JPH04303862A - Image forming device - Google Patents

Abstract

PURPOSE:To easily execute the attaching and detaching work and the exchanging work of an image projection device in an image forming device which can copy a projected image through the image projection device. CONSTITUTION:The image projection device main body 50 is constituted so as to be attachably and detachably positioned and fixed to the image forming device main body 1 through one operation by a positioning and fixing means 80 constituted of a stay 60, a locking pawl 61, a stopper pin 62, a locking hole 71 and a stopper hole 72.

Description

[Detailed description of the invention]

0001

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an image forming apparatus capable of copying images directly from, for example, film.

0002

2. Description of the Related Art In recent years, copying machines have been equipped with image projection devices, which project an image of the film onto a screen by irradiating the film with light from a light source. A device on which an image can be formed and copied onto copy paper as a recording medium has been developed and put into practical use.

[0003] In such a copying machine, a mirror as an imaging device, a Fresnel lens for correcting uneven light distribution, and a screen are placed as a unit on the document table of the copying machine main body. The projected image projected from the projector is reflected by a mirror, and the reflected image is guided onto a screen via a Fresnel lens to form an image, and is scanned by a scanning section that constitutes the image forming means of the main body of the copying machine. By this,
It is designed to copy onto copy paper.

0004

[Problem to be Solved by the Invention] However, in the conventional structure described above, when the image projection device main body is installed on the copying machine main body, the signal line is connected using several harness relay connectors. Moreover, the installation time is time-consuming.

[0005] Moreover, since the positioning and fixing of both is done by screwing, there are problems such as troublesome attachment/detachment work during installation and removal, and replacement in the event of a failure of the image projection device. .

The present invention has been made under the above circumstances, and its object is to provide an image forming apparatus in which the image projection apparatus can be easily attached/detached and replaced. There is a particular thing.

[0007]

[Means for Solving the Problems] In order to solve the above-mentioned problems, the present invention scans an image of an original placed on an original placing table, and uses a transfer means to record a document supplied from a paper feeding means. An image forming apparatus main body equipped with an image forming means for transferring to a medium, and an image forming apparatus installed on the image forming apparatus main body, and an image on the projection film is projected by irradiating the projection film with light from a light source. and an image forming means for forming a projected image from the image projecting means on a document table of the image forming apparatus main body, and the image projecting means sends a signal to the image forming apparatus main body. an image projection device main body whose lines are connected to each other via a connector; and the image projection device main body is placed in a predetermined position of the image forming device main body;
The image projection apparatus is characterized by comprising positioning and fixing means for removably positioning and fixing the image projecting apparatus by simply moving the image projecting apparatus main body.

[0008]

[Operation] That is, the present invention is designed to removably position and fix the image projecting device main body with a one-touch operation of simply moving the image projecting device main body to a predetermined position on the image forming device main body. Connection of the signal line by the connector and attachment and detachment of the image projection apparatus main body to the image projection apparatus main body can be easily performed.

[0009]

DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below in detail with reference to the drawings.

FIG. 1 schematically shows the overall configuration of a thermal transfer type color copying machine as an image forming apparatus according to the present invention.
In the figure, 1 is the main body of the copying machine.

[0011] On the upper surface of the copying machine main body 1, there is a document mounting table 2 made of transparent glass on which a document (not shown) is set.
A platen cover 3 for holding the original is provided on the original placing table 2 so as to be rotatable upward. In addition, numeral 4 in the figure is an operation panel provided at the front part of the original document mounting table 2. As shown in FIG.

As shown in FIG. 2, an image forming means 5 is disposed below the original placing table 2 in the copying machine main body 1. It has a scanning section 6 that scans the set original and reads the image.

The scanning unit 6 collects light from an illumination lamp 7 as a light source onto the document surface using a reflector 8, and directs the reflected light from the document surface to first, second, and third mirrors 9, The light is guided to a lens 12 via lenses 10 and 11, and the light from this lens 12 is guided to a photoelectric converter 15 via fourth and fifth mirrors 13 and 14.

The lens 12 has a fixed focal length, and is controlled so that it can be moved in the optical axis direction when changing the magnification. Note that the lens 12 in this case may be a variable focal length lens such as a zoom lens.

[0015] Also, the fourth and fifth mirrors 13 and 14
The position is adjusted in accordance with the change in optical path length corresponding to the selected magnification ratio.

That is, the illumination lamp 7, the reflector 8, the first mirror 9, the second and third mirrors 10,
11 are respectively mounted on carriages mutually connected to timing belts driven by stepping motors of a drive system (not shown), and the second and third mirrors 10 and 11 are connected to an illumination lamp 7, a reflector 8 and a third mirror. The mirrors 1 and 1 move in the same direction at 1/2 the speed of the mirror 9, so that scanning is performed so that the optical path length up to the lens 12 is constant.

On the other hand, the photoelectric converter 15 photoelectrically converts the light reflected from the surface of the document to separate and output the image of the document as cyan, green, and yellow (or red, green, and blue) light signals. It is mainly composed of, for example, a CCD type line image sensor.

Further, reference numeral 16 in the figure denotes an image forming section disposed below the scanning section 6, which together with the scanning section 6 constitutes the image forming means 5.

The image forming section 16 has a platen drum 17 whose outer circumferential surface is made of an elastic material such as rubber, and which is rotatably supported approximately at the center of the copying machine main body 1 .

Around this platen drum 17, pressing rollers 18..., a clipper 19, and a thermal head 20 which can be moved in and out of contact as a thermal transfer means are arranged, and between this thermal head 20 and the platen drum 17, An ink ribbon 23 serving as an image forming medium is interposed between cores 21 and 22 which are rotated as required via a driving force transmission mechanism (not shown).

Reference numeral 24 in the figure denotes a paper feed cassette as a paper feed means in which copy paper P, which is a recording medium, is accommodated.

The copy sheets P in the paper feed cassette 24 are taken out one by one via the paper feed roller 25, sent to the registration rollers 27 by the conveyance roller 26, and after their leading edges are aligned, they are taken out via the guide 28. The platen drum 1
It is scheduled to be transferred to the 7th.

The leading edge of the copy paper P transferred toward the platen drum 17 is clipped by a clipper 19 and is wound around the platen drum 17 while being prevented from lifting by pressing rollers 18. There is.

That is, the copy paper P clipped by the clipper 19 is wound around the platen drum 17 by the clockwise rotation of the platen drum 17, and after its leading edge passes through the printing area, the copy paper P is attached to the thermal head 20.
contacts and presses the platen drum 17 from the separated state, thereby printing an original image on the copy paper P.

[0025] When the printing of the original image on the copy paper P is completed in this way, the platen drum 17 rotates clockwise until the rear end of the copy paper P reaches the paper ejection guide 29. Continuing on, when it reaches the point, it rotates counterclockwise and the rear end of the copy paper P is peeled off from the platen drum 17 by a peeling claw (not shown) and guided to the guide 29 side.

The copy paper P guided to the guide 29 side is
It is released from the clipper 19, and the conveyance roller 30 and guide 3
1 and a paper discharge roller 32, the paper is discharged onto a paper discharge tray 33.

Next, when copying a projected image using the copying machine main body 1, as shown in FIGS. 1 and 3, a mirror 41, a Fresnel An imaging device main body 40 as an imaging means in which a lens 42 and a screen 43 are unitized is mounted.

On the other hand, an image projecting device main body 50 as an image projecting means is installed on one side upper part of the copying machine main body 1 at a position corresponding to the image forming device main body 40.

The image projecting device main body 50 includes a light source 51, a pair of condenser lenses 52, 52 for condensing light from the light source 51, and a focusing mechanism (not shown) that faces the condenser lenses 52, 52 to adjust the focal length. and a movably adjustable lens 53.

[0030]Then, the condenser lenses 52, 52
A film carrier 55 is set between the holder 54 and the lens 53, and the light from the light source 51 is directed onto a film to be projected (not shown) in the film carrier 55. By irradiating it, the image of the film is projected onto the mirror 41 of the imaging device main body 40.

That is, the image of the film projected from the image projection device main body 50 is reflected by the mirror 41 of the image forming device main body 40.
reflected onto the screen 4 via the Fresnel lens 42.
The image is formed on 3.

The film image formed on the screen 43 is transferred to the image forming means 5 in the same way as in a normal copying operation.
The image is scanned by a scanning unit 6, and is transferred by an image forming unit 16 onto copy paper P fed from a paper feed cassette 24, thereby making a copy.

By the way, the connection of the signal lines between the copying machine main body 1 and the image projection apparatus main body 50 is as shown in FIG. This is done via provided connectors 100, 500.

Therefore, in the present invention, when installing the image projection device main body 50 on the upper part of the copying machine main body 1, a guide hole 10 is provided near the connector 100 provided on the upper part of the copying machine main body 1.
1 and 102, and these guide holes 101 and 102.
In order to correspond to
02 is made to protrude.

[0035] Then, when installing, the guide hole 101
, 102 by inserting guide pins 501, 502 into the connectors 100, 50.
0 can be easily connected to each other.

On the other hand, in order to install the image projection device main body 50 on the copying machine main body 1, as shown in FIG. There are four hook-shaped locking claws 6 on the top, bottom, left and right of the surface corresponding to the side surface of the copying machine main body 1.
1... is formed.

Further, the stay 6 is attached to the side surface of the copying machine body 1 corresponding to the mounting position of the image projection device body 50.
Four locking holes 71 are formed so as to correspond to the respective locking claws 61 provided in the 0, and each locking claw 61 is locked as shown in FIGS. 6 and 7 at the time of installation. By inserting each into the stop holes 71 and locking them in the hooked state,
The stay 60 can be detachably attached to the copying machine main body 1 with a one-touch operation, thereby making it easy to install the image projection device main body 50 in the copying machine main body 1.

Furthermore, 62 in the figure is a stopper pin provided on the corresponding surface of the side surface of the copying machine main body 1 of the stay 60;
Reference numeral 2 denotes a stopper hole provided in the side surface of the copying machine main body 1 to which the stopper pin 62 corresponds.

That is, as shown in FIGS. 8 and 9, the stopper pin 62 is biased in a protruding state by a spring 63, and is engaged with the stopper hole 72 when the stay 60 is attached to the copying machine main body 1. By doing so, the positioning of the stay 60 with respect to the copying machine main body 1, that is, the positioning of the image projection apparatus main body 50, is ensured.

As described above, according to the present invention, the stay 6
0, the positioning and fixing means 80 composed of the locking claws 61 . Connector 100,500
This makes it easy to connect signal lines.

[0041]

Effects of the Invention As is clear from the above description, the present invention enables the image projection device to be removably positioned and fixed with a one-touch operation by simply moving the image projection device to a predetermined position on the image forming device. Therefore, connection of the signal line by the connector and attachment and detachment of the image projection apparatus main body to the image projection apparatus main body can be easily performed.

[Brief explanation of the drawing]

FIG. 1 is an external view showing an embodiment of an image forming apparatus according to the present invention.

FIG. 2 is a schematic cross-sectional view of the overall internal structure.

FIG. 3 is an explanatory diagram schematically showing an image forming state by the image projection device.

FIG. 4 is a schematic explanatory diagram showing a connection state of a signal line by a connector of an image projection device to an image forming device.

FIG. 5 is a schematic explanatory diagram showing how the image projection device is attached to the image forming device.

FIG. 6 is a schematic explanatory diagram showing how the image projection device is attached to the image forming device.

FIG. 7 is a schematic explanatory diagram showing how the image projection device is attached to the image forming device.

FIG. 8 is a schematic explanatory diagram showing how the image projection device is attached to the image forming device.

FIG. 9 is a schematic explanatory diagram showing how the image projection device is attached to the image forming device.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1...Device main body, 2...Document mounting table, 5...Image forming means, 6
...Scanning section, 16... Image forming section, 20... Transfer means, 24...
Paper feeding means, 40... Imaging means, 50... Image projection means (image projection device main body), 60... Fixing means (stay), 61
...Latching claw, 62...Stopper pin, 71...Latching hole, 72
... stopper hole, 80 ... positioning fixing means, 100 ... connector, 101, 102 ... guide hole, 500 ... connector,
501, 502... Guide pin, P... Recording medium.

Claims (1)

[Claims] 1. An image forming apparatus main body comprising an image forming means for scanning an image of a document placed on a document placing table and transferring it to a recording medium supplied from a paper feeding means by a transfer means; An image projection means is installed on the main body of the image forming apparatus, and projects an image on the projection film by irradiating the projection film with light from a light source; an image forming means for forming an image on a document mounting table of a main body of the image forming apparatus; An image forming apparatus comprising: positioning and fixing means for removably positioning and fixing an image projecting apparatus main body to a predetermined position of the image forming apparatus main body simply by moving the image projecting apparatus main body.