JPH0145063B2 - - Google Patents

Description

Detailed Description of the Invention The present invention deals with copying machines, printing machines, recording machines, and other sheets (including copying paper, transfer paper, recording paper, printing paper, and other sheet-like members on which images can be formed). The present invention relates to a manual sheet feeding device for a device (hereinafter referred to as a copying machine, etc.).

In copying machines, there are sheets on which images are formed, some of which are used frequently, and others which are not.Generally speaking, there are not many types of sheets that are used frequently, but there are many types of sheets that are used relatively infrequently. It is something. In such a case, it would be extremely wasteful to keep a large number of dedicated paper feed trays in a copying machine etc. in order to use many types of sheets. becomes large. Therefore, in response to the user's request to use as many different types of sheets as possible, the frequently used types of sheets are always kept in the machine, and the relatively infrequently used types are stored one by one from outside the machine. Some devices are equipped with a so-called manual sheet feed mechanism for inserting and feeding sheets, but it is necessary to protrude an insertion stand for manually feeding the sheet outside the device, or to provide a new drive unit to insert the manual sheet into the device. However, it has the disadvantage that the configuration is complicated.

SUMMARY OF THE INVENTION It is therefore an object of the present invention to provide a new manual sheet feeding device for a copying machine or the like which is improved in view of the above drawbacks.

Another object of the present invention is to provide a manual sheet feeder such as a copying machine in which a manual sheet insertion table also serves as a sheet discharge tray.

That is, the configuration of the present invention capable of achieving the above object includes a sheet tray means for storing and stacking sheet materials to be discharged after image formation; a manual feed selection signal that rotates in a direction to discharge the sheets to the sheet tray means; a sheet conveyance path that guides each sheet inserted from outside the machine to an image forming section by reversing the rotation means; This is a sheet inserting device for a copying machine, etc., which is characterized in that it can be used for both purposes.

Since the present invention is particularly effective for double-sided copying devices, an embodiment in which the present invention is applied to a double-sided copying device will be described in detail below with reference to the drawings.

FIG. 1 is a cross-sectional view showing one embodiment of a copying apparatus to which the manual sheet feeder of the present invention can be applied. In the figure, the image of the original 2 placed on the transparent plate 1 of the original table is shown by the moving reflection first mirror 4 that moves integrally with the illumination lamp 3, and by the movement of 1/2 of this moving reflection first mirror 4. While the traveling path length is kept constant by the movable second reflection mirror 5 that moves in the same direction at a speed, the imaging lens 6 and the fixed reflection mirror 7
and 8, the image is slit exposed, and an image is formed on a photosensitive drum 9 rotating in the direction of the arrow in the figure.

The surface of the photosensitive drum 9 is composed of a photosensitive member covered with a transparent insulating layer, and the photosensitive member is first charged with a positive charger 10.
When the document 2 is positively charged and then reaches the exposure section 11, an image of the document 2 on the transparent plate 1 of the document table is formed on its surface. At this time, the photoreceptor receives AC discharge from the AC discharger 12 at the same time as the original image is exposed.
Subsequently, the entire surface is exposed to light from the entire surface exposure lamp 13, and an electrostatic latent image of the document image is formed on the surface of the photoreceptor. Next, the electrostatic latent image is visualized in the developing device 14, and is transferred from either the paper feed section 15 or 16 to the surface of the sheet that is brought into close contact with the photoreceptor.
The developed image is transferred. After the transfer, the sheet is separated from the photoreceptor at a separating section 18 and guided to a fixing section 19. On the other hand, the surface of the photoreceptor is pressed against the blade 2.
0 cleans the remaining toner on the photoreceptor and prepares it again for the next copying cycle. The sheets that have passed through the fixing section 19 are sent out to a conveyance path 21 and then stacked on a fixed tray 22. In the case of copying only the first side of one side, the above copying cycle is completed.

Next, to explain the case of double-sided copying, the first
The process up to transfer and fixing for double-sided copying is exactly the same as for single-sided copying described above. When the disposed sensors 25 and 26 detect the passage of the trailing edge of the sheet with the leading edge out of the device, the signal outputs the discharge rollers 23 and 24.
rotation stops, and then the discharge rollers 23 and 24 rotate in the opposite direction, and the sheet is fed into the apparatus again. However, because a portion of the rear end of the guide plate 27 of the conveyance path 21 is cut out, the sheet is is guided in the direction of another conveyance path 29 by a guide plate 28 .

At this time, the front and back sides of the sheet S are reversed for copying the second side, but with the first side (image side) facing up, about 3/4 of the total length of the sheet S is outside the device. It is ejected to a prominent position. Therefore,
In this state, the user can fully check the copy state on the first side.

Note that the sensors 25 and 26 can also be used as jam detection sensors during single-sided copying and during second-sided copying of double-sided copying described below.

Now, the sheet S sent into the conveyance path 29 is guided again to the transfer charger 17 of the transfer section for forming an image on the second side. Thereafter, the copying process is performed in the same manner as in the case of first side copying, and after passing through the conveyance path 21, both sides are copied onto the fixed tray 22 by the discharge rollers 23 and 24, and the sheets are stacked and stored. As described above, the sheet duplex copying cycle is performed.

Next, the structure of the vicinity of the sheet ejection tray section, which is the main part of the present invention, will be explained with reference to FIG. FIG. 2 is a sectional view of the sheet ejection tray section. In the figure, the sheet normally conveyed from the conveyance path 21 is discharged onto the movable manual feed tray 301 which is moved onto the fixed tray 22 via the discharge rollers 23 and 24, and the sheet is discharged onto the movable manual feed tray ₃₀₁ which is moved onto the fixed tray 22. It can be stored and loaded in cooperation with the section ₂₂₁ .

The movable manual feed tray 30 ₁ is movable alternately between the illustrated broken line position 30 ₁ and the solid line position 30, and has the other end rotatably connected to the rotation shaft 31 of the fixed tray 22 and the rotation shaft 32 of the movable manual feed tray. The connecting link 33 enables the rotary shaft 31 to be displaceably linked to the solid line position 30 and the broken line position 30 ₁ shown in the figure. The movable manual feed tray 30 is fixed at the broken line position ₃₀₁ with a part of the movable manual feed tray placed on the front end of the fixed tray 22, and the rear end of the fixed tray 22 adjusts its sheet storage height. An auxiliary member 34 is provided for this purpose. Further, when the movable manual feed tray 30 is pushed in the direction of the arrow shown in the figure, the movable manual feed tray is moved to the solid line position 30.
The right end portion is held by the right end portion 36 of the fixed tray 22. When the user inserts a sheet S from above the movable manual feed tray 30, the sheet S is held between the discharge rollers 23 and 24 rotating in the direction of the arrow shown in the figure, guided by the guide plate 28, and guided in the direction of the conveyance path 29. , 26, when the leading edge of the sheet is detected, the signal starts driving the image forming mechanism of the copy processing section. Further, the discharge roller 23,
24 is rotated in a direction opposite to that in the normal case, but this can be easily done, for example, by the user inputting a selection signal for manual copying.

Since the present invention has the above-described configuration, the manual sheet insertion section and the sheet ejection tray section can be used spatially.Therefore, there is no need to protrude a dedicated insertion stand for manually inserting sheets, and the configuration and arrangement can be improved. This will make things easier. Further, in the case of a double-sided copying apparatus, since the conveyance path for second-side copying can also be used, the structure is particularly simple and advantageous.

[Brief explanation of drawings]

FIG. 1 is a sectional view of a copying apparatus to which the present invention can be applied, and FIG. 2 is a sectional view of a sheet discharge tray section. In the figure, S is a sheet, 22 is a fixed tray,
23 and 24 are discharge rollers, 25 and 26 are sensors, 30 is a movable manual feed tray, 31 and 32 are rotating shafts, 33 is a connecting link, 34 is an auxiliary member, and 35 is a support member.

Claims (1)

[Scope of Claims] 1. Sheet tray means for storing and stacking sheet materials to be discharged after image formation; and a sheet tray means that rotates in a direction to discharge sheets to the sheet tray means and rotates in the opposite direction in response to a manual feed selection signal. A rotating means; and a sheet conveying path that guides sheets inserted from outside the machine one by one to an image forming section by reversing the rotating means, and the sheet tray means is also used as a manual sheet feeding mechanism. A manual sheet feeding device such as a copying machine. 2. A jam detection sensor for a sheet on which an image has been formed is provided near the manual insertion section, and also serves as a sensor for detecting the manual insertion sheet and starting image forming processing. The sheet manual feeding device according to item 1.