JPS59203017A - Paper feeder - Google Patents

Abstract

PURPOSE:To assuredly detect the selection of an automatic feed or manual feed by providing a paper feeder with discriminating means for discriminating the selection of manual feed and control means for controlling the drive of an apparatus body according to signals of a detecting element and discriminating means. CONSTITUTION:A micro-switch 140 is discriminating means for discriminating the selection of manual feed and adapted to output a selection signal. A switch 225 is adapted to output a signal for discriminating the size of paper in a paper feed cassette. A magnetic detecting element 605 is adapted to discriminate the size of paper in a paper feed cassette, and a magnetic detecting element 205 and a detecting element 174 are adapted to output a signal for discriminating the existence and absence of paper in the cassette. A cassette change switch 1028 is adapted to select and change either automatic paper feed of an automatic paper feed mechanism. Output signals of the respective switches are input to a display selection control 151. The control portion 151 controls a display device 152 to display the selection of a cassette, paper size and the existence of paper.

Description

[Detailed description of the invention] [Technical field of invention] The present invention relates to a paper feeding device.

[Technical background of the invention and its problems]

Conventionally, in paper feeding devices, in order to automatically feed paper sheets of various sizes, cassettes classified by paper sheet size can be attached and removed from the insertion slot of the automatic paper feeding mechanism. Furthermore, in addition to automatic paper feeding, some machines have a manual feed guide that can feed paper of any predetermined size.

If the size and feeding direction of paper sheets differ, it is necessary to change the size display on the display panel, and it is also necessary to automatically detect the conveyance timing according to the size and feeding direction.

However, in conventional paper feeding devices that can be switched between automatic paper feeding and manual paper feeding, malfunctions often occur because detection is performed mechanically.

Furthermore, the display of the size of paper sheets and the selection display of manual or automatic paper feeding are complicated and confusing for the operator.

[Purpose of the invention]

This invention was made in view of the above circumstances, and can easily and reliably detect cassette information and the selection of automatic paper feeding or manual paper feeding, and provide the information to the main body control, and further improve operability for the operator. It is an object of the present invention to provide a paper feeding device that can display images clearly and with improved quality.

[Summary of the invention]

The paper feeding device according to the present invention includes a detection element actuation source disposed in a paper feeding cassette that can be detachably attached to an automatic paper feeding mechanism, a detection element disposed near the automatic paper feeding mechanism, and a manual paper feeding mechanism. The above object is achieved by comprising a discriminating means for discriminating whether or not a selection has been made, and an open side means for controlling the drive of the main body of the apparatus based on signals from the detecting element and the discriminating means.

[Embodiments of the invention]

The present invention will be specifically described below with reference to the drawings.

FIG. 1 is a schematic front sectional view of an image forming apparatus, such as a copying machine, having an embodiment of a paper feeding device according to the present invention. In the figure, reference numeral 1 denotes a housing of a copying machine, and a photoreceptor 2, such as a selenium drum, which can be rotated in the direction of the first arrow C in the figure is provided approximately in the center of the housing. At the top of the housing 1, there is provided a document table 6 on which a document can be placed and which can be moved back and forth in the directions of the first arrows B and B'. An exposure lamp 4 is provided to irradiate light onto a document placed on a document table 6, and the light can be irradiated from one end of the document to the other by moving the document table B. An exposure device 8 is provided which exposes the surface of the photoreceptor 2 by irradiating the surface of the photoreceptor 2 with light reflected from the original through a first mirror 5, a lens unit 6, and a second mirror 7.

Further, near the photoconductor 2, a static elimination lamp 10 that first removes the surface charge of the photoconductor 2 along the rotational direction of the photoconductor 2, and a charging device 11 that charges the surface of the photoconductor 2 are installed. The surface of the photoreceptor 2, which has been charged after static electricity removal, is exposed by the exposure device to form an electrostatic latent image. A developing device 12 is provided ahead of the charging device 11 to visualize the electrostatic latent image using a developer (hereinafter also referred to as toner). This developing device 1
Reference numeral 2 denotes a toner hopper 16 that stores toner, and a magnetic brush developing device that makes the toner supplied from the toner hopper 16 into a brush shape by a conveying magnet row 214 that rotates in the direction of the first arrow C in the figure and contacts the surface of the photoreceptor 2. 15
It has a spiky structure and is removably disposed within the housing 1.

Further, a paper feeder 2o is provided in front of the developing device 12 for supplying paper to the lower side of the yh receptor 2. The paper feed device 2o includes a paper feed cassette 21 which is detachably attached to the side of the housing 1 and serves as a storage means for storing a plurality of sheets of paper, and a paper feed means which takes out sheets of paper one by one from the paper feed cassette 21. A sixth paper feed roller 22 is provided above the paper feed cassette 21, and a manual paper feed cassette 23 is provided above the paper feed cassette 21, which enables manual paper feeding and cassette paper feeding with one cassette.
is removably provided on the side of the housing 1 via the paper feed mechanism 24 for the manual paper feed cassette, and a second paper feed row 225a that sends the paper sent out from the manual paper feed cassette 23 to the destination. , a slip roller 2 rotates in contact with this
5b, one of the paper feed cassettes 21.
Registration rollers such as aligning rollers 26 and 26 for positioning and conveying the leading edge of the paper sent out from 23 are provided. Further, the paper feeding device 20
There is a transfer charger 27 for transferring the developed image formed on the surface of the photoreceptor 2 onto a sheet of paper conveyed by aligning rollers 26 and 26, and a transfer charger 27 for peeling the paper to which the developed image has been transferred from the photoreceptor. A peel charger 28 is provided as a unit and detachably attached to the housing 1. Further, a cleaning device 2 is provided ahead of the peeling charger 28 to collect and deposit toner remaining on the photoreceptor 2 after transfer.
9 is provided. The static eliminating lamp 1° is arranged along a part of the outer periphery of the photoreceptor in the longitudinal direction and maintained at a constant distance from the surface of the photoreceptor.
installed on.

A suction conveyance device 6 conveys the paper that has been peeled off after transfer.
0 is set. This means that a plurality of flat belt filters 1 provided with a plurality of holes are rotatably connected to guide rollers 32, 32, 32.
A suction duct '56, which is stretched across the flat belt 31 and connected to a suction puller (not shown), is arranged so as to be in contact with a part of the inside of the flat belt.
It is designed to be absorbed and transported.

Further, a heat roller 3 is used to fix the developed image transferred to the paper sheet conveyed by the suction conveyance device 60.
A fixing device 66 made of a 5.35 or the like is provided, and the fixed paper is taken out to an external paper ejection tray 68 via a paper ejection roller 67.

Next, the outline of the paper feeding device 20 will be explained with reference to FIG. 2. FIG. 2 is a sectional view of the paper feeding device. In Figure 2,
The paper feeding device according to this embodiment has a first paper feed device attached to the main body of the device.
The second automatic paper feeding mechanism 24 is provided, for example, in a removable manner on the main body of the apparatus and is capable of selectively selecting between automatic paper feeding and manual paper feeding. The first automatic paper feeding mechanism,! +9 rotates the holding frame 250 that removably holds the paper feed cassette 21, the sixth paper feed roller 22 that feeds out the paper in the paper feed cassette 21, and the sixth paper feed roller 222. A rotating frame 190 that holds the paper movably, and a guide 2 that guides the paper sent out by the paper feed row 222 to the ashining rollers 26 and 26.
It consists of 40. A light source 260 and a light-receiving element 265 are disposed facing each other along the conveying path of the guide 240 to detect the passage of paper.

On the other hand, the second automatic paper feed mechanism (manual paper feed cassette monthly feed 1
64) 24 is detachably arranged to hold a manual paper feed cassette 23 on the upper side of the housing 1. As a paper transport device for this second automatic paper feeding mechanism, paper transport guides 245 and 25 provided within the main body of the apparatus
5, a second paper feed roller 25a and a slip roller 25b for feeding the paper to the aligning row 226.26 via the guide 245. The second paper feed roller 25a is made of white or light-colored rubber that does not contain carbon black. In the manual paper feed cassette 26, there is a paper feed cassette (hereinafter also referred to as a cassette) 16 which is a storage means for automatic paper feed.
0 and above the paper feed cassette 130, a manual feed guide 164 movable in the direction of arrow M or L shown in the figure, and a first paper feed row 296 that serves both automatic paper feed and manual paper feed are arranged.

A manual paper feed switch 168a is provided in front of the second paper feed row 225a, and when the leading edge of the paper fed by the manual guide 164 or a manual guide (not shown) comes into contact with it, A drive source (not shown) or the like is activated to drive the second paper feed row 225a or the like. In addition, as shown in Fig. 2, a manual start switch 1 and 8b are located in front of the aligning rollers 26 and 26.
It has almost the same function as the start button (not shown) of a copying machine, and when the tip of the manually fed navy blue paper comes into contact with it, it starts copying such as exposure, charging, and development. When the process is started, the vapor start detection magnet switch 145B (shown in FIG. 1) is actuated to drive the aligning roller 26.degree. 26, and the timing is determined with the rotation of the photoreceptor 2.

Next, details of the paper feeding device 20 will be explained with reference to FIG. 2 and subsequent figures.

First, detection of the presence or absence of paper in the cassette 21, 130 will be described with reference to FIGS. 2 to 6.

Detection of the presence or absence of paper in the cassette 21 is performed using a sixth paper feed roller 22 that contacts the paper and feeds the paper, and a rotating frame 19 that rotatably supports the sixth paper feed roller 222.
0, an actuator 200 which is rotatably supported by the rotary frame 190, and which rotatably displaces a detection element actuating source, for example, a magnet 201, which has one end in contact with the sheet and is disposed at the other end; The detection element, for example, the magnet 21, which is fixed to the frame 190 and detects the approach of the magnet 201, has a sheet plate 265 on which a sheet is placed, as shown in FIG. Plate 265 is biased upwardly by springs 162,164. This urging force presses the paper on the sheet plate 265 against the sixth paper feed roller. The sheet plate 265 also has an actuator 2 which will be described later.
A notch 265A is provided for escape of 00.

The rotating frame 190, which rotatably holds the paper feed row 222, has a structure shown in FIGS. 2 to 4. FIG. 3 is an exploded perspective view showing the rotating frame 190 and accessories attached thereto, and FIG. 4 is a schematic explanatory diagram for explaining the movement of the rotating frame 190. As shown in FIG. 6, the rotating frame 190 is rotatably supported via bushes 500 and 500 by the drive shaft 115 that supports the second paper feed roller 25a. Further, the rotating frame 190 has a substantially U-shape so as to rotatably support the sixth paper feed roller via a bushing 500 on its side surface, and has an open end of the U-shape turned inward. It is bent to form a protruding end 190A. As shown in FIG. 4, this rotating frame 190
Coil spring 500 unless 1 is installed.
The third paper feed roller 2 is urged in the direction shown by
2 is placed so as to push it upward. Then, when the cassette 21 is installed along the direction E in the figure, the protruding end 190A is pushed by the tip of the cassette 21,
The paper feed roller 22 is set downward so as to come into contact with the paper.

Also. A fulcrum metal fitting 2 is provided near the top surface of the rotating frame 190.
The actuator 200 is rotatably supported via the actuator 10 . The actuator 200 has a rotation fulcrum 20
It has two levers 200b and 20DC in the radial direction from 0a, and when the lever 200b comes into contact with the paper, it is rotatably displaced according to the amount of paper in the cassette 21. . The magnet 201, which is a detection element actuation source, is fixed to the tip of the other lever 200C. 5. As shown in FIG. 2, the rotating frame 190 is provided with a notch 190B, which serves as a relief for the lever 200C. The magnetic detector 205, which is the detection element, is fixed to the upper surface of the rotating frame 190.

The presence or absence of paper in the cassette 21 is detected using the magnet 201.
This is determined by whether or not the magnetism is detected by the magnetic detector 205. When paper remains in the cassette 21, the magnet 201 protrudes upward from the notch 190B of the rotating frame 190 due to the action of the actuator 200, and its magnetism is detected by a magnetic detector. Never. On the other hand, when the paper in the cassette 21 runs out, the lever 200D of the actuator 20[1 has nothing to abut, and the sheet plate 200D in the cassette 21
It is arranged in the notch 265A of No. 5. However, at this time, the actuator 200 is locked to the shaft 22a of the sixth paper feed row 222, as shown in Figure 2. Then, at this time, the magnet 201 and the magnetic detector 205 are arranged to face each other, and accurate detection of the absence of paper is performed.

Conventionally, the actuator has been used as shown in Fig. 5.
A paper detection section 204 (corresponding to the lever 200b) and a magnet mounting section 206 (corresponding to the 1// 200C) are provided at both ends of the 02.
The rotary frame 1 is fixed by a supporting member (not shown).
It was held to avoid the rotation range of 90 degrees. A detection element (not shown) is fixed to, for example, the main body frame.

As described above, according to the conventional example, the shaft 202 is indispensable, and the paper detection section 204. Magnet mounting part 203
Installation requires a precise angle. Therefore, these paper detection units 204. The magnet attachment part 206 had to be integrally molded with the shaft 202. Also,
When installing the detection element, it was essential to carefully adjust the magnetic detection area.

According to this embodiment, by attaching the rotation fulcrum of the actuator 200 to which the magnet 201 is fixed to the rotation frame 190 to which the magnetic detector 205 is fixed, the magnet 201 and the magnetic detector 205 can be mutually connected. The positional relationship of cassette 21
The amount of paper in the paper can be reliably corresponded to, and accurate paper-out detection without false detection can be performed without the need for complicated position setting operations.

Note that the detection element activation source and detection element are not limited to a combination of a magnet and a magnetic detector, but also a combination of a magnet and a reed switch,
A combination of a magnetic material, a proximity switch, a light shielding plate, a photo interrupter, etc. can be considered.

Further, the actuator 200 is supported by the fulcrum metal fitting 21.
0, but may be as shown in FIGS. 6 and 7. 6 and 7 are schematic explanatory diagrams showing other methods of supporting the actuator 200. FIG. As shown in FIG. 6, the actuator 200 is supported by the drive shaft 115 of the second paper feed roller, and the middle part of the drive shaft 115 of the second paper feed roller is connected to a small diameter flexible U115B.
shall be. On the other hand, the fulcrum portion 20OA of the actuator 200 is U-shaped as shown in FIG. 7, and its opening width is made smaller than the diameter of the flexible lug 115B. If the fulcrum portion 20OA of the actuator 200 is attached to the flexible member 115B, the number of parts can be reduced and ease of assembly can be improved.

Note that the detection of the presence or absence of paper in the cassette 130 is performed, for example, by the second
As shown in the figure, by a well-known method, ac f:r--11
A magnet 172 is arranged at 70, and the approach of this magnet 172 is detected by a detection element 174.

Next, the detection of the size of the paper in the force sensor) 21, 130 will be explained with reference to FIGS. 2, 8, and 9.

To determine the size of the paper in the cassette, if a sticker indicating the size is pasted on the side of the cassette in advance when assembling and adjusting the cassette, the operator can use the sticker to detect the size of the paper. However, if the paper size is displayed and visualized by electrical means on the display section of the main body, the operability will be further improved.

In this case, for example, four switches 225 having pins 225a protruding along the insertion direction of the cassette 21 are arranged on the holding frame 250.

A leaf spring 220 is arranged on the distal end surface of the cassette 21 in the insertion direction of the cassette in accordance with the size of the cassette.

21 types of information can be detected depending on the arrangement and presence/absence of this leaf spring.

On the other hand, in the second automatic paper feeding mechanism 24, as shown in FIG.
There is no space between the board and the board to store a board switch, etc. For this reason, in this embodiment, a magnet serving as a detection element activation source is provided at a position corresponding to the size of the paper on the side surface along the insertion direction of the cassette. This will be explained with reference to FIGS. 8 and 9. FIG. 8 is an exploded perspective view of the holding frame 9o and the cassette 130, and FIG. 9 is a sectional view of the detection element. In Figure 8,
A magnet 650 is screwed onto the side surface of the cassette i30.

The number of magnets 650 can be fixed to both sides according to the size.

On the other hand, on both sides of the holding frame 90, notches 90D and screw fixing parts 90C are provided at four locations, two locations each. Then, a printed wiring board 600 on which two magnetic sensing elements (for example, reed switches) 605 are arranged is screwed to the screwed portion 90C. The magnetic sensing element 605 is attached to the wiring side (soldering side) of the printed wiring board 600, but since there is no printed wiring around the switch mounting part, there is no risk of short circuit. Incidentally, if the printed wiring board 600 is provided with an opening that follows the shape of the magnetic sensing element 605, its installation becomes easy.

Further, on the printed wiring board 605.

A hole 600A and two holes 600B are bored at both ends thereof.

A coil cover 610 attached to the insulating surface of the printed wiring board 600 is arranged as a connection for a signal line that conducts with the magnetic sensing element 605 and transmits the detection signal to the main body control section. The protective cover 620 is.

This is to protect the magnetic detection element 605 and printed wiring board 600 from external obstacles. Protective cover 62
0 is provided with escape parts 620C at two places for escaping the magnetic detection element 605, and a hole 620C is provided at one end of the escape part 620C.
20B is bored and a locking portion 620A is provided at the other end. The locking portion 620A of the protective cover 620 is inserted into the hole 600A of the printed wiring board 600 and locked, and then screwed into the screw stopper 90C of the holding frame 90 through the holes 620B and 600B. Stop it. Thereby, the printed wiring board 600 and the protective cover 620 are fixed to the holding frame 90. Note that the protrusion formed by the relief portion 620C of the protective cover 620 does not protrude into the side surface fi11 of the holding frame 90 due to the notch 90D of the holding frame 90, and there is no problem when inserting the cassette 130 (see FIG. 9). reference).

As described above, the magnetic detection element 605 is attached to the holding frame 9
By detecting the presence or absence of the magnet at each position, 2. =16 different paper sizes can be determined.

An example of this is shown in the table.

table The illustrated circle on the garment means the presence of a magnet.

It becomes possible to detect the location, number, and size of the sheets.

Further, according to the above configuration, since the detection section does not include a mechanical operation section, highly reliable paper size detection can be achieved. Further, since the detection element operation source and the detection element are arranged on the side surface along the insertion direction of the cassette 130, in particular, the distal end surface of the cassette 130 and the holding frame 90, like the second automatic paper feed mechanism 24, This is effective when it is not possible to secure a predetermined space between the In addition, the printed wiring board 60
Since the detection element, printed wiring, and connector are provided on the 0, it is only necessary to connect the signal line connected to the 1 main body control section, and the 1 assembly, maintainability, and reliability are improved. Furthermore, due to the presence of the protective cover 620, there is no fear that the electrical part will be damaged.
Since it can be installed at the same time, assembly is easy and the number of parts can be reduced. Furthermore, it is preferable that the four magnets 650 are arranged in a direction perpendicular to the insertion direction of the cassette '130 as in the present embodiment. There is no risk of activating element 605. In this embodiment, the purpose is to detect the paper size in the cassette, but it can also be used simply to detect whether the cassette is inserted or other information about the cassette.

Next, the mounting and holding mechanism for the cassette 21 and the cassette 160 will be explained with reference to FIGS. 10 to 14.

FIG. 10 is a schematic perspective view showing a mounting and holding mechanism for the cassette 21, and FIG. 11 is a schematic explanatory view showing the holding state.

In FIG. 10, the cassette 21 includes protrusions 21B that protrude from both sides along the insertion direction of the cassette. This protruding portion 21B is provided with, for example, fc and q portions 21C that protrude from its lower surface. On the other hand, holding parts 700 are screwed, for example, to both sides of the insertion opening of the holding frame 250. This holding portion 700 includes the protruding portion 21B. The upper surface 700A and lower surface 700B of the holding portion 700 regulate and hold the upper and lower surfaces of the protruding portion 21B. The trench holding part 700 is
The opening end of the upper surface 700A is bent upward, and the opening end of the lower surface 700B is a stepped part 700C for holding the peeled part 21C. , both have spring properties.

With the above configuration, when the cassette 21 is inserted or removed, the holding part 700 also serves as an insertion/removal guide, and as shown in FIG. By adding , it is possible to securely hold the material and obtain a suitable lick feeling.

Conventionally, as shown in FIG. 12, a notch 130B is provided on the bottom surface of the cassette 160, and a leaf spring 150 having a semicircular cross section is disposed inside the bottom surface of the holding frame 90. 150, a proper lick feeling and suppression retention were obtained. but,
A member for regulating the upper and lower surfaces of the cassette 160 must be separately arranged on this platform. That is, cassette 1
30 is held at one end by the holding frame 90, and the other end protrudes from the device and is in a cantilevered state.

According to this embodiment, since the holding part 700 serves as the click part, the pressing holding part, and the regulating part for the upper and lower surfaces of the cassette, the number of parts can be significantly reduced.

As shown in FIG. 10, the above-mentioned paper size detection switch 225 is connected to the board 224 in the holding frame 250.
When the holding frame 250 is assembled, the holding parts 700 . The board 224 is attached as a set of parts.

Next, FIG. 16 shows another embodiment of the cassette mounting and holding mechanism.
This will be explained with reference to FIG. In FIG. 13, the upper and lower surfaces of the protrusion 21B are parallel. Also,
The U-shaped opening end 700D of the holding portion 700 is formed of a flexible member to have spring properties, and is narrower than the width between the upper and lower surfaces of the protruding portion 21B. Also,
The holding part 700 has a plurality of protrusions 700E such as tabs on the contact surface with the holding frame 250, and these are attached to the holding frame 250.
50 hole (not shown) and fixed by a method such as welding or integral molding. Therefore, the portion of the holding portion 700 other than the open end 700D (the illustrated needle line portion) cannot be deformed.

According to such a configuration, when the protrusion 21B is inserted, the open end 700D is further opened due to the spring property, and after the protrusion 21B is inserted up to the rear end, the opening end 700D is opened to the upper and lower surfaces 7.
00A and 700B can be reliably suppressed and maintained.

The cassette mounting and holding mechanism shown in FIG.
A notch 21D of a predetermined width is provided on the upper surface of the holding portion 700, while the lower surface 700B of the holding portion 700 has a length such that it comes into contact with the entire lower surface of the protruding portion 21B, and the upper surface 700A has a stepped portion that comes into contact with the notch 21D. Section 700E is provided. Even with this configuration, it is possible to achieve the same effects as those of the embodiments described above.

Note that this holding portion 700 may be integrally molded with the holding frame 250, or may be fixed with screws.

Next, the first. The second automatic paper feeding mechanism drive system will be explained with reference to FIGS. 15 to 19.

15 to 17 are a top view, a front view, and a rear view, respectively, showing the drive system of the second automatic paper feeding mechanism. In each figure, the holding frame 90 is shown.

It is removably installed in the lower housing IB (see FIG. 1) via the bins 90a and 90b. This holding frame 90
A rotating lever 91A is provided on the outside of the side wall portions 90A and 90B.
91B is rotatably supported, and this rotary lever 91A,
A shaft 92 is rotatably fitted into 91B.

The delivery member and the retention member are provided so that they can move in conjunction with each other. That is, the feed rollers 93A and 93B for feeding paper, for example, the paper feed rollers 93A and 93B of the
It is provided in the middle part of 2 so that it can rotate together with this. Further, retaining members such as guide rollers 94A, 94
A kite roller 94 is provided rotatably on the shaft 92 and is provided at a position outside the paper feed roller and in contact with the inside of the side walls 90A and 90B.
A, 94B and first paper feed rollers 93A, 93B are rotatable in conjunction with each other. There are 91 people on the rotary lever.

91B is a shaft 92 that is biased by tension coil springs 95A and 95B and provided on side wall portions 90A and 90B.
It is adapted to be rotated downward within the relief notches 90A' and 90B'. Further, a drive gear 96 is attached to the fifteenth right end portion of the shaft 92 in the drawing. Further, a post 97 is attached to the side wall portion 90B, and the pivot point of the rotary lever 91B coincides with the axis, and an idle gear 98 and a sprocket 99 that mesh with the drive gear 96 are rotatably attached to the post 97. Ori.

A first spring clutch 100 is provided between the idle gear 98 and the sprocket 99. This first
The spring clutch 100 is connected to the idle gear 98.
A clutch spring 1ooa having a Filf rectangular cross section is fitted into the outer periphery of the boss portion 98a of the sprocket 99 and the boss portion 99a of the sprocket 99, and a first ratchet sleeve having teeth is fitted on the outer periphery of the clutch spring 100a. 100b are fitted together. Incidentally, a raised portion 100a' at one end of the clutch spring 100a
is the engagement hole 10 of the first ratchet sleeve 100b.
0b' is engaged. Further, as shown in FIG. 17, a ratchet hook 101a is swingably provided below the first ratchet sleeve 100b to engage with and disengage from the teeth of the first ratchet sleeve 100b, and one end is attached to a tension coil spring. 101b, and the other end is locked to the teeth of the first ratchet sleeve 100b.

A first solenoid 101c is provided below the ratchet hook 101a, and when this solenoid is activated, the ratchet hook 101a separates from the ratchet sleeper 100b. When disengaged, the clutch spring 100a and the ratchet sleeve 100b are in a free state, so that the sprocket 99 moves as shown in FIG.
When the clutch spring 100a is rotated in three directions, the clutch spring 100a is tightened, and the sprocket 9 is tightened due to the friction between the boss portions 98a, 99a and the inner diameter portion of the clutch spring 100a.
9 is transmitted to an idle gear 98. Furthermore, a sprocket 106 and an idle gear 104 are pivotally supported on the arm portion 90C of the holding frame 90 so that they can rotate together, and a ladder chain 105 for transmitting driving force is stretched between both sprockets 99 and 103. .

Here, the outline of the drive unit including the clutch device inside the housing 1 connected to the idle gear 104 will be explained. In FIGS. 15 and 17, 110 is an aligning roller drive shaft for the aligning rollers 26 and 26, which are registration rollers, and a boss 111 that rotates together with the aligning roller is attached to the end thereof. Inside is a drive gear 112 to which power from a drive source (not shown) is transmitted.
The boss 111 and the sprocket 116 are pivotally supported so that they can freely rotate together.
13, a second spring clutch 114 is provided. This second spring clutch 114 is
It has substantially the same structure as the first spring clutch 100, and when the rotation of the second ratchet sleeper 114a is not restricted, the rotation of the drive gear 112 (the fifteenth
17) is transmitted to the aligning roller drive shaft 110 via the boss 111. Further, in FIGS. 15 and 17, reference numeral 115 is a second paper feed roller drive shaft for the second paper feed rollers 25a, 25a, and a boss 116 that rotates together with this is attached to the end. , the sprocket 11 is connected to the inner side of the sprocket 11 via the ladder chain 117.
A sprocket 118 to which the driving force is transmitted from the boss 116 and a drive gear 120 which transmits the driving force to the idle gear 104 via the intermediate gear 119 are pivotally supported so that they can rotate freely together. A sixth spring clutch 121 is provided between the sprocket 118 and the sprocket 118 . This g3 spring clutch 121
has the same structure as the second spring clutch 114, and when the rotation of the sixth ratchet sleeve 121a is not restricted, the rotation of the sprocket 118 (in the direction of arrow J2 in FIGS. 15 and 17) causes the boss 116 to rotate. The signal is transmitted to the second paper feed roller drive shaft 115 via the feed roller drive shaft 115. Note that the spring clutch 114.1
21, there is a second ratchet sleeper 114a and a third ratchet sleeper 114a.
A ratchet lever 122 that alternately restricts the rotation of the ratchet sleeve 121a is provided so as to be swingable in the directions shown in FIGS. 15 and 17. This ratchet lever 122 and the second ratchet sleeve 114a constitute a first restraining member that restrains the rotation of the second spring clutch 1140. Also.

The ratchet lever 122 and the sixth ratchet sleeper 121a are connected to the sixth spring clutch 121.
This constitutes a second restraining member that restrains zero rotation.

The ratchet lever 122 is biased by a tension coil spring 124, which is an elastic member, so that one end of the ratchet lever 122 locks the second two-chatch sleeve 114a, and when the second solenoid 126 is actuated, It rotates against the biasing force of the tension coil spring 124, so that one end is detached from the second ratchet sleeve 114a and the other end is detached from the third ratchet sleeve 114a.
The ratchet sleeve 121a is locked.

That is, the second solenoid 126 drives the first restraining member composed of the ratchet lever 122 and the second ratchet sleeve 114a to release the restraint by one energization. Also, in this case, the tension coil spring 124 is an elastic material.

The urging force causes the second restraining member to be driven to inhibit.

Moreover, the front side is as shown in FIGS. 15 and 16. That is, an idle gear 125 is rotatably provided on the front side of the drive shaft 115 for the second paper feed row 2, and a one-turn spring clutch 126 is provided outside of the idle gear 125. This is the biasing member 127a
The actuator 127b energized by the sleeve 126.
The protrusion 126b of a.

This actuator 127b is attracted and the protrusion 12
6b, the rotation of the second paper feed roller drive shaft 115 is transmitted to the idle gear 125, causing it to rotate once.

The paper feed solenoid 128 is a flapper type solenoid, and the actuator 12 is a part of the flapper.
7b is made of a vibration damping metal (trade name Silentalloy). The vibration-damping metal is 1, for example, Fe.
-Cr alloy or Fe-Cr-At alloy. Vibration damping metal.

When subjected to an impact, the magnetic domain walls move irreversibly, and the magnetic domain walls have the property of absorbing vibration energy depending on the history of the movement. Further, a drive gear 12 meshing with the idle gear 125
9 is a drive shirt for the sixth paper feed roller 22) 22
．． It is provided so that it can rotate together with a. 6th
The rotational force of the second paper feed roller drive shaft 115 is transmitted to the paper feed roller 22 via a drive gear 129, a one-rotation spring clutch 126, and an idle gear 125.

The rotation timing of the aligning roller 26 must be such that the timing of paper feeding by the aligning roller 26 and the synchronization with the rotation angle of the photoreceptor 2 match more precisely. According to the apparatus of this embodiment, as shown in FIG.
The rotation is performed by the second solenoid 126 which is driven to release the restraint. That is, when the second solenoid 126 is energized, the ratchet lever 122 is disengaged from the ratchet sleeve 114a.

Conventionally, as shown in FIG.
When the excitation current 6 is turned off and the biasing force of the tension coil spring 124 is applied, the ratchet lever 122 is disengaged from the ratchet sleeve 114a. Therefore, the driving of the aligning roller 26 depends on the accuracy with which the second solenoid 126 is turned off. However, even if the excitation current of the second solenoid 12 is turned off, the plunger 123b (first
The magnetic flux remaining in the plunger (as shown in Figure 8) does not instantly become zero, and the attenuation characteristics of the magnetic flux differ depending on variations in the plunger material. Furthermore, it is also influenced by the characteristics of the tension coil spring 124.

The device of this embodiment improves the above-mentioned disadvantages, and since the timing at which the ratchet lever 122 leaves the ratchet sleeper 114a is determined by the timing at which the second solenoid device 126 is turned on, the demagnetization time and the spring characteristics are determined. It is not influenced by variations in the As a result, the timing accuracy of "paper restart" in the aligning roller 26 is increased, and synchronization with the rotation angle of the photoreceptor 2 can be performed with higher precision.However, according to such a configuration, when the main body of the apparatus is driven, , it is necessary to turn on the second solenoid 126 to stop the rotation of the shaft 115. This is because if the protrusion 126b of the one-turn spring clutch 126 is displaced from the normal position, the protrusion 126b will rotate until it comes into contact with the actuator 127b, and the paper feed roller 22 of the whistle 6 will rotate. It is empty. However, this control can be realized by only slightly modifying the flowchart of the main body control section, and there is no problem.

According to this embodiment, the second solenoid 126 and the tension coil spring 124 cause the aligning row 226
Although the rotation of two types of rollers, ie, the second paper feed roller 25a and the like, is driven to prevent rotation, the present invention is not limited to this, and a solenoid may be provided for each roller. In the apparatus of this embodiment, the tension coil spring 124 is provided to enable the interlacing operation, since high precision in the timing of starting the rotation of the second paper feed row 225a, etc. is not required.

The reason why a vibration-damping metal is used for the actuator 127b, which is a part of the seven flaps of the paper feed solenoid 128, is as follows. That is, the paper feed solenoid 128
When the actuator 127b is turned ON, the actuator 127b is sucked and collides with the paper feed solenoid 128, and this is to attenuate the collision sound. The intermittent sound of the paper feed solenoid 128 is the most noticeable impact sound during continuous copying, but
According to the device of this embodiment, a reduction effect of about 4ab was achieved at the impact sound peak. Note that when the vibration-damping metal is magnetized, its vibration energy absorption characteristics deteriorate. Therefore, as shown in FIG. 19, a stopper 128B is provided in a part of the paper feed solenoid 128, and the actuator 127b is connected to the plunger 1.
It is also possible to avoid contact with 28A. In addition, by using the second solenoid 123 as a flapper type solenoid, the device can also have a soundproofing effect.

Next, the manual paper feeding cassette 23 in the second automatic paper feeding mechanism 24 in which manual paper feeding or automatic paper feeding can be selected will be described with reference to FIGS. 20 to 22. FIG. 20 shows a side sectional view thereof, and FIG. 21 shows a top view thereof. In the figure, protrusions 130a, 130a for positioning are attached to both sides of the heaths 90a, 90b.
(see il 5121 and FIG. 16) so that the cassette 130 can be removably positioned and held on the holding frame 90. Further, inside the cassette 160, there is provided a back-up plate 132 on which sheets are placed and which lifts the placed sheets upward in FIG. 20 via a biasing member 161. and cassette 16
A cassette cover 1 that can be opened and closed is located in a part of the upper opening of 0.
A manual feed guide 164 is provided on the upper surface of the cassette cover 166 and is movable along the paper feeding direction by the first paper feed rollers 93A and 93B, that is, the longitudinal direction of the cassette 160. . If this manual guide 164 is moved in the direction of the mark shown in Fig. 16,
The tip 164a of this manual guide is the rotating lever 91A.
, 91B and tension coil springs 95A, 95B in the direction shown in FIG. Only the rollers 93A and 93B come into contact with the uppermost layer of paper in the cassette 1-o. Furthermore, when the manual guide 1 roller 4 is moved in the direction marked M in FIG. 1 paper feed roller 9
3A and 93B are separated from the top layer of paper in the cassette 160. Furthermore, this manual guide 16
4 is in the state shown in FIG. 16, the microswitch 140, which is activated when the shaft 92 comes into contact with the actuator 140a, switches the paper feed mechanism 24 for the manual paper feed cassette as shown in FIG. It is set in.

The output of this microswitch 140 is used as a selection signal for selecting the manual paper feed cassette 26 or the paper feed cassette 21 when the manual paper feed cassette 26 and the paper feed mechanism 24 for this are installed. It will be provided. A pair of regulation guides 135A and 135B are provided on the upper surface of the manual feed guide 1 and 4 to regulate and guide both sides of paper to be manually fed.
is provided to be relatively movable. This is as shown in FIG. 22, which shows the bottom of the manual guide. Handbook guide 1
The regulation guides 135A and 165B are movably arranged in a pair of elongated holes 164A and 134B provided in each regulation guide 135A and 135B.
, 136B are mounted oppositely, and both ranks 166A
, 136B are rotatably supported.

With this configuration, when one regulation guide is moved, the other regulation guide is also moved symmetrically around the pivot point of the pinion 167.
135B width adjustment becomes extremely easy. It should be noted that this introduction paper device 20 can also be equipped with several manual feed dedicated guides (not shown) that are capable of only manual paper feeding in place of the manual paper feeding cassette 26 and its paper feeding mechanism 24. be.

Next, the paper feeding operation in the paper feeding device 20 will be explained with reference to FIG. 26 as well. First, the manual paper feed cassette 26
The operation when the paper feeding mechanism 24 and the paper feeding mechanism 24 for this are attached to the housing 1 will be described. When feeding paper from inside the manual feeding cassette 260 cassette 130, the manual feeding cassette 16
4 in the direction of the arrow as shown in FIG. In this state (the state shown in Figure 1 also shows this state),
As described above, the first paper feed rollers 93A and 95B are in contact with the uppermost layer of paper in the cassette 160. At this time, when a start button (not shown) is pressed, power from a drive source (not shown) inside the housing 1 is applied to the drive gear 112, sprocket 116, ladder chain 117, sprocket 118, drive gear 120, intermediate gear 119, and the idle gear. It is transmitted to sprocket 99 via gear 104, sprocket 106, and rudder chain 105.

The lever 122 disengages the third ratchet sleeve 121a. Then, the rotation of the sprocket 118 is transmitted to the second paper feed rollers 25, 25 via the sixth spring clutch.
transmitted to. At the same time, the first lenoid 101
0 is activated, and the ratchet hook 101a leaves the first ratchet sleeve 100b. In this case, the rotation of the sprocket 99 is transmitted to the idle gear 98 and the drive gear 96 via the first spring clutch 100, and the first paper feed rows 293A and 93B are rotated in the direction of the arrow J in FIG. The paper in the cassette main body 130 is fed out by friction, and the delivered paper is conveyed via the second paper feed roller 25a and the slip roller 25b, and is brought into contact with the nip portion of the aligning rollers 26 and 26. At this time, since the second paper feed roller 25&, which is a transport roller, continues to rotate, the back side of the paper is rubbed by the second paper feed roller 25a. At this time, since the opposing roller of the second paper feed roller 25a is the slip roller 25b, this roller will not slip due to the stiffness of the paper and the paper will not be conveyed. However, during this time, rubber friction marks may remain on the paper due to the friction of the rubber. In particular, since the secondary used black rubber containing carbon black, its stains were noticeable. According to the apparatus of this embodiment, since the second paper feed roller 25&, which is a conveyance roller, is a white or light-colored rubber roller, the friction marks are not noticeable. In addition, in this way, the degree of use of the conveyance rollers becomes easier to disassemble depending on the degree of contamination, so there is an advantage that inspections can be easily performed during periodic inspection and cleaning, and the cleaning effect can also be easily confirmed.

When the vapor start detection magnet switch 145B is activated after the paper reaches the aligning rollers 26, 26, the second solenoid 123 is activated, and the ratchet lever 122 disengages from the second ratchet sleeve 114a, causing the second ratchet sleeve 114a to disengage. 6-2 check sleeve 121a
to lock.

As a result, the rotation of the drive gear 112 is transmitted to the aligning roller drive shaft 110 via the second spring clutch 114, and the alignment roller 26.
26 rotates, and the paper that was in contact with the aligning rollers 26, 26 is conveyed and fed to the transfer charger 27. Next, when manually feeding paper using the manual feed guide 164, the operator moves this manual feed guide 164 into the 16th position.
It is sufficient to simply move in the direction of arrow M shown in the figure. When such an operation is performed, the first paper feed roller 93A,
96B is detached from the top layer of paper in the cassette 130 and can be put into manual paper feeding mode very easily (see Figure 23).
. The paper feeding operation via the manual feed guide 134 is almost the same as the paper feeding operation from the cassette 160. The differences are as follows. First, without pressing a start button (not shown), the leading edge of the paper fed from the manual feed guide 164 operates the manual paper feed switch 138a, thereby operating the second paper feed roller 25a. Further, since the microswitch 140 is not activated, the first paper feed roller 93A,
93B is never driven. Also, when the leading edge of the paper comes into contact with the manual feed start switch 168b, it is exposed and charged.

While the copying process such as development is started, the second
The asining rows 226, 26 are rotated via the spring clutch 114 to feed the paper. If the start button (not shown) is pressed while the manual guide 134 is movable in the direction of the 16th arrow M in the figure, paper will be fed from the paper feed cassette 21. That is, when the start button (not shown) is pressed, the power from the drive source (not shown) inside the housing 1 is transferred to the drive gear 11 in the same way as described above.
2, etc., to the tin rocket 118, and at the same time, the second solenoid 126 is actuated to activate the sprocket 1.
The rotation of No. 18 is transmitted to the second paper feed roller drive shaft 115 (C) via the sixth spring clutch 121.Furthermore, by operating the front six paper feed roller drive shaft 128, the second paper feed roller drive shaft 115 (C) is rotated. The rotation of the drive shaft 115 is controlled by the sixth rotation through the one-rotation spring clutch 126, etc.
is transmitted to the paper feed roller 22 of. As a result, the paper feed roller 22 of S2:S3 is rotated once in the direction of the arrow shown in FIGS. 15 and 16 to feed the paper from the paper feed cassette 2'1. The leading edge of the fed paper is attached to the Ajining Cl-92.
Four of them are produced in the nip of 6 and 26.

After paper feeding starts, the Vapor Star 1/Detection Mag 7 switch 145B (see Figure 1) is activated.
The second solenoid is energized, the ratchet lever I22 leaves the second ratchet sleeve 114a and locks the third ratchet sleeve 121a, and the rotation of the drive gear 112 is caused by the aligning roller drive shaft 110. communicated.

This causes the aligning rollers 26, 26 to rotate, and the paper is conveyed to the transfer charger 27.

If the manual paper feed cassette 23 and its paper feed mechanism 24 are not installed, paper is fed from the paper feed cassette 21 by pressing a start button (not shown) (the details of the operation are the same as described above). Manual paper feeding is performed by inserting paper into a manual feed dedicated guide (not shown) (the details of the operation are the same as the manual paper feeding from the manual feed guide 164 described above).

Next, a display control device in the paper feeder 20 for displaying the cassette selection status and the presence or absence of paper in the cassette will be described with reference to FIGS. 24 and 25. FIG. 24 is a block diagram of the display control device, and FIG. 25 is an analytical diagram showing an example of a display mode.

In the twenty-fourth mode, the microswitch 140 is a determining means for determining whether or not manual paper feeding is selected, and outputs a selection signal. The switch 225 outputs a signal for determining the size of paper in the paper feed cassette 21.

The magnetic sensing element 605 determines the size of the paper in the paper feed cassette 160. Magnetic detection element 205. The detection element 174 outputs a signal for determining the presence or absence of paper in the cassettes 21 and 130, respectively. Also, FIG.

The cassette changeover switch 1028 shown in FIG. This is for selecting and switching the automatic paper feeding of either one of the second automatic paper feeding mechanisms 39 and 24. The output signals of these switches are input to a control means, for example, a display selection control section 151. The display selection control section 151 is configured to display, on the display device 152, the selection status of the cassette, the paper size, and the presence or absence of paper in the cassette on the basis of each of the above-mentioned signals. In this way, the first. Since the second automatic paper feeding mechanism 39.24 can detect the size and presence or absence of paper to be fed automatically, it is possible to improve the operability of automatic paper feeding. Although the second automatic paper feeding mechanism is attached to and removed from the main body of the apparatus, it is preferable that the magnetic sensing element 605 is attached to the main body of the apparatus near the insertion part of the force cera) 130. If this is done, the signal wiring processing of the detection signal is performed only on the apparatus main body side, so that the manual paper feed cassette 26 can be attached or detached without having to attach or detach the signal wiring.

Further, the display control means 151 is mentioned as an example of the control means of the main body device, and the above-mentioned signals can also be provided for other controls than display control. for example,
Since the paper conveyance timing differs depending on the paper size and the insertion direction, this timing control can also be provided.

Next, an example of display control by the display control means will be explained with reference to FIG. 25. In FIG. 25, display panel 10
On the DD, the cassette changeover switch 1028 and a display section 1001, such as a liquid crystal display, are arranged.

In the display section 1001, reference numeral 1010 indicates that manual insertion is possible, and it lights up when the microswitch 140 is turned on.

1012.1014.1016 and 1018 are displays indicating the paper size, respectively.1 In this example device, A3
．． A41B4. Each size of B5 is displayed. these are. Displayed based on the signal from the switch 225 or the magnetic sensing element 605.

Reference numeral 1026 displays a display indicating the direction in which the paper is inserted. For example, when horizontally feeding paper size A4, the A4
Assuming that only the N indicator 1o14 lights up, when paper size A4 is being fed vertically, the A4 indicator 1014 and the R indicator 1o2 will light up.
6 lights up at the same time.

This discrimination between horizontal feeding and vertical feeding is also carried out by distinguishing the detection element actuating source of the cassette. 1020.

1022 and 1o24 are respectively second automatic paper feeding mechanisms 24. This is a display showing the first automatic paper feeding mechanism 39 and the main body of the apparatus, which are the cassette 21 or the cassette 1.
This is used to display when there is no paper in any of the 3o's.

The display operation on the display unit 1001 as described above will be explained. First, we will explain the state in which the manual paper feed cassette 26 is installed in the main body of the apparatus and the manual feed guide 134 is not pushed in. Note that the cassette 21 is a cassette that stores A6 paper. , the cassette 160 is A
4. A cassette that stores vertically fed paper. in this case,
Since the micro 2 switch 140 in FIG. 17 is not turned on, the hand pressure possible display 1010 does not light up. Further, the cassette 21 and the cassette t13. The paper size information in o is determined by the display selection control unit 151 according to the operation described above.
Enter. Here, during standby after the power of the main body is turned on, first, the paper size in the cassette 21 is displayed with priority, and the A6 display 1012 is lit on the display section 1001.

If the cassette 21 is empty, the display 1020, 1
022 and 1024 are displayed, and only 1022 is displayed blinking.

If the cassette Kirimata switch is 1028kO1lL,
Display 1014 and R indicating that it is an A4 vertical feed cartridge
Display 10126 lights up. If cassette 160 is empty, display 1020.

1022 and 1024 are displayed and 1020 Tsuchi1
When 028 is turned ON again, the display 1012, which is the A3 display, lights up.

Next, the display section 1001 with the manual guide pushed in
The display operation will be explained below. In this case, microswitch 140 is turned on. Therefore, immediately after the main power is turned on, displays 1010 and 1012 light up at the same time to indicate that paper feeding in the cassette 21 and manual paper feeding are possible. At this time, if the inside of the cassette 21 is empty, the same display as above is performed. Cassette selection switch 102
When 8 is pressed, the size of the cassette 130 is not displayed, and only the display 1010 lights up to indicate that only manual paper feeding is possible.

Next, a case will be described in which the paper feed mechanism 24 for the manual paper feed cassette is not attached to the main body of the apparatus.

In this case, the manual paper feed cassette 26 is attached to the receiving part 1 in the main body of the apparatus.
The display for 001 is display 1012 and manual feed possible display 10.
10 lights up.

Since such a display is performed, the size display of the upper and lower cassettes can be easily understood and operability is improved. Also, Kasetsu) 21
, 130 can be easily checked. moreover,
Switching between manual paper feeding and automatic paper feeding can be easily confirmed and operation errors can be reduced.

〔Effect of the invention〕

As described above, according to the present invention, it is possible to provide a paper feeding device that can simply and reliably detect cassette information and the selection of automatic paper feeding or manual paper feeding, and provide the information for main body control. Moreover, this paper feeding device is the first one. Since a second automatic paper feeding mechanism can also be provided, the demand for using the cassette can be appropriately met. Further, since the second automatic paper feeding mechanism can be detachably attached to the main device, it is possible to provide a paper feeding device that meets the user's needs.

Furthermore, by providing the cassette information detection unit in the detachable second automatic sheet feeding mechanism on the main body side, wiring processing can be done on the main body side, thereby eliminating the burden on the operator.

Further, by displaying cassette information and the like using the control means as display selection means, the operator can clearly grasp the usage situation and improve operability.

[Brief explanation of drawings]

FIG. 1 is a schematic front sectional view of an image forming apparatus, such as a copying machine, having an embodiment of the paper feeding device of the present invention, FIG. 2 is a sectional view of the paper feeding device, and FIG. 6 is a rotating frame and its FIG. 4 is a schematic explanatory diagram for explaining the movement of the rotating frame; FIG. 5 is a schematic perspective view of a conventional paper presence/absence detection means; FIG. 6; Fig. 7 is a schematic explanatory diagram showing other support means for the actuator, Fig. 8 is an exploded perspective view of the holding frame and the cassette, Fig. 9 is a sectional view of the detection element, and Fig. 10 is the cassette mounting and holding mechanism. FIG. 11 is a schematic explanatory diagram showing a cassette holding state, No. 12rZ is a schematic explanatory diagram showing a conventional cassette mounting and holding means, and FIGS. 16 and 14 are other cassette mounting and holding means. A schematic perspective view showing an example, FIG. 15 is a schematic top view of a paper feeding mechanism for a manual paper feeding cassette, FIG. 16 is a schematic front view of the same, FIG. 17 is a schematic rear view of the same, and FIG. 18 is a conventional A schematic rear view of the feed M mechanism for the manual paper feed cassette, FIG. 19 is an explanatory diagram showing the soundproofing means of the flapper type solenoid, FIG. 20 is a partial side sectional view of the manual paper feed cassette, and FIG. 21 is a 22 is a detailed explanatory diagram of the same portion, FIG. 26 is a partial operational explanatory diagram of the paper feeding device, FIG. 24 is a diagram showing the display control section, and FIG. 25 is a schematic explanatory diagram of the display panel. be. 24... Second automatic paper feeding mechanism (paper feeding mechanism for manual paper feeding), 39... First automatic paper feeding mechanism, 140
. . . Discrimination means (microswitch) 151 . . . Display selection control unit, 174 . paper out detection element of automatic paper feeding mechanism), 225...
Switch (paper size detection element of first automatic paper feeding mechanism)
, 605... Magnetic detection element (paper size detection element of M2 automatic paper feeding mechanism) 1028... Cassette changeover switch. Figure 7 115B Figure 19 Figure 20/Continued from page 1 0 Inventor Koji Kubo Inside Yanagimachi Factory, Tokyo Shibaura Electric Co., Ltd., 70 Yanagimachi, Saiwai-ku, Kawasaki 0 Inventor Hiroshi Aoya 0 Inventor Ashi Kobayashi 70 Yanagimachi, Saiwai-ku, Kawasaki City, Tokyo Shibaura Electric Co., Ltd. Yanagimachi Factory

Claims (1)

[Scope of Claims] (1) In a paper feeding device in which manual paper feeding and automatic paper feeding can be selectively selected, a detection element actuation source disposed in a paper feeding cassette that is detachably attached to the automatic paper feeding mechanism; , a detection element actuated by the detection element activation source, a determination means for determining whether manual paper feeding is selected, and a control means for controlling drive of the apparatus main body based on signals from the detection element and the determination means. A paper feeding device characterized by having: (2) The automatic paper feeding mechanism includes a first automatic paper feeding mechanism that only performs automatic paper feeding, and a second automatic paper feeding mechanism that can selectively select between manual paper feeding and automatic paper feeding. 2. The paper feeding device according to claim 1, wherein the paper feeding device has an automatic paper feeding mechanism and is capable of selectively selecting one of the automatic paper feeding mechanisms. (6) The paper feeding device according to claim 2, wherein the second automatic paper feeding mechanism is detachably attached to the main body of the device, and the detection element is attached to the main body of the device. . (4) The control means is display selection control means. The paper feeder according to claim 1 or 2, characterized in that the size of paper sheets and the selection display of automatic paper feeder 9 and manual paper feeder are controlled based on the signals from the detection element and the discrimination means. paper equipment. (5) When manual paper feeding is not selected in the second automatic paper feeding mechanism, the display control means displays the size of the selected paper sheet to be supplied to the first and second automatic paper feeding mechanisms. If manual paper feeding is selected and the first automatic paper feeding mechanism is selected, the size and manual feeding of the paper sheets to be fed to the first automatic paper feeding mechanism are displayed, and manual feeding is performed. The paper feeding device according to claim 4, wherein when paper feeding is selected and the second automatic paper feeding mechanism is selected, the paper feeding device is controlled to perform only manual feeding display. . (6) The control means includes the first control means. When the second automatic paper feed mechanism is attached to the filter paper storage cassette and a signal indicating the presence or absence of paper sheets in the filter paper storage cassette is input, and a signal indicating that there are no paper sheets is input, the two cassettes are displayed and the filter paper storage cassette is displayed with no paper sheets present. A patent featuring a flashing display of the cassette of