JPS62196233A - Recording paper sheet supply device with position limiting member - Google Patents

Abstract

PURPOSE:To make it possible to perform certain and accurate sheet supply, by providing a rear surface limiting member arranged in order to limit the rear end of a bundle of recording sheets transferred on a receiving plate in a manner to be freely rotated around a member integrated with the receiving plate. CONSTITUTION:A radii-like groove 32B whose center is a rotating shaft 34 is provided in the vicinity of a rear surface limiting member 32 and is made slidable to the fixing shaft 35 with an attaching plate 33. In the rising process of a receiving plate 31, the rear end limiting member for limiting a bundle of sheets in contact with the rear end thereof rises at the same time. And, when the rising is stopped, a pressing force is applied to the top 32C by the rising force of the receiving plate 32. When the receiving plate 32 rises furthermore, the top 32C is slided on the inner wall of a cover body 26 so that the limiting member is rotated clockwisely around the rotating shaft 34. Therefore it is possible to eliminate troubles of sheets supply and smoothing supply the sheets to a coping machine body with accuracy.

Description

[Detailed Description of the Invention] [Field of Industrial Application] The present invention relates to a paper feeding device for various image recording devices such as copying machines such as electrophotographic copying machines, computer output printers, and light printing machines. Holds a large amount of recording paper.
The present invention relates to a recording paper position regulating means of a paper feeding device that can supply and replenish a recording section sheet by sheet.

[Conventional technology]

In each of the above-mentioned image recording devices, various types of cut paper such as plain paper, printing paper, photosensitive paper, pressure-sensitive paper, thermal paper, electrostatic recording paper, transfer paper, synthetic resin recording sheet, etc. are fed and transported by the main body of the recording device. When supplying paper to a section, a so-called cassette paper feeding method is adopted in which the paper is stored in a paper feeding cassette and then loaded into a cassette receiving section of the main body of the apparatus.

Such paper feed cassettes are usually small and the amount of recording paper they can accommodate is limited, so in a recording device that uses a large amount of recording paper and is capable of high-speed recording, it is necessary to replenish the recording paper frequently. There are drawbacks that must be met.

Recently, in this type of high-speed recording apparatus, in response to the above-mentioned high operation rate, a large capacity paper feed stacker of 1000 to 2000 sheets has been attached to the paper feed conveyance section of the main body of the recording apparatus.
A highly efficient paper feed system that feeds recording paper in a nearly horizontal direction using the elevating means and paper feeding means installed on the paper feed stacker side, and continuously feeds and transports a large number of recording paper sheets over a long period of time. A device has been proposed.

Figure 8 shows the paper conveyance system of a copying machine, etc. equipped with such a large-capacity paper feed stacker.
Publication No. 63).

In the figure, reference numeral 1 denotes a large-capacity paper feed stacker that stores a large amount of 1,000 to 3,000 sheets of paper, and two upper paper feed cassettes that store 500 to 1,000 sheets of paper.

The paper is fed from either the upper or lower paper feed section to the paper feed roller 3A.
Alternatively, the paper is sent out by the synchronous roller 4 which has stopped rotating, is pressed and rotated in synchronization with the rotation of the photosensitive drum 5, and then the toner image is transferred to the paper using a transfer electric mark and then fixed. It is sent to device 7. Here, the toner on the paper is heated and fused and fixed onto the paper. Thereafter, this paper is transferred to a tray 9 or a sorter IO by a conveyor belt 8.
Alternatively, the paper is selectively switched to a double-sided copying device (not shown) and ejected from the copying machine main body.

The large-capacity paper feed stacker is separated from the elevating means 11, the paper storage section guide member 12, and the paper storage section 13. Further, inside the casing of the paper storage section 13, there are a paper bundle lateral surface regulating member (not shown) and a paper advance direction regulating member 1.
4 and a sheet rear surface regulating member 15 are fixedly provided, and a sheet bundle receiving plate 16 on which a sheet bundle is loaded and which can be raised and lowered by the lifting and lowering operation of the elevating means 10 is provided.

The paper rear surface regulating member 15 is a screen-shaped member fixed to the bottom of the casing of the paper storage section 13, and its upper tip extends to the height of the paper feeding surface by the paper feeding roller 3A.

When paper feeding is started, the number of paper stacks decreases as the paper stack is fed out one after another starting from the topmost paper, but the elevating means 11
As a result, the receiving plate 16 is raised, and the height of the uppermost sheet of the stack of sheets is detected and controlled by the detection means so that the uppermost sheet is always maintained at a predetermined feeding surface.

[Problem that the invention seeks to solve]

Here, the uppermost tip of the paper stack is regulated upward by three paper feed rollers or a separation claw (not shown).
Since the other uppermost surface is not regulated in any way, it may roll up, be pushed back by the paper feed roller 3A, or be skewed due to one-sided feeding of the paper feed roller 3A, and the paper rear surface regulation member may 15 and protrudes, the rear surface of the paper becomes uneven, and the stack of paper collapses.

This undesirable paper misalignment causes poor paper feeding (no-feeding or slanted feeding), which prevents normal copying.

[Means to solve all problems]

The present invention is a large-capacity sheet feeding stacker that completely improves the problems in the paper feeding device having all of the rear surface regulating members, and enables accurate and reliable sheet feeding operation by always regulating the entire rear surface of the paper and aligning the paper. The object of the present invention is to provide a complete paper feeding device having the following functions.

The above purpose is to regulate the rear end of a stack of recording sheets stacked on the receiving plate in a paper feeding device equipped with a paper storage section that has a built-in receiving plate that can be raised and lowered to hold a large number of recording papers. This is achieved by a paper feeding device having a recording paper position regulating member, characterized in that the rear surface regulating member arranged in this manner is rotatable around a member integrated with the receiving plate. Furthermore, in a preferred embodiment of the present invention, the rear surface regulating member is biased by a spring and stands upright, and the top of the rear surface regulating member is rotated by being pressed against the lid of the paper storage unit main body. It is characterized by being able to be raised and lowered.

〔Example〕

Hereinafter, the present invention will be explained in detail with reference to Examples.

FIG. 1 is a block diagram of a copying machine equipped with a paper feeding device according to the present invention, and a dashed line with an arrow in the figure indicates a paper conveyance path of the copying machine. Regarding the reference numerals used in these drawings, the same reference numerals are given to the same functional members as in FIG. 8.

In FIG. 1, 20 is a paper storage section for stocking a large amount of 1,000 to 3,000 sheets, 40 is a mounting section on which the paper storage section is placed, 50 is an elevating means, ω is a paper feeding means, Large-capacity paper feeders including these are mainly 300 to 500
It is installed below the paper feed cassette 2 that stores small sheets of paper.

Figure @2 is a cross-sectional view showing a part of the large-capacity paper feeding device and paper feeding conveyance system, and Figure @3 is a perspective view of the paper storage section.

The paper storage section includes an outer box 21 having cutouts at the front and bottom, fixed side plates n, 23 and movable side plates 24, 25 as side regulating members for positioning the paper bundle in the width direction, and an upper part of the outer box 21. A lid body 26 that closes the opening, a receiving plate I on which a bundle of sheets is loaded, and a hinge member 3 integrated with the receiving plate I.
1, and a rear surface regulating member 32 which is rotatable by engaging with the hinge member 31 and regulates the rear end of the sheet bundle.

On the front side of the outer box 21, that is, on the side closer to the paper feeding means,
A notch 21a is provided through which a lifting platform 41 of a lifting means 40 (described later) can pass.

The fixed side plate n, 23 has a side surface that restricts the width direction of the writing, and a bent portion 22A that restricts the forward direction of the paper.
, 23A, and is fixed to the bottom of the outer box 21. Further, the upper portions of the bent portions 22A and 23A are connected to a support member n installed above the cutout portion 21a of the outer box 21.
It is fixed with screws etc.

Further, a movable side plate 24.5 is pivotally mounted above the fixed side plate n, 23, and is swingable. Movable side plate 24
．． The bent portions 24A and 25A of 25 are fixed to the support member 4, and the paper side edge regulating surfaces 24B and 25B are maintained at a predetermined paper width interval. Note that the paper side edge regulating surface 24B,
The extension surface of 25B is a guide surface 24C having a slight inclination angle.
25C is formed.

Both ends of the support member are slidably engaged with the hinge member 4. The hinge member 4 is pivotally attached to the front upper part of the outer box 21 and is rotatable, and the locking member 2 of the lid member 26
9A to swing open and close the lid member 26.

Figure 4 shows the rear regulating member 3 built into the paper storage section.
FIG. 2 is a perspective view of a receiving plate unit 30 consisting of a receiving plate 2, a receiving plate 31, and the like.

The receiving plate 31 is a plate-like member on which a bundle of sheets is loaded, and is formed to have approximately the same size as the sheet size. The receiving plate 31 can be placed on the bottom of the outer box 21 so as to cover the bottom notch of the outer box 21, and can be moved up and down according to the lifting and lowering operation of the lifting means. Note that the rectangular plate on the front upper surface of the receiving plate 31 is a friction member.

On the rear side of the receiving plate 31, the mounting plates are integrally fixed, and one end thereof has a bent portion 33Af, and furthermore, a rotation support shaft 35 is fixedly provided.

On the other hand, the rear surface regulating member 32 is a resin-molded plate-like member, and a through hole is provided at the lower end of the rear surface regulating member 32, and the rotation support shaft 32 is provided with a through hole at its lower end.
4 will fit. Further, 32A is a projection projecting outward from the rear surface regulating member 32. ``Also, 36 is a torque spring, the coil portion of which is wound around the rotation support shaft, and the straight portions at both ends are hooked to the bent portion 33 of the mounting plate and the protrusion 32A. , the rear surface regulating member 32 is rotated counterclockwise by a spring.

Further, the rotation support shaft 3 is located near the center of the rear surface regulating member 32.
4f: An arcuate groove 32B is provided with a center point, and slides on the shaft 35 fixed to the mounting plate 33.

Here, the rotation of the rear surface regulating member 32 is controlled by the circular arc groove 32B.
It comes to an upright state with its lower end pressed against the shaft 35 and stops.

When a downward pressing force is applied to the top portion 32C of the rear surface regulating member 32, the rear surface regulating member 32 swings downward in a clockwise direction about the rotational support shaft 34 while being biased by the spring. In this downward stroke, the shaft 35 is inserted into the arcuate groove 32.
B and comes into contact with the upper end of the arcuate groove 32B and stops, and the rear surface regulating member 32 is at the bottom dead center position. Further, when the pressing force on the top portion 32C is released, the rear surface regulating member 3
2 returns to the upright position again.

Referring again to FIG. 2, below the paper storage section is a loading section 4.
0 is set. The placing section 40 includes a fixed section fixed to the main body of the copying machine and a moving section movable by a rail member. The fixed part is provided with a lifting means blade which will be described later, and the paper storage part is removably mounted and positioned in the moving part.

Lifting means 50, vertical support member 51, motor M1 with a reduction gear attached to the upper part of support member 51, motor M
A lower sprocket 52 is fixed to the rotating shaft of 1, and an upper sprocket 5 is rotatably attached to the upper part of the support member 51.
3. A chain 54 stretched between the upper and lower sprockets 52 and 53, a guide member 55 fixed to the back surface of the support member 51, and a chain 54 that is slidably supported by the guide member 55 and locked to the chain 54. The moving member 56, the moving member 5
6 and a lifting table 57 that moves up and down and comes into contact with the receiving plate 31 of the paper storage member 20. The moving member 56 and the lifting table 57 can be inserted into the notch 21a of the outer box 21 and freely pass through.

The rotational driving force of the motor M1 rotates the chain 54' from the lower sprocket 52, and the chain causes the receiving plate 31 and the rear surface regulating member 32 to move up and down.

A known paper feeding means 60 is provided at the top of the paper feeding device. Here, 61 is a feeding roller, 62 is a separation belt, and 63
A separating member, 64 is a guide plate, 65 is a conveyance roller, and among the above members, rotating or rotating members 61 and 62
, 65 are driven by motor M2.

Next, the operation of the paper feeding device according to the present invention will be explained. FIG. 5 shows a sectional view when the receiving plate 31 of the paper storage section 20 is at the lowest position, FIG. 6 shows a -A-A sectional view when the receiving plate 31 is at the lowest position, and FIG. FIG. 3 is a cross-sectional view of the state where it has reached the highest level.

When replenishing the paper replenishing section or replacing it with another paper, first, the paper storage section 20i placed on the moving section of the mounting table 4o is pulled out to the right side of the copying machine to a stop position. Next, when the lowering button is pressed, the motor M1 between the lifting means rotates and the lifting platform 57 is lowered to the lowest position. Therefore, the receiving plate unit 30 in the paper storage member, which is placed under its own weight on the elevating table 57, simultaneously descends to the lowest position and stops.

Next, if you open the lid 26 of the paper storage member, the movable side plate 24
．． 25 swings upward together with the lid 26, and most of the sides of the paper bundle are left open. In this state, since no external force is applied to the rear surface regulating member 32, it is biased by the torque spring 36 and assumes a substantially upright position. In this state, a stack of sheets to be replenished is placed on the pedestal 31.

After replenishing the paper, close the lid 26. At this time, the movable side plates 24 and 25, one end of which is fixed to a support member portion slidably attached to the lid body 26, are fixed side plates n.

The guide surfaces 24C and 25C, which swing around the entire rotation axis of the upper part and have an inclined angle, regulate both side edges of the paper stack and align the sheets, and then the paper side edge regulating surfaces 24B and 25C move on both sides of the paper stack. Accurately position the stack of paper against the edge.

In this way, when the lid body 26 completely closes the upper opening of the outer box 21, a locking member (not shown) engages, and the lid body 26
Then, the outer box 21 is in a closed state. At the same time, motor M
1, a drive signal is input to start the drive rotation, and the lifting platform 57
is raised, and the top layer of the paper stack on the receiving plate 31 is transferred to the paper feeding means 60.
It is detected and controlled by a detection means (not shown), and the rising is stopped when a predetermined position is reached. At this time, the uppermost layer of the paper bundle is pressed against the paper feed roller 61 and the separation belt 62.

The sheets in the outer box 21 that have been raised to an appropriate height by the elevating means 50 are sent out sheet by sheet by a sheet feed roller 61 and a separation belt 62, which rotate based on a copy start signal, and are sent out one by one by a guide plate 64 and a conveyance roller 65. ．． The image is sent to the photoreceptor drum 5 via the synchronous roller 4, where a copying process is performed.

As the paper is consumed, the paper feed roller 61 in contact with the paper descends, and when it is detected that it has reached a predetermined height, the motor M1 is rotated again based on this detection signal. As a result, the lifting platform 51 and the receiving plate 31 rise. When a predetermined height is reached, the motor M1 stops rotating. This operation continues to be repeated while the paper is being fed.

During the rising process of the receiving plate 31, the rear surface regulating member 32, which contacts and regulates the rear end surface of the paper stack, also rises at the same time, but its top portion 32C abuts against the inner wall surface of the lid body 26 and its rising is stopped. , the top part 32 is lifted by the upward force of the receiving plate 32.
A pressing force is applied to C. When the receiving plate 3] rises further,
The top portion 32C of the rear surface regulating member 32 slides on the inner wall surface of the lid body 26, and its contact point moves to the right, and the rear surface regulating member 32 as a whole rotates clockwise around the rotational shaft 34.

Eventually, when the paper is completely consumed, the paper storage section 20 and the receiving plate unit (9) assume the shape shown in FIG. 7, and the rear surface regulating member 32 is tilted most to the right. In this state, the detection means is activated and the display panel of the main body of the copying machine displays that there is no paper, and the motor M1 begins to rotate in the opposite direction and stops when the elevator platform 57 descends from the lowest position. In this state, paper can be replenished or replaced again.

The inside of the paper storage section is prepared with different paper sizes for each size of paper to be stored. For example, various paper feed trays from A3 size to 85 size paper are prepared for exclusive use, and when a large amount of copying is to be performed on paper of a required size, these dedicated paper feed trays are installed and used on the above-mentioned placement table.

Alternatively, when using one paper feed tray for various sizes of paper, the side plates 22, 23, 24, and 25 can be moved and set, and the receiving plate unit 30 can be prepared in various ways for each paper size. When storing necessary sheets, a dedicated receiving plate unit' may be replaced and loaded into the outer box. In this case, the receiving plates of the various receiving plate units have substantially the same shape as each paper size, and a rear surface regulating member having substantially the same shape as described above is rotatably attached to this receiving plate.

Furthermore, the side plates n and 23 may also be of a movable structure similar to that of the rear surface regulating member instead of being fixed. a rear surface regulating member that allows the receiving plate to be moved up and down by an elevating means and that regulates the rear end of the stack of sheets on the receiving plate. Since it is configured to be able to swing with respect to the receiving plate, the rear end of the sheet bundle is always in contact with the rear face regulating member during the raising or lowering process of the receiving plate by the elevating means. Therefore, the paper bundle does not collapse. In particular, there is an effect that there is no accident in which the upper layer of the paper bundle is shifted by the paper feeding means or the like, or the trailing edge of the paper goes over the entire edge of the rear surface regulating member, resulting in poor paper feeding. Therefore, there is an effect that the paper is fed smoothly and accurately to the main body of the copying machine.

[Brief explanation of drawings]

FIG. 1 is a block diagram of a copying machine equipped with a paper feeding device according to the present invention. Figure 2 is a cross-sectional view of the large-capacity paper feeder and conveyance system.
FIG. 3 is a perspective view of the paper storage section. FIG. 4 is a perspective view of a receiving plate unit built into the paper storage section. Figure 5 is a sectional view of the paper storage section, Figures 6 and 7 are A-
It is an A sectional view. FIG. 8 is a diagram showing the entire paper conveyance system of a copying machine equipped with a conventional paper feeding device. 20...paper storage section 21...outer box n, 23...
... Fixed side plate 24.25... Movable side plate 26... Lid body 30... Receiving plate unit 31... Receiving plate
32... Rear surface regulation member 33... Mounting plate
34... Rotation support shaft 35... Axis 36
...Torque spring 40...Placement part 50...
Lifting means 57... Lifting platform 60... Paper feeding means Applicant: Konishiroku Photo Industry Co., Ltd. Figure 5-A Figure 8

Claims (2)

[Claims] (1) In a paper feeding device equipped with a paper storage section that has a built-in receiving plate that can be raised and lowered with a large number of recording sheets placed thereon, the rear end of the stack of recording sheets stacked on the said receiving plate is regulated. 1. A paper feeding device having a recording paper position regulating member, characterized in that a rear surface regulating member disposed on the recording paper position regulating member is rotatable around a member integrated with the receiving plate. (2) The rear surface regulating member is biased by a spring and stands up, and the top of the rear surface regulating member is rotated and can be raised and folded by pressing against the lid body of the paper storage section main body. A paper feeding device having a recording paper position regulating member according to claim 1.