JPS5828566B2 - copying device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a copying apparatus that feeds a sheet material such as photosensitive paper to an exposure position to make copies.

Conventionally, in copying machines that feed photosensitive paper to an exposure position and record the original image on the photosensitive paper, a detector detects when the photosensitive paper that has been fed to the exposure position reaches a predetermined position. The conveyance of the photosensitive paper is stopped in response to an output signal, then exposure is performed, and after the exposure is completed, the photosensitive paper is fed again to eject the photosensitive paper from the exposure position.

This exposure position refers to the position where the image of the original is projected.

In such copying machines, a special detector is installed to position the sheet material, which complicates the structure of the machine, and when using multiple photosensitive papers of different lengths, the detector must be installed. A plurality of devices must be provided, which makes the device more complicated and expensive.

The present invention solves the above-mentioned drawbacks and provides a copying apparatus that can easily position a sheet material at a predetermined position and easily eject it without providing a special detector.

In the present invention, photosensitive paper, a manuscript, etc. can be used as the sheet material.

When using an original, the original is illuminated at an exposure position, and an image of the illuminated original is projected onto a photoreceptor.

The exposure position in this case refers to the position where the original is illuminated.

The present invention will be explained below based on the drawings.

FIG. 1 shows a microfilm reader printer, in which a lighting device 5 having a light source 2, a condensing lens 3, and a reflecting mirror 4 is arranged at the bottom of a main body 1.

The microfilm F is sandwiched between two transparent plates arranged on the film carrier 6.
By moving the microfilm back and forth and left and right, a desired image on the microfilm can be positioned between the projection lens 1 and the illumination device 50.

The image light of the microfilm illuminated by the illumination device passes through a projection lens 7, is reflected by a half mirror 8, and is directed toward a transmission screen 9 disposed on the front surface of the main body 1.

Therefore, by moving the film carrier 6, a desired image in the microfilm can be selected and projected onto the screen for observation.

A paper feeding device 10 is arranged inside the main body 1, and electrophotographic photosensitive paper P coated with zinc oxide is loaded into this paper feeding device in a horizontally or vertically long manner.

As shown in FIGS. 2 and 3, the paper feeding device 10 has a reference frame 11. ．． 12. , movable paper holding plates 11, 12 having claws 112, 12□, and racks 13, 14 are fixedly installed behind the paper holding plates 11, 12, respectively.
An idler gear 15 is rotatably arranged between the four.

Therefore, when the paper holding plate 11.12 is moved in the opposite direction, the idler gear 15 rotates and the reference frame 11.12 is moved in the opposite direction. ．． The length between 121 can be adjusted according to the width of the photosensitive paper.

When loading photosensitive paper of the same size horizontally, spread the paper holding plates 11 and 12 horizontally to match the width of the photosensitive paper, and spread the reference frame 11. ．． 12, to the position shown in Figure 2.

In addition, when loading the same photosensitive paper vertically, the paper holding plate 1
1.12 are narrowed from side to side to match the width of the photosensitive paper, and the reference frames 111, 12. is moved to the position indicated by the broken line 11'1, 12'1.

When this paper is loaded into the paper feeder, the lower end of the photosensitive paper engages and is supported by the support plate 16 or 17, thereby positioning the photosensitive paper in the vertical direction.

One support plate 16 engages with the lower end of photosensitive paper when it is loaded horizontally, and the other support plate 17 engages with the lower end of the photosensitive paper when it is loaded vertically.

A spring 18 is attached between the paper holding plates 11 and 120, and a pressure plate 19 for receiving the photosensitive paper is fixed to this spring 18.

The photosensitive paper P is pushed up from the back side of the pressure plate 19 by a spring 18, and a claw 11□ provided at one end of the reference frame is applied regardless of the number of sheets of photosensitive paper loaded.

122 and the paper feed roller 20 that feeds the photosensitive paper.

The paper feed roller 20 is fixed to a rotating shaft 21, and the rotating shaft 21 is connected to a drive motor via a clutch mechanism (not shown).

The lateral ends of the photosensitive paper P engage with friction members 22 and 23, and the friction members 22 and 23 are attached to levers 222 and 232, respectively, which are urged toward the photosensitive paper by springs 221 and 231.

One friction member 22 engages with both sides of the photosensitive paper when the photosensitive paper is loaded horizontally, and the other friction member 23 engages with both sides of the photosensitive paper when the photosensitive paper is loaded vertically. This is to ensure that one sheet of photosensitive paper is fed.

When the paper feeding roller 20 is rotated, a sheet of photosensitive paper is fed from the paper feeding device 10, passes through a guide plate 251, and then is sent to a pair of feeding rollers 24, and then is sent to the guide plate 251.
52 and is sent to the charger 26.

The charger 26 uniformly charges the photosensitive paper to impart photosensitivity.

A paper holder 27 that holds the photosensitive paper at the exposure position and a developing device 2
A pair of feed rollers 29 that feed the charged photosensitive paper from the charger 26 to the exposure position and a pair of feed rollers 8 that feed the charged photosensitive paper from the exposure position after exposure and feed it to the developing device. feeding rollers 30 are arranged before and after the exposure position.

The paper holder 27 includes a suction plate 31 formed in a hollow thin box with suction holes on the surface on the exposure side, as shown in FIGS. 1 and 4.
and a suction fan motor 32 attached to the back surface of the suction plate 31.

A stop frame 33 for regulating the movement range of the suction plate 31 is fixed on the back side of the suction plate 31, and the stop frame 33 is pulled leftward in FIG. 3 under the action of a return spring 34 whose one end is attached to the main body. , at this time, one end of the stop frame 33 is connected to the support plate 34 inside the main body.
The suction plate 31 is engaged with a stopper 35 fixed to the feed roller 29, and the suction plate 31 is positioned near the feed roller 29.

A rank 36 is fixed to the back of the suction plate 31, and this rack 3
6 is engaged with a gear 39 fitted onto a rotating shaft 37 via a slip mechanism 38, and a sprocket gear 41 is attached to one end of the rotating shaft 37 via an electromagnetic clutch 40.

The suction plate 31 has a shape in which a corner portion at the tip thereof is cut out, and an auxiliary feed roller 42 fixed to a rotating shaft is disposed at a position facing the cutout portion 311 .

The auxiliary feed roller 42 is in pressure contact with a roller 46 rotatably disposed in the → direction of a lever 45 which is urged by a spring 43 to rotate clockwise.

An endless chain 49 is stretched between sprocket gears 47 and 48 fixedly attached to the rotating shafts of feed rollers 29 and 30 for feeding the photosensitive paper, and another sprocket gear 41.

The chain 49 is driven by a drive motor which will be described later.
While the drive motor is driving, the feed rollers 29 and 30 rotate, and the auxiliary roller 42 rotates only while the electromagnetic clutch 40 is operating.

Note that it is of course possible to stop the rotation of the feed rollers 29 and 30 normally, like the auxiliary rollers, instead of constantly rotating them, and to start rotating the feed rollers before the photosensitive paper reaches the feed rollers. .

The charged photosensitive paper is sent to an exposure position by a feed roller 29, and when it is sent to a suction plate 31, a fan motor 32
As a result of the operation, the back surface of the photosensitive paper is attracted to the exposed paper side surface of the suction plate 31.

When the photosensitive paper is further fed to the exposure position by the feed roller 29, the photosensitive paper advances along the surface of the suction plate 31, and when the trailing edge of the photosensitive paper passes the feed roller 29, the photosensitive paper is sucked by the suction plate 31. It automatically stops and is placed at a predetermined exposure position.

At this time, since the suction plate has a shape in which the length in the photosensitive paper feeding direction is shorter than that of the photosensitive paper, the photosensitive paper P is placed horizontally in the vertical paper feeding device 10 at a position where the leading edge of the photosensitive paper P protrudes about 1 Crrl from the suction plate 31. 4, the photosensitive paper P stops at the position where the leading edge of the photosensitive paper P protrudes from the tip notch 31 of the suction plate, and the paper feeder 10
When the same photosensitive paper is loaded in a vertically long manner, the photosensitive paper P' stops at a position where the leading edge of the photosensitive paper P' protrudes from the end of the suction plate near the developing device.

The paper holder 27 is configured to reciprocate between the feed rollers 29 and 30.

That is, when the electromagnetic clutch 40 is activated after exposure, the rotating shaft 37 is rotated via the electromagnetic clutch 40 by the chain 49 that is constantly driven, thereby rotating the gear 38 and the auxiliary roller 39.

As the gear 380 rotates, the rack 36 that meshes with it moves to the right, and therefore the suction plate 31 moves toward the developing device.

The tip of the photosensitive paper protruding from the suction plate 31 is attached to the auxiliary roller 4.
When the suction plate 31 moves to a position where it is inserted between the rollers 46 and 2, the other end of the stopper frame 33 engages with the stopper 35, so that the gear 39 does not rotate due to the slip of the slip mechanism 38, and the suction The movement of the bow plate 31 is stopped.

Even if the suction plate 31 stops, the auxiliary roller 4 fixed to the rotating shaft
2 is rotating, the photosensitive paper P inserted between the rollers 42 and 46 is pulled out from the suction plate by the auxiliary roller 42 and the roller 46, and then fed to the developing device 28 by the feed roller 30.

After the leading edge of the photosensitive paper P is fed between the rollers 42 and 460, the electromagnetic clutch 40 is deactivated at an appropriate time, and as a result, the suction plate 31 is returned to its original starting position by the bias of the return spring 34.

Note that when the photosensitive paper is loaded vertically, the leading edge of the photosensitive paper is held flat by the suction plate with its tip protruding from the tip of the suction plate, and the photosensitive paper P′ held by the suction plate 31 is held flat by the suction plate 31.
When the leading edge of the photosensitive paper is inserted between the feed rollers 30 by the movement of the photosensitive paper, the photosensitive paper is pulled out from the suction plate by the feed rollers 30 and sent toward the developing device.

The developing device 28 includes a liquid developing roller 280, a developing tray 282 filled with a developer, and a guide 283, and develops an electrostatic image formed on photosensitive paper using an electrophotographic developer to obtain a visible image.

The developed photosensitive paper is transferred to a discharge roller 5 connected to a drive motor.
0 and is discharged out of the main body 1 through the outlet 51.

The operation of each of the above-mentioned devices is controlled by a control unit 52, and this control unit has a drive motor 53, cams 541 to 544 attached to the rotating shaft of the drive motor 53, and microswitches 551 to 554 that engage with each cam. There is.

Next, the operation of the reader printer described above will be explained.

First, when using microfilm F on which image frames are recorded horizontally, a sheet of photosensitive paper is loaded horizontally into the paper feeder 10.

While observing the projected image of the microfilm on the screen 9, the film carrier 6 is moved to position the desired image to be printed at the illumination position.

After selecting a desired frame, when the print button is pressed, the light source 2 is turned off, and the drive motor 53 is driven once, causing each of the cams 54□ to 544 to rotate.

When the cam 541 that controls the drive of the motor rotates, the drive motor 53 maintains its driving state by a self-lock switch 55 that is opened by making one rotation of the cam.

At this time, the charger 26, the developing device 28 and the fan motor 3
Activate 2.

Further, the feed roller 24 is driven by the first drive motor 53.
29, 30 and the discharge roller 50 rotate.

Next, the paper feed switch 5 is operated by the cam 54□ that controls the paper feed.
52 is activated, thereby rotating the rotation shaft 21 of the paper feeder via the clutch mechanism connected to the rotation shaft 21.

Therefore, one sheet of photosensitive paper P is fed upward by the rotation of paper feed roller 20.

The paper feed switch 55□ is set so that the leading edge of the photosensitive paper P reaches the feed roller 24
If it is inserted between the two, it will become inactive.

Subsequently, the photosensitive paper P is transferred to the charger 26 by the feed roller 24.
and is uniformly charged by a charger 26.

The charged photosensitive paper P is sent to an exposure position by a feed roller 29.

The photosensitive paper P sent to the exposure position is attracted to the surface of the suction plate 310 by the appropriate suction force of the fan motor 32 and advances along the surface of the suction plate 310. When the rear end of the photosensitive paper passes the feed roller 29, the photosensitive paper P P is attracted to the surface of the suction plate 31 and automatically stops with the exposed surface held flat.

When the photosensitive paper P stops, the leading edge of the photosensitive paper placed at the predetermined exposure position is approximately 1 crr from the notch 31° of the suction plate 31.
L protrudes (fourth illustrated position).

Next, the exposure switch 553 is activated by the cam 543 that controls the exposure time, thereby lighting the light source 2 for a certain period of time.

Therefore, the image on the microfilm is projected and exposed onto the photosensitive paper P by the light source 2, the projection lens 7, and the nof mirror 8.

When the exposure is completed, the movement switch 554 is actuated by the cam 554 that controls the movement of the paper holder 27, thereby actuating the electromagnetic clutch 40.

Therefore, the suction plate 31 is moved toward the developing device by the rotation of the gear 39, and when the leading edge of the photosensitive paper P is inserted between the auxiliary roller 42 and the roller 46, the photosensitive paper is moved between the rollers 42 and 46.
6 and pulled out from the suction plate and sent toward the developing device.

At this time, the electromagnetic clutch 40 becomes inactive, and the suction plate 31
is returned to the starting position by the bias of the return spring 34.

Subsequently, the photosensitive paper P is transferred to the developing device 2 by the feed roller 30.
The photosensitive paper fed into the photosensitive paper 8 and then developed by the developing device is discharged from the discharge port 51 by the discharge roller 50.

When the photosensitive paper is ejected, one rotation of the cam 541 is completed, and the
The drive motor 53 stops driving.

When the image frames are recorded on the microfilm vertically, if the photosensitive paper is loaded vertically into the paper feeder 10, exposure and development are performed in the same manner as described above, and the image can be correctly copied.

In the above embodiment, photosensitive paper of the same size is loaded in either horizontal or vertical orientation, but photosensitive paper of different sizes can be appropriately selected for copying.

The present invention is applicable not only to reader printers but also to general copying apparatuses that use document originals.

Furthermore, a known feeding mechanism such as a drive roller or a drive belt can be used as a means for feeding the sheet material.

As described above, according to the present invention, the sheet material can be positioned at a predetermined exposure position without providing a special device for detecting the position of the sheet material, and even if the sheet material has a different length or size. Each sheet material can be easily positioned.

Furthermore, sheet materials of different lengths or sizes placed at the exposure position can be easily discharged from the exposure position.

[Brief explanation of the drawing]

Fig. 1 is a sectional view of a reader printer to which the present invention is applied, Fig. 2 is a front view of a paper feeder, Fig. 3 is a sectional view of a paper feeder, and Fig. 4 is a perspective view of a paper holder. be. 5...Lighting device, 6...Film carrier 7...Projection L/nce, 9...Screen, 10...Paper feeding device , 26...
・Charger, 24.29.30...Feed roller,
17...paper holder, 28...developing device.

Claims (1)

[Claims] 1. A first feeding means for feeding the sheet material to the exposure position, a second feeding means for discharging the sheet material from the exposure position, and arranged between the first feeding means and the second feeding means. ,
a holding member that holds the sheet material fed by the first feeding means at an exposure position and is movable in the sheet material feeding direction; , a second feeder having a pair of rollers that holds the exposed surface of the sheet material flat with the leading edge of the sheet material protruding from the leading edge of the holding member or a corner of the holding member, and that holds the sheet material after exposure; A pair of auxiliary rollers that move toward the feeding means, move to a predetermined position, return to the starting position, and feed only the sheet material that protrudes from the corners of the holding member are placed in front of the second feeding means. If the tip of the sheet material is held by the holding member in a state where it protrudes from the tip of the holding member, the tip of the sheet material held by the holding member will be moved by the movement of the holding member after exposure to the l pair of rollers. If the sheet material is inserted between the two and pulled out from the holding member by a pair of rollers, and is held by the holding member with the tip of the sheet material protruding from the corner of the holding member, the movement of the holding member after exposure A copying apparatus characterized in that the leading end of the sheet material held by the holding member is inserted between the pair of auxiliary rollers, and the sheet material is pulled out from the holding member by the pair of auxiliary rollers.