JPH03272951A - Image forming device - Google Patents

Abstract

PURPOSE:To carry out paper feed and paper discharge free from obstruction with simple constitution, by installing a plurality of paper feed/discharge guides having a paper feeding guide part formed on the undersurface and having a paper discharge guide part formed on the upper surface, between a manual paper insertion port and a paper discharge port. Located above it at an interval in width direction. CONSTITUTION:A plurality of paper feed/discharge guides 46 having a paper feeding guide part 44 formed on its undersurface part and a paper discharge guide part 45 formed on the upper surface part are arranged between a manual paper insertion port 1 and a paper discharge port 2 at an interval in the width direction. The paper feeding/discharge guide 46 is installed on a body side by a permanent magnet 47, and each position of a plurality of guides 46 can be changed according to the width of a roll paper 5 guided to the paper feeding port 1. Accordingly, even if a roll paper 5 is curled, the roll paper 5 is guided by the paper feed guide part 44 and can be supplied smoothly into the manual paper insertion port 1, while the paper sheet is guided into a paper discharge passage 36 by the paper discharge guide part 46, and the supply of paper sheets to the manual paper feeding port 1 again is prevented.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to an image forming apparatus such as an electrostatographic copying machine or a facsimile machine.

[Conventional technology]

Conventionally, in image forming apparatuses in which a paper ejection port is formed above the manual paper feed port, if the paper (transfer paper) is curled,
When the curled part of the paper hits the upper edge of the manual paper feed slot during paper feeding and is folded back, or when the transfer paper after image formation is ejected from the paper ejection slot, the curled part may reappear at the bottom of the paper ejection slot. There was a possibility that the paper could get inside the manual paper feed slot and be re-feeded.

[Problem to be solved by the invention]

The present invention has been made with the above-mentioned considerations in mind, and its purpose is to reduce the folding phenomenon of both corners of transfer paper during paper feeding, and to prevent transfer of paper from a paper discharge port formed above the manual paper feed port. To prevent the occurrence of paper refeeding phenomenon when paper is ejected with a simple structure.

[Means to solve the problem]

Technical point 1 taken by the present invention to achieve the above object
The image forming apparatus according to the present invention has a paper ejection port formed above the manual paper feed port, and the manual paper feed L. A plurality of paper feed/discharge guides, each having a lower surface portion formed as a paper feed guide portion and an L surface portion formed as a paper discharge guide portion, are provided at intervals in the width direction between the paper ejection [11]. It is said that

[Function] According to the above configuration, since a paper feed/discharge guide is provided between the manual paper feed port and the paper discharge M [iiE], if both corners of the leading edge of the transfer paper are curled upward However, the transfer paper is reliably guided into the manual paper feed slot by the paper feed guide section on the lower surface of the paper feed/discharge guide, and both sides of the transfer paper discharged from the paper supply/discharge slot are guided to the paper feed/discharge guide 3. [The paper is guided by the paper ejection guide section on the surface section, and is prevented from entering the manual paper feed slot (re-feeding).

〔Example〕 Hereinafter, an embodiment of the present invention will be described based on the drawings.

1 to 3 show an electrostatographic copying machine as an example of an image forming apparatus. This electrostatic photocopying machine has manual paper feed port 1.
A copying machine main body (image forming apparatus main body) 3 with a paper discharge D 2 formed above the copying machine main body 3, a movable deck 4 on which the copying machine main body 3 is mounted, and a manual feed 7 paper feed tray 1 of the copying machine main body 3. It is provided with a roll paper supply knee throat 6 that cuts the roll paper 5 into a predetermined length and supplies it.

The copying machine main body 3 is constructed as follows.

That is, a means 9 for reciprocating the original with respect to the exposure device 8 is provided in the upper part of the device case 7, and a large paper feed force center 10 is provided in the lower part of the device case 7 so as to be freely drawn out toward the roll paper supply unit 6 side. be.

Inside the device case 7, a photoreceptor 11 is provided so as to rotate in the direction of arrow R, and a main charging device 12 is installed around the photoreceptor 11.
, the exposure device 8, the development device 16, the transfer device 15, the separation device 14, and the cleaning device 13 are provided in this order, and these members form an image forming section.

Further, a paper passing guide 17 is provided from the supply section of the paper cassette [10] to the manual paper feed port 1, and a paper feed conveyance path 1B is provided from the sheet feed port 1 to the transfer device F15. A fixing device 19 fixes the transfer paper after transfer and separation, and a paper discharge conveyance path 20 is formed between the fixing device 19 and the separation device 14. Reference numeral 21 denotes a pair of paper ejection rollers provided on the paper ejection 02.

The deck 4 has wheels 22 at its lower part, and has a cut stock part 23 inside thereof which is inclined so that the front side is higher.

The roll paper supply unit 6 is connected to the roll paper supply unit 7 via a connecting mechanism 24.
The unit frame 6A is detachably connected to the front side of the copying machine main body 3, and the paper feeding unit main body 6B is movable up and down with respect to the unit frame 6A. Unit frame 6
A is configured such that wheels 27 are provided at the four corners of the lower surface of the bottom frame 25 via downward spiral shafts 26, so that movement and level adjustment can be made freely. Further, vertical guide rails 28 are provided on both the front and rear sides of the vertical L/- beams erected on both left and right sides of the bottom frame 25.

The paper feed unit main body 6B pivotally supports the rollers 29 that roll along the guide rails 28, and has a loading section 31 for roll paper ξ] and a roll paper 5 loading section 31 inside the lifting frame 30. A pair of paper feeding rollers 32 and a means 33 for cutting the fed roll paper 5 into a predetermined length are provided as the roll paper feeding means, and a roll paper discharge 1-X is provided at the upper end.
'+34. As shown in FIG. 3(a), the roll paper outlet 34 is moved up and down by the lifting mechanism I/-1, -30 to a position matching the manual paper feed port 1 of the copying machine main body 3, and a position corresponding to the manual paper feed port 1 of the copying machine body 3. As shown in Figure (B), the device is configured to switch to a standby position located downward from the device (A). Then, when the roll paper ejection port 34 is in the standby position, as shown in question 3 (b), pull out the seventh paper feeder O to the front to replenish cut paper or copy paper. It is possible to prevent the machine body 3 from jamming. 35
is a biasing means (for example, a gas spring) for lifting and biasing the elevating frame 30, and the unit frame 6A
and the elevating frame 1/-me 30. 36 is an inclined guide plate that covers the horn of the cutting means 33;
37 is a cover that can be opened and closed to cover the front surface of the roll paper loading section 31, and 3 is a vertical guide plate provided opposite the cover 37. These 36, 37, and 38 allow the paper output port of the copying machine body 3 to be opened and closed. A vertical paper ejection path 39 is configured to guide the transfer paper ejected from the paper feeding unit main body 6B to the lower side by bypassing the front side of the paper feeding unit main body 6B. 40 is the paper discharge path 3
This is an intermediate guide that guides the transfer paper from the lower end of 9 toward the deck 4 side. Reference numeral 41 denotes a paper discharge tray which is inclined forward and downward and is configured by a bending guide member 42 and a bottom tray 43 having a rising portion 43a at the front end, and is connected to the inner space of the deck 4 and the intermediate guide 4 of the roll paper supply unit 6.
It is provided across the space below 0.

The copying machine main body 3 includes, as shown in FIGS. 4 to 6,
Between the manual paper feed port 1 and the paper discharge port 2, a plurality of paper feed/discharge guides 46 whose lower surface is formed as a paper feed guide section 44 and whose upper surface is formed as a paper discharge guide section 45 are arranged at intervals in the roll paper width direction. It is separated by Then, both sides of the roll paper 5 discharged from the roll paper discharge port 34 are guided into the interior of the manual paper feed port 1 by the paper feed guide section 44, and both sides of the transfer paper p discharged from the paper discharge port 2 are guided. is configured to be guided to the paper ejection path 39 by a paper ejection guide section 45. The paper feed/discharge guide 46 is attached to the copying machine main body 3 side by a permanent magnet 47 such as a rubber magnet fixed to the paper feed/discharge guide 46, and the mounting position can be changed depending on the width of the roll paper 5. It is.

Note that 48 in FIGS. 1 and 5 is a paper discharge guide that guides the widthwise central portion of the transfer paper p discharged from the paper discharge port 2 to the paper discharge path 39.

According to the above configuration, the cut paper fed from the paper feed cassette 10 and the roll paper feed unit 6 are fed to the manual paper feed port 1.
The roll paper 5 that is fed through and cut at a predetermined timing is discharged from the paper discharge port 2 after undergoing image transfer and fixing steps.

When the roll paper 5 is fed by the roll paper supply unit 6, due to curling of the roll paper 5, both corners of the leading edge of the roll paper 5 may be tilted upward, as shown by the imaginary line a in FIG. Even if the paper is curled, the curled portion is guided by the paper feed guide section 44 on the lower surface of the paper feed/discharge guide 46 and smoothly fed into the manual paper feed slot 1, thereby preventing the curled portion from folding back. become.

Furthermore, as shown by the imaginary lines in FIGS. 4 and 5, both corners of the transfer paper (roll paper that has been force-stretched to a predetermined length) p discharged from the paper discharge port 2 are curled downward. Even if the sheet is loaded, the sheet is guided to the sheet discharge path 39 by the sheet discharge guide section 45 on the upper surface of the sheet feed/discharge guide 46, and is prevented from entering the manual sheet feed port 1 (re-feeding).

The transfer paper that has entered the paper discharge path 39 falls freely within the paper discharge path 39, and then is deflected along the moving path toward the deck 4 by the intermediate guide 40. Then, the leading edge of the transfer paper comes into contact with the bent part of the bending guide member 42, and the rear end of the transfer paper falls off the intermediate guide 40, and the rear end of the transfer paper hits the rising part 42a of the inclined lower end. The sheets are arranged so that they are in contact with each other and are stocked on the sheet discharge tray 41.

〔Effect of the invention〕

The present invention has the above-mentioned structure, and has a simple structure with a small number of parts, in which both the upper and lower surfaces of the paper feed/discharge guide are used as the paper discharge guide section and the paper feed guide section, so that both corners of the transfer paper can be folded back during paper feeding. This has the effect of preventing the paper refeeding phenomenon when the transfer paper is discharged from the paper discharge port formed above the manual paper feed port.

[Brief explanation of drawings]

The drawings show an embodiment of the present invention, in which FIG. 1 is a perspective view of an electrostatographic copying machine which is an example of an image forming apparatus, FIG. 2 is a schematic longitudinal sectional side view of the electrostatic copying machine, and FIG. (a) and (b) are schematic side views of the electrostatographic copying machine, FIG. 4 is a longitudinal sectional side view of the main parts, and FIGS. 5 and 6 are perspective views of the main parts. DESCRIPTION OF SYMBOLS 1... Manual paper feed slot, 2... Paper ejection slot, 3... Copying machine body (image forming apparatus body), 5... Roll paper, 6...
... Roll paper supply unit, 31 ... Loading section, 32.
... Paper feed roller pair (roll paper supply means), 33 ... Cutting means, 34 ... Roller discharge port, 44 ... Paper feed guide section, 45 ... Paper discharge guide section, 46 ...・Paper feeding/ejection guide.

Claims (2)

[Claims] (1) For an image forming apparatus main body in which a paper ejection port is formed above the manual paper feed port, the lower surface portion is formed as a paper feed guide portion between the manual paper feed port and the paper ejection port, and the upper surface portion is formed as a paper feed guide portion. An image forming apparatus characterized in that a plurality of paper feed/discharge guides, each of which is formed in a paper discharge guide section, are provided at intervals in the width direction. (2) A roll paper supply provided to the image forming apparatus main body, including a roll paper loading section, a roll paper supply means for feeding out the roll paper, and a cutting means for cutting the fed roll paper into a predetermined length. A claim characterized in that the unit is installed in a state in which the roll paper ejection port of the unit can be switched between a position where it matches the manual paper feed port of the main body of the image forming apparatus and a standby position where it is deviated from the position. The image forming apparatus according to item (1).