JPH0218022Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Industrial Application Field] This invention relates to a paper feeding device attached to a printer, typewriter, copying machine, etc.

[Prior Art] Generally, printing devices such as printers and typewriters are supplied with paper for printing from a paper feed device. This paper feed device is attached to the paper feed/discharge port of the printing device, and feeds the paper stacked on the paper feed tray to the plantain of the printing device from the paper feed roller or manually feeds a single sheet of paper to the plantain of the printing device. The paper on which printing has been performed is passed between a paper ejection roller and a paper ejection guide and is stored on a paper ejection table.

Such a paper feed device includes a paper feed rotor that feeds the sheets stacked on the paper feed tray in the paper feeding direction, and a separation claw that engages with the leading edge corner of the paper on the paper feed tray and separates the sheets one by one. A paper side edge regulating piece that is integrally provided with the separation claw and guides the side edge of the paper separated into single sheets by the separation claw is known (Japanese Patent Publication No. 47-38826). (see publication).

[Problem to be solved by the invention] However, since the above-mentioned conventional paper side edge regulating pieces are at the same height as the separation claws, for example, if a large deviation occurs when the front ends of the paper separate from the left and right separation claws, Another problem is that when the paper is skewed and fed out, the leading edge of the paper runs over the paper side edge regulating piece, making it impossible to correct the skew.

The object of this invention is to provide a paper feeding device that can reliably guide the side edges of sheets fed out in a skewed manner, suppress skew to a minimum, and stably feed sheets.

[Means for Solving the Problems] In order to achieve the above object, the present invention has the following features.

That is, in the present invention, the paper side edge regulating pieces 50L, 50
R is higher than the separation claws 26L and 26R and the separation claw 2
It is characterized by extending forward in the paper feeding direction from 6L and 26R.

[Function] In the present invention, the paper side edge regulating pieces 50L, 50
R is higher than the separation claws 26L and 26R and the separation claw 2
6L and 26R in the paper feeding direction, the paper that is skewed and fed out may fall into the paper side edge regulation pieces 50L and 50R, for example when the leading edge of the paper does not separate from the left and right pair of separating claws at the same time. To obtain a paper feeding device whose side edges are reliably regulated without running over and can suppress skew to a minimum.

[Example] Hereinafter, an example of this invention will be described with reference to the drawings.

In this embodiment, as shown in FIG.
The paper feed device 3 attached to the paper feed/discharge port 2 will be explained as an example.

First, the printing device 1 includes a platen 5 attached to a platen shaft 4, a head carriage 6 that can reciprocate laterally along the platen 5, a print head 7 attached to the carriage 6, and a print head 7 attached to the print head 7 around the platen 5. It includes a guide 8 and pinch rollers 9 and 10 provided along the surface.

On the other hand, the paper feed device 3 has side frames 11 on both sides.
(Only one side frame is shown in the diagram.)
an arcuate support portion 1 that fits with the platen shaft 4;
It has 2.

Further, inside the side frame 11, a lock lever 13 is supported at its intermediate portion by a shaft 14. This lock lever 13 is used to fix the paper feeder 3 to the platen 4, and has an engaging portion 15 at one end that engages with the platen shaft 4.

A square shaft 16 is provided at the rear of the side frame 11.
is provided and is adapted to be rotated by operating the set lever 17. This square shaft 16 has a bearing 1
Side edge guide 19 integrated with the paper feed tray via 8
L and 19R are installed. Side edge guide 19
L and 19R are rotatable about the square shaft via bearings 18. Note that the bearing 18 is movable in the length direction of the square shaft 16.

Between the bearings 18, 18 at both ends of the side edge guide 19R, as shown in FIG. is embedded.

One end of a leaf spring 21 is fixed to this collar 20. The other end of the leaf spring 21 is adapted to come into contact with the bottom of the side edge guide 19R when the square shaft 16 rotates.

The side edge guides 19L, 19R are provided with side plates 22L, 22R on one side, respectively. These side plates 22L, 22R are provided with a notch 25 as shown in FIG. 1, which supports synthetic resin roller receivers 24L, 24R attached to paper feed rotors, such as paper feed rollers 23L, 23R. .

Note that the paper feed rotating body is not limited to a roller, but may be a belt or the like.

In addition, the side plates 22L and 22R include a separation lever 27L made of metal or synthetic resin,
27R is rotatably supported by shafts 28L and 28R. The separation levers 27L, 27R include separation claws 26L, 26R that engage with the leading edge corners of the paper, and paper side edge regulating pieces 50L, 50R that guide the paper separated from the separation claws 26L, 26R. The paper side edge regulating pieces 50L, 50R are higher than the separation claws 26L, 26R, and are higher than the separation claws 26L, 26R.
A separating claw 26 extends forward in the paper feeding direction from 26R.
It is provided integrally with L and 26R.

At the front bottom of the side edge guides 19L and 19R, there is a second
As shown in the figure, a shaft 29 is inserted through the shaft 29, and the side edge guide 19L is fixed to this shaft 29.
R is movable in the length direction. Further, the shaft and the square shaft 16 are connected by a plate 30. Note that the plate 30 is rotatable in the circumferential direction of the square shaft 16.

Furthermore, paper feed frames 31L and 31R are detachably attached to the rear portions of the side edge guides 19L and 19R.

A tip regulating stopper 3 is provided on the surface facing the paper feed rollers 23L, 23R and roller receivers 24L, 24R.
4 is installed.

A manual feed guide plate 35 and a paper discharge guide plate 36 are attached in front of the paper feed rollers 23L, 23R, forming a manual feed slit 37. Note that a paper discharge frame 38 that holds the manual feed guide plate 35 is removably attached.

A paper ejection roller 40 is attached to a drive shaft 39 above the paper ejection guide plate 36, and together with a paper ejection guide 42 rotating about a shaft 41, guides the paper toward the paper ejection frame 38 side. Note that this paper ejection frame 38, the manual feed guide plate 35, and the paper ejection guide plate 36 constitute a paper ejection table.

In the above configuration, the paper is placed on the side edge guide 1.
9L and 19R, when the side edge guides 19L and 19R are lowered as shown in FIG.
Move R along axes 16,29. At this time, since the edge of the notch 25 of the side plate 22R is engaged with the roller receiver 24R, the roller receiver 24R and paper feed roller 23R move together with the side edge guide 19R.

Further, the separation lever 27R attached to the side plate 22R also moves with the paper side edge regulating pieces 50L and 50R in contact with the guide surface of the paper guide plate 33.

Furthermore, the collar 20 provided between the bearings 18, 18 of the side edge guide 19R moves along the shaft 16. At this time, since no load is applied to the collar 20, it moves smoothly.

The set lever 17 of the side edge guide 19R is rotated according to the paper size. This causes the square shaft 16 to rotate clockwise in FIG. Therefore, the collar 20 also rotates. Since one end of the leaf spring 21 is fixed to the collar 20, the other end is attached to the side edge guide 19.
The plate spring 21 is elastically deformed in contact with the bottom part of R and pushes up the side edge guide 19R.

Since the side edge guide 19L is connected to the side edge guide 19R via the shaft 29, the side edge guide 19
Along with R, the side edge guide 19L rises.

Then, due to the elastic deformation of the leaf spring 21, the collar 20
is pressed against the square shaft 16. Further, the leading edge corner portion of the paper engages with the separation claws 26L, 26R, and as the paper rises, the separation levers 27L, 27R also rise, and the paper side edge regulating pieces 50L, 50R separate from the guide surface of the paper guide plate 33.

When the paper is pressed against the paper feed rollers 23L and 23R, the setting is completed. At this point, the collar 20 is brought into maximum pressure contact with the square shaft 16 due to the multiple force caused by the elastic deformation of the leaf spring 21, and the collar 20 is fixed to the square shaft 16.

In such a state, when a printing command is given to the printing device 1 from a computer or the like, the square shaft 3
2 rotates and the paper is pushed out by paper feed rollers 23L and 23R. At that time, the leading edge corner of the paper is caught by the separating claws 26L and 26R, and when it bends and bounces beyond its elastic limit, it is separated into one sheet. This separated paper is separated by a paper side edge regulating piece 50.
The paper is guided by its side edges by L and 50R, passes between the paper guide plate 33 and the manual feed guide plate 35, and is fed between the platen 5 and the guide 8.

When the paper wraps around the platen 5 and is printed by the print head 7, the paper enters inside from the front of the paper ejection guide 42, passes between the paper ejection guide 42 and the paper ejection roller 40, and then passes through the paper ejection guide 36 and the paper ejection frame. 3
It will be stored and stored at 8.

When the number of sheets of paper held by the side edge guides 19L and 19R is reduced or the size is changed, the set lever 17 is returned to its original position. As a result, the square shaft 16 rotates to the left, and the leaf spring 21 returns to its original state. Therefore, as the side edge guides 19L and 19R descend, the pressing force of the collar 20 against the corner shaft 16 weakens. When the state is completely released, the paper side edge regulating piece 5
When 0L and 50R come into contact with the guide surface of the paper guide plate 33, the pressure on the collar 20 is released and the side edge guide 19R becomes movable along the shafts 16 and 29, allowing the size to be changed.

As described above, according to this embodiment, the separation claw 26
Paper side edge regulating pieces 50L, 50R that are higher than L, 26R and protrude toward the paper guide plate 33 are separated by separation levers 27L, 27 having separation claws 26L, 26R.
Since it is provided in R, the side edges of the paper pushed out by the paper feed rollers 23L, 23R are regulated by the paper side edge regulating pieces 50L, 50R.

Therefore, even if, for example, the leading edge corner of the paper is skewed and sent out without being released from the separation claws 26L, 26R at the same time, the paper will not run over the paper side edge regulating pieces 50L, 50R and will securely secure its side edges. skew can be minimized.

One embodiment of this invention has been explained above,
This invention is not limited to the above embodiments.

For example, in the above embodiment, the separation claws 26L, 26R and the paper side edge regulation pieces 50L, 50R are integrally molded, but a separately formed paper side edge regulation piece is attached to a separation lever equipped with a conventional separation claw. It may also be integrated.

[Effects of the invention] As explained above, in this invention, the paper side edge regulating piece is higher than the separation claw and extends further forward than the separation claw in the paper feeding direction, so that the skewed paper is To obtain a paper feeding device that can be reliably guided without riding on an edge regulating piece and can suppress skew to a minimum.

[Brief explanation of the drawing]

1 and 2 are views showing one embodiment of this invention, in which FIG. 1 is a sectional view showing the internal structure of the paper feeding device, and FIG. 2 is a partially omitted structure showing the structure around the paper feeding roller. FIG. 1... Printing device, 3... Paper feeding device, 5... Platen, 19L, 19R... Side edge guide, 22L,
22R...Side plate, 23L, 23R...
Paper feed roller, 26L, 26R...separation claw, 27
L, 27R...Separation lever, 33...Paper guide plate, 34...Tip regulation stopper, 50L, 50R
...Paper side edge regulation piece.

Claims (1)

[Claims for Utility Model Registration] Paper feed rotating bodies 23L, 23R that send out the sheets stacked on the paper feed trays 27L, 27R in the paper feeding direction, and engage with the leading edge corners of the sheets on the paper feed trays 27L, 27R. Separation claw 26 that separates sheets of paper one by one
L, 26R and these separation claws 26L, 26R are provided integrally,
A paper side edge regulating piece 50 that guides the side edge of the paper separated into single sheets by the separation claws 26L and 26R.
L, 50R; In a paper feeding device equipped with
Higher than 6L, 26R and separation claws 26L, 26R
A paper feeding device characterized by extending further forward in the paper feeding direction.