JPS60258532A - Visual recognizing device of original image position in picture recorder - Google Patents

Abstract

PURPOSE:To see the position of an original image from the rear face of an original to recognize easily this position visually without making a device large-sized neither complicating the structure, by lighting a bar-shaped exposure light source to irradiate the original from the lower face of an original supporting plate before slit exposure scanning is started. CONSTITUTION:An exposure lamp 11 is lit not only in the normal exposure operation but also by operation of an original visual recognizing push-button switch 19. When this switch 19 is depressed after a platen cover 4 is opened to place an original 5 on a platen glass 3 with the picture face turned down, the exposure lamp 11 is lit to irradiate an original part 5b indicated by oblique lines, and parts 5a to be copied of the original 5 are seen through. Consequently, an operator shifts the original 5 on the platen glass 3 vertically and horizontally to position it while seeing the picture of characters, patterns, etc. of the original 5, and the picture of the original 5 is copied in a required position of a form.

Description

[Detailed description of the invention]

INDUSTRIAL APPLICATION FIELD The present invention relates to a copying machine that uses a rod-shaped exposure light source to irradiate an opaque document in the form of a strip, and scans the same in a direction intersecting the opaque document strip to record an image of the document. The present invention relates to a slit exposure type image recording device such as an input scanning device or a facsimile, and particularly to a device that can visually confirm the position of the document image. 1.11 In a conventional slit exposure type image recording device, the rod-shaped exposure light source is used to control the electric lamp that is to be turned on, until the image recording operation begins.
When trying to enlarge and record an original that is wider than the original support plate (known as a platen glass) or a specific range of the original image on the original support plate, it is necessary to visually check the image of the original from the back side. Therefore, it is difficult to place the part of the document image to be recorded within the required scanning range. In some cases, an optical system such as a mirror was installed below the document support plate separately from the exposure system, and the image of the document was projected onto the document support plate and another document viewing window. It was inevitable that the interior space would become wider and the size larger. Problems to be Solved by the Invention The present invention overcomes these difficulties and improves the T-image recording device.The problems to be solved are as follows: The position of the original image can be easily recognized visually. In the present invention, in a slit exposure type image recording apparatus, a bar-shaped exposure source is turned on to illuminate the original from the lower surface of the original supporting plate in a slit exposure type image recording apparatus. The position of the image can be visually checked from the back side of the original. EXAMPLE An example of the present invention illustrated in FIGS. 1 to 3 will be described below. ■ is a slit exposure mirror moving type dry electrophotographic copying machine.
A platen glass 3 serving as a transparent document support plate is attached to the top of the casing 2 of the copying machine L, and a platen cover 4 is attached to the top surface of the platen glass 3 so as to be able to be opened and closed centering on the back side. The original 5 placed on the glass 3 is tightly pressed against the glass 3 by the platen cover 4. 4 In the casing 2, a first carriage 6 and a second carriage 7 are supported below and adjacent to the platen glass 3 so as to be movable left and right, and the gt gear 6
When the second carriage 7 is reciprocated over the entire length of the platen glass 3 in the left and right directions, the second carriage 7 is reciprocated from approximately the center of the platen glass 3 to its right end at half the speed of the second carriage 7. Furthermore, a parabolic main reflecting mirror 8 is provided on the first carriage 6, and a sub-reflecting member 9 is integrally attached to the upper end of the main reflecting mirror 8, and is located at the focal point of the main reflecting mirror 8. An exposure lamp 11 directed toward the center is installed, and a first mirror 12 is integrally attached below the opening 10 of the sub-reflection member 9. In response to this operation, the exposure lamp 11 is turned on. Furthermore, the second carriage 7 has second and third mirrors 13.
, 14 are provided, and the light irradiated by the exposure lamp 11 and diffusely reflected by the original 5 is transmitted to the first . 2nd゜3rd mirror 1
2.13. [After being reflected by 4, Vs (not shown)
The light passes through the mirror, is further reflected by the fourth mirror 15, and is formed into an image on the drum-shaped photoreceptor 17. The latent image formed on the drum-shaped photoreceptor 17 is developed to form a toner image in the same manner as in a normal dry type electrophotographic copying machine, and the toner image is transferred to paper and then fixed. It has become. In the copying machine 1, the first carriage 6 after copying is stopped at position A shown by the solid line in FIG. 2, and the copying start push button is pressed.

[When copying is started by the operation in step 8, it is first moved to the left from position A shown by the solid line, and then moved to the right after reaching the start position B shown by the two-dot chain line. It has become. Since the embodiment shown in FIGS. 1 to 3 is constructed as described above, when the platen cover 47 is opened, the image surface of the original 5 that is wider than the platen glass 3 is removed. After placing the document face down on the platen glass 3, press the document viewing push button 9 to turn on the exposure lamp 11, and as shown in FIG. The portion 5a of the original 5 to be copied can be seen through the irradiation. Therefore, during the operation, while looking at the image l of characters, figures, etc. in the portion 5α to be copied,
The edge of the image to be copied can be properly aligned with the V-distortion guide 16 on the edge of the platen glass 3 at the required location by shifting the image to the desired location on the paper. The image of the original document 5 can be properly copied. Even when a part of the original 5 is to be enlarged and copied, the image of the original 5 can be appropriately copied to the required location on the paper, as in the case of the above-mentioned shingle. In the embodiment described above, the home position of the first gear 6 was A, but as shown in FIG. You may also do so. Also, the home position of the first carriage 6. It may be set to 5 so that it can be set at a desired position depending on conditions such as copying magnification and paper size. Further, the present invention can be applied not only to copying machines but also to raster input scanning devices that record an image of a document by forming it on an image sensor arranged in the width direction. Effects of the Invention In the present invention, before the start of slit exposure scanning, it is possible to irradiate the original 2 from below, see through the image from the back side of the original, and accurately align the image at an appropriate position with respect to the original support plate. It would be possible to make proper copies easily and without errors.

[Brief explanation of drawings]

FIG. 1 is a schematic side view showing a second embodiment of the document image position viewing device of an image recording apparatus according to the present invention, FIG. 2 is an enlarged vertical sectional side view of the main part thereof, and FIG. FIG. 4 is an enlarged side view of main parts of another embodiment. ■... Slit exposure mirror moving type dry type electrophotographic copying machine, 2... Casing, 3... Platen glass, 4...
...Graten cover, 5... Original, 6... First carriage, 7... Second carriage, 8... Main reflecting mirror, 9... Sub-reflecting member, 10... Opening Part, 11
...exposure lamp, 12...first mirror,
13... 2nd mirror, 14...
3rd mirror, 15... 4th mirror, 16...
... Registration guide, 17... Drum-shaped photoreceptor, [8... Copy start push button switch. L9... Document visibility push button switch, Add... Registration guide. Agent: Patent attorney Nozomi Ehara, 2 people

Claims (1)

[Claims] The document on the transparent document support plate is oriented in the width direction.
slit exposure to record an image of the original by moving the exposure lamp in the longitudinal direction while irradiating with a source, and forming an image of the original on a recording medium such as a photoreceptor or an image sensor; A document image position viewing device for an image recording device, characterized in that, before starting slit N light scanning, the bar-shaped exposure light source is turned on to illuminate the document from the lower surface of the document support plate;