JPH06227688A - Paper feeding device for paper pack loading - Google Patents

Abstract

PURPOSE:To provide a paper feeding device for paper pack loading capable of simplifying paper sheet supplying movement, smoothly and speedily peeling a packaging sheet, not damaging a paper sheet inside, not generating noise and not making a rent of a paper pack expensive. CONSTITUTION:After a paper pack 20 inserted into a paper sheet feeding device from sheet insertion ports 11, 12, 13 is carried to a central position by a carrier roller 8, in the state where the rear end of the paper pack is held by a back fence 10 on an end surface in the upstream, a pack opening roller 2 supported on the rear edge part of the back fence 10 free to rotate opens the paper pack by pulling the paper pack inserted between sheet loading surfaces by way of making contact with tongue pieces 21 of packaging sheets 20A, 20B packing the paper pack with pressure.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a paper pack loading paper feeding device for an image forming apparatus such as a copying machine or a facsimile machine, and more particularly, a paper pack for a paper pack loaded in the main body automatically. The present invention relates to a paper pack loading paper feeder that can feed removed and exposed paper sheet by sheet.

[0002]

2. Description of the Related Art In a paper feeding device of an image forming apparatus such as a copying machine which has been widely spread, all paper feeding operations are performed manually. That is, normally, the sheet replenishing operation of the sheet feeding device includes the following working steps. 1. 1. Pull out (pull out) the paper feed cassette (tray) from the paper feed device. Remove the top cover of the paper cassette 3. Open the paper pack packaging. 4. 4. Align the paper taken out from the paper pack. 5. Lift the paper pressing member (corner claw) inside the paper cassette. Load paper into cassette 7. 7. Place the paper pressing member on the loaded paper. Attaching the Paper Feed Cassette (Tray) to the Paper Feed Device As described above, in the paper feed device, a large number of paper supply operation steps as described above are required, and especially for a user who uses a large amount of paper. The work was extremely troublesome and time-consuming. Therefore, there has already been proposed a paper feeding device in which a paper pack in which a predetermined number of sheets are packed together is loaded into the paper feeding device main body as it is, and the mechanism inside the device opens the package to feed the paper. For example, in Japanese Patent Laid-Open No. 63-203534, a stack of sheets, each of which is wrapped with a predetermined number of packaging sheets, is stacked in multiple stages, and the left and right side surfaces of the packaging sheets are cut by a cutter while advancing one stage. After cutting, the upper and lower surfaces of the cut wrapping sheet are vacuum-sucked to open the wrapping sheet, and the opened sheet bundle is nipped and placed on the carrier, and then the sheet bundle is carried. There has been proposed an unsealing and stacking method and apparatus for packaging sheets, which are conveyed by the movement of the sheet to a mounting position and stacked.
Further, in Japanese Patent Application Laid-Open No. 60-97145, a paper wrapping material is made of a cardboard, a resin, or other strong material into a box shape.
Proposes a technology to use the box-shaped packaging material as a cassette for feeding by mounting the feeding roller and separating claw etc. at the paper feeding position of the main body of the image forming device after separating it from the box-shaped packaging material. Has been done.

[0003]

However, in the above-mentioned prior art, the former method employs a method in which the cutter cuts the packaging sheet and the upper and lower surfaces of the cut packaging sheet are adsorbed and opened. Even the wrapped paper may be cut by the cutter.
Such paper cutting is a fatal defect for an image forming apparatus such as a copying machine that forms an image on paper. In addition, since the suction mechanism is used to open the packaging sheet, the device becomes large in size, mechanical noise is generated, and there is a problem in the office environment. Furthermore, after opening, the opened bundle of paper is nipped and placed on the transport table, and then the sheet of paper is transported to the stacking position by the movement of the transport platform and stacked, so that the opened bundle of paper is sandwiched and transported. In the process, the stacked state of the sheet bundle may be disturbed, and in some cases, the sheet bundle may be scattered. Further, in the latter, since the box-shaped packaging material of paper is used as a paper feeding cassette, it is necessary to form the packaging material with a material having high strength such as cardboard and resin, but since these materials are generally expensive, A paper storage member that stores hundreds of sheets of paper to be used in a copying machine or the like and is discarded after use has a drawback that the cost is high and it is not economical. In addition, perforations for cutting are provided at the tip of the box-shaped packaging material, but when the paper is stored for a long time, the humidity of the outside air penetrates through the perforations and the paper absorbs the humidity. In some cases, it may adversely affect the image formation on the paper. Further, the box-shaped packaging material inevitably has a structure in which a part of the box-shaped packaging material protrudes outside the apparatus in consideration of the attachment / detachment to / from the apparatus main body, which is contrary to the recent demand for space saving in copying machines and the like. . The present invention solves the above-mentioned drawbacks of the prior art, remarkably simplifies the paper supply operation, allows the packaging sheet to be peeled off smoothly and quickly, and can damage the internal paper and generate noise. In addition, it is an object of the present invention to provide a paper pack loading paper feeding device in which the usage fee of the paper pack is not expensive.

[0004]

In order to solve the above-mentioned problems, the present invention is a package which is wound at least one round by a packaging sheet and is pulled out to one end side of a paper pack partially adhered by an adhesive. A pulling means for peeling the packaging sheet from the paper pack by pressing it against the pull-out end of the sheet and carrying it by friction, and supporting the pulling means on the downstream side, while the pulling means pulls the packaging sheet, the upstream side It has a holding means for holding the paper pack in a fixed position at the edge portion, and a paper feeding means for feeding the sheets of the sheet bundle exposed by peeling the packaging sheet by the pulling means one by one.

[0005]

The pulling means peels the packaging sheet from the paper pack by pressing it against the pull-out end of the packaging sheet and carrying it by friction. The holding means supports the pulling means on the downstream side, and holds the paper pack in place at the upstream edge while the pulling means pulls the packaging sheet. The sheet feeding unit feeds the sheets of the sheet bundle exposed by peeling the packaging sheet by the pulling unit one by one.

[0006]

Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 is a block diagram showing the outline of a copying machine according to an embodiment of the present invention. The copying machine reads an image of a document and forms an image on a fed sheet according to an electrostatic photography process, and an image forming section A having a well-known structure, and a sheet feeding section B which is capable of fully automatic feeding with a sheet pack. It consists of Since the configuration and operation of the image forming unit A are the same as those of the conventional one, the description thereof will be omitted, and only the configuration and operation of the sheet feeding unit B will be described.
In FIG. 1, 1 is a dust box for storing the opened packing sheet of the paper pack, 2 is a pack opening roller which is integrally provided at a rear portion of a back fence described later, and peels the packing sheet of the paper pack, and 4 is a conveyance described later. A roller drive motor, 5 is a drive shaft of the drive motor 4, 6 is a paper feed tray on which sheets are stacked, 7 is provided in plural according to the paper size of the paper, and side edges of the paper on the paper feed tray 6 are arranged. A side fence for regulating, a conveying roller 8 for conveying the paper in the width direction, a feeding roller 9 for feeding the paper toward the image forming section A, and a back fence 10 for regulating the rear end of the paper of the paper pack. .

FIG. 2 shows a paper feed section B as seen from the right front side of the copying machine.
FIG. On the front side (front side) of the copying machine, sheet insertion ports 11, 12, and 13 of the sheet pack are provided for A5 size, A4 size, and A3 size, respectively.
The right end of each sheet insertion port 11, 12, 13 is set to the reference position at the corresponding position of the sheet insertion port 11, 12, 13, and
The tongue piece 21 of the paper pack is placed on the left side, and the paper pack 20 whose perspective view is an opening process is inserted in FIG. In FIG. 2, 14 is a pack opening drive motor that drives the pack opening roller 2, and 15 is a support rod that supports the back fence 10. Doors 31, 32, and 3 shown in the perspective views or cross-sectional views in FIGS. 4 to 6 correspond to the paper insertion ports 11, 12, and 13 in the paper insertion ports 11, 12, and 13, respectively.
3 is provided, and the doors 31, 32, 33 guide the paper packs 20 inserted in the respective paper insertion openings (11, 12, 13) into the main body of the paper feed section B. For example, when the A4 size paper pack 20 is inserted into the paper insertion opening 12, the door 3
Since only 1, 32 can be opened and the door 33 of the A3 size insertion opening 13 is not opened, the paper pack 20 can be guided so as not to shift backward. Furthermore, FIG.
As shown in the perspective view of FIG. 3 as an example of the supporting portion of the door 31, the door 3 is inserted by the spring 34 after the paper pack 20 is inserted.
1, 32 and 33 automatically return to their original vertical orientations. In this embodiment, the doors 31, 3 are associated with the paper insertion openings 11, 12, 13 for A5, A4, and A3 paper sizes.
2 and 33 are provided, but as shown in the perspective view of FIG.
It is also possible to deal with B-series sheets by increasing the division position of the sheet insertion port. Alternatively, as shown in the perspective view of FIG. 8 and the vertical cross-sectional view of FIG. 9, for example, a sliding groove 35 is provided in the center part left and right direction of the door 31, and a guide piece 36 is fitted into the sliding groove 35 to guide the sliding groove 35. You may make it restrict | limit the paper edge part of the paper pack 20 by moving piece 36 right and left according to a paper size. FIG. 10 is a perspective view showing the type detection operation of the paper pack 20 of the paper pack detection mechanism provided near the paper insertion opening 11. Paper insertion slot 1
A reflection type sensor 40 is provided in the vicinity of the reference position on the right side of the paper pack 1.
The type of the paper pack 20 is detected by reading the bar code 41 provided on one side surface.

FIG. 11 is a perspective view of the drive mechanism of the transport roller 8, and FIG. 12 is an explanatory view showing a state of the press contact of the transport roller 8 with respect to the paper pack 20 having entered. In these figures, 51 is a drive gear that rotates integrally with the drive shaft 5, and 5
2 is an arm rotatable about the drive shaft 5, 53 is a planet gear that is attached to the tip of the arm 52 and meshes with the drive gear 51, and 54 is provided at a position facing the transport roller 8,
It is a driven roller formed of a low friction member to smoothly convey the paper pack 20. The transport roller 8 is located above the paper entry path so as not to obstruct the entry of the paper pack 20 when refilling the paper. The driven roller 54 is not a roller but a plate-shaped member,
For example, a Teflon (trade name) sheet may be used. As shown in FIG. 12, when the drive gear 51 is rotated in the counterclockwise direction, the transport roller 8 provided coaxially with the planetary gear 53 rotates in the counterclockwise direction together with the arm 52 and moves upward as shown by a broken line. Position, paper pack 2
When the drive gear 51 is rotated in the clockwise direction so as not to obstruct the entry of 0, the transport roller 8 also rotates in the clockwise direction and drops onto the upper surface of the paper pack 20. When the drive gear 51 rotates in the clockwise direction, the transport roller 8 rotates in the counterclockwise direction and transports the contacted paper pack 20 in the arrow (right) direction.

FIG. 13 is a block diagram showing a pseudo load mechanism of the transport roller 8, FIG. 14 is a block diagram showing a modification thereof, and FIG.
[FIG. 8] is a vertical sectional view of a damper of the modified example. As shown in FIG. 13, the coil spring 56 presses the friction member 55 formed of cork, felt, or the like against the planet gear 53 to generate a sliding friction force on the side surface of the planet gear 53, and to cause the conveyance roller 8 to move. Give a load. Further, as shown in FIG. 14, in the modified example, the damper 57 is attached to the arm 52 by the fixing screw 58, and the rotating shaft of the planetary gear 53 is connected to the damper 57 to create a pseudo load.
Although a hydraulic damper is used as the damper 57, for example, a pseudo load generating mechanism such as a powder torque limiter may be used. In FIG. 15 showing the configuration of the damper 57 (hydraulic damper), 60 is a rotary shaft directly connected to the planetary gear 53, 63 is oil, 61 is a seal member for preventing leakage of the internal oil 63, and 62 is a cover. Cover 62
The inside of the is filled with viscous oil 63,
Inside thereof, the impeller formed at one end of the rotating shaft 60 is adapted to rotate. As shown in FIG. 12, when the transport roller 8 contacts the paper pack 20, the pseudo load mechanism starts to rotate. As a result, the transport roller 8 that has been driven by the drive gear 51 until then starts transporting, and further transports the paper pack 20 into the inside of the apparatus. At this time, since the paper packs other than the special packs can be identified by the bar code 41 of the paper pack 20, when the paper packs other than the special pack are inserted, the transport roller 8 is reversed to move the paper pack. Can be discharged.

FIG. 16 is a perspective view of the moving mechanism of the side fence, and FIG. 17 is a perspective view showing a state in which the side fence is tilted. As shown in FIG. 16, the gear portion of the side fence drive motor 70 includes a rack 71 of the front side fence 7a and a rack 72 of the rear side fence 7b.
Are in mesh. When the fence drive motor 70 is rotated, both side fences 7a and 7b move toward or away from each other. When the paper pack 20 enters the main body, as shown in FIG. 17, the front side fence 7a is pushed by the paper pack 20 and falls to the back side,
It facilitates the entry of the paper pack 20. When it is detected that the side fence 7a has fallen down, the pack opening roller 2 moves upward and separates from the paper placement surface (the bottom surface of the paper pack storage portion) 81, and a gap is formed therebetween, as described later. To do. Therefore, the tongue piece 21 of the paper pack 20 that has entered the main body is connected to the pack opening roller 2 and the paper placement surface 8.
It is designed to enter the gap formed between the two. Since the side fence 7a is retractable and can be erected by the restoring force of the spring, when the final end of the paper pack 20 crosses the side fence 7a, the side fence 7a rises to its original position. After the side fence 7a is raised, the fence drive motor 70 is driven to move the side fence 7 to the central portion which is the transport reference position of the paper pack 20. The transport roller 8 is located behind the side fence 7. When the paper presence sensor detects the absence of paper, the side fence 7
Moves to the retracted position (maximum size).

The length of the tongue piece 21 is determined by the positional relationship between the pack opening roller 2 and the back fence 10. Figure 2
7 is an explanatory diagram for calculating the length of the tongue piece 21. When L1 is the distance from the axis of the pack opening roller 2 to the back fence 10, L2 is the thickness of the back fence 10 and L3 is the length of the tongue 21, the length of the tongue 21 is set so as to satisfy the condition of L3 ≧ L1 + L2. To determine As a result, when the rear end of the paper pack 20 hits the back fence 10, the end of the tongue piece 21 is located below the pack opening roller 2, so that the pack opening roller 2 reliably frictionally stretches the tongue piece 21. Can be drawn. In addition, in this embodiment,
Since the pack opening roller 2 is integrally and rotatably attached to the rear portion of the back fence 10, the length L3 of the tongue piece 21 can be shortened as much as possible.

The opening mechanism is mainly the pack opening roller 2.
And the drive shaft 91, and the pack opening roller 2
The drive shaft 91 is slightly movable in the upward direction. When the loading operation of the paper pack 20 is started, the pack opening roller 2 is lifted, so that the tongue 21 can easily enter. When the required torque at the time of opening the pack becomes strong, the pressure applied to the tongue piece 21 of the pack opening roller 2 also increases, and as a result, the carrying force increases. The pack opening roller 2 may have a structure divided into a plurality of parts.

FIG. 34 shows the positional relationship among the pack opening roller 2, the drive shaft 91 and the bottom surface of the paper pack accommodating portion in the pack opening operation. As shown in FIG.
The drive shaft 91 is located upstream of the pack opening roller 2, and the distance L between the sheet mounting surface 81 and the lower end of the drive shaft 91 is smaller than the diameter 2r of the pack opening roller 2 and larger than the radius r (r ≦ L. <2r). In other words, the lower end of the drive shaft 91 is located between the axial center of the pack opening roller 2 and the upper end. Next, when the loading operation of the paper pack 20 is started, a gap is formed between the pack opening roller 2 and the paper placement surface 81 as shown in FIG.
When 1 comes, the pack opening roller 2 is lowered without rotating the pack opening roller 2. When the pack opening roller 2 descends and holds the tongue piece 21 between it and the paper placing surface 81, the pack opening roller 2 is rotated to remove the tongue piece 21 as shown in FIG. Pull in the C direction. The back fence 10 fixed at this time functions to block the towed paper pack 20. The paper pack 20 is opened by pulling the tongue 21 while the paper pack 20 is stopped (see FIG. 3). The packaging sheets (20A, 20B) of the paper pack 20 are opened, peeled off, moved, and then carried into the dust box 1. 18 and 19 are a perspective view and a front view showing how the paper pack 20 is blocked by the back fence 10, respectively. Figure 2
Reference numeral 0 is a side view showing the positional relationship between the back fence 10 and the bottom surface of the paper pack storage portion, and FIG. 21 is a front view thereof. Since the front surface of the back fence 10 is a vertical surface and also serves as a paper retainer when the paper pack 20 is opened, the lower end of the back fence 10 and the paper placement surface (bottom surface of the paper pack storage portion) 81. Between the tongue pieces 21 of the paper pack 20
There is a gap 83 through which The paper placement surface 81 on which the paper pack 20 is placed is made of a low friction member such as a Teflon sheet. Further, when the paper pack 20 is opened, the paper is formed from a flexible material such as Mylar (trade name) under the back fence 10 so that the paper is not sent out from the gap 83 together with the packaging sheets (20A, 20B). A barrier 82 is provided. Hereinafter, a packaging process and an opening process of the paper pack 20 will be described. 22 is a development view of the packaging sheet of the paper pack, FIG. 23 is a schematic diagram showing the opening process of the paper pack, FIG.
4 is a partial sectional view showing an adhesive portion of the paper pack, and FIGS. 25 and 26 are perspective views showing a packaging process. Each of the packaging sheets 20A and 20B is made of two sheet materials having different strengths. 20a, 20b, 20 are respectively divided surfaces of the wrapping sheet 20A having higher strength, which are divided for each fold line.
c, 20d, 20e, 20f, 20g, 20h.
The tongue piece 21 integrated with the packaging sheet 20A is attached to the packaging sheet 20A. The tongue piece 21 is reinforced with a reinforcing material such as Mylar so as not to be bent by an external force. When packaging the paper pack 20, as shown in FIG. 25, first, the bundle of papers is rotated clockwise with the upper left corner of the packaging sheet 20A as a reference, and the top surface 20h, the right side surface 20g, and the back and bottom surface 20.
F is brought into contact with the sheet bundle and wound (a), and after one round, the back paste margin surface 20d is adhered to the end portion of the upper surface 20h which is the reference position (b) (see FIG. 24 (a)). Then, it is bent at one end of the back adhesive margin surface 20d and wound in the opposite direction (counterclockwise) in the order of the front adhesive margin surface 20c, the front left side surface 20b, and the front lower surface 20a, and the tongue piece 21 is placed at the diagonal position of the reference position. When it arrives, the winding is completed (c), and it is adhered again at the end portions of the front and bottom surfaces 20a (see FIG. 24 (b)). Next, as shown in FIG. 26, the wrapping sheet 20B is folded along the alternate long and short dash line, and the front and rear protruding portions are bent so that the left and right side surfaces fall inward (a). Then, the lower protruding portion is bent inward along the lower edge of the sheet bundle (b). Furthermore, the protruding portion on the upper side is folded inward and adhered (c). When opening, as shown in FIG. 23, first attach the tongue piece 21 to the front and bottom surfaces 20a.
By pulling in parallel with the upper surface 20h to peel off the adhesive portion (back adhesive margin surface 20d) at the reference position (b), and by further pulling, two packaging sheets 2 having different strengths are formed.
0A and 20B are cut at the boundary position (c), and the paper pack 20 is opened (d) (see FIG. 3).

FIG. 28 is a control block diagram of the entire copying machine. The CPU 102 reads control information from the ROM 100, which contains programs for performing various controls of the copying machine,
Through the data bus 103, the detection information from the sensor group 104 indicated by S1 and S2 is obtained, the information is exchanged with the RAM 101, and the motor group 105 and the like indicated by M1 and M2 are controlled. Note that the sensor group 104 includes a paper presence detection sensor, a paper pack detection sensor, and the like. The motor group 105 includes a transport motor for the paper pack 20 and a pack opening drive motor 14.
106 is an I / O port, 107 is a motor current detection circuit, and 108 is a motor drive circuit.

29 and 30 are a perspective view and a front view showing a door locking mechanism, and FIG. 31 is a front view showing a modification thereof. The lock mechanism of the door will be described based on these drawings. Only when the paper bottom bottom detection filler (not shown) detects the bottom bottom of the paper, the solenoid 111 is urged and the door lock member 112 retracts to the retracted position, so that the door 31 can be opened and closed. In the modification shown in FIG. 31, similarly, when the sheet is bottomed out and the sheet bottoming detection filler 110 is lowered, the door locking piece 113 coaxially attached to the sheet bottoming detection filler 110 is counterclockwise. The door 31 can be opened and closed by rotating in the rotating direction. The door lock mechanism described above also functions as a paper feed cassette lock mechanism. That is, when the paper in the paper feed cassette 120 has bottomed out, as shown in FIG.
Is urged, the door lock member 112 at the front end of the solenoid 111 withdraws from the hole in the side wall of the paper feed cassette 120, and the lock of the paper feed cassette 120 is released.
The paper feed cassette 120 can be taken out. That is, when the paper feed cassette 120 is unlocked, the solenoid 111 is urged to lock the lock member 11.
The paper feed cassette 120 can be attached / detached by retracting 2 and the lock member 112 locks the paper feed cassette 12 by cutting off the energization of the solenoid 111 when locked.
The paper feed cassette 120 is locked because it projects into the perforation on the 0 side.

FIG. 33 is a flow chart of the paper pack automatic opening control. First, it is determined whether or not there is paper in the paper feed cassette 120 (S1), and if there is, the door 31
~ 33 are locked so that the paper pack 20 cannot enter (S2). When there is no more paper in the paper feed cassette 120, a preparation operation is started in preparation for inserting the paper pack 20.
That is, first, the side fence 7 is moved to the retracted position, and the paper feed tray 6 is lowered. The retracted position of the side fence 7 is outside the maximum paper size. During this time, the doors 31 to 33 are still locked.
The paper pack 20 cannot be inserted. When the preparation for insertion is completed, a pack conveyance control subroutine is executed (S3), the doors 31 to 33 are unlocked, and then the inserted paper pack 20 is inserted into the paper feed tray 6 (paper feed cassette 1).
20) The paper is conveyed to the inside and the paper size is detected. If there is no conveyance error (NO in S4), the pack opening control subroutine is executed (S5), and further the paper setting subroutine is executed (S6).

The conveyance control of the paper pack 20 executed in the pack opening control subroutine will be described. 35 and 36 are flowcharts of the pack transport control subroutine. When the paper pack 20 is inserted (YES in S11), it is determined whether the paper pack 20 has been inserted to the pack transport start reference position (S12). If the determination result is No, it is further determined whether the elapsed time after insertion has passed a predetermined time (S13). If the determination result is Yes, a transport error is displayed (S23), and for example, the paper pack 20 If the insertion is insufficient, the operator is prompted to reinsert it. When the paper pack 20 reaches the pack conveyance start reference position, a message to that effect or a buzzer is issued to prompt the operator to stop pushing the paper pack 20 (S1).
4). Next, after a lapse of a predetermined time (S15), the transport roller 8 is rotated to start the transport of the paper pack 20 (S16) (see FIG. 36). This is to prevent an operation error by delaying the start of conveyance by a time sufficient for the operator to let go of the paper pack 20. Further, at this time, the paper size is also detected at the same time. When the paper pack 20 is conveyed inside the side fence 7, the front side fence 7a stands up. When the sensor detects the rising of the side fence 7a, the transport roller 8 stops (S17). If the sensor cannot detect the rising of the side fence 7a even after the lapse of a predetermined time, it is determined that the paper pack 20 has not been normally conveyed, the driving of the transportation roller 8 is stopped, and a transportation error is displayed. Then, the paper pack 20 is conveyed by moving both side fences 7a and 7b inward, and the paper pack 20 is set to the central position (S18). The amount of movement of the side fence 7 at this time is determined according to the paper size detected in advance, and the side fence 7 is stopped after moving by that distance (S19). If the paper size is not determined at this point, the movement is stopped by the motor current detection described later. A sensor may be installed on the back side fence 7b to stop the movement by detecting the contact of the paper pack 20. Furthermore, if you install multiple sensors in the paper feed direction,
Even if the paper pack 20 is skewed and conveyed, it can be surely corrected by the side fence 7. After that, it is confirmed whether or not the sheet has been certainly conveyed (S20), and if the sheet has not been conveyed, after a predetermined time has passed (S21), a conveyance error display is performed (S22).

The insertion of the paper pack 20 is detected by a reflection type sensor 40 installed near the paper insertion opening shown in FIG. Further, the conveyance start position information is marked on the paper pack 20, and the marking is read by the reflective sensor 40 to determine the pack conveyance start reference position. This marking is also used as a paper size detection mark described later. In order to prevent the paper pack 20 from falling out due to its own weight, the pack conveyance start reference position is the paper pack 2
The position where 0 has reached the position of the transport roller 8 and the transport roller 8 can reliably transport it. Under the above conditions, the pack conveyance start reference position is set to a constant distance from the rear end in the insertion direction regardless of the paper size, so that the paper pack 20 is always conveyed when the operator inserts it to a constant position regardless of the paper size. Since the operation is started, it is possible to prevent the operator's operation mistake. Although the method of determining the passage of time in step S15 detects the elapsed time from the leading edge of the paper pack 20 to the detection of the marking, the opening time of the doors 31 to 33 may be detected. When the marking cannot be detected or the detected marking does not have the predetermined pattern, it is determined that the paper pack 20 is not the dedicated pack or the insertion direction of the paper pack 20 is wrong, and the conveyance is started. Instead, the reinsertion instruction may be given. Further, the paper size is detected by marking a bar code 41 corresponding to the paper size on the paper pack 20 and reading the bar code 41 by the reflection type sensor 40 installed at the paper pack insertion slot. 40
Is a method for measuring the length of the paper by measuring the transportation time from the detection of the marking of the pack transportation start reference position to the detection of the rear end of the paper pack 20, and the paper size (paper width) at the doors 31 to 33. A method of determining the paper size in combination with detection may be considered. Furthermore, if the detected paper size is the same as the size of the paper that has been used up to that point, the conveyance continues as it is, and if it is different, the conveyance is stopped and the operator is alerted to detect an operation error. it can. If the operator notices an operation error at this stage, the transport roller 8 can be reversed by a switch operation or the like, and the paper pack 20 can be returned to the original position.

Next, the opening control of the paper pack 20 will be described. FIG. 37 is a flowchart of the pack opening control subroutine. When the opening control of the pack is started, the paper feed tray 6 (or the paper feed cassette 120) is first locked (S31). This is to prevent the paper pack 20 from being pulled out during the opening operation and hindering the opening operation. Next, normal rotation of the pack opening roller 2 is started (S32), and the tongue piece 21 of the paper pack 20 and the packaging sheets 20A, 20B held between the pack opening roller 2 and the paper placing surface 81 are dusted. The paper pack 20 is opened by moving it in the direction of the box 1. Paper pack 2
If the opening of 0 is not completed (NO in S33), by determining whether or not a predetermined time has elapsed after the opening operation, for example, since the paper pack 20 is not a dedicated pack,
Alternatively, a pack opening error is detected when the insertion direction of the paper pack 20 is reversed and the tongue 21 is not present, or when the tongue 21 is not pinched (S34). In the state where the pack opening error occurs (YES in S34), the motor current of the pack opening drive motor 14 does not increase due to the pulling of the tongue piece 21 of the pack opening roller 2. Therefore, the pack opening error is detected by detecting the motor current. Judgment becomes possible. In this case, an error message is displayed (S35), the pack opening device 2 is pressed against the paper pack 20 again, and the opening operation is repeated. If the pack opening error still occurs even after repeating a plurality of times, the opening operation is stopped. Paper pack 2
When the opening of 0 is completed (YES in S33), the rotation of the pack opening roller 2 is stopped. As a means for detecting the completion of opening the paper pack, the completion of opening the paper pack can be detected by detecting a decrease in the motor current of the pack opening drive motor 14 that drives the pack opening roller 2. That is, the pack opening roller 2 is the opened paper pack 20.
Since the wrapping sheet 20A is rotated with a slightly high torque during conveyance, the current value of the motor current is kept at a predetermined value, but when the wrapping sheets 20A and 20B of the paper pack 20 are all pulled out, the pack is opened. Since the load on the drive motor 14 is eliminated, the motor current of the pack opening drive motor 14 is reduced. Therefore, the completion of opening the paper pack can be detected from the difference in the current values.

If the entrance sensor 40 does not measure the paper size of the paper pack 20, the side fence 7 can also measure the paper size. For example, when the side fence 7 is moved to reach the end of the paper pack 20, the side fence 7 is further moved.
Cannot move, and the current value of the side fence drive motor 70 that drives the side fence 7 increases. Therefore, the paper size can also be measured by measuring the time from the start of the movement of the side fence 7 to the rise in the current of the side fence drive motor 70. further,
The detection of the end position of the paper pack 20 is performed by detecting the current of the side fence drive motor 70, and the side fence 7b on the back side.
It is also possible to detect the contact of the paper pack 20 by installing a sensor in the. Further, the movement amount of the side fence 7 can be measured by counting the number of rotations of the side fence drive motor 70 by attaching an encoder to the side fence drive motor 70 in addition to timing the above-mentioned time. Can be detected. Side fence 7
Even if the paper size is measured with, the opening operation is continued if the paper size is the same as the paper size used so far, and if the paper size is different, the A message is displayed to warn the operator, and the operator is prompted to select whether to continue the opening operation or to reload the paper pack 20, and prevent the erroneous opening operation of the paper pack 20 due to an operation error of the operator. .

Further, while the pack is being opened, a message "in operation" or the like is displayed so that the operator can understand the situation. Further, when the operation is completed, the operation is completed by displaying "operation completed" or a buzzer sound. It is like this. During the opening operation, it is possible to set each mode such as selection of the paper feed cassette 120, setting of the number of copies, use of a sorter, etc. After the opening operation, the copying operation is automatically performed. When the opened sheets are replenished while the sheets remain in the sheet feeding tray 6 (sheet feeding cassette 120), the bottom plate of the sheet feeding tray 6 is lowered by pressing the corresponding operation switch. The paper feed cassette 120 is locked and cannot be pulled out until the bottom plate of the paper feed tray 6 is completely moved downward. After the lowering of the bottom plate of the paper feed tray 6 is completed, the lock of the paper feed cassette 120 is released. After the paper feed tray 6 is pulled out and the paper is replenished, when the paper feed cassette 120 is set, the paper feed cassette 1 is again set.
After locking 20, the bottom plate of the paper feed tray 6 is raised to complete the paper feed preparation.

[0022]

As described above, according to the first aspect of the present invention, the pulling means for peeling the packaging sheet from the paper pack and the pulling means by pressingly contacting the pull-out end of the packaging sheet and carrying it by friction are provided. While supporting on the downstream side, while holding the paper pack in place at the upstream edge while the towing means pulls the packaging sheet, it has a holding means, which damages the internal paper and makes noise. And the paper pack usage fee does not become expensive, the paper supply operation is significantly simplified, the draw-out end of the packaging sheet can be shortened as much as possible, and the packaging sheet can be peeled smoothly and quickly. can do. According to the second aspect of the present invention, the holding means has an abutting surface at the upstream edge of the holding means, which is substantially parallel to the downstream end surface of the paper pack. The peeling operation of the sheet can be done smoothly,
The holding operation of the paper pack of the holding means can be ensured.

[Brief description of drawings]

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

FIG. 2 is a perspective view of a paper feeding unit of the copying machine.

FIG. 3 is a perspective view showing an opening process of a paper pack.

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

FIG. 5 is a perspective view showing a support portion of a door of a sheet insertion port.

FIG. 6 is a transverse cross-sectional view of a sheet insertion port door.

FIG. 7 is a perspective view showing a state where a paper pack is inserted into a paper insertion opening.

FIG. 8 is a perspective view of a door according to a modified example.

FIG. 9 is likewise a vertical sectional view.

FIG. 10 is a perspective view showing a paper pack type detection operation of the paper pack detection mechanism.

FIG. 11 is a perspective view of a drive mechanism of a transport roller.

FIG. 12 is an explanatory diagram showing a state of pressure contact between an entered sheet pack and a transport roller.

FIG. 13 is a configuration diagram showing a pseudo load mechanism of a transport roller.

FIG. 14 is a configuration diagram showing a pseudo load mechanism of a transport roller according to a modification.

FIG. 15 is likewise a longitudinal sectional view of a damper of the pseudo load mechanism.

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

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

FIG. 18 is a perspective view showing how the paper pack is blocked by the back fence.

FIG. 19 is likewise a front view.

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

FIG. 21 is likewise a front view.

FIG. 22 is a development view of the packaging sheet of the paper pack.

FIG. 23 is a schematic diagram of an opening process of a paper pack.

FIG. 24 is a partial cross-sectional view showing an adhesive portion of a paper pack.

FIG. 25 is a perspective view showing a packaging process of the paper pack.

FIG. 26 is a perspective view showing a packaging process following FIG. 25.

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

FIG. 28 is a control block diagram of the entire copying machine.

FIG. 29 is a perspective view showing a door locking mechanism.

FIG. 30 is likewise a front view.

FIG. 31 is a perspective view showing a lock mechanism of a door according to a modified example.

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

FIG. 33 is a flowchart of a paper pack automatic opening control.

FIG. 34 is an explanatory diagram showing the positional relationship between the pack opening roller, the drive shaft, and the bottom surface of the paper pack storage unit.

FIG. 35 is a flowchart of a pack transport control subroutine.

FIG. 36 is a flowchart following FIG. 35.

FIG. 37 is a flowchart of a pack opening control subroutine.

[Explanation of symbols]

 1 Dust Box 2 Pack Opening Roller 4 Drive Motor 6 Paper Feed Tray 7 Side Fence 8 Conveying Roller 9 Paper Feeding Roller 10 Back Fence 11, 12, 13 Paper Insert Port 14 Pack Opening Drive Motor 20 Paper Pack 20A, 20B Packaging Sheet 21 Tongue One side 31, 32, 33 Door 51 Drive gear 53 Planetary gear 70 Fence drive motor 81 Paper loading surface (Paper pack storage bottom) 100 ROM 101 RAM 102 CPU 104 Sensor group 105 Motor group 111 Solenoid 112 Lock member 120 Paper cassette

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Tomohito Shimizu 1-3-6 Nakamagome, Ota-ku, Tokyo Within Ricoh Co., Ltd. (72) Inventor Masaru Shiina 1-3-6 Nakamagome, Ota-ku, Tokyo Stock company Ricoh

Claims (2)

[Claims] 1. When a paper pack, in which a bundle of paper is wrapped with a wrapping sheet with an adhesive, is inserted into a main body of a paper feeding device, the wrapping sheet of the paper pack is automatically removed to remove the paper bundle inside. In a paper feeding device for loading a paper pack, which is exposed and is capable of feeding the exposed papers one by one,
The packaging sheet is wound by at least one turn around the packaging sheet and is frictionally conveyed by being pressed into contact with the pull-out end of the packaging sheet pulled out to one end side of the paper pack partially adhered with an adhesive. And a traction means for separating the paper sheet from the paper pack, while supporting the traction means on the downstream side, while the traction means pulls the packaging sheet,
It has a holding means for holding the paper pack in a fixed position at the upstream side edge portion, and a paper feeding means for feeding the papers of the paper bundle exposed by peeling the packaging sheet by the towing means one by one. A paper feeding device for loading a paper pack, characterized in that 2. The paper pack loading paper feeder according to claim 1, wherein the holding means has an abutting surface at an upstream edge thereof, the abutting surface being substantially parallel to the downstream end surface of the paper pack. .