JPH03229237A - Image forming device - Google Patents

Abstract

PURPOSE:To record an image of a necessary copy surface of an original automatically by pushing up and down an original pressing means while interlocking the start and stop of the driving of the document sending-out operation of a continuous document feeding means. CONSTITUTION:This device is provided with an elevation control means which can push up and down the document pressing means 95 by interlocking the driving start and stop of the document sending-out operation of the continuous document feeding means 4. Then an eccentric cam 320 is driven with the revolution force of the motor 316 of an automatic document feeder 4 to press a lever 322 elastically and a platen cover 70 is elevated every time the cam 320 makes a half turn to lift a platen sheet 95 as well, thereby sending out a continuous document G as shown by an arrow. Consequently, image records at plural positions can be copied automatically and continuously.

Description

[Detailed Description of the Invention] [Object of the Invention] (Industrial Application Field) The present invention relates to the improvement of an image forming apparatus, and more specifically, the present invention relates to the improvement of an image forming apparatus. The present invention relates to an image forming apparatus that conveys a continuous document (.) to a document exposure section, sets the side of the continuous document to be copied on the document exposure section, and records an image.

(Prior Art) An image forming apparatus scans a copy of a document to be copied with light, receives the reflected light on a charged photosensitive image carrier,
After forming an electrostatic latent image corresponding to the optical image to be copied, the electrostatic latent image is visualized using a developer, and its configuration is as shown in FIG. A document exposure section 3 is provided at the upper part of the apparatus, an image forming section 2 is provided approximately at the center of the main body of the apparatus, and a means for optically scanning the copy surface of the document set on the document exposure section 3 is provided at the bottom of the document exposure section 3. 23, and a transfer section 25 and a peeling section 26 are provided at the lower part of the image forming section 2 to transfer the copy surface image of the document sheet formed in the image forming section 2 onto the transfer paper P in the transfer space B, and further, the device On the right side of the main body 1, there is an upper cassette 1 that stores transfer paper P to be sent to the transfer space B of the image forming section 2.
5 and a means cassette 6, and a tray 17 is provided on the left side of the apparatus main body 1 to accommodate a transfer sheet P on which a copy image formed by the image forming section 2 is fixed.

(Problem to be Solved by the Invention) However, in such conventional image forming apparatuses such as copying machines, when copying a required original, the platen cover 70 is opened and the original to be copied is recorded. A page or paper surface is set on a document exposure table 2, and the copy surface is exposed and scanned. Therefore, when copying a document with a long paper surface to be copied or a continuous Z paper document such as a slip sheet, open the platen cover 70 each time you want to copy the corresponding copy surface, and There was the inconvenience of having to set it again.

When copying such continuous originals, the present invention automatically performs the necessary operations without the operator having to manually open the platen cover and resetting the originals on the original exposure table 3 each time a different copying surface is copied. An object of the present invention is to provide an image forming apparatus capable of recording an image on the copy side of a document.

[Structure of the Invention] (Means for Solving the Problems) In order to solve the above problems, in the present invention, in an image forming apparatus that sends a document to be image recorded to a document exposure section and forms an image, a continuous document is provided. a continuous document conveyance means for sending out the document through the document exposure section to the ejected document storage section, a covering means for covering the exposure section, and a document holding means provided to be movable vertically up and down with respect to the covering means; The present invention is characterized in that a lift control means is provided which can raise and lower the document holding means in conjunction with the start and stop of driving the document sending operation of the continuous document conveying means.

(Function) As described above, there is provided a continuous document transporting means for sending continuous documents to the initial document storage means through the document exposure section, a covering section for covering the exposure section, and a vertical direction perpendicular to the covering section. The continuous document holding means is provided with a movable document holding means, and a lifting control means capable of pushing up and down the document holding means in conjunction with the drive start and stop of the document feeding operation of the continuous document conveying means. Even when copying the copying surfaces of a continuous document one after another, the plurality of copying surfaces of the continuous document can be continuously copied without opening the covering means each time.

(Embodiments) Hereinafter, typical embodiments of the image forming apparatus according to the present invention will be described with reference to the drawings.

FIG. 4 is a vertical cross-sectional view showing a schematic configuration of an image forming apparatus for two-color copying according to an embodiment, in which a sensitive and photosensitive image carrier is charged, exposed, developed, transferred, and An image forming section 3 configured with means for cleaning, fixing, etc. is built-in.

Further, at the upper part of the apparatus main body 1, there are a platen glass 3a constituting an original exposure section 3 for exposing the originals G on the original sheet feeding table 71 on which continuous originals G to be image recorded are placed, and An automatic document delivery device (Auto-Do
(abbreviated as “Cument Feeder r A DF”) and single document feeder (Single Document Feeder
mcnt r'eeder (hereinafter referred to as rSDFJ) 4 is provided. (See FIG. 2) Further, on the right side of the apparatus main body 1, there are provided an upper cassette 15 and a means cassette 16 for storing transfer paper P to be sent to the transfer area 3 of the drum-shaped photoreceptor 20 of the image forming section 2. There is. Furthermore, a tray 17 is provided on the left side of the apparatus main body 1 to accommodate the fixed transfer paper P.

In the image forming section 2, a drum-shaped photoreceptor 20 as a photosensitive image carrier is arranged approximately at the center of the apparatus main body 1. Further, around the photoreceptor 20, a charging device 21 that uniformly charges the outer peripheral surface of the drum-shaped photoreceptor 20 along the rotation direction of the photoreceptor 20, and an original exposure unit 3 are placed on the outer peripheral surface of the charged photoreceptor 20. an exposure device 23 that forms an optical image of the copy surface of the original set thereon and eliminates the charge to form an electrostatic latent image;
A developing device 24 that attaches a developer to the electrostatic latent image formed on the outer peripheral surface of the photoreceptor 20 to visualize it into a toner image, and a transfer space B.
a transfer device 2 that transfers the visualized toner image on the photoreceptor 20 onto a transfer paper P that is sent out and comes into contact with the photoreceptor 20;
5. A peeling device 26 that peels off the transfer paper P on which the toner image has been transferred from the surface of the photoreceptor 20; a cleaning device 2 that cleans and collects the developer remaining on the surface of the photoreceptor 20 after the toner image has been transferred;
7. A static eliminator 28 that eliminates the charge on the surface of the photoreceptor 20 after cleaning the residual developer, and a transfer paper transport path 33 (to be described later), which is disposed downstream of the peeling device 26 and the transfer device 25 and is transported. The image forming section 2 includes a fixing device 35 that heats the toner image transfer paper and fixes the unfixed toner image.

Further, inside the apparatus main body 1, transfer paper P automatically fed from the two-stage cassette 15 or the means cassette 16,
Alternatively, the transfer paper P fed from the upper cassette 15 is passed through the transfer space B between the photoreceptor 20 and the transfer device 25, and then transferred to a pair of paper ejection rollers 32 provided on the left side of the apparatus main body 1.
A transfer paper conveyance path 33 is formed that leads to.

An aligning roller pair 34 is arranged on the upstream side of the image transfer area B of the transfer paper transport path 33, and a fixing device 3 is arranged on the downstream side.
5 is provided.

In addition, an arm is swingably attached to the upper cassette 15 in the vicinity of the installed portion, and an arm is attached to a take-out roller 40 that takes out the transfer paper P one sheet at a time, and an arm that receives the transfer paper P taken out via the take-out roller 40. , the transfer paper conveyance path 33
A separation conveyance means 41 consisting of a conveyance roller that conveys the sheet to the upstream side of the transfer sheet conveyance path 33 and a separation roller is provided, and a manual conveyance means [7 A feed reroller 42 is provided.

Further, near the mounting portion of the means cassette 16, there is a take-out roller 43 attached to a swingable arm and takes out the transfer paper P one by one, and a transfer paper P taken out via the take-out paper feed roller 43. Separation and conveyance means 44 consisting of a conveyance roller and a separation roller that receives the transfer paper and sends it to the upstream side of the transfer paper conveyance path 33 is provided.

The exposure device also includes an exposure lamp 51 that irradiates light onto an information writing surface of a document tray set on a platen glass 3O that forms a document exposure section provided in a part of the device main body 1.
, a flaper 50 that surrounds the back of the exposure lamp 51, a first mirror 52, a second mirror 53, and a third mirror 54 that guide reflected light from the original to the outer surface of the photoreceptor 20. , a lens 55, a fourth mirror 56, a fifth mirror 57, and a sixth mirror 58. The light generated from the exposure lamp 51 is irradiated by the reflector 50 so as to be slightly inclined toward the left scale 68 from the direction perpendicular to the platen glass 3.

The exposure lamp 51 and the first mirror 52 surrounded by the reflector 50 are mounted on a first carriage 59 that is movable back and forth along the lower surface of the platen glass 3a.
The second mirror 53 and the third mirror 54
It is mounted on a second carriage 60 that moves in the same direction at half the speed of the five carriages, and these five carriages and 60, in the state shown by the solid line in Fig. 4, move from the left to the right in the figure. , the copy surface of the document G set on the platen glass 3a is exposed and scanned, and the image of the copy surface of the document G is slint-exposed onto the photoreceptor 20.

The developing device 24 includes a two-part developing unit 61 for color development and a lower developing unit 62 for black development, so that development in black or another color, such as red, can be selected.

Further, the first carriage 59 is equipped with a spot light source unit 65 for specifying a certain area of the document G when copying is to be done with the area erased. The spot light source unit 65 is designed to erase charges from a portion corresponding to a designated area from the photoreceptor 20''. Also,
A cooling fan 66 is disposed above the fixing device 35 in the apparatus main body 1 .

Further, the platen glass 3a is formed with a document exposure section 3 for setting a document G having a maximum size of No. 3 in row A of the Japanese Industrial Standards (leisure size for documents intended for overseas use).

Furthermore, on the document feed tray 71 on the platen cover 70,
Place the continuous original G, and as shown in FIG.
The leading end of the platen sheet 95 is passed between the bottom surface of the platen glass 3a and attached to the bin belt of the automatic document feeder 4, which will be described later. It is configured to be stored in a discharge document storage section 72 at the rear of the main body 1.

(See Figure 3) A platen seat l- is provided on the bottom of the platen cover 70.
As shown in FIG. 6, a pair of levers 220-b and 2201a are provided at the left end and right end sides of the platen sheet 95, respectively, with shafts 118a and 118b (not shown) as pivot points; 220-2b, 2
20-2a is provided, and levers 220-1b, 2
Shafts 117a and 117b are horizontally suspended between levers 20-1a and between levers 220-2b and 220-2a as a power transmission mechanism.

The platen sheet 95 described above is formed to have approximately the same size as the platen glass 3a, and is made of an elastic member 95a such as urethane, and a white sheet 95b with a low coefficient of friction attached to the lower surface of the elastic member 95a. ing.

As shown in FIG. 5, the smallest eccentric part of the eccentric cam roller 111 is stopped at the left end of the shaft 117a in contact with the button shear 109, and the slider 115 is disposed at the right end of the apparatus main body 1. ing.

In addition, the left end portions of the shafts 117a and 117b each have
Levers 221 and 222 are provided, and a wire 223 is stretched between the levers 221 and 222.
The structure is such that the swinging of the lever 222 causes the interlocking lever 222 to swing left and right.

Therefore, when the end surface 115a of the slider 115 is not pressed, the entire surface of the platen sheet 95 is in close contact with the platen glass 3a.

Further, in the automatic document feeder 4, belts with bins 309 and 310 are detachably attached to the rear of the apparatus main body 1 shown in FIG. Belts with bins 309 and 310 are installed between disks 305 and 307 and disks 307 and 308, respectively, which are fixed to the shafts 303 and 304 and rotate with the rotation of the shafts 303 and 304.
Document holders 311 and 312 for fixing both ends of the continuous document G are attached to 09 and 310, and are aligned to fix the leading end of the continuous document G to be pulled. Furthermore, inside the tractor unit base 302, as shown in FIG. 7, a one-way clutch 314 is attached to the right end of the shaft 303. , the belts 310 and 309 are rotated. The rotational force of the motor 316 is applied to a pair of worm wheels 317 and 318, which constitutes a one-way clutch.
, the pusher 321 in contact with the eccentric cam 320 is pushed up, the lever 322 is elastically pushed, and the platen cover 70 on the platen glass 3a is moved half a turn of the cam 320 as shown in FIGS. 11 to 13. The platen sheet 95 is also lifted up each time the platen sheet 95 is moved, and the continuous paper original G is sent out in the direction of the arrow (see FIGS. 7 and 8). When the pulse motor 316 rotates in the direction of arrow C, the one-way clutch is "off" and only the belt is driven. Furthermore, when the pulse motor 316 rotates in the opposite direction to C,
The one-way clutch is in the “on” state and shaft 3
No driving force is transmitted to the 03.304 side, and the cam 320 rotates. The motor 316 then rotates until the one revolution switch 324 is in the "on" state.

If the above operation is expressed as a program, it can be shown in a flowchart as shown in FIG. That is, the motor 31
6 is reversely rotated, the one-turn switch 324 turns "on" and stops (the platen sheet 95 is raised as shown in FIG. 19).

) (Step S-1) See FIG. 19) When the motor 316 rotates forward, the belt 3]0 is driven to feed the continuous paper original G as shown in FIG. 20 (Step 5-2).

Further, the motor 316 rotates in the reverse direction by an amount equivalent to the number of pulses m, and then stops. (See Figure 21) (Platen sheet 9
5 is lowered) (Step 5-3) Furthermore, in this state, exposure is performed and a copying operation is performed (Step 5-4).

The rotation of motor 316 is then reversed and switch 324
Rotate +ft until it is in the "on" state (in this state, the platen sheet 95 is lifted upwards).
(See step S-5, FIGS. 10 and 11) After the completion of the step S5, it is checked whether or not the continuous document G has been completely copied (step 5-6).
When all the continuous originals G on 1 have been copied and are stored in the ejected original storage section 72, the platen sheet 95 is lowered, as shown in FIG. 12, and the platen cover 70 is in the normal state.

In this embodiment, the continuous document G is set so that its end on the set position side is placed closer to the right scale 67 of the platen glass 3a.

Therefore, when the exposure lamp 51 moves to the right scale 67 and scans the document at an angle where the light irradiation direction is slightly inclined toward the left scale 68 from the direction perpendicular to the platen glass 3a, the document is exposed to the platen glass 3a. Since shadows on the edges of the document can be prevented, the entire image of the document can be copied.

Next, a second embodiment of the invention will be described.

FIG. 14 shows a sloped portion 3D at the right end of the platen glass 3a.
It has been established. This inclined portion 3D is formed by the exposure lamp 5.
] is moved to the right end of the platen glass 3a, and the angle is along the inclination of the light irradiated from the exposure lamp 51 onto the platen glass 3a.

In this way, at the right end of the platen glass 3a, the inclined part 3D
By providing this, it is possible to prevent the formation of a shadow on the document due to the edge of the platen glass 3a, and it is possible to increase the amount of light from the exposure lamp 51 for the negative layer document.

Further, other embodiments of the image forming apparatus of the present invention will be described.

In the above-described embodiment, an automatic document transport device using a belt as the document transport means 4 for transporting the continuous paper document G to the document exposure table 3 has been described. As shown in the figure, a continuous paper original feed tray 71 and an ejected original storage tray 72 are arranged at the left and right edges of the upper part of the apparatus main body 1 so as to face each other, and by switching the lever on the upper part of the platen cover 70, The platen sheet 95 is moved up and down, and when the sheet 95uT) is used, the continuous paper document G placed on the continuous paper feed table 71 is manually passed between the platen sheet 95 and the platen glass 3a.
After pulling the continuous paper original G toward the ejected original storage table 72 and setting the copy side of the continuous paper original G on the platen glass 3a, the platen sheet 95 is moved to d by switching the switching lever 315 as shown in FIG.

wn, and the copy surface of the original G is brought into close contact with the platen glass 3a (FIG. 17(b)), and the copy surface of the continuous paper original G is exposed and scanned.After the exposure is completed, Switch the lever 315 to the opposite side, pull the leading edge of the continuous paper document G, and pull out the required amount.FIG. 18(a),
As shown in (b), the continuous paper original G may be manually conveyed to the original exposure surface 3 and set.

The above-mentioned switching lever 315 allows the platen cover 70 to
To raise and lower the lower platen sheet 95. The conveyor roll 81 attachment notch of the platen sheet 95 has a shaft 118a at the end on the side of the opening 96, respectively.

A pair of levers 2 with ...118b, ... as a pivot point
20-1b, 220-1a, 220-2b, 220-2
a is provided, and shafts 117a and 117b are horizontally suspended between the levers 220-1b and 220-1a and between 220-2b and 220-2a as a power transmission device.

The left end of the shafts 117a and 117b is shown in FIG. 18(a).
As shown in the figure, levers 221 and 222 are provided, a wire 223 is stretched between the levers 221 and 222, and the left side of the lever 315 is linked to the rightward switching, and the lever 31
6 swings the shaft 117a to the left or right to raise or lower the platen sheet 95.

As shown in FIG. 18(b), this lever 315 consists of a lever 315 and a lever 316. When the lever 315 is switched to the right side, the lever 117a is moved down about the pivot point 218a that presses the tip of the lever 316. If the platen sheet 95 is tilted to the opposite side (to the left), it will work to raise the shaft 117a, so the platen sheet 95 can be moved up or down.
L, close the gap between the platen glass 3a or open it.

In addition, as shown in FIG.
If a document guide plate is provided in which the distance between the guide plates 318 on both sides can be adjusted using a pinion rack structure, it can also be adjusted to match the width dimension of the continuous paper document feed table.

Furthermore, the above-mentioned ejected document storage table 72 may be arranged above the platen cover 70, as shown in FIG. 20, for example.

It goes without saying that the present invention is not limited to the embodiments described above, and can be implemented in various modifications without departing from the gist of the invention.

[Effects of the Invention] As is clear from the above description, the image forming apparatus according to the present invention provides an electrostatic latent image formed on an image carrier by scanning the copy surface of a document on which an image is to be recorded. An image forming apparatus that visualizes images by adhering a developer, comprising: a continuous document conveying means for sending continuous documents to a discharged document storage side via the document exposure section; a covering section for covering the exposure section; a document holding device movable vertically up and down with respect to the covering device; and an elevation control device that moves up and down the document holding device, respectively, in conjunction with the start and stop of the document feeding operation of the continuous document conveying device. Because of this feature, when copying information recorded on multiple parts of a continuous document one after another, there is no need to open and reset the platen cover each time you copy image records on different copy sides. It is possible to continuously copy image recordings recorded in multiple parts.

[Brief explanation of drawings]

FIG. 1 is a schematic vertical sectional view of main parts showing the basic configuration of an image forming apparatus of the present invention, FIG. 2 is a perspective view of the image forming apparatus of FIG. 1, and FIG. 3 is a copy of the image forming apparatus of FIG. 1. FIG. 4 is a longitudinal cross-sectional view of the main part showing the configuration of an image forming apparatus for color copying according to an embodiment of the present invention, and FIG. 5 shows an image of the embodiment. FIG. 6 is a perspective view showing the structure of the platen sheet of the image forming apparatus; FIG.
The figure is a perspective view showing the combined state of the drive mechanism of the continuous document feeder shown in FIG. 6, FIG. 8 is a side view showing the principle configuration of the image forming apparatus according to the embodiment, and FIG. 9 is an image forming apparatus according to the embodiment. FIGS. 10 to 13 are side views showing the state of continuous document conveyance by the image forming apparatus according to the embodiment and the progress of the elevation and descent of the platen cover. FIG. FIG. 15 is a cross-sectional view of a main part showing the configuration of another embodiment of the document exposure section of the forming apparatus, FIG. ) is a perspective view showing a state of manual conveyance of continuous documents by the document transfer device of another embodiment, No. 18
Figures (a) and (b) are perspective views of main parts showing the elevating mechanism of the platen sheet in other embodiments, and a principle explanatory diagram showing the configuration of the switching lever, respectively, and Fig. 19 is an illustration of the image forming apparatus according to another embodiment. FIG. 20 is a perspective view of a main part showing the structure of the guide plate of the ejected document accommodating section, FIG. 20 is a perspective view showing an embodiment of the ejected document accommodating section using the guide plate of FIG. 19, and FIG. FIG. 3 is a vertical cross-sectional view of main parts showing the configuration. DESCRIPTION OF SYMBOLS 1...Apparatus body 2...Image forming section 3...Document exposure section 3a...Platen glass 4...Document transport means 20...Photosensitive image carrier 70...Platen cover (covering) Means) 71...Document feed table 2...Discharge document storage table

Claims (1)

[Scope of Claims] In an image forming apparatus that sends a document to be recorded as an image to a document exposure section and forms an image by exposing and scanning the copy surface of the document, continuous documents are ejected through the document exposure section and stored. a continuous document conveying means for sending out the document to the printing section side; a covering means for covering the exposure section; a document holding means provided movably vertically up and down with respect to the covering means; and a document feeding operation of the continuous document conveying means. An image forming apparatus characterized in that an elevating and lowering control means is provided which can raise and lower the document holding means in conjunction with the start and stop of driving.