JPS63123080A - Copying machine for writing on board - Google Patents

Abstract

PURPOSE:To stabilize positioning and to take a sharp copy deciding as the projection point of a positioning part the periphery on the extension of a straight line connecting the support point of a support table and a projection point on the same plane with the composite center of gravity between a copying machine and the support table. CONSTITUTION:The left end part of the support table 3 of the copying machine is supported rotatably on a pole 7, and the right end part is supported by a support table receiving part 11, which is formed of trapezoidal grooves 32 and 33 corresponding to rollers 12 and 13. The projection point of this receiving part 11 on the plane of a support table positioning part (consisting of a roller and a groove 32) is provided on or nearby the extension of the straight line connecting the center point of the pole 7 and the projection point of the composite center G of gravity between the copying machine 2 and support table 3 on the same plane, and consequently the support table 3 where the copying machine 2 is mounted is positioned stably at a board writing copy position and a distinct copy is taken.

Description

[Detailed Description of the Invention] [Technical Field] The present invention makes it possible to copy image information recorded on a board serving as a display section, and also makes it possible to copy a manuscript placed on a manuscript table of an electrophotographic copying device. This invention relates to a blackboard copying device.

[Prior art]

Conventionally, in devices that make it possible to copy information written on a board, the board reading method generally uses a plane scanning method using a COD sensor as a solid-state image sensor, and the recording method generally uses a thermal recording method. This type of digital method not only cannot copy the calligraphic information on the board onto plain paper, but also has a low recording speed, so it takes time to copy several other sheets, and the resulting recording density is about 6 dots l/m.
It is about m.

Therefore, a method of recording information written on a board using an electrophotographic method has recently been proposed. This type of method includes a method in which information written on a board is directly imaged onto a belt or drum-shaped photoreceptor of a conventional electrophotographic copying machine, and is copied onto a plain paper transfer plate using a known electrophotographic process. The information written on the board is imaged once on a field lens installed on the manuscript table, and then the image is formed on a photoreceptor through the optical system in the electrophotographic copying machine, and transferred to a transfer material using a known electrophotographic process. There are methods such as transferring and copying.

In any case, both can copy the original placed on the manuscript table and the information written on the board onto plain paper, and have improved recording density compared to conventional digital methods. Also, when obtaining a large number of copies, if after copying a board document several times, the transfer material obtained by the copying is used as a copy original to make a second copy, thereby eliminating wasted time due to copying speed.

However, the position of the electrophotographic copying machine is different between a board copying mode in which information written on a board is copied and an original copying mode in which an original on a document table is copied. In other words, when in the board copy mode, the copying machine is placed below the board main body,
When in the original copying mode, it is desirable to place it in a place pulled out in front of the main body of the board for space utilization and functions such as opening and closing of the original pressure plate. In such a case, when the copying machine is moved from the original copy mode position to the board copying mode position, it is necessary that the copying machine be accurately positioned at a predetermined position in the board copying mode. This is because when the board is moved to the board copy mode position, if the board and the copying machine are not in the correct positions relative to each other, uneven light intensity and image distortion will occur, making it impossible to obtain good copies.

[Purpose of the invention]

The present invention has been made in view of two points, and is to copy image information written on a board serving as a display section from a position in a manuscript copy mode for copying a manuscript placed on a manuscript table. To provide a board copying device in which an electrophotographic copying device is stably and accurately set on a board main body when the device is moved to a board copying mode position.

[Summary of the invention]

That is, according to the present invention, there is provided a display device having a writable display section, a first position for copying the image information written on the display section, and a second position for copying the original image on the document mounting table.
In a board copying device equipped with a position and a copying device that is selectively movable,
Record 1. It has a support means that allows the copying device to be moved to a second position, and the positioning portion of the support means aligns the support point at which the support means is supported with the center of gravity of the support means when the copying device is placed. Since a board copying device is provided in which the projection point of the positioning section is located at or near the extension line of a straight line connecting the respective projection points projected on a plane, the copying device can be stably operated. Moreover, accurate positioning is possible.

〔Example〕

Embodiments of the present invention will be described below based on the drawings of FIGS. 1 to 4. Note that the same members are indicated by the same symbols in FIGS. 1 to 4.

As shown in FIG. 4, in the board main body 1 which is a display device,
The sheet 43 is a white or light-colored flexible board member such as a wide synthetic resin belt, and is stretched between an upper roller 44 and a lower roller 45 to constitute a display section. This sheet 43 is placed on the upper roller 44. It is movable by rotating the lower roller 45 in the direction of the arrow, and at this time, image information written on the board is scanned and projected onto the photoreceptor by an optical system to be described later.

Desired image information is written on the board of the sheet 43 using a writing instrument on the side shown at A, and the information written on the board is illuminated and scanned by a lamp 46 at the position of B by rotation of the upper roller 44° and the lower roller 45. . The optical system is composed of a first mirror 47, a second mirror 48, and a lens 49, and the board information at the scanning position B is reflected downward via the first mirror 47 and second mirror 48, and is transmitted to electronics through the lens 49. The image is projected onto a photoreceptor 57 within the photocopying device 2.

On the other hand, at the top of the copying device 2, there are provided a document mounting table glass 52 that reciprocates in the horizontal direction and a pressure bonding plate 51 for holding down the document. When an original is scanned, an optical image of the original placed on the original placing table glass 52 is transferred to the photoreceptor 57 by an imaging optical system consisting of a lens 54 disposed within the electrophotographic copying device 2. is imaged and exposed. and photoreceptor 5
The image formed at 7 is made into a copy image by a well-known electrophotographic process. Note that illustration of the electrophotographic process is omitted.

Further, when copying on a board, the original platen glass 52 moves to the right, and the opening/closing cover 55 rotatably supported on the left end of the original platen glass 52 is supported below the board main body 1. The clamp arm 50 rotates counterclockwise. The board information is once formed into an image on a field lens 53 disposed on the left side of the pressure bonding plate 51 , and is projected onto a photoreceptor 57 through a lens 54 . Therefore, if the electrophotographic copying device 2 and the support stand 3 supporting the copying device are not set in the correct position, the board information will not be imaged on the field lens 53.

Next, the positional relationship between the board main body and the copying device will be explained using FIGS. 1, 2 and 3.

The board book body l is supported at a predetermined height from the floor by left and right poles 7.8. poles 7.8 each have legs 5,
It is supported vertically by 6. The left end of the copying device support stand 3 is rotatably supported by a pole 7 so that the electrophotographic copying device 2 is disposed below the board main body 1, and the right end of the copying device support stand 3 is supported by a positioning member, which will be described later. Supported by A movable leg 4 is provided at the lower right end of the copying device support stand 3. The electrophotographic copying device 2 is set on a copying device support stand 3 with the paper ejection tray 9 facing the front side of the board main body 1 and the paper feeding section facing the back side. As shown in FIG. 2, during the original copy mode, the copying device support stand 3 is rotated approximately 90 degrees clockwise about the pole 7 (as shown by the two-dot chain line). Therefore, the position of the copying machine indicated by the solid line in FIG. 2 is when it is in the board copying mode.

In addition, part 11 of the copying device support stand holder for supporting the right end of the copying device support stand 3 when copying on a board is fixed to the pole 8.
3 is rotatably provided. An inclined portion 31 is provided at the lower right end of the copying device support 3, an inverted V-shaped groove 32 is provided at a location corresponding to the roller 12 of the copying device support 3, and an inverted V-shaped groove 32 is provided at a location corresponding to the roller 13. Trapezoidal grooves 33 are provided respectively.

On the other hand, as shown in the second figure, in the board copying mode, the projected point of the center of gravity G of the combined weight of the electrophotographic copying device 2 and the copying device support stand 3 is located on the straight line m connecting the centers of the roller 12 and the pole 7. or in the vicinity of straight line m and roller 1
3 and the center of the pole 7, and the above-mentioned straight line m is located. Therefore, roller 12 and reverse V
Most of the center of gravity G acts on the letter-shaped groove 32, and only a small amount of weight acts on the roller 13 and the trapezoidal groove 33.
The copying device support stand 3 is securely positioned by the engagement of the inverted V-shaped groove 32 with the inverted V-shaped groove 32. Therefore, as described above, the image information on the board is always focused on the field lens 53 and projected onto the photoreceptor 57 via the lens 54. In addition, the center of gravity G is the support point of the support stand 3, which is the pole 7 and the roller 1.2.
．． The positional stability is good because the pole 7 is located within the triangle formed by the pole 7 and the center of gravity G. According to the device of this embodiment, the center point of the pole 7 and the center of gravity G are projected onto the same plane. Since the projection point of the positioning portion of the support stand 3 (consisting of the roller 12 and the groove 32) onto the above-mentioned plane exists on the extension line of the straight line connecting the projection points or in the vicinity thereof, the copying device 2 cannot be placed. The supported base 3 is stably positioned.

Incidentally, in the explanation of the above embodiment, the inverted V-shaped groove 32 and the trapezoidal groove 33 were provided on the copying device support stand 3, but the fifth embodiment
As shown in the drawings and FIG. 6, rollers 61 and 62 are provided on the side of the copying device support stand 60, and a 7-shaped groove 64 and an inverted trapezoidal groove 65 are provided on the side of the part 63 of the copying device support stand holder. can be done similarly. Also in this example, the composite center of gravity G of the copying device 2 and the copying device support 6o and the copying device support 60 are
If the 7-shaped groove 64 as a positioning part and the roller 62 are positioned on the extension of the straight line connecting the projected points on the same plane as the rotation center of the image forming apparatus, as in the previous embodiment, the copying apparatus will be stabilized. Sex increases.

Further, as shown in FIG. 7, the cross-sectional shape of the portion 69 of the receiver of the copying device support stand 6o is made to be continuous with the V-shaped groove 7o and the inclined portion 71 whose height decreases as it advances toward the 7-shaped groove 70. The shape allows for more accurate positioning.

That is, the rollers 6B and 67 placed on the inclined portion 71 are moved gently to the right in the drawing by the thrust force due to their own weight. Then, as the roller 68 falls into the figure 7-shaped groove 70, the movement of the copying device support stand 60 is stopped. By adopting such a shape, the operator can be clearly notified of the positioning by feeling the roller 68 fall into the groove 70.

In the above explanation, the copying device 2 is moved by rotating the copying device support stands 3 and 60 about the ball 7 as the center point, but as shown in FIG. The same thing can be done even if the stand is pulled out. The board main body and the electrophotographic copying device are the same as those shown in FIG. 4, so their description will be omitted.

A ball 82 vertically supported by a leg 80 and a ball 83 vertically supported by a leg 81 are respectively at predetermined heights, and the copying device support pedestal horizontally supports portions 86 and 87. The copying device support base is part 86. Reference numerals 87 each consist of a moving member and a slide guide portion (none of which is shown) that guides the moving member, and the two moving members are attached to the rear surface portions on both the left and right sides of the copying device support stand 85. A copying device 84 is set on the top of the copying device support stand 85 . The copying device support stand 85 shown by a solid line shows the state in the board copy mode, and the copying device support stand 85 shown by a two-dot chain line shows the state in the original copy mode. The copying device support base is part 86.
．． Near the center of 87 is a roller 8 as a positioning member.
8°89 are provided rotatably. Inverted V-shaped grooves 90 are formed at both left and right ends of the back surface of the copying device support base 85 so as to fit correspondingly to the rollers 88 and 89 during the board copying mode. In this example, there are two inverted V-shaped grooves 90 and a roller 88 . 89, the electrophotographic copying device 84
The positioning section is arranged so that the projected point of the center of gravity G of the composite of the weights 1 and 1 of the copying device support stand 85 exists. Therefore, as mentioned above, when the board copy mode is used, the electrophotographic copying device 8
4 is held horizontally, and the image information on the board is accurately projected onto the photoreceptor. In addition, in the case of this example, the copying device support stand 8
The fulcrum on which 5 is supported also serves as the positioning portion.

〔Effect of the invention〕

As explained above, according to the present invention, when the copying device support is set in the board copy mode, the support is stably positioned, so that clear copies can always be made in the board copy mode. can.

[Brief explanation of the drawing]

1 is a top view of the device shown in FIG. 2, viewed from above, with the board writing omitted; FIG. 2 is a perspective view of a board copying device showing an embodiment of the present invention; FIG. 3 is a main part of the positioning section FIG. 4 is a schematic explanatory diagram of the board book body 1 and the copying device 2, FIG. 5 is a sectional view of a main part of another embodiment of the positioning section, and FIG. 6 shows another embodiment of the present invention. FIG. 7 is a sectional view of a main part of still another embodiment of the positioning unit; FIG. 8 is a top view showing still another embodiment of the present invention, with the board omitted; FIG. FIG. 9 is a sectional view of a main part of the positioning member shown in FIG. 8. l... Board main body 2.84... Electrophotographic copying device 3, 60. 85... Copying device support stand 4, 5.6
．． 80.81... Leg 11, 63. 69. 87... Copying device support stand holder is part 12, 13. 61. 62. 67, 68.
88. 89...roller 32, 64. 70. 90...7-shaped groove No. 8 q Cr- to V2]■] ±84 and 83

Claims (1)

[Claims] (1) a display device having a writable display section; a first position for copying image information written on the display section;
A board copying device comprising a second position for copying a document image on a document table and a copying device selectively movable to the second position,
It has a support means for mounting and supporting the copying apparatus so as to be able to move the copying apparatus to the first and second positions, and the positioning part of the support means has a support point on which the support means is supported and a copying apparatus. The projection point of the positioning part is located on or near the extension of a straight line connecting the projection points of the center of gravity of the support means when the device is placed on the same plane. Characteristic board copying device.