JPH0664770A - Large amount paper feeder - Google Patents

Abstract

PURPOSE:To prevent a skew and a jam at the time of feeding paper by feeding the paper surely guided. CONSTITUTION:A side guide 14 is constituted of a holder 13 for connection between pairs of posts 12, 12 in both sides of a liftably provided bottom plate. A through-hole 13a is provided in an upper surface of this holder 13, and an internal surface of the hole serves as a guide part 15. A flap 16 of providing a supporting shaft in a one base end side, plane part 20 placed on paper loaded on a bottom plate and a guide part 21, attached to a side edge of paper folded to a lower side at a right angle from this plane part 20, in the point end side and an engaging part 19, engaged with the guide part 15 to provide a slope tilted to the inside, in the intermediate is formed and turnably mounted to an internal side surface of the holder 13 by the supporting shaft 17, by inserting the engaging part 19 in-out movably in the through hole 13a. When paper is fed, the bottom plate is lifted to press up the plane part 20 of the flap 16 by loaded paper S, and the engaging part 19 is pressed by the guide part 15 to move the flap 16 to the inside, so that the guide part 21 is pressed to a side edge of the loaded paper S.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION The present invention relates to a printer, a copying machine,
It can be applied to a recording device that records on paper by printing, transferring, copying, printing, etc., such as a facsimile and a printing machine. More specifically, the present invention relates to a large-volume sheet feeding device that stacks a large number of sheets on a bottom plate and sequentially feeds the stacked sheets from above in such a recording apparatus.

[0002]

2. Description of the Related Art Conventionally, this type of large-scale sheet feeding device has been shown in FIG.
As shown in FIG. 3, the bottom plate 1 is provided to be movable up and down, and a pair of side guides 2 are set up in the holes 1a on both sides of the bottom plate 1 so as to be movable in the width direction of the bottom plate 1, and the side guides 2 face each other. In some cases, the base end portion of the flap 3 is rotatably attached along the side guide 2 on the surface side, and a guide portion 3a formed by bending the flap 3 at a right angle is provided at the tip end of the flap 3.

Then, the sheets are stacked on the bottom plate 1, the side guides 2 are moved according to the size of the sheets and applied to the both side edges of the stacked sheets 4, and then the bottom plate 1 is pushed up so that the flaps 3 are placed on the upper surface of the stacked sheets. The guide portions 3a are pressed against the side edges of the stacked sheets 4 and the stacked sheets 4 are guided by the side guides 2 on both sides to be sequentially fed out from above, and the fed sheets are further guided by the guide portions 3a of the flaps 3 to be predetermined. It was supposed to lead in the direction.

[0004]

However, since the flaps 3 are rotatably attached to the side guides 2 as described above, when the bottom plate 1 is pushed up, as shown in FIG. In addition, the guide portion 3a rides on the stacked sheets 4, and as shown in FIG. 12, a gap 5 is formed between the guide portion 3a of the flap 3 and the stacked sheets 4 so that the sheets to be fed can be sufficiently guided. It was not there, and it was a cause of skew and jam.

SUMMARY OF THE INVENTION Therefore, an object of the present invention is to reliably guide and feed a sheet, and to prevent skews and jams during sheet feeding.

[0006]

Therefore, according to the first aspect of the present invention, a bottom plate 1 is provided, for example, as in the following illustrated embodiments.
1, the sheets S are stacked on top of each other, and the stacked sheets S are guided by the side guides 14 on both sides to be sequentially fed out, and the fed sheets are further guided by the flaps 16 attached to the side guides 14 in a predetermined direction. On the other hand, in the large-volume sheet feeding device that raises the bottom plate 11 as the sheet is fed out, the guide portion 1 is attached to the side guide 14.
5, a support shaft 17 is rotatably attached to the side guide 14 on the base end side of the flap 16.
On the leading end side, a flat surface portion 20 to be placed on the stacked sheets S and a guide portion 21 for guiding the fed-out sheets in a predetermined direction.
Is engaged in the middle with the guide portion 15 and is pushed by the guide portion 15 when the flat sheet portion 20 is pushed up by the stacked sheet S to push the guide portion 21 to the side edge of the stacked sheet S. It is provided with an engaging portion 19 for hitting,
It is characterized by

According to a second aspect of the present invention, as in the following illustrated embodiment, for example, in the large-volume sheet feeding device of the first aspect, the side guides 14 are provided on both sides of the stacked sheets S with the stacked sheets S interposed therebetween. The post 12 is made up of a pair of posts 12 and a holder 13 that connects the posts 12 to each other. The holder 13 is provided with a through hole 13a having the guide portion 15, and the engagement portion 19 of the flap is provided. It is characterized in that it is provided so as to be inclined and inserted into and out of the through hole 13a.

According to the third aspect of the present invention, sheets are stacked on the bottom plate, and the stacked sheets S are guided by the side guides 14 on both sides, as in the embodiment shown in FIG. In the mass paper feeder, which feeds the paper from above, guides the fed paper further in a predetermined direction by guiding it with a flap 16 attached to the side guide 14, and raises the bottom plate 11 as the paper is fed, A guide portion 15 is provided on the side guide 14, and the flap 16 is attached to the side guide 14 so as to be movable up and down. The flat portion 20 to be placed on the stacked paper S and the fed paper in a predetermined direction are attached to the flap 16. While the guide portion 21 that leads to the guide portion 15 is engaged with the guide portion 15, when the flat portion 20 is pushed up by the stacked sheets S, the guide portion Go inwardly with increases in the guide by 15, and an engaging portion 19 for pressing the guide portion 21 on the side edges of the stacked paper sheets S, and wherein the.

[0009]

According to the first aspect of the invention, when the bottom plate 11 on which the sheets are stacked is pushed up and the flat portion 20 of the flap 16 is pushed up by the stacked sheets S, the engaging portion is formed by the guide portion 15 of the side guide 14. 19 is pressed to move the flap 16 inward, and the guide portion 21 is pressed against the side edge of the stacked sheets S.

According to the second aspect of the present invention, the bottom plate 11 on which the sheets are stacked is pushed up and the flaps 16 are held by the stacked sheets S.
When the flat portion 20 of the
The guide part 15 of the
Is moved and the guide portion 21 is pressed against the side edge of the stacked sheets S.

According to the third aspect of the invention, when the bottom plate 11 on which the sheets are stacked is pushed up and the flat sheet portion 20 of the flap 16 is pushed up by the stacked sheets S, the flap 1
The engaging portion 19 of 6 is guided by the guide portion 15 of the side guide 14 and ascends, and moves inward to press the guide portion 21 of the flap 16 against the side edge of the stacked sheets S.

[0012]

Embodiments of the present invention will be described below with reference to the drawings. FIG. 8 is a perspective view showing a schematic configuration of this mass paper feeder. Reference numeral 10 indicates a device body.
The apparatus main body 10 is provided with a bottom plate 11 on which a sheet is placed so that the bottom plate 11 can be moved up and down. A pair of holes 11a are provided on both sides of the bottom plate 11 in the sheet feeding direction shown by the arrow in the figure. Posts 12 penetrating the holes are formed in the holes 11a. Fit together as shown in
The side guides 14 are formed by connecting the holders 13 in the shape of a bar. The apparatus main body 10 is provided with a side guide adjusting dial 14a, and the side guide 14 is moved by the dial 14a so that the distance between the side guides can be adjusted.

Holders 13 on both side guides 14
Has a vertical U-shaped cross section, and the holder 1
3 is provided, and a rectangular through hole 13a extending in the length direction of the holder 13 is provided, and the inner surface thereof serves as the guide portion 15. On the surface of the holder 13 that faces the other holder 13,
A shaft hole 13b is provided. Then, as shown in FIG. 8, flaps 16 are attached to the holders 13, respectively.

As shown in FIG. 6, the flap 16 has a support shaft 17 projecting from one end of a narrow plate portion 18 which is long in the lateral direction with the plate surface in the vertical direction, and the other end of the narrow plate portion 18 is provided. Has a second narrow plate portion extending upward in the width direction. The second
Of the second narrow plate portion is bent at a right angle in a direction parallel to the support shaft 17 and the tip end thereof is bent downward at an angle slightly smaller than the right angle so that the entire second narrow plate portion serves as the engaging portion 19. The tip side of the portion 19 is inclined so as to gradually separate from the narrow plate portion 18 to the outside. On the other hand, a third narrow plate portion extending from the other end of the narrow plate portion 18 in the direction opposite to the engaging portion 19 is provided, and is bent inward at a right angle to the surface of the narrow plate portion 18. A fourth narrow plate portion extending to both sides of the tip is provided at the tip of the tip, and is defined as a flat portion 20. One end of the plane portion 20 on the support shaft 17 side is bent slightly upward, and the other end is provided with a fifth narrow plate portion extending at a right angle to the outside, and the tip thereof is provided with a narrow plate portion 18.
It is bent at a right angle to the lower side at a position a little past the position intersecting the extension surface of and the bent end portion is used as the guide portion 21. The flap 16 thus formed is the right flap 16 in the sheet feeding direction, and the left flap 16 is formed symmetrically with respect to the sheet feeding direction.

Then, as shown in FIG.
The support shaft 17 is inserted into the shaft hole 13b of the holder 13 and one end of the flap 16 is attached, and the engaging portion 19 is inserted into and out of the through hole 13a, and as shown in FIG.
The flap 16 is supported by applying the engaging portion 19 to the upper surface of the holder 13, and the guide portion 21 is positioned outside the inner surface of the side guide 14 as shown in FIG.

By the way, as shown in FIG. 8, the recording apparatus has engaging grooves 31 provided on both side plates of the sheet feeding section, and the apparatus main body 10 of the mass sheet feeding apparatus is connected to the recording apparatus main body 30. The sheet is stacked on the bottom plate 11 by engaging with and mounting the mating groove 31. Then, the dial 14a is operated to adjust the distance between the both side guides 14 according to the size of the stacked sheets S, and the both sides are adjusted, and then the bottom plate 11 is lifted to bring the upper surface of the stacked sheets S to the recording apparatus main body. It is pressed against the paper feed roller 32 of 30. At this time, since the guide portion 21 is outside the inner surface of the side guide 14 as described above, it is possible to prevent the guide portion 21 from riding on the upper surface of the stacked sheets S.

Then, as shown in FIGS. 4 and 5, the upper surface of the stacked sheets S pushes up the flat portion 20 of the flap 16,
The flap 16 pivots upward on the tip side about the support shaft 17. At the same time, as shown in FIG.
9 rises while engaging its inclined surface with the guide portion 15 of the holder 13. Therefore, the flap 16 is pushed by the guide portion 15 and gradually moves inward as the engaging portion 19 rises, and the guide portion 21 presses the side edge of the stacked sheets S and sends out the sheet as shown in FIG. To guide you.

In the above-described embodiment, the support shaft 17 of the flap 16 is inserted into the shaft hole 13b of the holder 13 and the engaging portion 19 is inserted into the through hole 13a, so that the flap 16 is rotatable about the support shaft 17. I installed it, but as shown in Figure 9,
You may comprise. That is, the holder 13 is provided with a rectangular through hole 13a extending parallel to its lengthwise direction, the upper end of the post 12 is bent inward, and the holder 13 is attached to the upper end so that the upper side of the holder 13 is inward. Install by tilting inward.

On the other hand, both flaps 16 in the above embodiment.
The surface of the narrow plate portion 18 is inclined inward so as to follow the inner side surface of the holder 13, and the engaging portion 19 extending in the width direction from the narrow plate portion 18 is bent in a U shape. The engaging portion 19 is put into the through hole 13a of the holder 13 so that the flap 1
6 is attached to the holder 13.

Then, the sheets are stacked on the bottom plate 11, and the side guides 14 are moved and adjusted according to the size of the sheets and applied to both sides of the stacked sheets S, and then the bottom plate 11 is lifted to the upper surface of the stacked sheets S. Is pressed against the paper feed roller 32 of the recording apparatus main body 30.

Then, the upper surface of the stacked sheets S is flap 16
Of the engaging portion 19
While engaging with the guide portion 15 which is the inner surface of the holder 13. Therefore, the flap 16 is pushed by the guide portion 15 and the entire portion gradually moves inward as the engaging portion 19 rises, and the guide portion 21 presses the side edge of the stacked sheets S to guide the fed sheets.

[0022]

Therefore, according to the present invention, when the bottom plate loaded with sheets is pushed up and the flat portion of the flap is pushed up by the loaded sheets, the guide portion of the side guide pushes the engaging portion to move the flap inward. Since the guide portion is pressed against the side edge of the stacked sheets, it is possible to reliably guide the sheets and prevent skews and jams during sheet feeding.
Further, by locating the guide portion outside the inner surface of the side guide first, the guide portion does not ride on the stacked sheets when the flat portion of the flap is pushed up by the stacked sheets.

[Brief description of drawings]

FIG. 1 is a rear view showing, in a partial cross-section, a state where a flap and a holder are engaged with each other before a stack of sheets is raised, showing a mass-feeding device according to an embodiment of the present invention.

FIG. 2 is a side view showing the relationship among stacked sheets, flaps, and side guides before the stacked sheets are raised.

FIG. 3 is a rear view thereof.

FIG. 4 is a side view showing the relationship between the stacked sheets after they have been raised.

FIG. 5 is a rear view thereof.

FIG. 6 is an external perspective view of the flap.

FIG. 7 is an exploded perspective view showing an assembled state of the post of the side guide and the holder.

FIG. 8 is a perspective view showing the mass paper feeder and its attachment.

FIG. 9 is a rear view showing in partial cross section the engagement state between the flap and the holder before raising the stacked sheets in the mass paper feeder according to another embodiment of the present invention.

FIG. 10 is a schematic perspective view showing a conventional bulk paper feeder.

FIG. 11 is a diagram showing a state in which the guide portion of the flap rides on the stacked sheets.

FIG. 12 is a diagram showing a state in which a gap is formed between a guide portion of the flap and a side edge of stacked sheets.

[Explanation of symbols]

 11 Bottom Plate 12 Post 13 Holder 13a Through Hole 14 Side Guide 15 Guide Part 16 Flap 17 Spindle 19 Engagement Part 20 Flat Part 21 Guide Part S Stacked Paper

Claims (3)

[Claims] 1. A sheet is stacked on a bottom plate, the stacked sheets are guided by side guides on both sides and sequentially fed out from above, and the fed sheets are further guided by flaps attached to the side guides in a predetermined direction. In the large-volume sheet feeding device that raises the bottom plate as the sheet is fed to the side guide, the side guide is provided with a guide portion, and the base end side of the flap is rotatably attached to the side guide. The shaft has, at its tip side, a flat portion to be placed on the stacked sheets and a guide portion for guiding the fed-out sheet in a predetermined direction, and in the middle, engages with the guide portion and pushes up the flat portion by the stacked sheets. The large-volume sheet feeding device, which is provided with an engaging portion that is pushed by the guide portion when pressed and pushes the guide portion against the side edge of the stacked sheets. 2. A through hole having a pair of posts, each of which stands up on both sides of the stack of sheets, and a holder connecting the pair of posts, the holder having the guide portion in the holder. 2. The mass paper feeding device according to claim 1, wherein the engaging portion of the flap is inclined, and the engaging portion of the flap is slidably inserted into the through hole. 3. A sheet is stacked on a bottom plate, and the stacked sheets are guided by side guides on both sides and sequentially fed out from above, and the fed sheets are further guided by flaps attached to the side guides in a predetermined direction. On the other hand, in a large-volume sheet feeding device that raises the bottom plate as the sheet is fed out, a guide portion is provided on the side guide, and the flap is attached to the side guide so that the flap can move up and down. A flat portion to be placed on the stacked sheets, a guide portion that guides the fed-out sheet in a predetermined direction, and a guide portion are engaged, while the flat portion is pushed up by the stacked sheets and is guided by the guide portion. And a moving part inwardly, and an engaging portion that presses the guide portion against the side edge of the stacked sheets.