in FIG. 4(c).
The recording paper 32 of the same size is separated one by one by an appropriate pressing force of one separation piece 30 against the paper feed drive roller 27 and sent to the recording paper conveyance path 16, and the paper feed drive roller 27 rotates in the reverse direction, that is, as shown in FIG. As shown in 4-(b), when turning to the left in the figure, the paper is transferred from the second recording paper supply section 35 to B4.
The recording paper sheets 34 of different sizes are separated one by one by the appropriate pressing force of the other separation piece 31 against the paper feed drive roller 27, and sent to the same recording paper transport path 16. The recording paper 32 or 34 sent out to the recording paper transport path 16 is supplied to a platen 21 via a feed roller 20 midway, and is sent out to the recording paper ejection port 4 by rotation of the platen 21.

[0022] In this embodiment with such a configuration, the A4
By rotating one paper feed drive roller 27 clockwise (forward rotation) and counterclockwise rotation (reverse rotation), two types of recording paper 32 and 34, ie, B4 size and B4 size, are separated by a pair of separation pieces 30 and 31.
Paper can be separated and selectively fed automatically. Therefore, it is not necessary to use two paper feeding mechanisms for A4 size and B4 size, and the overall size and cost of the paper feeding mechanism can be reduced.

[0023]Although the above embodiments have been described in which the present invention is applied to a facsimile machine, the present invention is not necessarily limited to this, and can also be applied to automatic paper feeding mechanisms such as printers and copying machines. .

[0024]

[Effects of the Invention] As detailed above, according to the present invention, 1
It is possible to provide an automatic paper feeding mechanism that can automatically feed two types of single-sheet paper using one paper feeding drive roller, and can reduce the size and cost of the entire paper feeding mechanism.

[Brief explanation of the drawing]

FIG. 1 is a schematic configuration diagram of main parts showing an embodiment of the present invention.

FIG. 2 is a diagram for explaining the operation of main parts in the same embodiment.

FIG. 3 is a schematic configuration diagram of main parts showing another embodiment of the present invention.

FIG. 4 is a diagram for explaining the operation of main parts in the same embodiment.

FIG. 5 is a diagram showing a conventional example.

[Explanation of symbols]

6, 27... Paper feed drive roller, 9, 10, 30, 31...
Separation piece, 11... Manuscript paper, 12... Manuscript paper supply section, 13
, 32, 34... Recording paper, 14, 33, 35... Recording paper supply unit.

Claims (1)

[Claims] 1. A paper feed drive roller that selectively rotates forward and backward; a pair of separation pieces each held in contact with substantially opposing portions of the surface of the drive roller with a constant pressing force; It consists of a pair of paper supply sections that supply single-sheet paper to the contact area between the separation piece and the paper feed drive roller, and the single-sheet paper from one paper supply section is transferred to one side by forward rotation of the paper feed drive roller. The automatic paper feeder is characterized in that a separation piece separates and sends out one sheet at a time, and by reverse rotation of the paper feed drive roller, single-sheet paper from the other paper supply section is separated and sent out one by one with the other separation piece. mechanism.