JPH03208065A - Image forming device - Google Patents

Abstract

PURPOSE:To set an image area in a transverse direction without wastefully using toner by interlocking a means for regulating the transverse direction of the image area on an original platen with a sharp cut means for deciding the end of the transverse direction of a latent image on a photosensitive body by exposure. CONSTITUTION:In the case of copying a part of the image of the original in the transverse direction in a state where a margin may be formed or copying a thick book, etc., the operation part 21a of the transverse direction regulating means 21 is adjusted to the width of the original 20. Since a sharp cut lamp 13 moves on the photosensitive drum 7 in the ratio of 1:1 through a lever 25 when the operation part 21a of the transverse direction regulating means is moved along a groove 22, a distance being the specified width is actually adjusted to the width of the latent image on the photosensitive drum 7. After performing the above-mentioned operation, a user depresses a copy starting button 18. By moving the sharp cut lamp 13 in the longitudinal direction of the photosensitive drum 7 from A to B, a non-image area(an oblique line part in figure) is formed on the drum 7. The photosensitive drum 7 in a shielding part 13b is not unnecessaryly irradiated with the light.

Description

DETAILED DESCRIPTION OF THE INVENTION "Field of Industrial Application" The present invention relates to an image forming apparatus that sets an image forming area in the width direction of a document and obtains the set image.

``Conventional Technology J'' With digital copying machines, you can obtain the desired image by inputting the coordinates of the range you want to copy using a digitizer, etc., and specifying the image area.Also, copying using a laser, LED array, etc. to form non-image areas In this machine, it was possible to specify an image area.

``Problem to be solved by the invention'' However, in conventional methods, when the desired image is part of a manuscript, and it is smaller than copy paper or a thick book, it is usual to create a margin with a manuscript presser called a pressure plate. This has the disadvantage that excess developer (hereinafter referred to as toner) is used to obtain an image. In addition, with the above-mentioned digital copying machine, it was attempted to obtain a desired image by inputting coordinates using a digitizer or the like to specify an image area, but this had the drawbacks that the device was expensive and the operation was complicated. . In addition, although there was a patented invention of a prior application in which the operator can visually check and easily restrict the width in the vertical direction, there has been no similar restriction in the width direction.

SUMMARY OF THE INVENTION An object of the present invention is to provide an image forming apparatus equipped with a widthwise image area specifying means that can easily determine the inner width direction of an image area.

"Means for Solving the Problems" The present invention projects an original image onto a photoreceptor to form an electrostatic latent image, develops the latent image to make it visible, and transfers it onto a transfer material to form an image. In a visual transfer type electrostatic image forming apparatus, there is provided a widthwise regulating means for an image area that is movable in the widthwise direction on the document table, and a sharp cut that defines the widthwise edge of the latent image on the photoreceptor by exposure. The image forming apparatus is characterized in that the width direction regulating means and the sharp cutting means are connected in an interlocking manner.

"Example" Embodiments of the present invention will be described below with reference to the drawings.

FIG. 6 is a longitudinal cross-sectional view of the image forming section of the electronic copying machine, and the relationship between each section will be described below. First, when the document on the document table glass 17 is irradiated with the document illumination lamp 1 running to the right, the reflected light is refracted by the mirror 3 running to the right together with the illumination lamp 1 to obtain image light. The image light is focused by an optical lens 2, and is moved to the right by a mirror 4, which moves at half the speed of the mirror 3.
The direction is changed in the opposite direction at step 5, reflected by a fixed mirror 6, and projected onto a photosensitive drum 7 for exposure. Note that the photosensitive drum 7 is used for original documents. It rotates in the direction of arrow a in synchronization with S@light lamp l. Further, the photosensitive drum 7 is uniformly charged by the charger 8. The photosensitive drum 7, which has been uniformly charged by the charger 8, is subjected to image exposure with the above-mentioned image light to form an electrostatic image. This electrostatic image is visualized by a developing device 9 using toner. On the other hand, the transfer material P conveyed by the paper feeding means is sent to the photosensitive drum 7 at a timing that is synchronized with the image on the photosensitive drum 7. Then, the toner image formed on the photosensitive drum 7 is transferred onto the transfer material P by the transfer discharger 10. Thereafter, it is separated from the photosensitive drum 7 by a known separating means. After transferring the toner image, residual toner on the photosensitive drum 7 is removed by a cleaning device 10a. After that, the pre-exposure lamp 12
The afterimage on the photosensitive drum 7 is removed by this. Further, the sharp cut lumen 13 forms a non-image area in the longitudinal direction of the photosensitive drum 7 before and after the above-mentioned electrostatic image formation. The blank shutter l4 is located on the optical path of the image light and is a means for determining whether or not to project the image light onto the photosensitive drum 7.

Next, a detailed embodiment of the present invention will be explained with reference to FIG. FIG. 1 is an external view of a copying machine using the present invention. A width direction regulating means 2l is provided on the document table T on the copying machine main body 15. A groove 22 is provided on the document table T in the width direction (x direction) outside the area covered by the pressure plate 6, and the operation section 2 of the ten width direction regulating stages 21 on the document table T is provided.
1a is guided in the groove 22 (see Figures 1 and 2).

As shown in FIG. 2, the width direction regulating stage 2l is such that the lower end of the lever 25 hanging down from the operating part 21a is connected to the support member 24.
are guided by. The support member 24 is fixed to the machine frame and
parallel to 2. A lamp stand 13a is fixed to the end of an arm 25a fixed to the lever 25 and perpendicular to the groove 22. The lamp stand 13a includes a flat shielding portion 13b extending perpendicularly to the longitudinal direction of the photosensitive drum 7, and the sharp cut lamp 1
3 is installed. The lamp stand 13a is guided by a rail 26 parallel to the groove 22. The rail 26 is fixed to the rock frame. Therefore, when the sharp cut lamp l3 is turned on, the light is irradiated onto one side of the photosensitive drum 7 in the longitudinal direction with the shielding portion 13b as a boundary, and no image is formed on this side.

When copying a part of the image of a document in the width direction to create a margin, or when copying a thick book, etc., the width direction regulating means 21 is used.
2. Align the operating section 21a with the edge of the original 20 (FIG. 1). Then, as shown in FIG.
When a moves along the full length 22, the sharp cut lamp 13 moves on the surface of the photosensitive drum 7 via the lever 25 at a ratio of 1:1, so that the specified width distance and the actual depth on the photosensitive drum 7 are This will match the width of the image.

After performing the above operations, the user presses the copy start button 18.

Next, the effect will be explained. FIG. 3 is a diagram showing the positional relationship between the sharp cut lamp 13 and the photosensitive drum 7. As shown in FIG. As shown in Figure 3, the sharp cut lamp 13 is connected to the photosensitive drum 7.
When the photosensitive drum 7 is moved from A to B in the longitudinal direction, a non-image area (the shaded area in the figure) is formed on the photosensitive drum 7. The shielding portion 3e 13b prevents unnecessary light from hitting the photosensitive drum 7.

As explained above, the following effective examples can be obtained by using in a copying machine a means that allows the operator to visually check and limit the image area, and a sharp cut means that is mechanically connected to the limiting means. .

When a thick book or the like is used as a document, the pressure plate 16 shown in FIG. 1 does not close completely, and the parts other than the document appear black on the image. In order to prevent this, by moving the operating part 21a of the width direction regulating means and aligning it with the edge of the book,
The toner does not get on parts other than the above-mentioned original, and unnecessary 1.
This makes it easy to reduce the use of dryers.

It is also possible to copy a part of the original image to create a blank space.

"Embodiment 2" As shown in FIG. 4, instead of the sharp cut lamp, a sheet 30 capable of reflecting the light of the document illumination lamp 1 is provided along the lower surface of the document table glass 17 so as to be movable in the direction of the arrow shown in the figure. By fixing the sheet 30 to the width direction regulating means 2l and making it movable from the document table T, a non-image area is formed.

“Example 3” As shown in FIG. 5 (al. fb), the pre-exposure lamp 1
A mirror 31 that guides the light of 2 onto the surface of the photosensitive drum 7 between the charging device 8 and the developing device 9 is provided, and a shutter 32 that is movable in the longitudinal direction of the photosensitive drum 7 is provided on the optical path that blocks the light to the mirror 31. 4. The shutter 32 and the arm 25 of the lever of the width direction regulating means.
a, so that the position of the shutter 32 can be changed by the operating section 21a of the width direction regulating means 21, thereby forming an image area and a non-image area.

[Effects of the Invention] As explained above, when the original is smaller than the paper and a pressure plate cannot be used, or when the desired image is a part of the original, it is possible to save wasted toner by using a simple operation. You can set the image area.

[Brief explanation of drawings]

Fig. 1 is a perspective view showing the external appearance of an embodiment of the present invention, Fig. 2 is a perspective view showing the relationship between the width direction regulating means and the sharp cut lamp, and Fig. 3 shows the positional relationship between the sharp cut lamp and the photosensitive drum. 4 is a perspective view showing the second embodiment, FIG. 5 ia) is a longitudinal sectional view showing the third embodiment, and FIG.
FIG. tb+ is a plan view of FIG. 5(a), and FIG. 6 is a diagram illustrating an image forming section of a copying machine embodying the present invention. 1. Original illumination lamp 12. Pre-exposure lamp 13.
・Sharp cut lamp 21 ・Width direction regulating means 22
・Groove 25・・Lever 30・・Seat 31・・Mirror 32・・Shutter

Claims (1)

[Claims] 1. A visual transfer type electrostatic image in which an original image is projected onto a photoreceptor to form an electrostatic latent image, and the latent image is developed and transferred onto a transfer material to form an image. In the forming device,
The width direction regulating means and the sharp cutting means are provided, and the width direction regulating means and the sharp cutting means are provided. An image forming apparatus characterized in that the image forming apparatuses are connected in an interlocking manner.