JPS6011859Y2 - automatic paper feeder - Google Patents

Description

[Detailed description of the invention] This invention prevents the loaded paper from bending when automatically and continuously feeding originals into a facsimile transmission device, and smoothly separates and sends the sheets one by one. The present invention also relates to an automatic paper feeding device that allows accurate paper feeding.

2. Description of the Related Art Conventionally, a device for automatically and continuously supplying paper to a facsimile transmitting device or the like generally has a configuration as shown in FIG.

That is, the press roller 2 is brought into pressure contact with the paper feed belt 1 which is rotationally moved in the paper feed direction shown by the arrow by the urging force of the spring 3, and the paper 4 is transferred in the paper feed direction by the paper feed belt 1 and the press roller 2. At the same time, the brake piece 8 on the lower surface of the paper separation plate 7, which is fixed to the rotating body 5 which is rotatably provided and whose tip is brought into contact with the paper feed belt 1 by the spring 6, and the tip fixed to the rotating body 5 are adjusted. A paper feed auxiliary plate 10 is brought into contact with the paper feed belt 1 with a predetermined pressure by a screw 9, and the sheets of paper 4 are separated one by one from the bottom and fed out.

However, in an apparatus having such a configuration, if the thickness of the paper fed last is thin, the following problem occurs.

That is, as shown in FIG. 1, the starting edge of the last paper 4' reaches the brake piece 9 before the previous paper 4'' leaves the brake piece 8 of the paper separation plate 7, and the brake is applied to this paper 4'. However, since the trailing edge of this paper is still fed in the paper feeding direction by the paper feed belt 1 and the pressure roller 2, if the thickness of the last paper 4' is thin, this paper 4 ′
As shown in the figure, the paper may bend and wrinkle, or cause paper jams, making it difficult to feed the paper.

The present invention takes into account the above-mentioned drawbacks of the conventional methods, and makes it possible to smoothly and reliably separate sheets of paper one by one, regardless of the thickness of the paper being set.
This embodiment will be explained in detail with reference to FIG. 2 and the following drawings showing one embodiment thereof.

In those figures, 11 is a chassis with a square hole 11' bored in the bottom and a protrusion 11'' formed in a part, 12 is a drive motor provided near the side of the chassis 11, and 13 is a drive motor 12. 14 is a small diameter pulley fixed to the end of the motor shaft 13; 15 is a drive shaft rotatably provided on the chassis 11; 16 is a large diameter pulley fixed to the end of the drive shaft 15; 17 is a belt wound around a small-diameter pulley 14 and a large-diameter pulley 16, and 18 is a pair of drive rollers located in the square hole 11' of the chassis 11 and fixed to the drive shaft 15;
9 is a driven shaft located parallel to the drive shaft 15 and rotatably provided on the chassis 11; 20 is a drive roller;
A pair of driven rollers 18 are fixed to a driven shaft 19 facing each other, and 21 are two paper feed belts that are wound around the drive roller 18 and the driven roller 20, respectively, and are stretched and rotated in the paper feed direction. , 22 is a pressing shaft located above and parallel to the driven shaft 19 and rotatably provided on the chassis 11, and 23 is a pressing shaft of each shaft 2.
2 is a press roller rotatably attached to both paper feed belts 21, 24 is a press lever whose base is fixed to one end of the shaft 22 led out to the outside of the chassis 11, and 25 is a press lever. A locking pin located near 24 and implanted on the outer side surface of the chassis 11; 26 is a spring provided between the tip of the pressing lever 24 and the locking pin 25; The pressure lever 24 is biased clockwise so that the pressure roller 23 comes into pressure contact with the paper feed belt 21.

27 is a plurality of sheets of paper to be supplied such as facsimile manuscripts, 2
Reference numeral 8 denotes a first fixed shaft installed across both side plates of the chassis 11, 29 a rotating body rotatably supported by the first fixed shaft 28, and 30 each having a tip end connected to each paper feed belt 2.
1, four paper separation plates having elasticity are screwed onto the rotating body 29 so as to make contact with the rotating body 29, and 31 is a brake piece fixed to the lower surface of each paper separating plate 30, which is attached to the rotating body 29 so as to be swingable. In cooperation with the two auxiliary paper feed plates 32, the paper 27 is separated and sent out one by one from the bottom.

33 is a spring that urges the rotating body 29 clockwise so that the paper separation plate 31 comes into pressure contact with the paper feed belt 21; 34 is a second spring provided on the chassis 11 in parallel with the first fixed shaft 2B;
The fixed shaft 35 is an adjustment screw attached to the shaft 34, and the auxiliary paper feed plate 32 is pressed so that the tip of the auxiliary paper feed plate 32 lightly contacts the paper feed belt 21 on the front side of the paper separation plate 30. Then, the transferred paper 27 is pressed against the paper feed belt 21 to send out the paper 27.

36 is located between the pressing rollers 23 and the pressing shaft 22
This is a paper regulating plate which is swingably mounted on the chassis 11, and when the paper 27 is not being fed, it rotates clockwise due to its own weight and comes into contact with the protrusion 11' of the chassis 11.

This paper regulating plate 36 is configured such that its tip comes into contact with the second fixed shaft 34 when it moves upward by a predetermined amount, and further upward movement of the paper regulating plate 36 is prevented.

That is, the second fixing shaft 34 is used as a member for mounting the adjustment screw 35 and as a locking member for preventing the paper regulating plate 36 from moving upward beyond a predetermined value.

Next, the operation of this embodiment will be explained.

First, as shown in FIG. 3, when the paper 27 is set, the paper is transported in the direction of the arrow by the paper feed belt 21 and the pressure roller 23. The roller 23 moves upward, and the paper regulating plate 36 moves above the paper feed belt 21, and the paper 2
It is touching the top of 7.

Therefore, the paper regulating plate 36 does not interfere with paper feeding.

In this state, the paper 27 is separated one by one from the bottom by the paper separation plate 30 and the auxiliary paper feed plate 32 and sent out.

Next, as the paper 27 is fed out from the above state, the pressing roller 23 and the paper regulating plate 36 move downward accordingly, resulting in the state shown in FIG. 4 in which the last paper is fed.

In this state, if the last paper 27' is a thin paper, as explained in FIG. 1, the paper 27' begins to sag, and the sagging pushes the paper regulating plate 36 upward.

However, when the tip of this paper regulating plate 36 comes into contact with the second fixed shaft 34 serving as a locking member, it is prevented from moving any further upward, and therefore, conversely, the deflection of the paper 27' is prevented as shown in the figure. regulate.

Therefore, the paper 27' is not wrinkled or bent, and is smoothly fed out.

In addition, in the previous explanation of the operation, paper 2 is a stack of thin sheets of paper.
7 has been described, but the same applies to the case where only thin sheets of paper are stacked or only one sheet thereof is set.

Since the automatic paper feeder of the present invention is made of bark as described above, even if the paper to be fed is thin, the paper will not be bent or wrinkled. Paper operations can be performed smoothly and reliably.

[Brief explanation of the drawing]

Fig. 1 is a schematic diagram of a conventional automatic paper feeder, Fig. 2 and the following drawings show an embodiment of the automatic paper feeder of the present invention, Fig. 2 is a perspective view, and Figs. 3 and 4 are operational views. It is a figure which shows the principal part side cross section in a different state for explanation. 21...Paper feed belt, 22...Press shaft, 23...Press roller, 27...Slip sheet, 29...Curved rotating body, 30...・Paper separation board, 34
...Second fixed shaft (locking member), 36...
...Paper regulation board.

Claims (1)

[Scope of utility model registration request] A paper feed belt that rotates in the paper feed direction to transport the paper, a pressure roller that is biased in a direction that contacts the paper feed belt, and a tip that contacts the paper feed belt and presses against the paper feed belt. a paper separating plate for separating and feeding the paper between the rollers one by one from below; a pressing shaft that rotatably supports the pressing roller; and a pressing shaft that is swingably attached to the pressing shaft. A paper regulation plate that responds to vertical movement and is brought into contact with the topmost paper; and a mechanism that prevents the paper regulation plate from moving upward when the paper regulation plate moves upward by a predetermined amount, the tip of the paper regulation plate comes into contact with it. an automatic paper feeder, comprising: a stop member, and the paper regulating plate feeds paper while preventing the paper from bending.