JPS60191926A - Automatic paper feeding device - Google Patents

Abstract

PURPOSE:To facilitate the supply of papers, by a method wherein, in a titled device for duplicator and other like devices, a moving plate for holding paper laminate is held in a position, allowing it to be spaced away from a paper feed roller through utilization of a permanent magnet, and the papers are supplied. CONSTITUTION:When papers are supplied, a moving plate 15 is pressed backward against a spring 18 through manual operation. This causes the moving plate 15 to be adsorbed to a permanent magnet 20 to hold it thereat, and it is spaced far away from a paper feed roller 19. With this, papers are easily supplied to the moving plate 15. Thereafter, with a release lever 25 pulled this way as shown by an arrow mark, the back of the moving plate 15 is pushed by means of a press piece 24 to separate the moving plate 15 from the magnet 20, and the moving plate 15 is rotated to the paper feed roller 19 side through the force of a spring 18 to bring it into a condition in which the papers can be fed. This constitution permits facilitation of the supply of the papers.

Description

DETAILED DESCRIPTION OF THE INVENTION (Technical Field of the Invention) The present invention relates to an automatic paper feeding device in which a movable plate for holding sheets in a stack is held at a position separated from a paper feeding roller by a permanent magnet.

[Technical background of the invention]

Automatic paper feeding devices are installed in printing devices such as printers and typewriters, as well as copying machines and other office machines, and are used for self-feeding, and are used to hold multiple sheets of paper in a stack. It is generally known that a movable plate is constantly biased by a spring in the direction of the paper feed roller to press the uppermost sheet of paper against the outer peripheral surface of the paper feed roller, and the paper is sent out by rotation of the paper feed roller. There is.

In this type of automatic paper feeder, when replenishing paper, it is necessary to hold the movable plate at a position separated from the paper feed roller. .

Therefore, in the past, the movable plate was held at a position separated from the paper feed roller by a hook.

[Problems with background technology]

However, in the configuration in which the movable plate is held by a hook, a roller is required to move the movable plate slightly beyond the normal holding position in the direction opposite to the paper feed roller, so-called opacity 1. In order to take the opacity roller, the movable plate is in a state where it can move toward the opacity 1 even when it is held in the holding position, and when replenishing paper, etc., the movable plate may move. There was a problem in that paper replenishment work was difficult to perform.

[Purpose of the invention]

The present invention was made based on these circumstances.
The purpose of this is that there is no need to move the movable plate that holds the stacked sheets of paper in the direction opposite to the paper feed roller, and the movable plate can be stably held in a position away from the paper feed roller, making it easier to perform paper replenishment operations. An object of the present invention is to provide an automatic paper feeding device that can be easily operated.

[Summary of the invention]

In order to achieve the above object, the automatic paper feeder of the present invention includes a movable plate that holds a plurality of sheets of paper in a stack, and rotates with its outer peripheral surface in contact with the surface of the uppermost sheet held by this movable plate. a paper feed roller that feeds the paper, one or more springs that constantly bias the movable plate in the paper feed roller direction A, and the movable plate separated from the paper feed roller by attraction between a permanent magnet and a magnetic body. The movable plate is configured to include a suction mechanism that holds the movable plate in position, and a release mechanism that releases the suction mechanism from holding the movable plate in place.

[Embodiments of the invention]

The figure shows one embodiment of the invention.

The automatic paper feeder 1 is used for automatic paper feeding by being attached to printing devices such as printers and typewriters, as well as copying machines and other office machines.Here, an example in which it is attached to a printer 2 and used Let us show the following.

FIG. 1 shows the state in which the automatic paper feeder 1 is attached to the top surface of the printer 2. The main body frame 3 of the automatic paper feeder 1 is attached to the printer 2 via a mounting base 4. .

The mounting base 4 is removably attached to the top surface of the printer 2,
The main body frame 3 is detachably attached to the mounting base 4.

Figures 2 to 4 are vertical cross-sectional views of the automatic paper feeder 1 in relation to the upper part of the printer 2 (indicated by j). The figure shows the paper supply state.

In FIGS. 2 to 4, 5 is a cylindrical platen installed in the printer 2, 6 is an arc-shaped paper pan disposed to cover the lower half of the outer circumference of the platen 5, and 7a , 7b is a pinch roller that penetrates the paper pan 6 and comes into pressure contact with the outer peripheral surface of the platen 5, and 8 is a pinch roller that penetrates the paper pan 6 and presses against the outer peripheral surface of the platen 5.
It is a pail roller that presses against or separates from the upper part of the outer peripheral surface. A paper passage port 10 is provided in the outer casing 9 of the printer 2 (
The trailing edge of the paper passage port 10 is bent inward.
The number of CC paper feeders is 11. Also, paper passage port 1
The front edge of the transparent cover 12 forms a part of the transparent cover 12 and is bent outward to form an external fixing guide 13. Roughly close to the outer peripheral surface of the platen 5, a kite member 14 having a V-shaped cross section is disposed with its bent corner facing toward the paper passage port 10.

-Right-The position of the white moving board 1 is as follows-In the figure, 15 is a movable plate that holds multiple sheets of paper 16a in a stack, and this movable plate 15 is fixed to the main body frame 3. Fixed plate 17
The upper end is rotatably supported on. Also, the fixed plate 17
A compression coil spring 18 is interposed between the movable plate 15 and the movable plate 15, and the movable plate 15 is always urged to rotate in the direction of the paper feed roller 19 by the spring 18. As shown in FIG. 5, the compression coil springs 18 are arranged at two locations on the left and right, and both are held on the outer periphery of a cylindrical spring receiver 18a fixed to the surface of the fixed plate 17. Further, the movable plate 15 is made of a magnetic material such as an iron plate, and a permanent magnet 20 is embedded in the end face of the spring receiver 18a as a suction mechanism that attracts and holds the movable plate 15 at a position separated from the paper feed roller 19. It's included.

Incidentally, reference numeral 21 in FIGS. 2 to 4 is a stopper member that brings the corners of the uppermost sheet 16a stacked and held on the movable plate 15 into contact to align the sheets. Further, reference numeral 22 in FIG. 5 denotes a thin non-slip member 65 made of cork or the like, which is pasted on the paper stacking surface of the movable plate 15. Furthermore, as shown in FIGS. 2 to 4, an operating shaft 23 is rotatably spanned between the left and right side plates of the main body frame 3, and a pressing piece 24 J> and an operating lever 25 are attached to this shaft 23. The operating lever 25 is located outside the main body frame 3 as shown in FIG. Further, these operating shaft 23, pressing piece 24, and operating lever 25 are released together with a spring 26 that integrally urges them to rotate in one direction counterclockwise in the figure.
The pressing piece 24 is always brought into pressure contact with the back surface of the movable plate 15 by the elasticity of the spring 26.

Reference numeral 28 in FIGS. 2 to 4 is an internally fixed guide, which guides its lower end into the paper passing day 10 in an oblique direction (I [! 1
The paper 16a fed out by the first
The paper passing day 10 is carried out on the supply guide surface 28a).
This guides the printer 2 further into the printer 2. The external fixed guide 13 faces the upper surface (first discharge guide surface 28b) of the internal fixed kite 28, and the external fixed guide 13
and the first paper discharge guide surface 28b.
A paper path 29 is connected to the paper path 29.

The upper half of the internal fixed guide 28 is covered by a movable guide 30. The movable guide 30 has an upper end rotatably supported near the upper end of the internal fixed guide 28, and a lower end approaching the paper path 29.
The inner surface is a second paper discharge guide surface 30a1, and the outer surface is a second paper feed guide surface 3ob, and is biased to rotate in a direction approaching the internal fixed guide 28 by a tension spring 31. Further, a switching operation member 3 is provided at one side edge of this movable guide 30.
2 is rotatably mounted. This switching operation member 32 is a small L-shaped piece as shown in FIG. 6, and is rotatable around a shaft 33 fixed to one side edge of the movable guide 30. The area is limited to about 90'' between the bin 34, which also serves as J, and the back surface of the movable guide 30. Then, when the switching operation member 32 is made almost perpendicular to the movable guide 30 as shown in FIG. 30a is continuous with the first paper discharge guide surface 28b, and the upper end opening of the paper path 29 is closed by the movable guide 30. Also, as shown in FIG. 33, the second paper feed kite surface 30b forms substantially the same plane as the first paper discharge guide surface 28b and continuously covers the first paper discharge guide surface 28b.

A stocker section 35 is provided above the movable guide plate 30. The smearing section 35 includes a pair of 1) 1 generation []-ra 36a that sandwich the printed paper M16b discharged along the first and second paper discharge chises 1 to 28b and 30a.
, 36b, and a stocker 37 that receives and holds the printed sheets 16b that have passed through these rollers 36a and 36b in a stacked manner. .

Nad-3, 38a and 38b in Figs. In addition, 38c in the figure indicates that 2-a) H'/
-V No 1:l-=7/m of the 7th pull I meeting!
++It is for the same use.

The paper discharge roller 36b is driven by a motor 39 provided in the printer 2 for driving the platen 5, as shown in FIG. That is, the rotation of the motor 39 is caused by the motor gear 40. Intermediate gear 41 and platen gear 4
2 to the platen 5. On the other hand, the mounting base 4 has a gear 4 that meshes with the platen gear 42 in series.
3.44,. 45 and 46 are installed on one side plate of the main body frame 3.
gears 47.6 meshing in series with gears 47. A, 8.49 is installed). The gear 49 meshes with a gear 50 that rotates integrally with the one sheet ejecting roller 36b, so that when the platen 5 rotates, the sheet ejecting roller 36b rotates in the same direction as the platen 5 and can perform sheet ejecting operation. Further, a spring clutch 51 (see FIG. 8) is provided coaxially with the gear 48. This spring clutch 51
To explain the configuration with reference to FIG. 8, a shaft 5 is rotatably supported by the main body frame 3 and has the paper feed roller 19 fixed thereto.
A sleeve 48a integral with the gear 48 is rotatably fitted to one end of the sleeve 48a, a coil spring 53 is wound around the outer periphery of the sleeve 48a, and a circle body 54 is fitted around the outer periphery of the sleeve 48a. One end 53a of the spring is locked to the inner periphery of the body 54, and a cap 55 is fixed to one end of the cylindrical body 54, so that the cap 55 and the shaft 52 are rotated together through a pin 56. Lock, circle 1n
The claw lever 57 is configured to selectively engage a protrusion 54a provided on the outer periphery of the body 54. Claw lever 5
7 is always engaged with the protrusion 54a by the spring 58, and in this state the rotation of the cylindrical body 54 is prohibited by the pawl lever 57, so that the tightening of the spring 53 against the sleeve 48a is not effective. Therefore, the rotation of gear 718 is not transmitted to shaft 52. To remove the claw lever 57 from the protrusion 54a, the electromagnet 59 shown in FIG. 7 is energized. When the claw lever 57 is attracted to the five electromagnets and removed from the protrusion, the spring 53 is not fully tightened against the sleeve 48a, and the cylindrical body 54,
The shaft 52 and the paper feed roller 19 rotate together with the gear 48.

Next, the operation will be explained.

First, in order to automatically feed paper to the printer 2, the switching operation member 32 is set up as shown in FIG. In this case, the tip of the movable guide 30 rises from the internal fixed guide 28, and the second paper discharge guide surface 30a of the movable guide 30 comes to be continuous with the first paper discharge guide surface 28b. Further, the outer opening of the paper path 29 is closed at the tip of the movable guide 30. Further, the movable plate 15 holds a predetermined stack of sheets 16a, and the uppermost sheet 16a is pressed against the sheet feeding roller 19 by a spring 18. In this state, the electromagnet 59 is energized and the motor 3
9, the paper feed roller 19 rotates together with the platen 5 in the direction of the arrow in FIG. After passing through the paper path 10, the paper pan 6
and the guide member 14, and further the platen 5
and the pinch roller 7a. Thereafter, it is wound around the platen 5 by rotation of the platen 5 itself, and predetermined printing is performed by a print head (not shown). The printed paper 16b passes between the platen 5 and the pail roller 8 (however, at this time, the pail roller 8 once moves away from the platen 5 to facilitate the passage of the paper 16b), and then passes between the external fixed guide 13 and the internal fixed The paper is guided to a paper path 29 formed between the guide 28 and the paper path 29 . Furthermore, the rollers 36a and 36b rise from the first paper ejection guide surface 28b of the internally fixed kite 28 along the second paper ejection guide surface 30a continuous thereto, and rotate at the same time as the platen 5. These rotating parts are clamped and received in the wrist holder 37.

Next, if it becomes necessary to print on the cut sheet 6o by hand while automatically feeding paper in the state shown in FIG. 2 as described above, rotate the switching operation member 32. In the state shown in FIG. 3, the second sheet feeding guide surface 30b of the movable guide 30 is
And along the first paper ejection guide surface 28b of the internally fixed kite 28, the paper path "M 9Q [h L, -nt PE m
Paper GO can be inserted from above. Then, after passing through two paper paths, the cut sheet 60 passes through the paper pan 6
and the guide member 14, and further the platen 5
and the pinch roller 7a. Thereafter, the paper is wound around the platen 5 by rotation of the platen 5 itself, and predetermined printing is performed by the print head. Then, the printed cut sheet passes between the platen 5 and the pail roller 8,
The paper is guided to the paper path 29 again. Further, since the internal fixed guide 28 rises from the first paper discharge guide surface 28b along the second paper discharge guide surface 30b that is continuous thereto, the printed paper can be easily taken out.

Next, when replenishing paper to the movable plate 15 or replacing paper, the movable plate 15 may be manually pushed backward against the spring 18. As a result, the movable plate 15
is attracted and held by the permanent magnet 20 and is in a state far away from the paper feed roller 19 as shown in FIG. 4, so the movable plate 1
You can perform tasks such as replenishing paper on the top of the printer or replacing paper.

In this case, there is no need to move the movable plate 15 extra in the direction opposite to the paper feed roller, and the movable plate 15 can be stably held at a position spaced apart from the paper feed roller 19. Since the movable plate 15 is fixed while being attracted to the permanent magnet 2o, operations such as paper replenishment and paper replacement can be performed extremely easily. Furthermore, since both the left and right permanent magnets 20 are provided within the spring 18, there is no possibility that the movable plate 15 is deformed by twisting or the like due to the elasticity J of the spring 18.

Also, when you finish replenishing paper or replacing paper, C is released (
When the operating lever 25 of the number 27 is pulled toward you as shown by the arrow in FIG.
5 is rotated by the spring 18 in the direction of the paper feed roller 19, and again the paper 16a at the highest position on the movable plate 15' is moved to the second paper 16a.
It comes into pressure contact with the outer periphery of the paper feed roller 19 as shown in FIG.

At this time, since the springs 18 are symmetrically provided, they can press the C1 movable plate 15 in a well-balanced manner.

Note that the present invention is not limited to the above configuration.

For example, instead of using the movable plate 15 itself as a magnetic material, the permanent magnet 20
The magnetic material may be fixed only to the region where it is attracted to. Further, the same effect can be obtained by attaching the permanent magnet 20 to the movable plate 15 side and attaching the magnetic body attracted to the permanent magnet to an arbitrary fixed part. Furthermore, the automatic paper feeder of the present invention is applicable not only to printers but also to copiers and other office equipment.
It can also be applied as a device for feeding paper to.

〔Effect of the invention〕

As detailed above, according to the automatic paper feeder of the present invention,
There is no need to move the movable plate that holds the stacked sheets of paper in the direction opposite to the paper feed roller, the movable plate can be stably held at a position separated from the paper feed roller, and paper replenishment work can be easily performed. It is possible to achieve excellent effects such as (q).

[Brief explanation of drawings]

The figures show one embodiment of the present invention, and FIG. 1 is a perspective view showing a state in which an automatic paper feeder is attached to a printer, and FIG. 2 is a schematic cross-sectional view showing an automatic paper feed state of the automatic paper feeder. , Figure 3 shows the state of sheet feeding by manual feeding. 4 is a schematic sectional view showing the state of paper supply, FIG. 5 is a plan view showing a part of the movable plate, and FIG. 6 is a schematic sectional view of the switching operation member relative to the movable guide. FIG. 7 is a schematic side view showing the drive system, and FIG. 8 is an exploded perspective view showing the vicinity of the spring clutch. 1... automatic paper feeder, 2... printer, 15...
Movable plate, 16a...paper, 18...compression coil spring, 19...paper feed roller, 20...permanent magnet,
27... Cancellation (1pf. Applicant's representative Patent attorney Takehiko Suzue Figure 5 Figure 7 Procedural amendments Showa 51C1, June 18]) Commissioner of the Patent Office Kazuo Wakasugi 1, Patent application for indication of the case No. 59-44887 No. 2, name of the invention / automatic paper feeder 3, correction 1h small (related to cows) Special applicant (356) Tokyo Kouki Co., Ltd. 4, generation 1 Kojinzu ijt + Figure 8 is corrected as shown in the attached sheet.

Claims (1)

[Claims] 1) A movable plate that holds a plurality of sheets of paper in a stack, and a feeder that sends out the paper by rotating the outer circumferential surface of the uppermost sheet of paper held by the movable plate. paper]-ra, one or more springs that constantly force the movable plate toward the paper feed roller, and the movable plate is held at a position separated from the paper feed roller by attraction between a permanent magnet and a magnetic body. An automatic paper feeder characterized in that it has a suction mechanism for releasing the suction and holding state of the movable plate (!9. Claim 1, characterized in that at least one of the springs is a compression coil spring, and the permanent magnet is disposed within the compression coil spring.
) The automatic paper feeder described in section 2.