JPH0414350B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a copying apparatus that is a combination of a table-top copying machine and a paper feed rack.

Conventionally, in desktop copying machines, the means for placing copy paper (hereinafter referred to as "paper") has generally been a cassette or paper feed stand installed in the copying machine itself, but the number of sheets that can be loaded is small and paper needs to be replenished frequently. I have to do it,
Furthermore, when it is desired to change the size of paper, it is necessary to replace the cassette or remove the paper on the paper feed tray and place paper of the new size to be used. For this reason, efforts have been made to increase the number of sheets that can be loaded using a two-stage cassette for feeding paper, and to save the trouble of changing paper by setting cassettes for different paper sizes.
Since the copying machine itself is small, the number of paper sheets it can load is not sufficient. Recently, small desktop copying machines have become faster in copying speed and can now make multiple copies.
Insufficient number of sheets of paper is becoming more and more of a problem.

In order to solve this problem, we have installed a paper feed cassette and paper feed table (first paper storage section) installed in the main body of the tabletop copier, for example, in the stand on which the main body of the copier is placed. A second paper storage section capable of accommodating a large amount of paper of frequently used sizes is provided, and the paper fed from this mount (hereinafter referred to as a paper feed mount) is provided on the underside of the main body of the tabletop copying machine. A copying device that led into the machine from an inlet to make copies was published in Japanese Patent Publication No.
It is disclosed in Publication No. 56-8161.

However, in such a copying device, the paper transport path from the second paper storage section mentioned above is long and complicated, so when the paper from the paper feed mount causes a paper jam called a jam. It was difficult to remove the paper. In other words, when unjamming paper like this, the jammed paper is usually removed by opening the paper guide upwards and sideways, or sliding it toward you, but space is limited and the open section is There was a problem in that it was difficult for the operator to reach in and remove the jam paper because the paper was narrow. In addition, if a jam occurs in the area between the paper feed mount and the inlet of the copying machine main body or in the vicinity, it is difficult to approach the jammed paper from either the copy machine main body side or the paper feed mount side, and the jammed paper The problem was that it was particularly difficult to remove.

This invention was made in view of the above problem, and in a copying machine consisting of a copying machine main body and a paper feed rack, even if the paper fed from the paper feed rack generates a jam, it can be easily fixed. An object of the present invention is to provide a copying device capable of removing jam paper.

In order to achieve such an object, the copying apparatus of the present invention includes a first paper accommodating section and a first paper accommodating section for introducing the paper fed from the first paper accommodating section into an image transfer section. a copying machine main body having an inlet and a second paper inlet for introducing paper supplied from outside the main body into the image transfer section; a second paper storage section for storing paper; a paper feeding means for feeding the paper in the paper storage section to the second paper introduction port; a support section for rotatably holding the copying machine main body; and a biasing member for biasing the copying machine main body. and a sheet feeding pedestal having a means for rotating the copying machine main body around the support part by urging by the urging means to separate the copying machine main body and the paper feeding pedestal. Features.

The copying apparatus of the present invention will be described in detail below with reference to the drawings. FIG. 1 is a diagram showing the configuration of one embodiment of a copying apparatus according to the present invention. In FIG. 1, a copying machine main body 1 is mounted on a paper feed mount 2. As shown in FIG. Copy machine body 1
In normal operation, when a sheet-shaped original 3 is placed on an inclined original table and inserted into the original feeding device from the direction of arrow A, it is fed by conveying rollers 4 and 5, and during this time it is illuminated by an illumination lamp. The original image is projected onto the rotating photosensitive drum 7 by the fiber lens array 6. Photosensitive drum 7 is indicated by arrow B
After rotating in the direction and being neutralized by the static elimination lamp,
The document is uniformly charged by the corona charger 9, and the document image is formed as an electrostatic latent image on the photosensitive drum 7 by the above-mentioned light image irradiation. This electrostatic latent image is developed by a toner developing device 10 with toner charged to the opposite polarity to that of the original image, and then transferred to a toner image transfer section 11 as the drum 7 rotates. on the other hand,
Recording paper cassette 1 as a first copy paper storage section
The sheets 13 in 2 are taken out one by one by a swinging and rotating pick-up roller 14, and sent through a first introduction port formed by two guides 15 to registration rollers 16, which are sheet feeding control means. . The registration roller 16 feeds the paper 13 to the transfer section 11 at a timing that coincides with the developed image on the photosensitive drum surface. The paper 13 is transferred to the transfer unit 11.
The toner image is transferred by being conveyed between the drum 7 and a semiconductive transfer roller 17 to which a bias voltage is applied so as to overlap the toner image. At this time, the paper is conveyed in close contact with the toner image, that is, the drum 7, so it is peeled off by a peeling claw 18 and an air flow to be described later, and is conveyed along a guide 19, and is heated by a roller 20 with a heater. Fuser 21
After fixing the toner image thereon, the paper is discharged onto a paper discharge tray 23 by a discharge roller 22. drum 7
The upper toner image is not completely transferred to the recording paper and a portion remains on the drum, so the remaining toner is brushed away by the rotating cleaning brush 24, and the removed toner is removed by the rotation of the fan 25. and collected by a filter 26.
The exhaust air from the fan 25 is guided to a duct 27, and the discharge port of the duct 27 is exposed to the transfer section 11, and is used to effectively peel the recording paper from the drum 7 in cooperation with the peeling claw 18. Reference numeral 28 denotes an opening provided on the lower surface of the copying machine 1, through which paper is fed from the paper feed mount 2, which will be described later, to the two guides 29.
and is guided to the registration roller 16 by a guide 29. 30, 31
are the legs that support the copying machine.

Next, the configuration of the paper feed mount 2 used in combination with the copying machine main body 1 will be explained. This paper feed rack 2 can accommodate a large number of sheets of paper, and can supply the paper to the second introduction port through the opening 28 of the copying machine main body 1 described above. A paper stacking table 32 serving as a second copy paper storage unit and capable of stacking and accommodating a large number of sheets 13 is supported by a belt 33 and can move up and down. A belt 33 whose one end is fixed to the paper mounting table 32 is hung around an idler pulley 34, and the other end is fixed to a winding pulley 35. The hoisting pulley 35 is connected to a worm wheel 36, and a worm 37 meshed with the worm wheel 36.
The belt 3 is driven by the motor 38.
3 can be rolled up or unrolled, and thereby the paper mounting table 32 can be moved up and down. The idler pulley 34 , the winding pulley 35 , the worm wheel 36 , the worm 37 and the motor 38 are connected to the paper tray outer frame 3 surrounding the paper tray 32 .
Attach to 9. The mounting table outer frame 39 has two rails 4
It is attached to the main body of the paper feed mount 2 so that it can slide toward the front side with the 0. In order to take out the sheets of paper 13 placed on the paper mounting table 32 one by one, the paper mounting table 32
A pick-up roller 41 is disposed above. This pick-up roller 41 can be rotationally driven by a motor 43 via a belt 42, and is also rotatable about a fulcrum 44, and is in contact with the upper surface of the paper 13 due to its own weight. The position of the pick-up roller 41 is detected by a detector (not shown), and when the pick-up roller 41 falls below a predetermined level, the motor 38 is driven by a signal from a control circuit (not shown), and the pick-up roller 41 is moved to a predetermined position. The paper mounting table 32 is raised until it is above the level of .
By keeping the position of the pick-up roller 41 in contact with the paper 13 constant in this manner, stable paper feeding can be performed at all times.

Next, a mechanism for feeding the paper 13 housed in the paper feed mount 2 to the copying machine main body 1 will be explained. When a paper pick-up signal from the copying machine main body 1 is input to a control circuit (not shown), a drive signal is sent from the control circuit to the motor 43, and the motor 43 rotates the pick-up roller 41 for a certain period of time to remove the top layer of paper. Send out one piece of 13. Paper sent out 1
3 is guided by the guide 45, passes through the opening 28 of the copying machine main body 1, is further guided to the second introduction port formed by the guide 29, reaches the registration roller 16, and stops. Thereafter, the paper 13 is sent to the transfer section 11 by the registration rollers 16 at a timing that coincides with the developed image on the photosensitive drum surface.
Thereafter, copying and fixing are performed in the same manner as described above, and the sheet is discharged onto the paper discharge tray 23.

Next, a mechanism for holding the copying machine main body 1 on the paper feed mount 2 will be explained. The tray 46 has a semi-cylindrical bottom surface and a recess into which the legs 30 can fit, and is rotatably fitted onto the upper surface of the paper feed mount 2.
The legs 30 of the copying machine main body 1 are rotatably fitted and held. On the other hand, the receiving tray 47 has a recess into which the foot 31 is fitted and held, and the bottom thereof is connected to a spring balancer 48. The legs 31 are fitted into the receiving tray 47 and screwed to the copying machine main body 1. saucer 4
A spring balancer 48 connected to 7 serves to support part of the weight of the copying machine main body 1. With this configuration, as shown in FIG.
It is now possible to create a large opening between the copying machine main body 1 and the paper feed cradle 2, centering on the paper feed cradle 2.If the paper fed from the paper feed cradle 2 becomes jammed, the copy machine body 1 can be lifted up and the paper feed cradle 2 By opening a portion of the engaging portion, jamming can be easily performed without getting your hands dirty. Normally, when operating the copying machine main body 1,
For example, if the height of the copying machine body 1 is 350 mm, the height of the pedestal is generally required to be about 500 to 700 mm. It is possible to store approximately 5 to 10 times more paper than the conventional copying machine, and it is also possible to provide a mechanism for feeding paper into the main body of the copying machine in a timely manner and a drive control circuit for these. It is also possible to incorporate a tempering device to keep copy quality constant. When replenishing or replacing paper on the paper feed mount 2, when the front door (not shown) is opened, a detector (not shown) detects that the door has been opened, and the motor 3 is activated.
8 is reversed and the paper mounting table 32 is lowered. Next, by releasing a slide lock lever (not shown) and pulling out the outer frame 39 of the mounting table, sheets can be easily replenished or replaced. When the mounting table outer frame 39 is returned to its original position, the slide lock lever is locked and the door is closed, the detector on the door is activated and the motor 38 rotates forward to raise the paper to a position where it contacts the pick-up roller 14 and waits. .

Whether the paper 13 is fed from the cassette 12 or from within the paper feed rack 2 is determined by a changeover switch (not shown) provided on the paper feed rack. At this time, the pick-up roller 14 of the copying machine main body 1 and the paper feed mount 2
The pickup roller 41 is controlled so as to interlock with each other. An example of a circuit for performing this control will be explained with reference to FIG. The output terminal of the control circuit 49 in the copying machine main body 1 is connected to one of the input terminals of an AND circuit 50 and an AND circuit 51, respectively. The output terminal of the AND circuit 50 is connected to the operating mechanism 52 of the pick-up roller 14 in the main body 1 of the copying machine, and the output terminal of the AND circuit 51 is connected to the operating mechanism 53 of the pick-up roller 41 in the paper feed mount 2. The changeover switch 54 provided on the paper feed frame 2 is connected to the other input terminal of the AND circuit 50, and the
Connected to the other input terminal of the AND circuit 51. A high level signal can be supplied from one terminal 56 of the changeover switch 54, and a low level signal can be supplied from the other terminal 57. The changeover switch 54 is connected to the cassette 12 in the copying machine main body 1.
When paper is to be fed from within the paper feed rack 2, the switch is switched to the terminal 56 side, and when paper is to be fed from within the paper feed mount 2, the switch is switched to the terminal 57 side. A high-level paper feed signal is generated from the control circuit 49 in the copying machine main body 1 at the timing when the paper 13 is fed from the cassette 12 in the copying machine main body 1. If the selector switch 54 is switched to the terminal 56 side, when a high level signal is output from the control circuit 49,
A high-level signal is input to both input terminals of the AND circuit 50, and a high-level operating signal is supplied from the output terminal of the AND circuit 50 to the operating mechanism 52, so that the pick-up roller 14 is operated. At this time, the signal sent from the changeover switch 54 to the AND circuit 51 is turned into a low-level signal by the inverter 55, so a high-level operation signal is not output from the output terminal of the AND circuit 51, and the pick-up roller 41
doesn't work. In addition, changeover switch 54 is connected to terminal 5.
When switching to the 7 side, the changeover switch 54
The signal sent to the AND circuit 50 becomes a low level signal, and the signal sent to the AND circuit 51 becomes a high level signal. As a result, when a high level signal is sent from the control circuit 49, a high level activation signal is output from the AND circuit 51, and a high level activation signal is not output from the AND circuit 50. For this reason, the pick-up roller 14 in the copying machine 1 does not operate, and only the pick-up roller 41 in the paper feed rack 2 operates. With the above configuration, the paper feed mount 2
By switching the changeover switch 54 provided at
It is possible to easily select whether to supply from within. In addition, the pick-up roller 1 on the side of the copying machine main body 1
4 and the registration roller 16.
Pick up roller 41 and registration roller 1 inside
6, the diameter of the pick-up roller 41 may be increased by the ratio of both distances, or the driving speed of the motor 43 may be increased.

As described above, according to the present invention, since it is possible to separate the copying machine main body and the paper feed mount, even if paper fed from the paper feed mount becomes jammed, the jammed paper can be easily removed. be able to.

[Brief explanation of drawings]

FIG. 1 is a diagrammatic sectional view showing the configuration of an embodiment of the copying apparatus of the present invention, FIG. FIG. 2 is a diagram illustrating the configuration of an example of a circuit that selects paper supply. 1...Copying machine main body, 2...Paper feed mount, 3...Document, 4, 5...Transport roller, 7...Photosensitive drum,
8... Static elimination lamp, 9... Corona charger, 10...
... Toner developing device, 11 ... Toner image transfer section, 12
... Cassette, 13 ... Paper, 14 ... Pick up roller, 15 ... Guide, 16 ... Registration roller, 17 ... Transfer roller, 18 ... Peeling claw,
19... Guide, 20... Roller, 21... Heat fixing device, 22... Output roller, 23... Output tray, 24... Cleaning brush, 25... Fan, 26... Filter, 27... Duct , 28...
...Opening, 29...Guide, 30, 31...Legs, 3
2...Paper loading table, 33...Belt, 34...Idler pulley, 35...Hoisting pulley, 36...
Worm wheel, 37... Worm, 38...
Motor, 39... mounting table outer frame, 40... rail,
41... Pick-up roller, 42... Belt,
43... Motor, 44... Fulcrum, 45... Guide, 46, 47... Receiver, 48... Spring balancer, 49... Control circuit, 50, 51...
AND circuit, 52, 53... Operating mechanism, 54...
Changeover switch, 55...Inverter, 56,5
7...Terminal.

Claims (1)

[Claims] 1. A first paper storage section, a first paper introduction port for introducing the paper fed from the first paper storage section into the image transfer section, and a first paper introduction port for introducing the paper fed from the first paper storage section into the image transfer section; a copying machine main body having a second paper introduction port for introducing paper into the image transfer section; a second paper storage section for storing paper;
a paper feeding means for feeding the paper in the paper storage section to the second paper introduction port; a support section for rotatably holding the copying machine main body; and a biasing member for biasing the copying machine main body. and a sheet feeding pedestal having a means for rotating the copying machine main body around the support part by urging by the urging means to separate the copying machine main body and the paper feeding pedestal. Characteristic copying device.