JPH046033Y2 - - Google Patents

Description

[Detailed Description of the Invention] Technical Field: The present invention relates to a copying machine, and particularly to a copying machine capable of transferring a toner image even to a transfer paper having a width sufficiently wider than the width of a photoreceptor drum of a transfer system.

Prior Art: As shown in FIGS. 1 and 2, a copying machine generally includes a charging system 101 and an exposure system 102 for forming an electrostatic latent image corresponding to an original image on a photosensitive drum 100; a developing system 10 for developing the latent image on the body drum 100 with toner and making it visible;
3; Transfer system 10 that transfers this toner image to transfer paper
4; Fixing system 105 for fixing the transferred toner image on the transfer paper; Paper feeding system 106 for supplying the transfer paper from outside into the system;
A conveying system 108 that conveys the image to a copy ejection system 107 via a transfer system 104 and a fixing system 105 is provided, and these are housed in a housing 109 . The conveyance path 110 of the conveyance system 108 is connected to the photosensitive drum 10.
It is made to have approximately the same width as the drum width of 0. Moreover, the path width is defined by a stopper 114 made of a spring material or the like used for a pair of conveying rollers 111, a pair of fixing rollers 112, a pair of paper ejecting rollers 113, etc., which are arranged across this conveying path 110. At the same time, the widthwise end of the conveyance path 110 is partially blocked in the traveling direction by the metal fitting 114 or the like. Therefore, in accordance with a photoreceptor drum having a predetermined standard width, only transfer paper having a width equal to or narrower than the photoreceptor drum can be applied to conventional copying machines. In other words, transfer paper that is much wider than the effective width of the photoreceptor drum (the length in the axial direction in which an electrostatic latent image can be formed on the photoreceptor drum), for example, the maximum width is A-4.
It is impossible to convey a transfer paper having a width of A-3 to a photoreceptor drum of this size.

On the other hand, if a desired image can be directly copied not only onto a sheet of transfer paper but also onto a page of a bound article such as a notebook, the efficiency of transcription work can be significantly improved.

Purpose of the invention: The purpose of the invention is to enable paper of any size to be used regardless of the effective width of the photoreceptor drum;
The object of the present invention is to provide a copying machine capable of copying a desired image. Another object of the present invention is to provide a copying machine in which a desired image can be copied onto a page of a bound document such as a notebook by inserting the page into a conveyance path.

Summary of the invention: In the copying machine of the invention, the path width of the transfer paper transport system in the paper feeding system, transfer system, and fixing system is sufficiently larger than the effective width of the photoreceptor drum in the transfer system over almost the entire area in the traveling direction. At least one side edge in the width direction of the transfer paper conveyance system is open to the outside of the machine over the entire area in the traveling direction so that a part of the transfer paper conveyed through the transfer paper conveyance system protrudes. The above objectives are thereby achieved.

Example: The present invention will be described below with reference to embodiments.

As shown in FIGS. 8 to 6, the copying machine of the present invention includes a charging system 3 and an exposure system 4 for forming an electrostatic latent image on a photoreceptor drum 2 according to the original image of a document 1; A developing system 5 for developing the latent image on the photosensitive drum 2 with toner and making it visible; a transfer system 6 for transferring this toner image onto a transfer paper; a fixing system for fixing the transferred toner image on the transfer paper system 7; a paper feed system 8 for replenishing transfer paper from the outside into the system; and a transport system 10 for transporting the transfer paper via the paper feed system 8, transfer system 6, and fixing system 7 to a copy ejection system 9. There is.

Among these systems, the transport system 10 including at least the paper feed system 8, the transfer system 6, and the fixing system 7 has at least one side end 11 in its width direction open to the outside of the machine over the entire area in the traveling direction.

More specifically, the front plate 16 is located at the upper plate 161 at the alignment position with the conveyance path 12 of the conveyance system 10.
and a lower plate 162. This front side plate 16 mainly supports and fixes the photosensitive drum 2, various pairs of rollers 13, 14, 15, etc. via its bearings. The transport roller pair 13, the fixing roller pair 14, and the paper discharge roller pair 15 arranged in the transport path 12 are all arranged such that upper and lower rollers are independently arranged on the open end 11 side of the transport system 10. For example, as shown in FIGS. 7a and 7b, at least one of the rollers, for example, the upper roller 131 on the variable side, is moved downward from above via a bearing 133 by a spring member 132 at at least one end of the pair of conveying rollers 13. It is constantly energized and presses the lower roller 134 on the fixed side. The spring member 132 is connected to the upper plate 161 of the front side plate 16.
, so it does not obstruct the opening of the open end 11 of the transport system. Variable side bearing 1
33 is a guide hole 160 in the upper plate 161 that supports this
You can move up and down within it. Regarding the fixing roller 14, similarly, as shown in FIG. 8, for example, a lower roller 141 on the variable side is constantly urged upward by a spring member 142 from its lower side via a bearing 143, and the upper roller 141 on the fixed side is The roller 144 is pressed. In addition to the heat roller pair 14 described above, the fixing system 7 may also employ fixing means that do not require a biasing means, such as flash fixing, open fixing, and induction heating fixing.

In the vicinity of the open end 11 of the conveyance system, there is a slide support base 1 of an appropriate width extending substantially over the entire area in the direction of movement of the conveyance system.
7 can be placed. A copy paper placement plate 18 is arranged on this support stand 17. Copy paper mounting plate 18
can slide on the support stand 17 along the guide groove 170 in synchronization with the driving of the conveyance system 10 with the copy paper placed thereon. This copy paper mounting plate 18, together with its support stand 17, supports the part of the copy paper that protrudes from the conveyance path 12 to the outside of the system, and conveys it in synchronization with the conveyance system 10, and reduces the width of the conveyance path 12. It is substantially enlarged and functions as an auxiliary conveyance path.

Although it is important that the reciprocating movement of the copy paper placement plate 18 is synchronized with the conveyance system 10, its function does not have to be special, and any known function may be employed. For example, as shown in FIG.
It is connected to a wire 21 wound around the wires 9 and 20 and moves as the wire 21 runs. The drive pulley 19 is a drive means 22 such as a forward/reverse motor.
It is driven in synchronization with the conveyance speed of the conveyance system 10. This pulley 19 can also be directly connected and synchronized with the conveying system driving means of the main body of the copying machine.

In addition, in order to prevent light from the outside from entering each area of the charging system 3, exposure system 4, and development system 5,
A light shielding film 23 may be appropriately disposed below the drum 2 as necessary.

Copying can be performed using the copying machine of the present invention as follows: When copying a single page of non-standard sheet copy paper or a bound item such as a notebook, turn on the main power supply 30 of the copying machine. After that, a desired copy paper 40 or a page 50 of a notebook is inserted from the manual feeding table 81 of the paper feed system 8, and the portion protruding to the outside is fixed to the copy paper mounting table 18 with a clip 181. Next, after checking the presence or absence of paper feeding with the copy paper detection switch 31, turning on the copy switch 32,
The transport system 10 is driven. At the same time, the mounting plate 18 slides on the support base 17 in synchronization with the transport system 10. The copy paper 40 or the notebook 50 is conveyed through the conveyance roller 13 with a portion of it protruding from the open end 11 of the conveyance system, through the transfer system 6 and the fixing system 7, and from the copy ejection system 9 to the outside of the system. . The image of the original document 1 is copied onto a predetermined portion of the obtained copy paper or notebook.

When copying onto standard copy paper, use paper feed system 8.
The standard paper stored in the cassette 82 passes through the paper feed roller 821, enters the conveyance system 10, and is copied through the same steps. In this case, since the copy paper does not protrude outside, there is no need to drive the copy paper mounting table 18.

Effects of the invention: In the copying machine of the invention, at least a part of the conveyance system is open to the outside of the machine over the entire traveling direction, so it is possible to copy even copy paper that is sufficiently wider than the effective width of the photoreceptor drum. Is possible. Moreover,
It does not matter whether the copy paper is in the form of a sheet or in a bound form such as a notebook. Since the portion of the copy paper that protrudes from the outside is supported by the copy paper placement plate that moves in synchronization with the conveyance system while being conveyed, there is no risk of misalignment during conveyance. Therefore, a desired image can be copied to a predetermined position on paper of any size. Since it is possible to copy directly onto one page of a notebook, the efficiency of transcription work is greatly improved.

[Brief explanation of the drawing]

Figures 1 and 2 are a perspective view and a front cutaway view of the main parts of a conventional copying machine, respectively, and Figures 3 and 4 are
The figures are a perspective view and a front cutaway view of essential parts of the copying machine of the present invention, respectively, and FIGS.
FIGS. 7a and 7b are a partial perspective view and a partial side sectional view showing one end of the conveying roller 13 of the copying machine of the present invention, and FIG. 8 is also a fixing roller. 14, and FIG. 9 is an explanatory diagram showing an example of a drive mechanism for the mounting plate 18 of the copying machine of the present invention. 1... Original, 2,100... Photosensitive drum,
8,101...Charging system, 4,102...Exposure system,
5,103...Development system, 6,104...Transfer system,
7,105...Fixing system, 8,106...Paper feeding system,
9,107...Copy ejection system, 10,108...
Conveyance system, 11... Conveyance system open end, 12, 110...
... Conveyance path, 13, 111 ... Conveyance roller pair, 1
4,112... Fixing roller pair, 5,113... Paper ejection roller pair, 16... Front side plate, 17... Slide support base, 18... Copy paper placement plate, 19, 20...
Pulley, 21... wire, 40... non-standard copy paper, 50 notebook, 132... spring material.

Claims (1)

[Scope of utility model registration request] The path width of the transfer paper transport system in the paper feeding system, transfer system, and fixing system is sufficiently wider than the effective width of the photoreceptor drum of the transfer system over almost the entire area in the traveling direction, and A copying machine in which at least one side edge in the width direction is open to the outside over the entire area in the traveling direction so that a portion of the transfer paper conveyed through the transfer paper conveyance system protrudes.