JPS6220542B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an electrostatic copying apparatus, and more particularly, to an electrostatic copying apparatus, and more particularly, to an electrostatic copying apparatus, and more particularly, to an electrostatic copying apparatus, the invention relates to relative movement between an original document placement mechanism for holding an original to be copied, and an optical system for projecting an image of the original. The present invention relates to an electrostatic copying apparatus of a type in which a roll of copy paper is unwound and cut into a required length in synchronization with scanning of an image of an original document.

Conventionally, electrostatic copying devices form an electrostatic latent image corresponding to an image of an original on a photosensitive member having a photoconductive layer, and then apply toner to this electrostatic latent image to form a toner image. A so-called toner image transfer device, which later transfers this toner image to copy paper, thus producing a copy with a copy image corresponding to the image of the original, deposits an electrostatic charge corresponding to the image of the original on a photosensitive member having a photoconductive layer. A copy that forms a latent image, then transfers this electrostatic latent image to copy paper, and then applies toner to the electrostatic latent image on the copy paper to form a toner image, thus having a copy image corresponding to the image of the original document. An electrostatic latent image corresponding to the original image is formed directly on the copy paper using a so-called electrostatic image transfer device that generates a photoconductive image, or a copy paper having a photoconductive layer, and then this electrostatic latent image is There are so-called direct devices that apply toner to form a toner image, thus producing a copy having a copy image corresponding to the image of the original.

In any of the above-mentioned electrostatic copying devices, in order to form an electrostatic latent image corresponding to the image of the original, a document placement mechanism for holding the original to be copied is provided to the optical system. (original moving method), or the optical system is moved relative to the document placing mechanism (optical system moving method; when all the components of the optical system are moved, and when only some of the components of the optical system are moved) The image of the original document is scanned and projected onto a photosensitive member having a photoconductive layer or copy paper having a photoconductive layer. Furthermore, in synchronization with the scanning of the original image, copy paper on which a copy image is to be formed is conveyed.

The copy paper transport system for transporting the copy paper in synchronization with the scanning of the original image is of a type that unwinds a roll of copy paper and cuts the unwound copy paper;
In other words, in the case of a type that includes a rolled copy paper supply mechanism that unwinds rolled copy paper and a rolled copy paper cutting mechanism, the rolled copy paper supply mechanism is operated in synchronization with the scanning of the image of the original document. In addition to starting to unwind the rolled copy paper, when the rolled copy paper has been unwound by a predetermined length, a copy paper cutting mechanism is activated to cut the copy paper into a length corresponding to the length of the original. It is necessary to cut (so-called random cut) or cut to a predetermined standard length.

Therefore, in conventional electrostatic copying apparatuses, for example, an actuator rotates in conjunction with the rotation of a rotating drum having a photosensitive member on its surface, an actuator that is moved in conjunction with the movement of an original placing mechanism, or an optical system. A limit switch, which is operated by a child to operate a copy paper cutting mechanism, is installed in an adjustable manner, and the position of this limit switch is adjusted according to the desired copy paper cutting length (for example, in Japanese Patent Application Laid-Open No.
(Please refer to Publication No. 49-53838).

However, in such a known configuration, the mounting mechanism and position adjustment mechanism of the limit switch are relatively complicated and expensive. There are problems such as the need to adjust the position of the limit switch depending on the length of the document.

In view of these facts, the present inventors first prepared the specification and drawings of Japanese Patent Application No. 53-43254, particularly the specification no.
Page 123, line 10 to page 146, line 4 from the bottom and the first
As shown in FIGS. 6 and 17, (a) In the document placement mechanism placed on the housing of the electrostatic copying device, at least one edge of the transparent plate on the inner surface of the document holding member is The corresponding predetermined width portion has dark color characteristics, and (b) inside the transparent plate,
The transparent plate extends with a predetermined width along one edge of the transparent plate from the tip to the rear end, and the length from the tip of the transparent plate is adjustable, and the inner surface has bright color characteristics. disposing a copy paper cutting length indicating member having
(c) Furthermore, within the housing of the electrostatic copying device, an image of the original placed on the transparent plate and covered by the original pressing member is placed between the original placing mechanism and the housing. A photodetector is provided for detecting a change in reflectance by receiving reflected light at the one edge of the transparent plate when the transparent plate is scanned by relative movement with a disposed optical system. proposed an electrostatic copying apparatus configured such that when the photodetector detects a change in the reflectance, a copy paper cutting mechanism of a copy paper transport system is activated in response.

In the above-mentioned electrostatic copying apparatus previously proposed by the present inventors, when it is desired to cut a roll of copy paper into a length corresponding to the length of an original (so-called random cut), Make the length of the above-mentioned indicator member sufficiently short from the tip of the transparent plate (generally, to the minimum copy paper cutting length), and then insert the leading edge of the original into the transparent plate as in the case of normal copying operations. It is only necessary to place the original on the transparent plate by aligning the leading edge and aligning one edge of the original with the one edge of the transparent plate, and then covering the original with the original pressing member.
In this way, since most of the originals to be copied have one edge that is essentially a blank space and a bright color such as white, the one edge of the transparent plate is visible from the tip of the transparent plate to the optical system. In the range up to the rear edge of the document, the bright color of one edge of the document, which is essentially a blank space, is exposed, and in the range behind the rear edge of the document, the dark-colored part of the document holding member is exposed, and the dark color of the document is exposed. There will be a significant change in reflectance at the rear end. Therefore, when the document placement mechanism and the optical system are moved relative to each other to scan the document image, the photodetector detects a significant change in reflectance at the trailing edge of the document, and in response to this detection, copying is performed. The rolled copy paper cutting mechanism of the paper conveyance system is operated, and the rolled copy paper sent out in synchronization with the scanning of the image of the original is cut into a length corresponding to the length of the original.

On the other hand, if it is desired to cut a roll of copy paper to a predetermined length (for example, a standard length) without depending on the length of the original, in very rare cases, one edge of the original may be black. If the document is dark in color, or if it is not desirable to align one edge of the document with one edge of the transparent plate (although this is extremely rare), adjust the indicator and place the document on the transparent plate. What is necessary is to set the length of the indicating member from the tip to the required copy paper cutting length. In this way, at the one edge of the transparent plate, the inner surface of the indicating member having bright color characteristics is exposed in the range from the tip of the transparent plate to the rear end of the indicating member, and the rear end of the indicating member is exposed to the optical system. In the rear range, a portion of the document holding member (or one edge of the document) having dark color characteristics is exposed, and the reflectance changes significantly at the rear end of the indicator member. Therefore, when scanning an image of a document, a significant change in reflectance at the rear end of the pointing member is detected by the photodetector, and thus the required length set by the pointing member is detected by the photodetector. The rolled copy paper is then cut.

Therefore, according to the above-mentioned electrostatic copying apparatus proposed earlier by the present inventors, it is desirable to cut the rolled copy paper into a length corresponding to the length of the original. In general, it is possible to automatically cut a roll of copy paper into a length corresponding to the length of the original without requiring any special operations other than those required for normal copying operations. Furthermore, when it is desired to cut a roll of copy paper into a predetermined length (for example, a standard length) without depending on the length of the original, the above-mentioned instructions having a relatively simple and inexpensive structure may be used. By appropriately adjusting the members, the rolled copy paper can be cut to a predetermined length.

However, the electrostatic copying apparatus as described above previously proposed by the present inventors is still not fully satisfactory, and there are the following problems to be solved.

That is, in normal copying operations, it is normal to place the original on the transparent plate with one edge of the original aligned with the one edge of the transparent plate, and there are cases where it is desirable to do so. However, in the above-mentioned electrostatic copying apparatus proposed earlier by the present inventors, one edge of the document is substantially a margin and is brightly colored, such as white (in fact, most of the documents are white). one edge is essentially a blank space) and it is desired to cut the roll of copy paper to a length smaller than the length of the document (therefore, the cut length of the roll of copy paper is
(When setting a predetermined length smaller than the length of the original using the indicating member), shift one edge of the original with respect to the one edge of the transparent plate, and place the original on the one edge of the transparent plate. It is necessary to prevent it from being located. When one edge of the document is aligned with the one edge of the transparent plate and placed on the transparent plate, the indicating member is adjusted so that the length of the indicating member from the tip of the transparent plate is set to a desired length smaller than the length of the original. Even if the cutting length of the copy paper is set, the inner surface of the indicating member having a bright color property in the range from the tip of the transparent plate to the rear end of the indicating member is visible at the one edge of the transparent plate relative to the optical system. In addition to being exposed, the light color of one edge of the document, which is essentially a margin, is exposed in the range from the rear end of the indicating member to the rear end of the document, and the dark color characteristic of the document holding member is exposed. , the bright color characteristic continues to the rear end of the document. Therefore, when scanning an image of a document, the photodetector detects a change in reflectance only at the trailing edge of the document, and therefore, the roll of copy paper does not reach the predetermined value set by the indicating member. The paper is cut to a length that corresponds to the length of the document, rather than to a length that is smaller than the length of the document.

The present invention has been made in view of the above facts, and its main purpose is to skillfully solve the above-mentioned problems existing in the electrostatic copying apparatus previously proposed by the present inventors, and to improve the quality of original documents. Even if one edge of the copy paper is substantially a blank space, such as white, and it is desired to cut the roll of copy paper into a length smaller than the length of the original, regardless of the position where the original is placed ( Therefore, even if one edge of the original is aligned with one edge of the transparent plate and placed on the transparent plate, the new and improved stationary paper roll can be cut to the desired length. An object of the present invention is to provide an electronic copying device.

According to the present invention, the housing includes: a transparent plate for placing a document to be copied; and a document holding member for covering the document placed on the transparent plate; and a document holding member mounted on the housing. a document placement mechanism; a copy image forming means disposed within the housing, including an optical system for projecting an image of the document placed on the transparent plate; the document placement mechanism and the optical system. a roll-shaped copy supply mechanism for unwinding a roll-shaped copy paper and a roll-shaped copy paper cutting mechanism for conveying the copy paper in synchronization with scanning of the image of the original document performed by relative movement with the original document; In an electrostatic copying apparatus equipped with a copy paper conveyance system; Adjacent to the transparent plate, extending with a predetermined width along one edge of the transparent plate from the front end to the rear end of the transparent plate; a copy paper cutting length indicating member whose length from the tip of the transparent plate is freely adjustable; An auxiliary member is movably mounted along one edge of the indicator member and can be selectively positioned at the rear end of the indicator member, and the inner surface of the indicator member is either light-colored or dark-colored. and the inner surface of the auxiliary member has the other characteristic of being light or dark; and within the housing, the one edge of the transparent plate is disposed when the image of the document is scanned. A photodetector is provided for detecting a change in reflectance by receiving reflected light at the section, and when the photodetector detects a change in reflectance, the copy paper cutting mechanism is activated in response to the change in reflectance. An electrostatographic reproduction device is provided that is configured to be actuated.

Further, according to the present invention, the housing includes: a transparent plate for placing an original to be copied; and an original holding member for covering the original placed on the transparent plate, and the housing is mounted on the housing. a copy image forming means disposed within the housing, including an optical system for projecting an image of the original placed on the transparent plate; the original placing mechanism; A rolled copy paper supply mechanism for unwinding a roll of copy paper and a rolled copy paper for transporting the copy paper in synchronization with scanning of the image of the original document performed by relative movement with the optical system. an electrostatic copying apparatus equipped with a copy paper conveyance system including a cutting mechanism; a copy paper cutting length indicating member adjacent to the transparent plate and extending with a predetermined width along one edge of the transparent plate;
An auxiliary member extending a predetermined width along one edge of the transparent plate is disposed, and the indicating member extends from the tip of the transparent plate to the rear end of the transparent plate by the minimum copy paper cutting length. a stationary part that extends toward the stationary part; and a stationary part that is mounted above the stationary part so as to be movable along the one edge of the transparent plate, and protrudes from the rear end of the stationary part toward the rear end of the transparent plate. It is composed of a moving part whose length can be adjusted, and the auxiliary member is formed integrally with the rear end of the moving part, and moves the moving part toward the front end of the transparent plate, The auxiliary member as well as the movable part are configured so as not to protrude beyond the rear end of the stationary part, and the inner surface of the indicator member has either a light color or a dark color. The inner surface of the auxiliary member has the other characteristic of being bright or dark; and the housing includes a device that receives light reflected from the one edge of the transparent plate when the image of the document is scanned. a photodetector for detecting a change in reflectance, and configured to actuate the copy paper cutting mechanism in response to the photodetector detecting a change in reflectance. An electrostatographic copying apparatus is provided.

DESCRIPTION OF THE PREFERRED EMBODIMENTS Reference will now be made in more detail to the accompanying drawings, in which preferred embodiments of an electrostatographic reproduction apparatus according to the present invention are illustrated.

In the following description, the present invention will be explained in relation to a toner image transfer type electrostatic copying apparatus, but the present invention is not limited to a toner image transfer type electrostatic copying apparatus, and the present invention is not limited to a toner image transfer type electrostatic copying apparatus. It can be similarly applied to electrostatic copying devices of electrolatent image transfer type or direct type.
Furthermore, although the present invention will be described in relation to an electrostatic copying apparatus of the type that scans an image of a document using a document movement method, the present invention also scans an image of a document using an optical system movement method. The present invention can be similarly applied to a type of electrostatic copying apparatus.

First, the overall structure of an example of an electrostatic copying apparatus to which the present invention is applied will be outlined with reference to FIGS. 1 and 2. FIG.

The illustrated electrostatographic reproduction apparatus has a generally rectangular parallelepiped-shaped housing, generally designated by the numeral 2. A document placement mechanism 4 for holding a document to be copied is mounted on the upper surface of the housing 2 in the document scanning direction (i.e., in FIGS.
It is attached so that it can slide freely in the horizontal direction (in the figure). Further, a control panel 6 on which control switches and the like are arranged is arranged on the front side of the housing 2. The document placement mechanism 4 is located at a stop position shown by a solid line in FIG. 1 and a two-dot chain line 4A in FIG. 2 when the electrostatic copying device is not in operation, but when the electrostatic copying device is in operation When carrying out the copying process, the machine first moves from the stop position to the right in FIG. 2 to the scanning movement start position shown by the solid line in FIG. 2, and then from this scanning movement start position to the left in FIG. 2. It is preferable that the scanning movement is carried out to a scanning movement end position indicated by a two-dot chain line 4B in FIG. 2, and then moved back to the right in FIG. 2 to the above-mentioned stop position.

The document placement mechanism 4 for holding an original to be copied will be described with reference to FIG. 3 as well as FIG. It has a support frame 94 which is slidably mounted in the document scanning direction (that is, in the left-right direction in FIG. 1). A transparent plate 96 is fixed to this support frame 94 on which a document to be copied is placed. In addition, the support frame 9
A document holding member 98, preferably made of a flexible material, and a support stand 100 for the document holding member 98 are attached to the upper surface of the document holding member 4. One edge of the document holding member 98 is rotatably attached to the support frame 94 at a position adjacent to one edge of the transparent plate 96, and has a position that covers the transparent plate 96 as shown in FIG. It is adapted to be able to be placed in the raised position shown in FIG. Also, one edge of the support stand 100 is connected to the support frame 9.
4, so that it can be placed in a tilted position as shown in FIG. 1 and in an upright position as shown in FIG.
A gripping piece 102 is provided near the free edge of the outer surface (that is, the upper surface in the state shown in FIG. 1) of the document holding member 98. Such a gripping piece 102
can have one edge thereof engaged with the free edge of the support stand 100 as shown in FIG. Using this, rotate the support stand 1 somewhat counterclockwise as shown in Figure 3.
It is also possible to separate it from the free edge of 00. Therefore, the state as shown in FIG.
is supported by the support frame 94 and is in the lifting position where it stands upright substantially vertically, then the document holding member 98 and the support stand 100 are simultaneously rotated counterclockwise in FIG. 96 and the document placed thereon, or by rotating the gripping piece 102 somewhat counterclockwise in the state shown in FIG. After that, only the document holding member 98 is moved to the third position.
The transparent plate 96 is rotated counterclockwise in the figure.
and cover the original placed on it,
The support stand 100 can also be left in an upright position.

As shown schematically in FIG.
A cylindrical rotating drum 8 having a photosensitive member on at least a portion of its outer circumferential surface is rotatably mounted approximately at the center of the drum. Around the rotating drum 8 which is rotationally driven in the direction of the arrow 10, charging corona dischargers 12 forming photoelectric means for charging the photosensitive member are formed on the photosensitive member, sequentially along the rotational direction of the drum 8. It constitutes a developing means for applying toner to the electrostatic latent image to form a toner image, and in the illustrated example, also constitutes a cleaning means for removing residual toner remaining on the photosensitive member after the transfer process. Developing and cleaning device 1
4. A transfer corona discharger 16 is arranged, which constitutes a transfer means for transferring the toner image formed on the photosensitive member to transfer paper. The development and cleaning device 14 comprises a cylindrical sleeve 18, known per se, with magnets inside, this cylindrical sleeve 1.
It is preferable to have a toner supply device 20 for supplying toner to the sleeve 18, and a receiver 21 for receiving toner falling from the surface of the sleeve 18. On the downstream side of the transfer corona discharger 16 as viewed in the rotational direction of the rotary drum 8, there is further provided a charge eliminating corona discharger 22 for removing residual charges remaining on the photosensitive member after the transfer process.
It is preferable that a static elimination lamp 24 is also provided.

An optical system 26 is disposed above the rotating drum 8 to project an image of the document held by the document placement mechanism 4 onto a photosensitive member. This optical system 26 is
An original irradiation lamp 30 that irradiates the original through an exposure opening 28 formed on the upper surface of the housing 2, a first reflecting mirror 32 for projecting reflected light from the original onto a photosensitive member, an in-mirror lens 34, and a second reflecting lamp. It has a mirror 36 and a third reflecting mirror 38. This optical system 26, as shown by the broken line arrow in FIG.
2 onto the photosensitive member at a position immediately downstream of 2. A cooling blower 40 is provided to the left of the optical system 26, that is, near the left end of the upper part of the housing 2. This blower 40 sucks air from a suction opening 42 formed in the upper part of the left end wall of the housing 2,
This is sent along the guide plate 44 and sent out from the air blowing opening 46 formed adjacent to the exposure opening 28 on the upper surface of the housing 2, so that when the document placement mechanism 4 scans, the transparent Cool the plate (more on this later). Also, at the rear side of the blower 40 (in FIG. 2, behind the blower 40 in the direction perpendicular to the plane of the paper), there is provided a driving source for the blower 40 and various components of the electrostatic copying apparatus. Electric motor 4 constituting the drive source
8 is placed.

The illustrated electrostatographic apparatus further includes the general number 5.
A copy paper transport system indicated by 0 is provided. The copy paper conveyance system 50 includes a roll copy paper supply mechanism 52 for unwinding roll copy paper, and a sheet copy paper supply mechanism 52 for supplying sheet copy paper, either of which is selectively used. It has a mechanism 54. The rolled copy paper supply mechanism 52 includes a curl removing roller 56 that guides the unwound rolled copy paper and corrects its curl, and a pair of rolled copy paper supply rollers 58 that unwinds and sends out the rolled copy paper. A rolled copy paper cutting mechanism 60 is provided downstream of the supply roller pair 58 for cutting the unwound rolled copy paper.
The sheet copy paper supply mechanism 54 has a sheet copy paper insertion opening 62 formed in the right end wall of the housing 2.
and a sheet copy paper receiving plate 64 that receives the sheet copy paper inserted through the insertion opening 62.
and a sheet copy paper supply roller 66 for feeding out the sheet copy paper inserted onto the receiving plate 64.
and a sheet copy paper supply auxiliary member 68 for pressing against a sheet copy paper supply roller 66 inserted on the receiving plate 64. Copy paper conveyance system 50
Further, the copy paper fed out from the sheet copy paper supply mechanism 52 through the guide plate 70 or the copy paper sent out from the sheet copy paper supply mechanism 54 through the guide plate 72 is passed between the pair of guide plates 74 and transferred to a corona for transfer. A pair of transport rollers 76 are used to carry the copy paper into the transfer area where the discharger 16 is arranged, and a pair of conveyor rollers 76 are used to separate the copy paper that has been brought into close contact with the surface of the rotating drum 8 from the rotating drum 8 in the transfer area and carry it out from the transfer area. A pair of separation rollers 78 , a pair of pressure rollers 84 for pressurizing the copy paper fed from the pair of separation rollers 78 through guide plates 80 and 82 and fixing the toner image transferred onto the copy paper under pressure; A pair of conveying rollers 93 is provided for conveying the copy paper from the housing 2 through a pair of guide plates 88 to a receiving tray 92 through a conveying opening 90 formed in the left end wall of the housing 2 . The upstream end 86 of the pair of guide plates 88 has the function of separating the copy paper that is in close contact with the pair of pressure rollers 84 from the pair of pressure rollers 84 .

The illustrated electrostatographic apparatus has a configuration as described above.
The electrostatic copying apparatus according to the present invention does not constitute a new feature, and is substantially the same as the electrostatic copying apparatus described in the specification and drawings of the above-mentioned Japanese Patent Application No. 53-43254. The details of the configuration as described above are left to the specification and drawings of the above-mentioned Japanese Patent Application No. 53-43254, and are omitted in this specification.

Next, mainly referring to FIGS. 4 to 6,
The novel features of the electrostatographic reproduction apparatus according to the present invention will now be described in detail.

In the electrostatic copying apparatus as described above, the rolled copy paper supply mechanism 52 is used instead of the sheet copy paper supply mechanism 54, and therefore, the copy paper feed mechanism 52 is used in place of the sheet copy paper supply mechanism 54. In synchronization with the positioning mechanism 4 starting the scanning movement from the scanning movement start position shown by the solid line in FIG. 2 to the left in FIG. ), when the rolled copy paper is sent out from the cutting position C (FIG. 2) of the rolled copy paper cutting mechanism 60 at substantially the same speed as the scanning movement speed of the document placement mechanism 4, the length of the document is When the rolled copy paper is fed out by a desired length, such as a length corresponding to the length of the paper or a predetermined standard length, the rolled copy paper cutting mechanism 60 is activated to cut the rolled copy paper to the desired length. It is important to cut the

Therefore, in the illustrated electrostatic copying apparatus, in order to operate the rolled copy paper cutting mechanism 60 at a desired time and cut the rolled copy paper to a desired length, the following steps are performed. A cutting mechanism drive control device of the configuration is provided.

To explain with reference to FIG. 4, the document placement mechanism 4
(i.e., when the document pressing member 98 is brought into a state of covering the transparent plate 96 and the original placed thereon as shown in FIG. 96 and the surface facing the original (in the illustrated example, the lower part in FIG. 4) 39
0 has dark color characteristics. That is, the document holding member 98
At least a portion 390 of the inner surface of the sensor is colored a dark color, such as black, which is perceived as dark by a photodetector when light reflected therefrom is projected onto a photodetector, which will be described below. It is important that the dark-colored portion 390 of the inner surface of the document holding member 98 includes at least a region of a predetermined width corresponding to one edge of the transparent plate 96; In this case, an area of width X corresponding to one edge of the transparent plate 96 (the edge located above and having width Y in FIG. 5) and an area below this area in FIG. 4 are darkened. It is being The area below the width X area corresponds to the surface of the support frame 94 outside the edge of the transparent plate 96, and corresponds to the document irradiation lamp 30 of the optical system 26 (FIG. 2).
Since this is an area that is not irradiated by the light, it does not necessarily have to be dark in color and may be any color. On the other hand, the portion of the transparent plate 94 above the area of width X that corresponds to the main portion other than the above-mentioned one edge is brightly colored, as is the case with the inner surface of the document holding member in the conventional electrostatic copying device. It is preferable that the photosensitive member has a bright color such as white so that when the reflected light is projected onto the photosensitive member on the rotating drum 8, the photosensitive member perceives it as a bright area.

Referring to FIG. 5 (and FIG. 6) as well as FIG. 4, a copy paper cutting length indicating member 396 is disposed adjacent to the transparent plate 96. It is important that this copy paper cutting length indicating member 396 extends along one edge of the transparent plate 96 from the tip to the rear end, and that its length from the tip of the transparent plate 96 is adjustable. In the specific example shown, the copy paper cutting length indicating member 396 is located adjacent to the inner surface of the transparent plate 96 (i.e., the surface opposite to the surface on which the original is placed) and is attached to the support frame 94 of the document placement mechanism 4. The stationary part 398, which has a stationary part 398 and a moving part 400 provided therein, is fixed to the transparent plate 96 by, for example, being bonded to the inner surface of the transparent plate 96, and a part of it is fixed to the transparent plate 96. It extends along one edge of the transparent plate 96 with a width Y and a length L from the tip of the transparent plate 96. Although the remaining portion of the stationary portion 398 protrudes beyond the tip and one edge of the transparent plate 96, this portion may be omitted. Similar to the stationary section 398, the moving section 400 has a portion extending with a width Y along one edge of the transparent plate 96.
6 in the scanning direction, that is, in the direction indicated by arrow 402. At least the portions of the inner surfaces of the stationary portion 398 and the moving portion 400 (that is, the surfaces exposed to the optical system 26) extending along one edge of the transparent plate 96 are made to have a bright color such as white. It has bright color characteristics. Moving part 40
The ends of the transmission wire 404 are connected to the front and rear ends of the transmission wire 404, respectively. The transmission wire 404 passes from the end connected to the rear end of the moving unit 400 to a guide roller 406 rotatably mounted within the support frame 94 of the document placement mechanism 4, and then passes through a manual operation member 408.
Guide rollers 412 and 41 are wound once around the small diameter portion 410 of
4 to an end connected to the front end of the moving section 400. The transmission wire 404 has a portion constituted by a tension spring 146, which is maintained under the required tension by the action of the tension spring 416. A manual operation member 408 rotatably attached to the support frame 94 of the document placement mechanism 4 is formed integrally with the small diameter portion 410 and a portion thereof protrudes through an opening formed in the support frame 94. It also has a large diameter section 418 (see also FIG. 4). Therefore, by operating the large diameter portion 418 of the manual operating member 408 from outside the support frame 94, the manual operating member 408 can be rotated. When the manual operating member 408 is rotated, the transmission wire 404 wound around its small diameter portion is moved, and the moving portion 400 is therefore slid in the direction indicated by the arrow 402. By operating the manual operation member 408, the moving section 400 can be moved to the leftmost position where its rear end is aligned with or ahead of the rear end of the stationary section 398, and its rear end is aligned with the rear end of the transparent plate 96. It can be freely adjusted to any position between alignment and the rightmost position located behind it. On the outer surface, that is, the top surface of the moving section 400, there is a symbol (for example, the _fifth B ₄ shown in the figure,
It is preferable that a symbol such as A ₄ or B ₅ be attached. The symbols B ₄ , A ₄ , B ₅ illustrated in FIG. 5 indicate the corresponding length of the length L ₁ described above when it is aligned with the rear end of the stop 398.
Therefore, when the moving part 400 is placed in the position shown in FIG. 5 and the symbol B ₄ is aligned with the rear end of the stationary part 398, the above length L ₁ becomes the length of B ₄ . . Instead of attaching the above symbol to the outer surface of the moving part 400, or in addition to this,
A symbol indicating the length from the tip of the transparent plate 96 may be attached to a portion of the upper surface of the support frame 94 adjacent to the above-mentioned one edge of the transparent plate 96, or a symbol indicating the length from the tip of the transparent plate 96 may be attached.
A symbol indicating the relationship between the length L ₁ from the tip of the transparent plate 96 to the rear end of the moving part 400 and the angular position of the manual operation member 408 can also be attached to the large diameter portion 418 of 08.

According to the present invention, an auxiliary member 502 that can be positioned at the rear end of the above-mentioned indicator member 396 is further arranged adjacent to the transparent plate 96. In the illustrated example, the auxiliary member 502 has a portion extending with a width Y along one edge of the transparent plate 96, similar to the moving part 400 of the indicating member 396, The pointing member 396 is attached to the stationary part 398 so as to be movable in the scanning direction, that is, the direction indicated by the arrow 504, separately and independently from the moving part 400. At least a portion of the inner surface of the auxiliary member 502 (that is, the surface exposed to the optical system 26) extending along one edge of the transparent plate 96 is colored in a dark color, such as black, to exhibit dark color characteristics. have And auxiliary member 502
The ends of a transmission wire 506 are connected to the front and rear ends of the transmission wire 506, respectively. This transmission wire 506 is
Similar to the above transmission wire 404 connected to the moving part 400 of the instruction member 396, the auxiliary member 50
2, passes through a guide roller 508 rotatably mounted within the support frame 94 of the document placement mechanism 4, and then wraps once around the small diameter portion 512 of the manual operation member 510. and further extends to an end connected to the front end of the auxiliary member 502 through guide rollers 514 and 516 rotatably mounted within the support frame 94 in the same manner as the guide roller 508 described above. The transmission wire 507 has a part constituted by a tension spring 518, by the action of which it is maintained under the required tension. A manual operation member 510 rotatably mounted on the support frame 94 of the document placement mechanism 4 is formed integrally with the small diameter portion 512 and a portion thereof protrudes through an opening formed in the support frame 64. It also has a large diameter section 520 (see also FIG. 4). Therefore, by operating the large diameter portion 520 of the manual operating member 510 from outside the support frame 94, the manual operating member 510 can be rotated. When the manual operating member 510 is rotated, the transmission wire 506 wound around its small diameter portion is moved, and the auxiliary member 502 is therefore slid in the direction shown by the arrow 504 and positioned at an appropriate position.

In the illustrated electrostatic copying apparatus, the one edge of the transparent plate 96 corresponds to the one edge of the rotating drum 8 where no photosensitive member is present, and the document placement mechanism 4
The document on the optical system 26 is moved relative to the optical system 26 (in the specific example shown, the relative movement between the two is accomplished by the movement of the document placement mechanism 4). When the light from the irradiation lamp 30 scans the transparent plate 96 or the document placed thereon, the light reflected at the one edge of the transparent plate 96 is projected toward the part of the rotating drum 8. It's getting old.

In the optical path of the reflected light at the one edge of the transparent plate 96, there is a photodetector 394 (see FIG. ) is important. This photodetector 394, which can be constructed from elements known per se, such as a phototransistor or a photocell, is in the optical path of the reflected light from the edge of the transparent plate 96 to the part of the rotating drum 8. Although it can be placed at any arbitrary position, it is preferable to place it as far away from the in-mirror lens 34 of the optical system 26 as possible, that is, near the rotating drum 8 or near the transparent plate 96. This is because the reflected light converges as it approaches the in-mirror lens 34 and spreads as it moves away from the in-mirror lens 34. This is because the light receiving width of the photodetector 394 can be increased by arranging it. In the illustrated example, as is clear from FIG. 2, a photodetector 394 is placed near the rotating drum 8.

Next, copy paper cutting length indicating member 3 as described above
96, the effects of the cutting mechanism drive control device including the auxiliary member 502 and the photodetector 394 will be explained.

First, if it is desired to cut the copy paper into a length corresponding to the length of the original to be copied, move the copy paper cutting length indicating member 396 by moving the copy paper 40
0 at an appropriate position where the rear edge does not exceed the rear edge of the copy paper (for example, the leftmost position where the rear edge of the moving part 400 is aligned with or forward of the rear edge of the stationary part 398), and The rear end of the auxiliary member 502 does not exceed the rear end of the moving unit 400, so that the inner surface of the auxiliary member 502, which has a dark color characteristic, is not exposed to the optical system 26 (FIG. 2). In this state, the original is placed on the transparent plate 96 of the original placing mechanism 4. At this time, as in normal copying operations, place the leading edge of the document on the transparent plate 96.
(i.e., the transparent plate 9 in FIGS. 4 and 5)
6) (or protrudes beyond it), and one edge of the document is aligned with the one edge of the transparent plate 96 (i.e., the edge having the upper width Y in FIG. 5). It is important to place the original on the transparent plate 96. Thereafter, the document pressing member 98 is brought into the state shown in FIG. 1, that is, the state in which it covers the transparent plate 96 and the document placed thereon. In general, most of the originals to be copied have one edge that is substantially a blank space and is a light color such as white. Therefore, the document and the document holding member 9
When optical system 8 is brought into the state as described above, optical system 2
6 (FIG. 2), at the one edge of the transparent plate 96, from the tip of the transparent plate 96 to the rear end of the copy paper cutting length indicating member 396 (that is, the rear end of the stationary part 398). Stationary part 3 with bright color characteristics in the range
98 is exposed, and the light color of one edge of the document, which is essentially a margin, is exposed in the range from the rear end of the copy paper cutting length indicating member 396 to the rear end of the document, and therefore the transparent plate A bright color is continuously exposed in the range from the leading edge of the document 96 to the trailing edge of the document. On the other hand, in the range behind the rear end of the document, the dark color of the width X region of the portion 390 having the dark coloring property of the document holding member 98 is exposed to the optical system 26 . Therefore, the reflectance changes significantly at the trailing edge of the document. Therefore, when the document image is scanned by relatively moving the document placement mechanism 4 and the optical system 26 (in the illustrated example, by scanning the document placement mechanism 4), the transparent plate 96 Bright colored reflected light is projected onto the photodetector 394 in the range from the leading edge of the original to the rear edge of the original, but dark reflected light is projected onto the photodetector 394 beyond the trailing edge of the original. When scanning the rear end of the photodetector 394
detects a significant change in reflectance at the trailing edge of the document.

The photodetector 394 is connected to a suitable electric circuit, and when it detects a change in reflectance at the edge of the transparent plate 96, it generates a signal, and the rolled copy paper cutting mechanism 60 is activated in response to this signal. I am forced to do it. As the electric circuit to which the photodetector 394 is connected, the electric circuit shown in FIG. 20 of the above-mentioned Japanese Patent Application No. 53-43254 can be used. As a cutting mechanism actuator for the purpose of
A cutting mechanism actuator including a solenoid as illustrated in FIG. 15 of No. 43,254 may be used. As mentioned above, since the rolled copy paper cutting mechanism 60 is operated in synchronization with the scanning of the trailing edge of the document, it is operated in synchronization with the scanning of the image of the document placed on the transparent plate 96 of the document placement mechanism 4. The copy paper fed out from the cutting position C (FIG. 2) of the rolled copy paper cutting mechanism 60 at the same speed as the scanning speed is cut into a length that is substantially the same as the length of the original document.

Thus, in an electrostatic copying apparatus equipped with the drive control device as described above, the document placement mechanism 4 is simply
By simply placing the original on the transparent plate 96 in a predetermined manner and covering the transparent plate 96 and the original placed thereon with the original holding member 98, no other specific operations are required. The rolled copy paper can be automatically cut to a length corresponding to the length of the original document without having to do so.

By the way, if the length of the original is smaller than the minimum length of the copy paper cutting length indicating member from the tip of the transparent plate 96, that is, the length L from the tip of the transparent plate 96 to the rear end of the stationary part 398, Even if the movable section 400 of the copy paper cutting length indicating member 396 is placed at its leftmost position (i.e., the position where its rear end is aligned with or ahead of the rear end of the stationary section 398), the above-mentioned position of the transparent plate 96 At one edge, a bright color is always exposed to the optical system 26 in a length L range from the tip of the transparent plate 96 to the rear end of the stationary part 398. Therefore, it is impossible to cut the copy paper into a length shorter than the length L mentioned above. On the other hand, the copy paper supplied from the rolled copy paper supply mechanism 52 is generally conveyed by a pair of rollers 76, 78, etc. arranged at an appropriate interval, as shown in FIG. carried out. In such a case, if the copy paper is shorter than the distance between the pair of rollers, it will not be possible to convey the copy paper; It is necessary to cut the copy paper. Therefore, the above length L
If the copy paper is cut to a length that is the same as or slightly larger than the minimum copy paper cutting length specified by the length between the roller pair, and the copy paper is cut to a length that can be transported, the copy paper cannot be copied. It is preferable to make it possible to reliably prevent problems in paper conveyance.

Next, if it is desired to cut the original to a predetermined length such as a standard length without depending on the length of the original to be copied, although it is extremely rare, one edge of the original to be copied is dark colored. A case will be described in which it is desired to arrange one edge of the document to be copied at the center of the transparent plate 96 without aligning it with the one edge of the transparent plate 96. In such a case, after or before placing the original to be copied on the transparent plate 96, the manual operation member 408 is operated to adjust the length from the tip of the transparent plate 96 to the rear end of the moving unit 400. The moving unit 400 is positioned so that the length _L1 becomes a desired copy paper cutting length, such as a standard length or a length corresponding to the length of the original to be copied. The auxiliary member 502 may be positioned at any position, except as detailed below. Next, the document pressing member 98 is brought into a state of covering the transparent plate 96 and the document placed thereon. Thus, optical system 2
6 (FIG. 2), at the one edge of the transparent plate 96, the moving part 400 extends from the tip of the transparent plate 96.
In the range of the above-mentioned length L ₁ to the rear end, the stationary part 398 and the moving part 4 of the copy paper cutting length indicating member 396
00's inner bright color is exposed. On the other hand, behind the rear end of the moving unit 400, the width
(If the length of the document is smaller than the above length _L1 , or if one edge of the document is placed offset from the one edge of the transparent plate 96, the dark color of the area of the transparent plate 96 is exposed. (If there is no original at the edge)
Or, one dark edge of the document is exposed (the length of the document is greater than the length L ₁ above, one edge of the document is dark, and one edge of the document is exposed by the transparent plate 96). (as shown in FIGS. 5 and 6), or the dark-colored inner surface of the auxiliary member 502 is exposed (as shown in FIGS. (when the pointing member 396 is positioned at the rear end of the moving part 400). Therefore, copy paper cutting length indicating member 3
The reflectance changes significantly at the rear end of the moving part 96, that is, at the rear end of the moving part 400. Therefore, when scanning is performed by relatively moving the document placement mechanism 4 and the optical system 26, when scanning the rear end of the moving unit 400, the photodetector 394 detects a significant reflectance at the rear end of the moving unit 400. When this change is detected, the rolled copy paper cutting mechanism 60 is activated, and the copy paper is thus cut into the desired copy paper cutting length _L1 .

Thus, the length L ₁ (i.e.,
When cutting a copy paper to a length L ₁ ) from the tip of the transparent plate 96 to the rear end of the indicator member 396, the length of the document is greater than the length L ₁ above, and one edge of the document is almost cut. As in the case of , the document is substantially a blank space and has a light color such as white, and one edge of the document is placed on the transparent plate 96 with one edge aligned with the one edge of the transparent plate 96. When desired, auxiliary member 502 performs an important function.

To elaborate on this point, the above patent application filed in 1973-
If the auxiliary member 502 is not provided, such as in the cutting mechanism drive control device described in the specification and drawings of No. 43254, the length of the document is the above-mentioned length.
When L ₁ is larger than L 1 and one edge of the original is light-colored, one edge of the original cannot be aligned with the one edge of the transparent plate 96 as in the case of a normal copying operation. When one edge of the document is aligned with the one edge of the transparent plate 96 and placed on the transparent plate 96, the transparent plate 96 is placed on the optical system 26 (FIG. 2).
At the one edge of the indicator member 396, the inner surface of the indicator member 396 having a bright color characteristic is exposed within a length L ₁ from the tip of the transparent plate 96 to the rear end of the indicator member 396, that is, the rear end of the moving unit 400. In addition, even in the range from the rear end of the pointing member 396 to the rear end of the document, the bright color of one edge of the document, which is essentially a blank space, is exposed, and the width of the dark-colored portion 390 of the document holding member 98 is exposed. The bright color characteristic continues up to the area behind the trailing edge of the document where the region X is exposed. Therefore, when scanning the image of the document, the photodetector 394 detects a change in reflectance only at the trailing edge of the document, and therefore, the roll of copy paper is at the position set by the indicator 396. The cut is not the above length L ₁ (this length L ₁ is smaller than the length of the document), but is cut to a length corresponding to the length of the document.

However, according to the cutting mechanism drive control device as described above in which the auxiliary member 502 is provided according to the present invention, in the above-described situation, the auxiliary member 502 can be operated by operating the manual operation member 510. Fifth
As shown in the drawings and FIG. be forced to do something. Thus, the optical system 26 (Fig. 3)
On the other hand, at the one edge of the transparent plate 96,
Moving part 4 of instruction member 396 from the tip of transparent plate 96
In the range of the length L ₁ up to the rear end of 00, the bright color of the inner surface of the stationary part 398 of the pointing member 396 and the moving part 400 is exposed, and in the range of the pointing member 396 continuing to the rear end of the moving part 400, Regardless of the characteristics of one edge of the document and the manner in which the document is placed, the dark color of the inner surface of the auxiliary member 502 is always exposed. Therefore,
The reflectance always changes significantly at the rear end of the pointing member 396, and therefore, when scanning an image of a document, the photodetector 394 detects a significant change in the reflectance at the rear end of the pointing member 396. The change is detected and the rolled copy paper cutting mechanism 60 is activated, thus cutting the copy paper into the desired copy paper cutting length _L1 .

In addition, in the illustrated specific example, the auxiliary member 502
The stationary part 398 and the moving part 40 of the pointing member 396
0, but could be slidably disposed above stationary portion 398 in the direction of arrow 504 if desired.

FIG. 7 shows a modified example of the copy paper cutting length indicating member and the auxiliary member. In the specific example shown in FIG. 7, FIG.
0' is disposed above the stationary portion 398' so as to be slidable in the direction indicated by the arrow 402'. Second, the auxiliary member 502' is the moving part 4 of the pointing member.
By operating a suitable manual operation member (not shown, but may be similar to manual operation member 408 or 510 shown in FIG. 5) integrally formed at the rear end of 00', It is designed to be slid together with the moving part 400' in the direction shown by an arrow 402' via a transmission wire 404'.

In the specific example shown in FIG. 7, if it is desired to cut the copy paper into a length corresponding to the length of the original to be copied, the moving section 400' and the auxiliary member 502' integrated therewith are used. It is moved sufficiently to the left in FIG. 7 to prevent the rear end of the auxiliary member 502' from protruding beyond the rear end of the stationary part 398'. Then, place the original on the transparent plate 96' as required (that is, place one edge of the original on the transparent plate 96').
6') and then cover the transparent plate 96' and the original placed thereon with a document pressing plate. Thus, as in the case of the embodiment illustrated in _FIG . It is easily understood that the copy paper is cut to a desired length that is equal to or longer than the length of the copy paper and corresponds to the length of the original document.

On the other hand, when it is desired to cut the original to a predetermined length such as a standard length regardless of the length of the original to be copied, when one edge of the original to be copied is dark, or when the original to be copied is Transparent plate 9 without aligning one edge of the document with one edge of transparent plate 96'.
6', after or before placing the original to be copied on the transparent plate 96', from the tip of the transparent plate 96' to the back of the moving part 400'. The moving unit 40 cuts the copy paper so that the length L ₁ ' to the end becomes a desired copy paper cutting length, such as a standard length or a length corresponding to the length of the original to be copied.
0' and the auxiliary member 502' integrated therewith are positioned. Thus, with respect to the optical system 26 (FIG. 2), at the one edge of the transparent plate 96', the length L from the tip of the transparent plate 96' to the rear end of the moving part 400' of the indicating member In the range ₁ ', the bright color of the inner surfaces of the stationary part 398' and the moving part 400' of the indicator member is exposed, and in the range following the rear end of the moving part 400', the characteristics of one edge of the document and the characteristics of the original are exposed. Regardless of the mounting style, the dark color of the inner surface of the auxiliary member 502' is always exposed. Therefore, it is unnecessary to explain in further detail that the roll of copy paper is cut to a desired copy paper cutting length.
It will be clear that it is cut to L ₁ '.

In addition, the specific examples shown in FIGS. 4 to 6 or the seventh
In the specific example shown in the figure, at least a portion of the inner surface of the document holding member 98 is painted in a dark color such as black, but this can be omitted if desired. However, if this is omitted, even if it is desired to cut the copy paper to a length that corresponds to the length of the original, the cut length of the copy paper will always be used unless one edge of the original to be copied is dark colored. Cut the copy paper to length L ₁ or
It is necessary to define L ₁ ', simply place the original to be copied on the transparent plate 96 or 96' as specified and press the original holding member 98 on the transparent plate 96 or 96'.
It is not possible to automatically cut the copy paper into a length corresponding to the length of the original only by covering 6' and the original placed thereon.

In particular, when it is omitted to make at least a part of the inner surface of the document holding member 98 a dark color such as black, the stationary portion 398 or 39 of the indicating member may be omitted.
8' and the inner surface of the moving part 400 or 400' are colored dark instead of bright, and the auxiliary member 502 or 50
It is also possible to make the inner surface of 2' a light color instead of a dark color. In this case, the optical system 26 (second
In contrast to the above-mentioned one edge of the transparent plate 96 or 96', the range of length L ₁ or L ₁ ' from the tip of the transparent plate 96 or 96' to the rear end of the moving part 400 or 400' Then, the stationary part 398 or 3 of the indicating member
98 and the moving part 400 or 400' are exposed, and the light color of the auxiliary member 502 or 502' is exposed in the area following the rear end of the moving part 400 or 400'. Therefore, when scanning the image of the original document, the photodetector 394 is moved by the moving part 400 or 40 of the pointing member.
At the rear end of 0', instead of a change from bright to dark, a noticeable change in reflectance from dark to bright is detected. Therefore, the copy paper can be cut to the desired copy paper cutting length L ₁ or L ₁ ' set by the indicating member.

Furthermore, although in the illustrated embodiment only one photodetector is provided, two or more photodetectors are provided spaced apart in the scanning direction and all of these photodetectors are simultaneously activated. It is also possible to operate the rolled copy paper cutting mechanism 60 upon receiving reflected light whose color changes from bright to dark (or from dark to bright). Thus,
Even if there is a locally dark (or light) part on the flat edge of the document to be copied or on the inner surface of the indicator or auxiliary member, the length of this dark (or light) part in the scanning direction is Reflection at the rear edge of the document or at the boundary area between the inner surface of the indicator member and the auxiliary member, as long as the distance is smaller than the distance between the frontmost photodetector and the rearmost photodetector in the direction. The roll cutting mechanism 60 can be actuated only in response to a change in reflectance, ie, only when the rearmost photodetector in the scanning direction detects a desired change in reflectance.

[Brief explanation of the drawing]

FIG. 1 is a perspective view showing a preferred embodiment of an electrostatographic copying apparatus according to the present invention. FIG. 2 is a simplified sectional view of the electrostatic copying apparatus shown in FIG. 1. FIG. 3 is a perspective view showing a document placement mechanism in the electrostatic copying apparatus shown in FIG. 1. FIGS. 4 and 5 are a perspective view and a plan view, respectively, of a document placement mechanism for explaining a drive control device for a rolled copy paper cutting mechanism in the electrostatic copying apparatus shown in FIG. 1. FIG. 6 is a simplified perspective view showing the configuration of a copy paper cutting length indicating member and an auxiliary member. 7th
The figure is a simplified perspective view showing the structure of a modified example of a copy paper cutting length indicating member and an auxiliary member. 2...Housing, 4...Document placement mechanism, 26
...Optical system, 50... Copy paper transport system, 52... Roll copy paper supply mechanism, 60... Roll copy paper cutting mechanism, 96 and 96'... Transparent plate, 98...
Document holding member, 394...Photodetector, 396...
Copy paper cutting length indicating member, 398 and 398'...
...Stationary part, 400 and 400'...Moving part, 40
4,404' and 506...transmission wire, 410
and 512...manual operation member, 502 and 50
2'...Auxiliary member.

Claims (1)

[Scope of Claims] 1. A housing; having a transparent plate for placing a document to be copied and a document holding member for covering the document placed on the transparent plate, and mounted on the housing; a document placing mechanism; an optical system for projecting an image of the document placed on the transparent plate;
a copy image forming means disposed within the housing; for transporting copy paper in synchronization with scanning of the image of the original document performed by relative movement of the original document placement mechanism and the optical system; , an electrostatic copying apparatus comprising a copy paper feeding mechanism that unwinds a copy paper roll, and a copy paper conveyance system including a copy paper cutting mechanism; a copy paper cutting length indicating member extending along one edge of the transparent plate toward the rear end with a predetermined width and whose length from the tip of the transparent plate is adjustable; The transparent plate extends along one edge with a predetermined width, is mounted to be movable along the one edge of the transparent plate separately from the indicating member, and is selectively positioned at the rear end of the indicating member. an auxiliary member capable of coloring is disposed, the inner surface of the indicating member has the characteristic of either light color or dark color, and the inner surface of the auxiliary member has the characteristic of the other of light color or dark color; and A photodetector is provided in the housing for detecting a change in reflectance by receiving reflected light from one edge of the transparent plate when the image of the document is scanned. An electrostatic copying apparatus characterized in that, when a photodetector detects a change in the reflectance, the copy paper cutting mechanism is activated in response. 2. The electrostatic copying apparatus according to claim 1, wherein the indicating member and the auxiliary member are provided adjacent to the inner surface of the transparent plate. 3. The inner surface of the indicating member has a light color characteristic, the inner surface of the auxiliary member has a dark color characteristic, and the inner surface of the document holding member has a predetermined width corresponding to at least one edge of the transparent plate. 3. The electrostatic copying apparatus according to claim 1, wherein the portion has a dark color characteristic. 4. The indicating member includes a stationary portion extending from the tip of the transparent plate toward the rear end of the transparent plate by the minimum copy paper cutting length, and is movably mounted along the one edge of the transparent plate. Claim 1 comprising a moving part that can adjust the length of the stationary part protruding from the rear end of the stationary part toward the rear end of the transparent plate.
The electrostatic copying apparatus according to any one of items 1 to 3. 5. Both ends of a transmission wire are connected to both ends of the moving portion of the indicating member, and a manual operation member is connected to the transmission wire, and by operating the manual operation member, the transmission wire is 5. The electrostatic copying apparatus according to claim 4, wherein the moving section is configured to be able to be moved appropriately via the electrostatic copying apparatus. 6. Both ends of a transmission wire are connected to both ends of the auxiliary member, and a manual operation member is connected to the transmission wire, and by operating the manual operation part, the transmission wire is connected to the transmission wire. An electrostatic copying apparatus according to any one of claims 1 to 5, which is configured so that the auxiliary member can be moved as appropriate. 7. A housing; a document placement mechanism mounted on the housing and having a transparent plate for placing a document to be copied and a document holding member for covering the document placed on the transparent plate; ; including an optical system for projecting an image of the original placed on the transparent plate;
a copy image forming means disposed within the housing; for transporting copy paper in synchronization with scanning of the image of the original document performed by relative movement of the original document placement mechanism and the optical system; , an electrostatic copying apparatus comprising a copy paper feeding mechanism for unwinding a roll copy paper and a copy paper transport system including a roll copy paper cutting mechanism; adjacent to the transparent plate, a piece of the transparent plate; a copy paper cutting length indicating member extending along the edge with a predetermined width;
An auxiliary member extending a predetermined width along one edge of the transparent plate is disposed, and the indicating member extends from the tip of the transparent plate to the rear end of the transparent plate by the minimum copy paper cutting length. a stationary part that extends toward the stationary part; and a stationary part that is mounted above the stationary part so as to be movable along the one edge of the transparent plate, and protrudes from the rear end of the stationary part toward the rear end of the transparent plate. It is composed of a moving section whose length can be adjusted, and the auxiliary member is formed integrally with the rear end of the moving section, and moves the moving section toward the distal end of the transparent plate. The auxiliary member as well as the moving part is configured so that it does not protrude beyond the rear end of the stationary part, and the inner surface of the indicating member has either a light color or a dark color. , the inner surface of the auxiliary member has the other characteristic of light color or dark color; and the inside of the housing receives light reflected from the one edge of the transparent plate when the image of the document is scanned. A photodetector is provided for detecting a change in reflectance, and when the photodetector detects a change in reflectance, the copy paper cutting mechanism is actuated in response. An electrostatic copying device characterized by: 8. The electrostatic copying apparatus according to claim 7, wherein the indicating member and the auxiliary member are provided adjacent to the inner surface of the transparent plate. 9. The inner surface of the indicating member has a light color characteristic, the inner surface of the auxiliary member has a dark color characteristic, and the inner surface of the document holding member has a predetermined width corresponding to at least one edge of the transparent plate. 9. The electrostatic copying apparatus according to claim 7, wherein the portion has a dark color characteristic. 10 Both ends of a transmission wire are connected to the tip of the moving part of the indicating member and the rear end of the auxiliary member that is integrally formed with the rear end of the moving part, and the transmission wire is connected to a manual Claims in which an operating member is connected, and the moving part and the auxiliary member can be moved appropriately via the transmission wire by operating the manual operating member. The electrostatic copying apparatus according to any one of items 7 to 9.