JPH03177831A - Image forming device - Google Patents

Abstract

PURPOSE:To obtain an image in focus even in the case of copying a slide housed in a mount, an image in a frame, etc., by providing at least a piece of glass plate which can selectively be moved into or out of the optical path of light reflected from or transmitted through an object to be exposed. CONSTITUTION:On the top of the original platen glass 2 of a copying machine 40, a slide projector 60 can be mounted when a slide is copied; the image of the slide 62 can be projected on a microcapsule sheet 37. The copying machine is provided with an optical path length adjusting glasses 51a and 51b which can selectively be moved into/out of the optical path of light transmitted through the slide 62 or light reflected from the image in a frame. The optical path length can be made longer by putting each of the glasses 51a and 51b into the optical path. And, the position where the lens is focused is shifted upwards from the position of the original platen glass 2. Thus, the image in focus can be obtained from the slide housed in the mount and also from the image in the frame.

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to an image forming apparatus, and more particularly, to an image forming apparatus that reflects or transmits light from a light source on an exposed object placed on a document table. The present invention relates to an image forming apparatus that forms an image by forming an image on a photosensitive recording medium using reflected light or transmitted light.

[Prior Art] Conventionally, when copying a slide in this type of image forming apparatus, the slide is housed in a mount, placed on a document table, and copied.

[Problems to be Solved by the Invention] However, in the case described above, the slide is located at a position that is lifted from the document table by the thickness of the mount.

Since the image forming apparatus focuses on the position of the document table, there is a problem in that the slide is not in focus and the image becomes blurred.

Furthermore, when the user wants to copy a picture in a frame, for example, the focus is set on the frame, and the picture located off the document table becomes blurred.

The present invention has been made in order to solve the above-mentioned problems, and provides an image forming apparatus that can obtain a well-focused image even when copying a slide housed in a mount or a picture placed in a frame. The purpose is to

[Means for Solving the Problems] In order to achieve this object, the image forming apparatus of the present invention includes at least one glass that can selectively enter and exit the optical path of reflected light or transmitted light from an exposed object. ing.

[Function] In the image forming apparatus of the present invention having the above configuration, by selectively inserting at least one piece of glass into the optical path of the reflected light or transmitted light from the exposed object, the optical path length is increased and the focus is adjusted. The position moves upward from the document glass position.

[Example] Hereinafter, an example embodying the present invention will be described with reference to the drawings.

First, the configuration will be explained using FIGS. 1 and 2.

FIG. 2 is a schematic cross-sectional view of a full-color copying machine 40 (hereinafter simply referred to as a copying machine) that is capable of making full-color copies.

The photosensitive paper (consisting of microcapsule paper and color developing paper) that enables such copying is disclosed in Japanese Patent Application Laid-Open No. 58-8873.
This has been proposed in Publication No. 9, etc., and will not be described in detail here.

As shown in the figure, the copying machine 40 is composed of an original platen glass 2 and an original platen cover 1 (partially shown broken), the top plate of which is movable in the left-right direction. The object 41 to be exposed can be placed face down.

Further, a slide projector 60 can be installed on the top surface of the document table glass 2 of the copying machine 40 as shown in the figure when copying a slide, and the image of the slide 62 can be projected onto the microcapsule paper 37. There is.

The light source 61 of the slide projector 60 is controlled to turn on and off in accordance with the slide copying operation by a control device (not shown).

A light source consisting of a halogen lamp 3 extending in a direction perpendicular to the direction of movement of the document table glass 2 and a semi-cylindrical reflecting mirror 4 arranged to surround it is fixed to the upper right side of the copying machine 40. Line-shaped light is irradiated toward the glass 2.

Therefore, the light emitted from the halogen lamp 3 can sequentially illuminate the entire surface of the document table glass 2 from the left end to the right end by moving the document table glass 2 in the left-right direction.

The light emitted from the light source passes through the transparent document table glass 2 and is reflected by the exposed object 41 placed on it, but this reflected light leaks from places other than the exposed object 41. Document platen cover 1 covers the top surface of document platen glass 2 to prevent
is provided.

In addition, in order to utilize the light emitted from the halogen lamp 3 with high efficiency for document reverse RJ, a beam flap 5 is installed to the left of the light source.
is arranged to reflect light that is not directed directly toward the original and use it again to irradiate the object 41 to be exposed.

A fan 6 and a louver 7 are provided to the right of the halogen lamp 3 to draw air from the outside.

As a result, air can be efficiently applied to the document table glass 2.

Light emitted from the halogen lamp 3 and reflected from the object to be exposed 41 located on the document table glass 2 passes through the filter 8 and enters the lens 9 .

The filter 8 is used to change the light transmission characteristics according to the sensitivity characteristics of the microcapsule paper 37 and adjust the color tone of the copied image.

The lens 9 is attached to a plate 10, and allows minute angle adjustment with respect to the optical path.

An optical path length adjusting device 50, which will be described in detail later, is provided between the filter 8 and the document table glass 2.

The light focused by the lens 9 is turned 180° by two reflecting mirrors 11 and is imaged on a microcapsule paper 37 closely positioned below the exposure table 19. The two reflecting mirrors 1 are fixed to a mirror mounting plate 12, and the optical path length and focus are adjusted by finely adjusting the position of the mirror mounting plate 12.

On the other hand, a long microcapsule paper 37 is wound around a cartridge shaft 14 and housed in a removable cartridge 13 placed below the document table glass 2, and one end of the paper is connected to a large number of rollers. It reaches the winding shaft 25 via the pressure developing device 20.

That is, the microcapsule paper 37 that comes out from the lower part of the cartridge 13 is guided by the feed roller 15 and the rotary roller 17, passes below the exposure table 19, and then passes through the pressure developing device 20.
is supplied to Thereafter, the microcapsule paper 37 that has passed through the pressure developing device 20 is guided to a peeling roller 23 and a meandering adjustment roller 24, and then wound onto a winding shaft 25.

The conveyance speed of the microcapsule paper 37 is controlled to be constant by the capsule paper feed roller 22.
Since the moving speed of the exposure object 41 is made to match the moving speed of the microcapsule paper 37, a latent image of a predetermined line of the exposure object 41 is sequentially formed on the microcapsule paper 37 as it passes through one exposure table.

Further, a developer paper cassette 32 containing cut paper type developer paper 38 is provided below the pressure developing device 20, and the developer paper 38 is taken out one by one by a half-moon roller 33, and then transferred to the developer paper roller 34 and the resist. After the leading end is aligned by the gate 35, the paper is carried into the paper inlet of the pressure developing device 20.

Therefore, the pressure developing device 20 includes the microcapsule paper 3
7 and the color developer paper 38 are supplied in a state where they are in close contact with each other and are integrated. The pressure developing device 20 is composed of a small diameter roller 21 and a backup roller 31.

The microcapsule surface of the microcapsule paper 37 on which the latent image is formed and the developer-coated surface of the color developer paper 38 are in contact with each other on the inside and are held together between the small diameter roller 21 and the backup roller 31, and pressure is applied. It will be done.

The microcapsule paper 37 and color developer paper 38 that have come out of the pressure developing device 20 are conveyed by a capsule paper feed roller 22, and the microcapsule paper 37 is moved upward by a peeling roller 23.
The developer paper 38 is separated in the orthogonal direction.

After color development is promoted by the heat fixing device and an image is formed on the color developer paper 38, the paper is conveyed to the paper discharge tray 27 with the image side facing up. The heat fixing device is composed of a hollow heat roller 29 having a heater 30 inside and a color developing paper feed roller 28.

The separated microcapsule paper 37 is moved to the meandering adjustment roller 2
4 and then wound around the winding shaft 25.

Next, the optical path length adjusting device 50 will be explained in detail using FIG.

The optical path length adjustment device 50 includes two optical path length adjustment glasses 51a,
51b, and each glass 51a.

51b is slidable on the glass rail 52 in the direction of arrow AB. Furthermore, racks 53a and 53b are attached to the front side of the copying machine 40 on each glass 51a and 51b, respectively.

Each rack 53a, 53b is engaged with a pinion 54a, 54b, and each pinion 54a, 54b is connected to a motor 55.
a, 55b.

Further, the optical path length adjusting glass 51b is the optical path length adjusting glass 51a.
A thicker one is used.

In the apparatus configured as described above, the operation when copying a slide will be described below.

First, the document table cover 1 is opened and the slide projector 60 is installed on the document table glass 2, and the copying machine 4 shown in FIG.
A slide mode button 73 on the switch panel 70 provided at a position (not shown) of 0 is pressed to enter the slide copy mode.

Note that in this mode, even if the start button 72 is pressed, the halogen lamp 3 does not light up.

Next, as shown in FIG.
The optical path length correction switch 71 on the switch panel 70 selects the amount of optical path length correction according to the thickness of the mount 63. (In FIG. 3, only the main parts of the slide projector 60 are shown.) The amount of increase Δl in the optical path length is given by the following equation.

Δl-t (1-1/n) (t: total thickness of the optical path length adjustment glass) (n: refractive index of the optical path length adjustment glass) Now, if switch "S" of the optical path length correction switch 71 is selected. do. Then, only the motor 55a rotates, and due to the engagement between the pinion 54a and the rack 53a, only the optical path length adjusting glass 51a moves in the direction of arrow A and is inserted into the optical path.

Therefore, the optical path length increases and the focus position is slide 6.
It will rise to position 2.

When the start button 72 is pressed, the slide projector 60
The light source 61 is turned on, and the image of the slide 62 is formed on the microcapsule paper 37 through the document platen glass 2, the optical path length adjustment glass 51a, the lunches 9, etc., and slit exposure is started, forming a latent image on the microcapsule paper 37. Form.

The microcapsule paper 37 is supplied to the pressure developing device 20 in a superposed state with the developer paper 38 taken out from the developer paper cassette 32 by the half-moon roller 33, and the latent image on the microcapsule paper 37 is developed and developed. The image is transferred onto colored paper 38.

Thereafter, the developing paper 38 is thermally fixed by a thermal fixing device and then discharged from the copying machine 40 . In addition, the pressure developing device 2
The microcapsule paper 37 that has passed through zero is sequentially wound around the winding shaft 25.

To copy a normal original, the slide projector 60 and slide 62 on the document table glass 2 are removed and the slide mode button 73 is pressed again to exit the slide copy mode.

This operation causes the motor 55a to move the optical path length adjusting glass 51a.
is driven out of the optical path.

Next, the case of copying a picture in a frame will be explained.

In this case, for example, the switch of the optical path length correction switch 71 "
Select Lo. In this case, the motors 55g and 55b rotate, and the binions 54a and 54b and the racks 53a and 53b
Due to the engagement relationship, both the optical path length adjusting glass 51a and the optical path length adjusting glass 51b enter the optical path, the optical path length increases, and the image is brought into focus.

Place the frame face down on the document table glass 2 and press the start button 72. In this case, since it is a normal copying mode, the Haloken lamp 3 is lit, and image formation is performed in the same way as when copying a normal original.

Note that when the switch "M" is selected, only the optical path length adjusting glass 51b enters the optical path.

As is clear from the detailed description above, the full-color copying machine 40 of this embodiment has an optical path length adjusting glass 51a that can selectively enter and exit the optical path of transmitted light from the slide 62 and reflected light from a picture in the frame. , 51b, each glass 51
By placing the lenses a and 51b in the optical path, the optical path length becomes longer, and the focused position moves upward from the position of the original platen glass 2.

Therefore, an in-focus image can be obtained even with a slide 62 housed in the mount 63 or a picture placed in a frame.

In this embodiment, a motor is used to drive the optical path length adjusting glass, but it goes without saying that a mechanical component such as a lever may also be used to drive the optical path length adjusting glass.

Other changes can be made without departing from the spirit of the invention.

[Effects of the Invention] As is clear from the above detailed description, the image forming apparatus of the present invention includes at least one glass sheet that can selectively enter and exit the optical path of reflected light or transmitted light from an exposed object. By inserting the glass into the optical path, the optical path length becomes longer and the focus position moves upward from the position of the document table. Therefore, an in-focus image can be obtained even when copying a slide stored in the mount h or a picture placed in a frame.

[Brief explanation of drawings]

1 to 4 show embodiments embodying the present invention. FIG. 1 is a perspective view showing the configuration of an optical path length adjustment device, and FIG. 2 is a perspective view of a full-color copying machine according to this embodiment. A schematic configuration diagram, FIG. 3 is a perspective view showing the area onto which light from the light source of the slide projector is projected, and FIG. 4 is a plan view of the switch panel. In the figure, 2 is a document table glass, 3 is a halogen lamp, 37 is a microcapsule paper, 40 is a full-color copying machine, 41 is an object to be exposed, 51a and 51b are optical path length adjustment glasses, 61 is a light source, and 62 is a slide. .

Claims (1)

[Claims] 1. Image formation in which reflected or transmitted light generated by reflecting or transmitting light from a light source on an exposed object placed on a document table forms an image on a photosensitive recording medium. An image forming apparatus comprising at least one glass that can selectively enter and exit the optical path of the reflected light or the transmitted light.