JPH06219568A - Sheet pack loading paper feeder - Google Patents

Abstract

PURPOSE:To simplify a paper supplying motion, making a packing sheet separable smoothly and speedily, and to prevent the royalty of a paper pack from going to expensiveness in addition to no damage to a sheet inside and no noise happening. CONSTITUTION:In a state that a back fence 10 has pressed a paper pack 20, a magnet roller of a pack unsealer picks and pulls a drawing tongue piece 21 of a packing sheet 20A packing a paper pack 20, whereby at the time of unsealing the paper pack 20, an adhesive part between a back overlap width surface 20d and a top face 20a of the pack sheet 20A is separated at low speed, but on and after it is made so as to pull it at high speed.

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]

SUMMARY OF THE INVENTION The above-mentioned object is to make a pulling-out end of a packaging sheet pulled out to one end side of a paper pack in which a bundle of sheets is wrapped by a packaging sheet for at least one turn and partially bundled. A sheet pulling unit that holds the sheet pack in a fixed position while the sheet pulling unit pulls the packaging sheet by peeling the packaging sheet from the sheet pack to expose the internal sheet bundle, and holding unit that holds the sheet pack in a fixed position. A motor control unit that controls the number of rotations of the motor that drives the sheet pulling unit, rotates the motor at a low speed when peeling off the adhesive portion of the packaging sheet, and at a high speed when peeling off other portions, This is achieved by having a sheet feeding unit that feeds the sheets of the sheet bundle exposed by peeling the packaging sheet by the sheet pulling unit one by one.

[0005]

The sheet pulling means holds the pull-out end of the packaging sheet pulled out to the one end side of the paper pack and pulls it, peels the packaging sheet from the paper pack, and exposes the bundle of sheets inside. The holding means holds the paper pack in place while the sheet pulling means pulls the packaging sheet. The motor control means controls the number of rotations of the motor that drives the sheet pulling means, and rotates the motor at a low speed when peeling the adhesive portion of the packaging sheet and at a high speed when peeling the other portion. The sheet feeding unit feeds the sheets of the sheet bundle exposed by peeling the packaging sheet by the sheet 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 packaging sheet of the paper pack, 2 is a pack opening device for opening the paper pack, 3 is an inlet guide plate, 4 is a drive motor of a transport roller described later, and 5 is drive. A drive shaft of the motor 4, 6 is a paper feed tray on which paper is stacked, 7 is a side fence that is provided in plural according to the paper size of the paper and regulates the side edge of the paper on the paper feed tray 6, and 8 is paper Is a conveyance roller that conveys the sheet in the width direction, 9 is a sheet feeding roller that feeds the sheet toward the image forming unit A, and 10 is a back fence that regulates the trailing edge of the sheet of the sheet 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, 14a is a pack opening device drive motor, and 14b is a drive motor.
Is a back fence drive motor, and 15 is a screw attached to this motor shaft. Paper insertion slot 11,
12 and 13 have paper insertion openings 11, 12, and 13 respectively.
Corresponding to, the doors 31, 32, 33 shown in perspective views or sectional views in FIGS.
Reference numerals 2 and 33 guide the paper pack 20 inserted into each paper insertion opening (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 slot 12, only the doors 31 and 32 can be opened.
Since the door 33 of the insertion port 13 for the three sizes is not opened, the paper pack 20 can be guided so as not to shift backward. Further, as shown in the perspective view of FIG. 5 as an example of the support portion of the door 31, the doors 31, 32, 33 are automatically returned to their original vertical orientation by the urging force of the spring 34 after the paper pack 20 is inserted. I'm supposed to come back. In this embodiment, A5, A4
The doors 31, 32, and 33 are provided corresponding to the sheet insertion ports 11, 12, and 13 for each sheet size A3, but by increasing the division position of the sheet insertion port as shown in the perspective view of FIG. It is also possible to support B-series paper. Alternatively, as shown in the perspective view of FIG. 8 and the vertical sectional view of FIG.
For example, a sliding groove 35 is provided in the left and right direction of the central portion of the door 31,
A guide piece 36 may be fitted in the sliding groove 35, and the guide piece 36 may be moved to the left or right according to the size of the sheet to regulate the sheet end portion of the sheet pack 20. 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. A reflection type sensor 40 is provided near the reference position on the right side of the paper insertion port 11, and a bar code 41 is provided on one side of the paper pack 20 that has entered the paper insertion port 11.
By reading, the type of the paper pack 20 is detected.

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, it may be a Teflon sheet.
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. When the drive gear 51 is rotated clockwise, the transport roller 8 also rotates clockwise and drops onto the upper surface of the paper pack 20. Has become. 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. Side fence 7
Since a is a retractable type and can be erected by the restoring force of the spring, when the final end of the paper pack 20 exceeds the side fence 7a, the side fence 7a rises to its original position. After the side fence 7a gets up, the fence drive motor 70 is driven to drive the side fence 7a.
Is moved to the central portion which is the transport reference position of the paper pack 20. After the positioning by the side fence 7 is completed, the back fence 10 performs positioning in the front-rear direction. In this case, since the paper size of the paper pack 20 is known in advance, the movement amount of the back fence 10 is determined based on this paper size data. 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 and the back fence 10 are at the retracted position (maximum size).
Move to.

FIG. 18 is a perspective view of the back fence moving mechanism, and FIG. 19 is a perspective view of the vicinity of the back fence 10 and the pack opening device 2. In FIG. 18, 80 is a bearing, and FIG.
In FIG. 9, 91 is a rubber roller 90 coated with rubber.
Is a drive shaft for driving the motor, 92 is a magnet roller drive motor, and 93 is a worm gear. Back fence 10
Since the female screw for screwing the screw 15 is cut in the pack opening device 2 and the pack opening device 2, the pack opening device drive motor 14
By rotating a and the back fence drive motor 14b, both can be moved independently. The unpacking mechanism of the pack unpacking 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 unpacking direction. The inlet guide plate 3 is provided upstream of the magnet roller 90, and the inlet guide plate 3 is free to escape from the direction in which the tongue 21 is held. Therefore, when the required torque for opening the pack becomes strong, the pressure applied to the tongue piece 21 of the magnet roller 90 also increases, and as a result, the carrying force increases. In the standby state of the back fence 10, the tongue piece 21 has already been moved to the back fence 10.
It protrudes to the rear side. At the same time as the back fence 10 starts moving, the pack opening device 2 also starts moving,
The magnet roller 90 is placed on the tongue 21 and stopped. When the tongue 21 comes into contact with the magnet roller 90, the magnet roller 90 is lifted up, so that the tongue 21 can easily enter (see FIG. 34). The magnet roller 90 may have a structure divided into a plurality of parts. 20 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 of the same. Since the back fence 10 also serves as a paper retainer when opening the paper pack 20, the tongue piece 21 of the paper pack 20 is provided between the lower end of the back fence 10 and the paper placement surface (the bottom surface of the paper pack storage portion) 81. Gap 8 through which
3 is provided. Further, the paper placing surface 81 facing the magnet roller 90 is made of a low friction member such as a Teflon sheet. Furthermore, when the paper pack 20 is opened, the paper is packed into the wrapping sheet (20A,
20B), a barrier 82 made of a flexible material such as mylar is provided below the back fence 10 so as not to be sent out.

The packaging process and the opening process of the paper pack 20 will be described below. 22 is a development view of a packaging sheet of a paper pack, FIG. 23 is a schematic diagram showing an opening process of the paper pack, FIG. 24 is a partial sectional view showing an adhesive portion of the paper pack,
25 and 26 are perspective views showing the packaging process. Each of the packaging sheets 20A and 20B is made of two sheet materials having different strengths. The stronger packaging sheet 20
20a, 20 respectively the surface divided into every fold of A
b, 20c, 20d, 20e, 20f, 20g, 20h
And 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 packing the paper pack 20, FIG.
As shown in FIG. 5, first, the bundle of sheets is rotated clockwise with the upper left corner of the packaging sheet 20A as a reference, and the upper surface 20h, the right side surface 20g, and the lower back surface 20f are brought into contact with the bundle of sheets (a), and after one round, the back The adhesive margin surface 20d is adhered to the end portion side of the upper surface 20h which is the reference position (b) (see FIG. 24 (a)). After that, it is bent at one end of the back adhesive margin surface 20d to form the front adhesive margin surface 20d.
c, the front left side surface 20b, and the front lower surface 20a are wound in the opposite directions (counterclockwise), and when the tongue piece 21 reaches the diagonal position of the reference position, the winding is finished (c), and again at the end of the front lower surface 20a. Adhere (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, pull the tongue piece 21 parallel to the front and bottom surfaces 20a to peel off the adhesive portion (back adhesive margin surface 20d) at the reference position on the top surface 20h (b), and continue pulling. The two packaging sheets 20A and 20B having different strengths are cut at the boundary position by (c), and the paper pack 20 is opened (d) (FIG. 3).
reference). The length of the tongue piece 21 is determined by the positional relationship between the magnet roller 90 and the back fence 10. FIG. 27
FIG. 6 is an explanatory diagram for calculating the length of the tongue piece 21. When L1 is the distance from the axis of the magnet roller 90 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 decide. Accordingly, 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 magnet roller 90, so that the magnet roller 90 reliably pulls the tongue piece 21 by friction. be able to.

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. Further, the motor group 105 includes a transport motor for the paper pack 20, a pack opening device drive motor 14a, and the like. 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 flowchart of the automatic paper-pack 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 back fence 10 and the side fence 7 are moved to the retracted position, and the paper feed tray 6 is lowered. The retracted position of the back fence 10 is outside the withdrawal portion of the paper feed cassette 120 (or the paper feed tray 6), and the retracted position of the side fence 7 is outside the maximum paper size. Further, during this time, the doors 31 to 33 are still locked and 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 conveyed into the paper feed tray 6 (paper feed cassette 120). Detects the paper size. If there is no transport error (NO in S4), the pack opening control subroutine is executed (S5).
A paper set subroutine is executed (S6).

The pack opening operation executed in the pack opening control subroutine will be described in detail below. FIG. 34 shows the magnet roller 90 and the drive shaft 9 in the pack opening operation.
1 shows the positional relationship between 1 and the bottom surface of the paper pack storage portion. As shown in FIG. 6A, the drive shaft 91 is located upstream of the magnet roller 90, and the distance L between the paper placement surface (bottom surface of the paper pack storage section) 81 and the lower end of the drive shaft 91 is the same as that of the magnet roller 90. It is smaller than the diameter 2r 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 magnet roller 90 and the upper end. Next, the pack opening operation is started,
As shown in FIG. 6B, when the tongue 21 comes between the gaps formed below the magnet roller 90, the magnet roller 9 is not rotated and the magnet roller 9 is not rotated.
After lowering 0, it is moved and the tongue 21 is pulled. At this time, the back fence 10 is fixed at the setting position of the paper pack 20, and as shown in FIG. 7C, the magnet roller 90 is rotated to pull the tongue piece 21 in the a direction, so that the paper pack 20 is not moved. Perform the role of blocking. The paper pack 20 is opened by pulling the tongue 21 while the paper pack 20 is stopped (see FIG. 3). The pack opening device 2 moves while opening the paper pack 20 and reaches the position facing the dust box 1.

Next, the conveyance control of the paper pack 20 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 or not the elapsed time after insertion has passed a predetermined time (S1).
3) If the result is Yes, a transport error is displayed (S23), and if the paper pack 20 is insufficiently inserted, the operator is prompted to reinsert it. When the paper pack 20 reaches the pack transport start reference position, the fact is displayed or a buzzer is notified to prompt the operator to stop pushing the paper pack 20 (S14). 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. After that, the paper pack 20 is conveyed by moving both side fences 7a and 7b inward, and the paper pack 20 is set at the central position (S1).
8). 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,
If the paper size is not determined at this point, the movement is stopped by the motor current detection described later. In addition, the sensor is installed on the back side fence 7b, and the paper pack 20
The movement may be stopped by detecting the contact of the. Further, if a plurality of these sensors are installed in the paper feeding direction, the side fence 7 can surely correct the paper pack 20 even if the paper pack 20 is obliquely conveyed. After that, it is confirmed whether or not the sheet has been reliably conveyed (S2
0), if not conveyed, after a predetermined time has passed (S21),
A transportation error is displayed (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. Then, the back fence drive motor 14b and the pack opening device drive motor 14a are normally rotated (S3
2) The back fence 10 and the pack opening device 2 are brought close to the paper pack 20 and stopped at a position corresponding to the paper size (S33). At this time, the tongue piece 21 of the paper pack 20 is held in the pack opening device 2. Next, only the pack opening device drive motor 14a is reversed (S34),
The pack opening device 2 is retracted while holding the tongue piece 21 and stopped in front of the dust box 1 (S35). Further, the normal rotation of the magnet roller 90 is started (S36), and the paper pack 20 is opened. If the opening of the paper pack 20 is not completed (NO in S37), it is determined whether or not a predetermined time has elapsed after the opening operation, for example, because the paper pack 20 is not a dedicated pack, or If the insertion direction of 20 is reversed and the tongue 21 is not present, or if the tongue 21 is not pinched, a pack opening error is detected (S38). When the pack opening error occurs (YES in S38), the motor current of the pack opening device drive motor 14a increases due to the friction between the magnet roller 90 and the sheet placement surface 81. Therefore, the pack opening is detected by detecting the motor current. Enables error judgment. In this case, an error message is displayed (S39), 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. When the opening of the paper pack 20 is completed (YES in S37), the rotation of the magnet roller 90 is stopped and the pack opening device 2 is also stopped backward as it is. As a means for detecting the completion of opening the paper pack, the completion of opening the paper pack can be detected by detecting an increase in the motor current of the pack opening device drive motor 14a that drives the magnet roller 90. That is, since the magnet roller 90 rotates with a low torque during the transportation of the opened packaging sheet 20A of the paper pack 20, the current value of the motor current is small, but the paper pack 20
When all the packaging sheets 20A are pulled out, the motor current increases due to an increase in the frictional force between the magnet roller 90 and the sheet placement surface 81. Therefore, the completion of opening the paper pack can be detected from the difference in the current values.

In the opening operation of the paper pack 20, the rotational load of the magnet roller 90 is shown in FIG.
It becomes the largest when the adhesive portion (back adhesive margin surface 20d) at the reference position on the upper surface 20h of the paper pack 20 shown in (b) is peeled off. If the torque of the magnet roller 90 at that time is insufficient, the packaging sheet 20A cannot be peeled off cleanly,
It may not be peelable. Therefore, in the present embodiment, the rotation speed of the pack opening device drive motor 14a that drives the magnet roller 90 that pulls the tongue piece 21 of the paper pack 20 and the wrapping sheet 20A is controlled, and the adhesive portion (the back adhesive margin surface 20d). When peeling off, it is possible to select a torque enhancement mode in which it rotates at a low speed to generate a large torque. FIG. 38 is a flowchart of the torque boost mode. When the torque enhancement mode is selected and the pack opening device drive motor 14a starts to rotate by the pack opening control, first, the pack opening device drive motor 14a rotates in the low speed rotation mode (S40). As a result, a large torque is generated in the magnet roller 90, so that the adhesive portion (the back adhesive margin surface 20d) of the packaging sheet 20A can be peeled off smoothly. At this time, the pack opening device drive motor 1
The number of rotations of 4a is counted, and it is determined whether or not the count value of this number of rotations has reached the set value 1 corresponding to the time required for peeling the adhesive portion (S41). When the count value of the number of rotations reaches the set value 1, the pack opening device drive motor 14a is rotated in the high speed rotation mode (S42). As a result, the packaging sheet 20A can be quickly stripped from the paper pack 20. Then, it is determined whether or not the set value 2 corresponding to the time required to complete the opening of the paper pack has been reached (S43). When the count value of the number of rotations reaches the set value 2, the pack opening device drive motor 14a is stopped (S44).

If the entrance sensor 40 does not measure the paper size of the paper pack 20, the side fence 7 and the back fence 10 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 cannot move any more, and the side fence drive motor 70 drives the side fence 7.
Current value 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 end position of the paper pack 20 can be detected by detecting the contact of the paper pack 20 by installing a sensor on the back side fence 7b in addition to the current detection of the side fence drive motor 70. 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. The back fence 10 can be used for detecting the paper size by performing the same timing or counting.
Even when the paper size is measured by the side fence 7 and the back fence 10, as in the case of measuring the paper size by the entrance sensor 40, if the paper size is the same as the paper size used so far, the opening operation is continued and the paper size is continued. If it is different, the message is displayed to warn the operator, and the operator is prompted to continue the opening operation or to reload the paper pack 20. Prevent erroneous opening operation of.

Further, during the operation of opening the pack, a message such as "in operation" is displayed so that the operator can grasp the situation, and 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 paper is replenished while the paper remains in the paper feed tray 6 (paper feed cassette 120), the bottom plate of the paper feed tray 6 is lowered by depressing the corresponding operation switch, and the back fence. Move 10 backwards. The paper feed cassette 120 is locked and cannot be pulled out until the back fence 10 is completely moved backward. After the evacuation of the back fence 10 is completed, the lock of the paper feed cassette 120 is released. After the paper feed tray 6 is pulled out and paper is replenished, the paper feed cassette 12
When 0 is set, the paper feed cassette 120 is locked again, the back fence 10 is moved forward, and stopped when it hits the paper. Then, the bottom plate of the paper feed tray 6 is raised to complete the paper feed preparation.

[0023]

As described above, according to the present invention,
The pull-out end of the packaging sheet pulled out to one end side of the paper pack held at a fixed position is nipped and pulled, the packaging sheet is peeled from the paper pack to expose the internal sheet bundle, and the sheet pulling means is driven. By controlling the number of rotations of the motor, rotate the motor at a low speed when peeling the adhesive part of the packaging sheet and at a high speed when peeling other parts, and expose the bundle of sheets exposed by peeling the packaging sheet. Since the paper is fed one by one, it does not damage the internal paper or generate noise, and the paper pack usage fee is not expensive, greatly simplifying the paper supply operation. The packaging sheet can be smoothly and quickly peeled off.

[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 of a back fence moving mechanism.

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

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 magnet 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.

FIG. 38 is a flowchart of a torque boosting mode.

[Explanation of symbols]

 1 Dust Box 2 Pack Opening Device 4 Drive Motor 6 Paper Feed Tray 7 Side Fence 8 Transport Roller 9 Feed Roller 10 Back Fence 11, 12, 13 Paper Insert Port 14a Pack Opening Device Drive Motor 14b Back Fence Drive Motor 20 Paper Pack 20A , 20B Packaging sheet 21 Tongue piece 31, 32, 33 Door 51 Drive gear 53 Planetary gear 70 Fence drive motor 81 Paper placement surface (bottom surface of paper pack storage part) 90 Magnet roller 100 ROM 101 RAM 102 CPU 104 Sensor group 105 Motor group 111 solenoid 112 lock member 120 paper feed 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 (1)

[Claims] 1. A paper pack in which a paper bundle is wrapped with a wrapping sheet is inserted into a main body of a paper feeding device, and the wrapping sheet of the paper pack is automatically removed to expose the paper bundle inside.
In a paper pack loading paper feeding device that feeds the exposed paper bundles one by one, the one end side of the paper pack wound at least one round by the packaging sheet and partially bonded Sheet pulling means for holding and pulling out the pull-out end of the pulled-out packaging sheet, and peeling the packaging sheet from the paper pack; and the paper pack in a fixed position while the sheet pulling means pulls the packaging sheet. By controlling the number of rotations of the holding means and the motor for driving the sheet pulling means, the peeling speed is low when peeling the adhesive portion of the packaging sheet, and high speed when peeling other portions. A motor control means for rotating the motor and a paper feeding means for feeding the sheets of the sheet bundle exposed by peeling the packaging sheet by the sheet pulling means one by one are provided. Paper pack loading paper feeding apparatus according to claim.