JPH01217488A - Recording device for writing on board - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention relates to a board recording device capable of recording both information written on a board and a document placed on a document table.

(Prior Art) As such a board writing device, there is a board writing device 100 as shown in FIG. In the figure, reference numeral 101 denotes a white to light-colored flexible board member made of a wide synthetic resin belt or the like, and is stretched between rollers 102 and 103.

The board writing member 101 is approximately flat in the vertical direction, and is movable by rotating rollers 102 and 103 in the direction of the arrow. At this time, the information written on the board is scanned and projected onto a photoreceptor by an optical system to be described later. be done. The board member 101 includes A
On the side shown in , desired information is written on the board using an appropriate writing instrument, and the information written on the board is illuminated and scanned by a lamp 104 at a position 101a by rotation of rollers 102 and 103. . Reference numeral 105 denotes a copying process section, which has an electrophotographic photoreceptor 107 inside a box 106 that rotates in the direction of the arrow. Along the rotation path of the photoreceptor 107, a photoreceptor charging device, a developing device, a transfer charging device, and a cleaner are provided. Fixing devices for fixing the toner images are also provided at predetermined positions, but since these are well known, their explanation will be omitted.

A movable document table 108 is attached to the upper part of the box body 106. In the original copy mode, an original to be copied such as a document is placed on the original table 108, and the table 108 moves forward in the direction of the arrow substantially perpendicular to the moving direction of the member 1 to scan the original. When scanning of the original is completed, the table 108 returns to the home position. When scanning a document, the image of the document placed on the table 108 is captured by a lens 116 placed inside the box 106.
An image is formed on the photoreceptor 107 by an imaging optical system consisting of the following. This exposure position is between the photoreceptor charger and the developer. Note that the imaging optical system projects an image of the document portion located at position C, which is a fixed position with respect to the box 106, onto the photoreceptor 107.

On the other hand, in the board copy mode, the field lens 112 is placed in contact with or close to the document table 108 at the C position. During board copying, the document table 108 moves in the direction of the arrow, and when the field lens 112 reaches position C, it is fixed.

The image of the board scanned at the position 101a is projected onto the field lens 112, and its optical system is based on the first. Second mirror 113, 114, lens 115
It has

The first mirror 113 is arranged above the belt and the lamp 10
The second mirror 114 reflects the light from the first mirror 113 downward along the board. Then, the lens 115 receives the light from the second mirror 114 and
The image of the board part at 01a is captured by the field lens 112.
image is formed. The image formed on this field lens 112 is transferred and imaged onto the photoreceptor 7 by an imaging optical system consisting of a lens 116 at the same position as in the original copy mode. Note that 120 indicates the optical path of light reflected from the board.

(Problems to be Solved by the Invention) However, according to the board recording device 100 according to the prior art, in the copy process section 105, the length in the longitudinal direction of the photoreceptor 107 and the developing device (not shown in the figure) is the maximum In order to maintain the same configuration up to the edge of the width (because the development conditions will change if there is a sudden change in configuration), it is several mm longer than the width of the copy paper. Therefore, since the light from the image does not reach areas other than the original copy image width, toner always adheres to the photoreceptor 107, resulting in an increase in toner consumption. In order to solve this problem, conventionally, for example, a member that reflects the light illuminating the original is attached to both ends of the lens 116 at a position exceeding the maximum original width, and the potential at both ends of the photoconductor 107 is lowered to prevent toner from getting on the photoreceptor 107. I was doing it.

However, although it works well in normal document copy mode, the document illumination lamp does not light up in board copy mode.
There was a problem in that light did not reach both ends of the photoreceptor 107 and toner adhered to both ends.

In order to solve this problem, a proposal has been made to arrange a reflective member 130 such as a white plate as a shadow erasing member near the board member 101 as shown in FIG. However, in this case, even if the reflective member 130 is located near the board member 101, a gap may occur between the board member 101 and the reflective member 130, and that portion may become a shadow, making it incomplete for eliminating shadows. .

The present invention has been developed in view of the above-mentioned problems, and its purpose is to prevent toner from adhering to both ends of the photoreceptor when copying a board or original, thereby preventing shadows from forming on both ends of copy paper during copying. It is an object of the present invention to provide a board recording device with improved performance that can prevent such occurrence and reduce toner consumption.

(Means for Solving the Problems) The present invention having the above object has a first imaging optical system including a light source for illuminating a writable board, an imaging lens for projecting the board on a photoreceptor, and a reflecting mirror. and a second imaging optical system for forming an image of a copying original on the photoreceptor, and is capable of selectively copying either image information of a board or a copying original. Reflective members were provided at both ends of the reading area on the document so as to be in close contact with the board.

(Function) According to the present invention, the light from the light source is reflected at both ends of the reading position on the board and is directed onto the photoreceptor through the imaging optical system consisting of a mirror, a lens, a field lens, and a lens. By providing a reflective member that leads to the paper in close contact with the paper board, shadows are prevented from being formed at both ends of copy paper during copying, and toner is prevented from being wasted by adhering to a photoreceptor.

(Embodiments) The present invention will be described below based on illustrated embodiments. Referring to FIG. 1, reference numeral 1 denotes a board member made of a flexible sheet, which is passed over rollers 2. As shown in FIG. Reference numeral 4 denotes a light source that illuminates the board member 1, and illuminates the board in the form of a slit. The light reflected from the board member 1 passes through the first reflection mirror 13
reflected. The light reflected by the first reflecting mirror 13 is reflected by the second reflecting mirror 14 and reaches the field lens 12 via the lens 15. The field lens 12 is fixed when the document table 8 on which the field lens 12 is placed moves in the direction of arrow A and the field lens 12 comes to position C. Reference numeral 6 denotes a box, and inside the box 6, a lens 100 that receives light that has passed through a field lens 12 and a photoreceptor 7 that is exposed to an image that has passed through the lens 100 are arranged. The above optical system that projects the image on the board onto the photoreceptor 7 in this way is referred to as a first imaging optical system. Further, an optical system for forming a slit-shaped image of the original image for copying on the photoreceptor 7 is referred to as a second imaging optical system.

On the other hand, sharp-cut reflective members 20 are placed at both ends of the effective reading width X of the board image reading area 1a on the board member 1.
is provided. The reflective member 20 has a mirror surface, one end of which is in close contact with the board member 1, and is attached at an angle so as to guide the light from the light source 4 to the photoreceptor 7, as shown in FIG.

In order to bring the reflective member 2o and the board member 1 into close contact with each other, as shown in FIG. In addition, as shown in FIG. 2, the reflecting member 20 is made to be rotatable with the supporting rod 21 so that it comes into close contact with the board member 1 due to gravity.
Attachment is done by adjusting the angle of the reflecting member support rod 21 so as to move toward both ends of the reflecting member support rod 21.

FIG. 3 shows a second embodiment of the board recording device of the present invention. In this embodiment, a rod 22 is provided below the rod 21. One or more springs 23 are connected to the rod 22 with one end attached to the rod 22.
Attach the other end to the reflective member 20 and fix it. With such a configuration, the reflective member 20 can be firmly attached to the board member 1.

Further, as a third embodiment, the portion of the reflective member 20 that contacts the board can be formed of a soft member to prevent the reflective member 2o from scratching the board member 1.

Note that in the first, second, and third embodiments described above, the reflecting member 20 uses a mirror surface in which the specular reflection component is the main component.
The light from the light source is regularly reflected on the surface of the reflecting member, and the photoreceptor 7
The top is exposed. However, each of the above-described embodiments can also be implemented by making the surface of the reflecting member a diffusing surface, attaching the reflecting member 1o at an angle where the light from the light source 4 is most efficiently diffused and reflected, and exposing the photoreceptor 7. The same effect can be obtained as with . In addition, since the light reflected by using a diffusive surface has an intensity above a certain level within a certain range of angles, the angle can be adjusted more easily than when the reflecting member 10 is a mirror surface that only has specular reflection components. Become.

As mentioned above, by using the sharp-cut reflecting member 2o, the non-images at both ends of the photoreceptor 7 are exposed to light during copying on the board, and the potential on the photoreceptor 7 drops, so that toner adhesion is eliminated and the toner is removed. The problem of waste is solved. In addition, in the present invention, since the reflective member 2o for sharp cutting is brought into close contact with the board member 1, the shadow of the reflective member 20 caused by the light source 4 is not formed on the board member 1, so that black streaks on the copied image due to this shadow are caused. This makes it possible to prevent the occurrence of the problem, and to accurately determine the position of the boundary of the effective image area.

Further, by making the reflective member 20 softer than the synthetic resin belt member 1, scratches on the board can be avoided.

(Effects of the Invention) According to the present invention, reflective members are provided at both ends of the reading area illuminated in the form of a slit on the board so as to be in close contact with the board. Toner adhesion is eliminated, and toner waste can be prevented.

Furthermore, since the reflective member is brought into close contact with the board, it is possible to obtain a clear image without generating black streaks on the copied image.

[Brief explanation of the drawing]

FIG. 1 is a partially enlarged view of the board recording device of the present invention, FIG. 2 is a perspective view of the reflective member shown in FIG. 1, FIG. 3 is a perspective view showing another embodiment of the reflective member of the present invention, and FIG. The figure is a schematic explanatory diagram of a board writing recording device of the present invention, and FIGS. 5 and 6 are schematic explanatory diagrams of a board writing recording device according to the prior art. Explanation of symbols 1... Board member 2... Roller 4... Light source 6... Box 7... Photoreceptor 12... Field lens 13... First reflecting mirror 14... Second reflecting mirror 15...Lens 20...Reflecting member Soi/Representative Patent attorney Back 1) Noriyuki - Figure 4 Figure 5

Claims (1)

[Claims] a first imaging optical system including a light source for illuminating a writable board, an imaging lens and a reflecting mirror for projecting the board onto a photoreceptor; and a second imaging system for forming a document image for copying onto the photoreceptor. In a board recording device which is equipped with an optical system and is capable of selectively copying either the image information of the board or the manuscript for copying, reflective members are provided at both ends of the reading area on the board so as to be in close contact with the board. A board recording device characterized by: