JPH05186066A - Paper sheet feeder for image forming device to regulate movement of paper sheet when package sheet is removed - Google Patents

Abstract

PURPOSE:To provide a paper sheet feeder for an image forming device by which a paper sheet feeding operation can be simplified significantly. CONSTITUTION:After a paper sheet pack 20 is installed in a paper sheet feed position automatically by means of a conveyor roller 8, package sheets 20A and 20B of the paper sheet pack 20 are removed automatically by means of a pack opening device 2. When a tongue piece 21 is pulled by means of the pack opening device 2, the movement of the paper sheet pack 20 in the tongue piece 21 pulling direction is regulated by means of a back fence 10.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a sheet feeding device of an image forming apparatus such as a copying machine or a facsimile machine which regulates the movement of a sheet when removing a packaging sheet, and more particularly to feeding a sheet loaded in a main body together with a sheet pack. The present invention relates to a paper feeding device for paper.

[0002]

2. Description of the Related Art In a paper feeding device of an image forming apparatus such as a copying machine which is widely used, paper is replenished manually.

Normally, the paper supply operation is as follows: Draw out (withdraw) the cassette (tray) from the paper feeder. Remove the cassette top cover 3. Open the packaging of the paper pack 4. 4. Lift the paper pressing member (corner claw) inside the cassette. Align the paper taken out from the pack 6. Attaching the paper to the cassette 7. 7. Place the paper pressing member on the loaded paper. The cassette (tray) is attached to the paper feeding device and other processes.

However, in such a sheet feeding device, as described above, a large number of sheet replenishing operation steps are required, and especially for a user who uses a large amount of sheets, the work is extremely troublesome and time consuming. It was a thing.

For this reason, there has already been proposed a paper feeding device in which a predetermined number of sheets of paper are packaged and loaded as they are in a paper feeding device main body, which is opened by a mechanism inside the device and fed.

[0006] For example, in Japanese Patent Laid-Open No. 63-203534, a stack of sheets, each of which is wrapped by a predetermined number of packaging sheets, is stacked in multiple stages, and one sheet of the bundle is advanced with a cutter. The left and right sides are cut, the upper and lower surfaces of the cut packaging sheet are adsorbed and opened, and the opened sheet bundle is sandwiched and placed on a conveyance table, and then the sheet bundle is conveyed. There has been proposed an unsealing and stacking method and apparatus for packaging sheets, which are transported to a mounting position and stacked by moving a table.

Further, in Japanese Patent Laid-Open No. 60-97145, a paper wrapping material is formed into a box shape with a strong material such as cardboard and resin, and a portion on which a feeding roller, a separating claw and the like come into contact is formed. A technique has been proposed in which the box-shaped member is used as a cassette for paper feeding by separating the box-shaped member from the box-shaped member and then mounting the box-shaped member at the paper feeding position of the image forming apparatus main body.

[0008]

However, in the former of the above-mentioned conventional techniques, the packaging sheet is cut with a cutter, and the upper and lower surfaces of the cut packaging sheet are adsorbed and opened. According to the paper, even the packaged paper may be cut by the cutter. This is a fatal defect for a sheet used in an image forming apparatus such as a copying machine. Moreover, since the suction mechanism is used to open the packaging sheet, the size of the device is increased, and there is a problem in terms of noise.

Further, in the above-mentioned apparatus, the opened sheet bundle is nipped and placed on the carrier, and then the sheet bundle is conveyed to the stacking position by the movement of the carrier and stacked. The sandwiching and conveying of the opened sheet bundle disturbs the stacking state of the sheet bundle, and in some cases, the sheet bundle may be scattered.

Further, in the latter case, since the paper packaging material (box-shaped member) is used as a cassette for paper feeding, it is necessary to use a strong material such as cardboard or resin.
The above-mentioned materials are generally expensive, and are disadvantageous in that they are expensive and not versatile as a sheet storage member for use in a copying machine or the like that only stores hundreds of sheets of paper.

Further, the box-shaped member has perforations for cutting off the leading end portion, but when the paper is stored for a long period of time, the paper is exposed to the outside air through the perforations and absorbs moisture, thus forming an image. May adversely affect.

In addition, the box-shaped member inevitably has a part thereof protruding out of the apparatus from the viewpoint of attachment / detachment to / from the apparatus body. This is contrary to the recent demand for space saving in copying machines and the like.

SUMMARY OF THE INVENTION It is an object of the present invention to solve the above-mentioned drawbacks of the conventional apparatus and to provide a sheet feeding apparatus of an image forming apparatus which regulates the movement of the sheet when removing the packaging sheet, which can remarkably simplify the sheet replenishing operation. To do.

[0014]

The above-mentioned object is to sandwich a sheet feeding device main body and a projecting portion provided at one end of a packaging sheet of a sheet pack placed at a sheet feeding position in the sheet feeding device main body. ,
A packaging sheet removing means for pulling the packaging sheet in the projecting direction of the projecting portion to remove the packaging sheet of the paper pack, and a placement device on which the paper package is placed between the paper pack and the packaging sheet removing means. This is achieved by the first means having a predetermined gap between the surface and a movement restricting means for restricting the movement of the sheet in the pulling direction of the protruding portion when the packaging sheet removing operation is performed by the packaging sheet removing means.

Further, the above object is to provide an elastic member on the placement surface side at the lower part of the movement restricting means, at least a part of which the projecting portion of the packaging sheet does not oppose when the paper pack is placed at the feeding position. This is achieved by the second means projecting toward.

[0016]

According to the present invention, the paper pack inserted by the user is automatically mounted at the paper feed position in the main body of the paper feeder by the paper pack conveying means, and then the paper pack is removed by the packaging sheet removing means. The packaging sheet was automatically removed. Further, in the first means, the movement of the paper pack in the pulling direction of the protruding portion is restricted by the movement restricting means (back fence) of the paper feeding portion when the protruding portion is pulled by the packaging sheet removing means, and the lower portion of the back fence is fed. The packaging sheet is passed through a gap provided between the packaging sheet and the paper tray.

In the second means, at least a part of the lower portion of the back fence where the projecting portions of the packaging sheet do not face each other is provided with a sheet rear end regulating elastic member such as mylar so as to project toward the sheet feeding tray. This prevents the trailing edge of the paper from passing through the above gap and escaping to the opposite side of the paper feed direction, especially when the leading edge of the paper is raised by the bottom plate when the remaining amount of paper is low. is doing.

[0018]

Embodiments of the present invention will be described below with reference to the drawings.

FIG. 1 is a block diagram of an image forming apparatus according to an embodiment of the present invention, which comprises a copying machine main body A having a well-known structure and a fully automatic paper feeder B according to the present invention.

In the paper feeding device B, 1 is a trash box for storing a pack of paper, 2 is a pack opening device for opening a paper pack, 3 is an entrance guide plate, 4 is a drive motor for a conveyance roller which will be described later, and 5 is a drive motor. 4 is a drive shaft, 6 is a tray for stacking sheets, 7 is a side fence provided in plural according to the size of the sheet in order to regulate the side edge of the sheet on the tray 6, and 8 is the sheet conveyed in the width direction. A feeding roller 9 for feeding a sheet of paper toward the main body of the copying machine, and a back fence 10 for regulating the trailing edge of the sheet.

FIG. 2 is a perspective view of the paper feeding device. Paper insertion ports 11, 12, and 13 are provided on the front side (front side of the copying machine) for A5, A4, and A3, respectively.
Insert the paper pack 20 shown in
The right side of 3 is set to the reference position, and the tongue piece 21 is set to the left side, and the sheet is inserted into the corresponding places of the sheet insertion ports 11, 12, 13. At this time, the doors 31, 32, and 33 of the respective sheet insertion ports shown in FIGS. 4 to 7 guide the sheet pack 20. For example, A4 size paper pack 2
When inserting 0 into paper insertion slot 12, insertion slot 1 for A3
Since the door 33 of No. 3 does not open, it is possible to guide the paper pack 20 so as not to shift laterally. Further, as shown in FIG. 5, the door (the door 31 is illustrated) is automatically returned to its original position by the spring 34 after the paper pack 20 is inserted.

In this embodiment, the sheet insertion ports for A5, A4 and A3 are provided, but as shown in FIG. 7, it is possible to deal with the B row by increasing the division position. Further, as shown in FIGS. 8 and 9, a slide type guide piece 36 is provided in a slide groove 35 of a door (shown by the door 31), and the guide piece 36 is moved to the left and right according to the size of the sheet to You may make it guide an edge part. In FIG. 2, 14a is a pack opening device drive motor, 14b is a back fence drive motor, and 15 is a screw (male screw) attached to this motor shaft.

FIG. 10 is a perspective view showing an example of the paper pack detection mechanism. For example, a bar code reader 40 is provided at the right reference position of the paper insertion opening (showing the paper insertion opening 11), and the paper packing is detected. By reading the bar code 41 provided on one side surface of the sheet 20, the entry of the sheet pack 20 is detected.

FIG. 11 is a perspective view of the carrying roller portion, and FIG. 12 is an explanatory view showing how the paper pack enters and the carrying roller rotates.

The conveying roller 8 is usually positioned above the sheet insertion port so as not to obstruct the entrance of the sheet pack 20. In the figure, 51 is a drive gear that rotates integrally with the drive shaft 5, 52 is an arm that rotates around the drive shaft 5,
Numeral 3 is a planetary gear attached to the tip of the arm 52 and meshes with the drive gear 51, and numeral 54 is a driven roller made of a low friction member provided for smoothly conveying the paper pack 20. Note that a plate-shaped Teflon sheet, for example, may be used instead of the roller.

As shown in FIG. 12, when the drive gear 51 is rotated in the counterclockwise direction, the conveying roller 8 provided coaxially with the planetary gear 53 rotates in the counterclockwise direction together with the arm 52 and moves upward (indicated by a broken line). Position), and the paper pack 20
When the drive gear 51 is rotated in the clockwise direction, the transport roller 8 also rotates in the clockwise direction and drops onto the upper surface of the paper pack 20. The rotation of the drive gear 51 causes the transport roller 8 to rotate counterclockwise and transport the paper pack in the arrow direction.

FIG. 13 is a block diagram showing an example of the pseudo load member of the conveying roller 8, FIG. 14 is a block diagram showing another example thereof, and FIG. 15 is a vertical sectional view of the pseudo load member shown in FIG.

When a pseudo load is applied by frictional force,
As shown in FIG. 13, a friction member 55 such as a cork or a felt is urged against the planetary gear 53 by a coil spring 56 to generate a frictional force on the side surface of the planetary gear 53 to apply a load.

When a dummy load is produced by using the damper, as shown in FIG. 14, the damper 57 is attached to the rotating portion of the planetary gear 53 and the arm 52 is attached by the fixing screw 58. For the damper 57, for example, a hydraulic damper, a powder torque limiter, or the like is used.

FIG. 15 shows the structure of the hydraulic damper. 6 in the figure
Reference numeral 0 is a rotary shaft directly connected to the planetary roller, and a vane wheel is formed at its end. Reference numeral 61 is a seal member for preventing liquid leakage, and 62 is a cover in which viscous oil 63 is filled.

As shown in FIG. 12, when the conveying roller 8 comes into contact with the paper pack 20, the pseudo load member starts to slide. As a result, the transport roller 8 that has been rotating together with the drive gear 51 starts rotating, and the paper pack 20 is further transported into the mechanism. At this time, if the packs other than the dedicated packs can be identified by the bar code label of the paper packs 20 and the like, when the packs other than the dedicated packs are inserted, the transport roller 8 is reversed to eject the paper packs. can do.

FIG. 16 is a perspective view of the side fence moving mechanism, and FIG. 17 is a perspective view showing a state where the side fence is tilted.

As shown in FIG. 16, the side fence drive motor 70 (the gear portion thereof) is provided with the side fence 7 on the front side.
When the rack 71 of a and the rack 72 of the rear side fence 7b are engaged with each other, when the fence drive motor 70 is rotated, both side fences 7a and 7b move toward and away from each other.

When the sheet pack 20 enters the main body, as shown in FIG. 17, the front side side fence 7a is closed.
Is pushed by the paper pack 20 and falls to the back side to facilitate the entrance of the pack. By the way, the side fence 7 and the back fence 10 move to the retracted position (maximum size) when the paper presence sensor detects the absence of paper. The transport roller 8 is located on the back side of the side fence 7, while the side fence 7a is retractable and can be restored by a spring, so that the final end of the paper pack 20 exceeds the side fence 7a. Then, the side fence 7a rises to its original position. After the side fence 7a gets up and rises,
The side fence 7 is moved by the side fence drive motor 70 to the center which is the transport reference position of the paper pack 20.

After the alignment by the side fence 7 is completed, the alignment by the back and forth direction is performed by the back fence 10. In this case, since the paper size is known when the side fence is moved, the movement amount of the back fence 10 is determined based on this data.

FIG. 18 is a perspective view of the back fence moving mechanism, and FIG. 19 is a perspective view near the back fence and the pack opening device.

Since the back fence 10 and the pack opening / closing device 2 are provided with a female screw for screwing with the screw 15, both can be moved by rotating the drive motor 14. In FIG. 18, reference numeral 80 is a bearing.

FIG. 20 is a side view showing the positional relationship between the back fence and the bottom of the paper pack storage portion, and FIG. 21 is a front view of the same.

Since the back fence 10 also serves as a paper retainer when the paper pack 20 is opened, the bottom end of the back fence 10 and the bottom surface of the paper pack storage portion (paper loading surface) 8
A gap 83 is provided between the tongue piece 1 and the tongue piece 21 of the sheet pack 20. Furthermore, from the gap 83
The opened sheet is the packaging sheet 20A of the sheet pack 20,
A barrier 82 is provided below the back fence 10 using a soft material such as mylar so as not to come out with the 20B.

Returning to FIG. 19 again, the tongue piece 21 projects to the rear side of the back fence 10 when the back fence 10 is stopped. At the same time as the back fence 10 moves, the pack opening device 2 moves and puts the rubber-coated magnet roller 90 on the tongue 21 and stops. 91 is a drive shaft for driving the magnet roller 90,
Reference numeral 92 is a drive motor, and 93 is a worm gear.

The pack opening device 2 is mainly composed of a magnet roller 90 and a drive shaft 91, and is set so as to be biteable when driven in the pack opening direction. Therefore, when the required torque for opening the pack is increased, the pressure applied to the tongue 21 of the magnet roller 90 is also increased, and as a result, the carrying force is increased. The magnet roller 90 may have a structure divided into a plurality of parts. In addition to the entrance guide plate 3 provided on the roller portion, the tongue piece 21 is provided.
Tongue 2
When the 1 contacts the magnet roller 90, this roller is lifted and thus facilitates the entry of the tongue 21.

Here, the paper pack 20 will be described.

FIG. 22 is a development view of the packing sheet for the paper pack, FIG. 23 is a schematic view of the opening process of the paper pack, and FIG.
(A), (b) is explanatory drawing of an adhesion part, FIG.25 (a)-.
26C and FIGS. 26A to 26C are explanatory views of the packaging process. One packaging sheet 20A, 20B is made of two sheet materials having different strengths, and the packaging sheet 20A having the larger strength is shown. The part is each plate part 20a, 20b, 20c, 20
d, 20e, 20f, 20g, 20h, and a tongue piece 21 integrated with the packaging sheet 20A portion. The tongue piece 21 is reinforced with mylar or the like so as not to be bent.

In the packaging, as shown in FIG. 25 (a), the upper left is used as a reference for clockwise rotation, and as shown in FIG. 25 (b), a portion of one turn is adhered to the reference end portion.
See (a). After that, as shown in FIG. 25 (c), it is wound in the opposite direction (counterclockwise), and when the tongue piece 21 reaches the reference diagonal position, the winding ends and the adhesive is applied as shown in FIG. 24 (b). Finally, the side surfaces of FIGS. 26 (a), (b), and (c) are folded inward and adhered.

At the time of opening, by pulling the tongue piece 21, the adhesive portion at the reference position is first peeled off as shown in FIGS. 23 (a) and 23 (b), and the strength is varied by further pulling. The two wrapping sheets 20A and 20B are cut at the boundary position and opened. 3 and 23 (a)-
The state is shown in (d).

FIG. 27 is an explanatory diagram for calculating the length of the tongue piece, and the length of the tongue piece 21 is determined by the relationship between the magnet roller 90 and the back fence 10.

That is, L1 is the distance from the center of the magnet roller 90 to the back fence 10, L2 is the thickness of the back fence 10, L3 is the length of the tongue 21, and L3 is L3.
Due to the condition .gtoreq.L1 + L2, when the back fence 10 hits the rear end of the paper pack 20, the tongue 21 is located under the magnet roller 90, so that the tongue 21 can be reliably pulled.

FIG. 28 is an overall control block diagram, and the programs for performing various controls according to the present invention are ROM 100 and RA.
It is executed by the M101 and the CPU 102. CPU10
The bus 2 receives information from the sensor group 104 including S1 and S2 via the bus 103 and controls the motor group 105 including M1 and M2. Examples of the sensor include a paper presence detection sensor and a paper pack detection sensor. Further, as the motor, there are a transport motor for the paper pack 20, a pack opening device moving motor, and the like. 106 is an I / O port, 107 is a motor current detection circuit, and 108 is a motor drive circuit.

The locking mechanism of the door will be described with reference to FIGS. 29 to 31.

29 and 30 are a perspective view and a front view showing one example thereof, and FIG. 31 is a front view showing another example.

Only when the paper end detecting filler 110 shown in FIG. 31 is lowered and the paper end is detected,
The solenoid 111 is turned on to retract the door lock member 112, and the door (representative of the door 31) can be opened and closed (examples in FIGS. 29 and 30). Further, in the example of FIG. 31, the door lock filler 113 is similarly opened and closed.

This also applies to the paper feed cassette. That is, as shown in FIG. 32, the door lock member 112 at the front end of the solenoid 111 is freely retractable from the side wall of the paper feed cassette 120, and only when the paper feed cassette 120 is at the paper end. Can be taken out.

FIG. 33 shows a flow chart for the overall control (paper pack automatic opening control). First, the paper feed cassette 120 is used.
It is determined whether or not there is paper inside (S1), and if there is, the doors 31 to 33 are locked so that the paper pack 20 cannot enter. Alternatively, the conveyance control is not performed even when the paper pack 20 is inserted.

When there is no more paper in the paper feed cassette 120, first, a preparation operation is started in preparation for the insertion of the paper pack 20. That is, back fence 10 and side fence 7
Is moved to the retracted position, and the bottom plate 6 is lowered. During this time, the locked state of the doors 31 to 33 is still maintained so that the paper pack 20 cannot be inserted.

Here, the retract position of the back fence 10 is outside the drawing portion of the sheet feeding cassette 120 (or the tray 6), and the retract position of the side fence 7 is outside the maximum paper size.

When the preparation for insertion is completed, the doors 31 to 33 are unlocked, and the inserted paper pack 20 is carried into the tray 6 or the paper feed cassette 120 to detect the paper size (S3). ) Is executed. If there is no transport error (NO in S4), the pack opening control subroutine (S5) is executed, and further the paper set subroutine (S6) is executed.

[0057]

As described above, according to the present invention,
After the paper pack inserted by the user is automatically mounted at the paper feed position in the main body of the paper feeder by the paper pack transport means,
Since the wrapping sheet removing means automatically removes the wrapping sheet of the paper pack, the paper supply operation can be significantly simplified.

According to the first and second aspects of the present invention, the movement of the sheet pack in the pulling direction of the protruding portion is regulated by the back fence of the paper feeding unit when the protruding portion (tongue piece) is pulled by the packaging sheet removing means. However, by passing the packaging sheet through the gap provided between the lower portion of the back fence and the paper feed tray, the back fence and the movement regulating means for regulating the movement of the paper pack are also used, and the configuration is simplified,
It is possible to remarkably improve the paper supply property.

According to the third aspect of the present invention, the sheet trailing edge regulating elastic member such as mylar is directed toward the bottom side of the sheet feeding tray on at least a part of the lower portion of the back fence where the projecting portions of the packaging sheet do not face each other. When the paper is fed, especially when the amount of remaining paper is low and the leading edge of the paper is raised by the bottom plate, the trailing edge of the paper passes through the gap and is on the opposite side of the paper feeding direction. It is possible to prevent the problem of running away.

[Brief description of drawings]

FIG. 1 is a configuration diagram of an entire copying machine according to an embodiment of the present invention.

FIG. 2 is a perspective view of the sheet feeding device according to the embodiment of the present invention.

FIG. 3 is a perspective view showing a sheet pack and an opening process thereof.

FIG. 4 is a perspective view of a door of a sheet insertion port.

FIG. 5 is an enlarged perspective view of a sheet insertion port door.

FIG. 6 is a top view of a door of a sheet insertion port.

FIG. 7 is a perspective view showing a state in which a sheet pack is inserted into a sheet insertion port.

FIG. 8 is a perspective view showing another example of the door.

FIG. 9 is a top view showing another example of the door.

FIG. 10 is a perspective view showing an example of a paper pack detection mechanism.

FIG. 11 is a perspective view of a transport roller unit.

FIG. 12 is an explanatory diagram showing a state in which a sheet pack enters and a transport roller rotates.

FIG. 13 is a configuration diagram illustrating an example of a pseudo load member of a transport roller.

FIG. 14 is a configuration diagram showing another example of the pseudo load member of the transport roller.

FIG. 15 is a vertical sectional view of the pseudo load member shown in FIG.

FIG. 16 is a perspective view showing a side fence moving mechanism.

FIG. 17 is a perspective view showing a state where the side fence has fallen down.

FIG. 18 is a perspective view of a back fence moving mechanism.

FIG. 19 is a perspective view of a back fence and a pack opening device portion.

FIG. 20 is a side view showing the positional relationship between the back fence and the bottom surface of the paper pack storage portion.

FIG. 21 is a front view showing the positional relationship between the back fence and the bottom surface of the paper pack storage portion.

FIG. 22 is a development view of a packing sheet for a paper pack.

FIG. 23 is a schematic view of the process of opening the paper pack.

FIG. 24 is an explanatory diagram of a bonded portion.

FIG. 25 is an explanatory diagram of a packing process of the paper pack.

FIG. 26 is an explanatory diagram of a packing process of the paper pack.

FIG. 27 is an explanatory diagram of calculating the length of a tongue piece.

FIG. 28 is an overall control block diagram.

FIG. 29 is a perspective view showing an example of a locking mechanism of a door.

FIG. 30 is a front view showing an example of a door locking mechanism.

FIG. 31 is a perspective view showing another example of the locking mechanism of the door.

FIG. 32 is a perspective view showing a locking mechanism of the paper feed cassette.

FIG. 33 is an overall control flow chart.

[Explanation of symbols]

 1 Trash Bin 2 Pack Opening Device 4 Drive Motor 6 Tray 7 Side Fence 8 Conveying Roller 9 Feeding Roller 10 Back Fence 11, 12, 13 Paper Insertion Port 14a Pack Opening Device Drive Motor 14b Back Fence Driving Motor 20 Paper Pack 20A, 20B Packaging Sheet 21 Tongue Piece 31, 32, 33 Door 36 Guide Piece 51 Drive Gear 53 Planetary Gear 54 Driven Roller 70 Side Fence Drive Motor 81 Storage Bottom (Paper Placement Surface) 82 Barrier 83 Gap 90 Magneto Roller 100 ROM 101 RAM 102 CPU 103 Bus 104 Sensor Group 105 Motor Group 110 Paper End Filler 111 Solenoid 112 Door Lock Member 113 Door Lock Filer 120 Paper Feeding Cassette

─────────────────────────────────────────────────── ─── Continuation of the front page (51) Int.Cl. ⁵ Identification number Reference number within the agency FI technical display location H04N 1/00 108 C 7046-5C (72) Inventor Kenshi Yamakawa 1-3 Nakamagome, Ota-ku, Tokyo No. 6 in Ricoh Company (72) Inventor Masaru Shiina 1-3-3 Nakamagome, Ota-ku, Tokyo In-house Ricoh Company (72) Keisuke Hayashi 1-3-3 Nakamagome, Ota-ku, Tokyo Shares Company Ricoh

Claims (3)

[Claims] 1. A sheet feeding device main body and a projecting portion provided at one end of a packaging sheet of a paper pack placed at a sheet feeding position in the sheet feeding device main body are sandwiched, and the projecting portion is provided in a projecting direction of the projecting portion. A wrapping sheet removing means for pulling the wrapping sheet to remove the wrapping sheet of the paper pack, and a predetermined distance between the paper pack and the placing surface on which the paper pack is placed, between the paper pack and the wrapping sheet removing means. An image for restricting the movement of the sheet at the time of removing the packaging sheet, which is provided with a movement regulation means for forming a gap and for regulating the movement of the sheet in the pulling direction of the projecting portion at the time of the operation for removing the packaging sheet by the packaging sheet removing means. Paper feeder of forming machine. 2. The movement restriction means according to claim 1, wherein the movement restriction means also serves as an edge restriction means for restricting the edge position of the paper at the time of feeding the paper. A sheet feeding device of the image forming apparatus to be regulated. 3. The elastic member according to claim 1, wherein an elastic member is mounted on at least a part of the lower portion of the movement restricting means, which is not opposed by the projecting portion of the packaging sheet when the sheet pack is placed at the sheet feeding position. A sheet feeding device of an image forming apparatus that regulates movement of a sheet at the time of removing a packaging sheet, which is provided so as to project toward a placement surface side.