JPH0545692U - Exposure equipment for copy cameras - Google Patents

Abstract

(57) [Summary] (Correction) [Purpose] To provide a diffusion transfer type copying camera which has a simple structure and can prevent the operation of the apparatus when a new magazine is forgotten to be mounted. A copy in which an exposure unit scans a document in a slit shape to expose it and exposes the reflected light to a photosensitive material that is wound into a roll, housed in a magazine, and pulled out from the magazine to form an image. In the exposure device of the camera, the magazine
The 61 is detachably attached to the main body of the device, and the optical sensor 90 that detects the presence or absence of this magazine 61 is arranged.
Only activate when this light sensor 90 detects that the magazine 61 has been installed.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to an exposure device of a diffusion transfer type copying camera used for producing a master copy.

[0002]

[Prior Art]

Diffusion transfer type copying cameras form a latent image by exposing a flat image of an original on a photosensitive material called negative paper, and superimposing an image receiving material called positive paper on the exposed photosensitive material. Is placed in a developing solution and the image recorded on the photosensitive material is diffused and transferred to the image receiving material. In order to form a latent image on the photosensitive material, the type of imaging a document by copying camera, must be without distortion can accurately record up large document about A ₃ size, and have a scaling function Therefore, the copying camera becomes very large and heavy.

Therefore, a diffusion transfer type copying camera, which is schematically shown in FIG. 2, has come to be used. To explain this, the upper surface of the casing 10, for example up to A ₃ platen 11 clear glass of the document 50 can be mounted in size and is located, has become tabletop. An exposure unit 20 having a built-in light source lamp 21 is arranged immediately below the platen 11 so as to be movable at a variable speed V from the standby position. The exposure unit 20 moves from the standby position, scans and exposes the entire surface of the original 50, and the reflected light of the original 50 is horizontally emitted by the mirror M ₁ in the exposure unit 20. The reflected light of the original 50 reflected by the mirror M ₁ is reflected by the mirrors M ₂ and M ₃ that move in the same direction as the exposure unit 20 at a speed half that of the exposure unit 20, enters the lens 40, and enters the lens 40. The emitted light is reflected by the mirrors M ₄ and M ₅ , and further reflected by the plane mirror M ₆ to form an image on the photosensitive material 60 that moves in the horizontal direction at the speed V ₀ .

The photosensitive material 60 is formed by adhering a photosensitive layer on the surface of a support made of paper or film, and when exposed as described above, a latent image of the original 50 is formed on the photosensitive layer. The photosensitive material 60 is stored in a magazine 61 in a roll shape, but it is sent out horizontally by the conveyance roller group 63 and cut into a predetermined length by a cutter 62 into a sheet shape. Next, the image receiving material 70 is an image receiving layer adhered to the surface of a support made of paper or film, and the image receiving material 70 is superposed on the exposed photosensitive material 60 and placed in the developing solution in the tray 80. After entering, it is pressed by the squeezing roller 81. In this developer, the latent image on the photosensitive layer is developed into blackened silver, while the silver halide in the unexposed area is converted into a water-soluble silver salt and diffuses into the image receiving layer of the image receiving material 70. Then, the silver salt in the image receiving layer is reduced by the developing solution to form a black silver image. That is, the image of the original 50 is copied onto the image receiving material 70, and the image receiving material 70 and the photosensitive material 60 are taken out from the discharge port 12.

As described above, the surface of the original placed on the transparent glass original table is scanned from below while exposing in slit form by the exposure unit, and the light reflected from the original is exposed to the light-sensitive material through the lens. By doing so, the device is simple and can be downsized, and can be duplicated as if it were a copy. In addition, in order to provide the reduction / enlargement function, the ratio of the optical path length from the original to the lens and the lens to the photosensitive material can be changed, and the ratio of the scanning speed of the exposure unit and the feeding speed of the photosensitive material can be adjusted. I am doing it.

[0006]

[Problems to be solved by the device]

 In such a copying camera, the magazine in which the photosensitive material is stored in a roll is detachably arranged in the apparatus main body. When the photosensitive material is used up, the magazine is taken out and a new magazine is mounted in the apparatus main body. In other words, the magazine is replaced, but you may forget to install a new magazine only by taking out the magazine that has run out of photosensitive material. When the copy switch is turned on in this state, the apparatus operates as described above, but the image receiving material is wasted and copying cannot be performed.

In view of these circumstances, the present invention provides a diffusion transfer type copying camera which has a simple structure and can prevent the operation of the apparatus when a new magazine is forgotten to be mounted. The purpose is to

[0008]

[Means for Solving the Problems]

 In order to achieve such an object, the present invention proposes that an exposure unit scans and exposes a document in a slit shape, exposes the reflected light in a roll shape, stores the reflected light in a magazine, and stores the reflected light in the magazine. In the exposure device of a copying camera that exposes material to form an image, a magazine is detachably attached to the main body of the device, and an optical sensor is installed to detect the presence or absence of this magazine. This optical sensor is attached to the magazine. Only when it is detected that it is activated.

[0009]

[Action]

 In other words, if the user forgets to install a new magazine in which the photosensitive material is stored in a roll, it becomes inoperable due to the signal from the optical sensor, so the device will not operate even if the copy switch is pressed.

[0010]

【Example】

 FIG. 1 shows an essential part of the embodiment of the present invention. The magazine 61 is set at a predetermined position of the tray 15, and the photosensitive material stored in the magazine 61 after being wound into a roll is pulled out by the transport roller 63. Rollers 16 are attached to both sides of the tray 15 and move along a pair of guide rails 14 arranged perpendicular to the paper surface. Then, when the photosensitive material is used up, the tray 15 can be moved and pulled out from the apparatus, and the magazine 16 can be replaced. A light sensor 90, which is a reflective photointerrupter, is attached to the chassis 13.When the magazine 61 is mounted in place, the light emitted from the light sensor 90 is reflected by the magazine 61. When the copy switch (not shown) is turned on by detecting that the is installed, the device is activated. On the other hand, if you forget to install the magazine 61, the light emitted from the optical sensor 90 will not be reflected, so it will be detected that the magazine 61 is not installed, and the device will not operate even if you turn on the copy switch. There is.

However, when a new magazine 61 is mounted, a document is placed on the document table 11 and the copy switch is turned on, the optical sensor 90 detects that the magazine 61 is mounted. The device is activated and can make copies. However, if the user forgets to install the magazine 61, the device will not operate even if the copy switch is turned on, so it is possible to prevent unnecessary operation in which copying is not possible.

[0012]

[Effect of the device]

 As described above, the exposure device of the diffusion transfer type copying camera of the present invention has an optical sensor for detecting the presence of a magazine, and can operate only when the optical sensor detects that the magazine is mounted. As a result, it is possible to prevent useless operations in which copying cannot be performed if the magazine is forgotten to be installed.

[Brief description of drawings]

FIG. 1 is an explanatory diagram of a main part of an embodiment of the present invention.

FIG. 2 is a conceptual diagram of a diffusion transfer type copying camera.

[Explanation of Codes] 10 Casing 11 Document Plate 13 Chassis 15 Tray 20 Exposure Unit 21 Light Source Lamp 40 Lens 50 Document 60 Photosensitive Material 61 Magazine 63 Conveying Roller 70 Image Receiving Material 90 Sensor

Claims (1)

[Scope of utility model registration request] 1. An exposure unit scans and exposes a document in a slit shape, and exposes this reflected light to a photosensitive material that is wound into a roll, housed in a magazine, and pulled out from this magazine to form an image. In the exposure apparatus of a copying camera, the magazine is detachably attached to the main body of the apparatus, and an optical sensor for detecting the presence or absence of the magazine is arranged. Only when the optical sensor detects that the magazine is attached, it is activated. An exposure device for a copying camera, which is characterized by making it possible.