JPS6397541A - Automatic paper feeder - Google Patents

Abstract

PURPOSE:To aim at combined use with other related devices, by installing a paper inlet port different from an ordinary paper inlet, and feeding the paper delivered out of other related devices into an image printer body by way of this special inlet port. CONSTITUTION:Plural sheets of paper are supported by a paper presser plate, a front presser plate and a side plate 35. Under this state, if a paper separate roller 36 is driven, the paper is conveyed to a resist roller 12 part along the paper guide 37. Here, if it is combined with a large capacity feeder 41, drive of a paper feed roller 39 is selected by a selector device of a planetary gear or the like on the basis of a command out of a printer body, whereby these sheets are separated piece by piece by the paper separate roller inside the large capacity paper feeder 41, and the paper so far fed up to the paper feed roller 39 is fed into the printer body.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a paper feeding device used by being attached to an image printing apparatus, and particularly to a paper feeding device for use in conjunction with other paper feeding related devices.

[Conventional technology]

FIG. 4 shows a schematic configuration of a conventionally devised electrophotographic image printing apparatus and a paper feeding device used in this apparatus.

The paper feeder rIt1 is in the form of a cassette and is detachably attached to the printing device 2. The sheets stored here are sent sheet by sheet by sheet separation rollers 3 through sheet registration rollers 12 to an image forming section inside the printing apparatus. The image forming part includes a photosensitive drum 4 and a charger (1t5).
, an optical transfer unit, a developer 7, a transfer charger 8, a cleaner mechanism 9, an eraser lamp 10, a fixing device 11, etc., and prints on the paper. The printed sheets are stacked on a tray 14 through a paper discharge port 13. It is considered that such a printing device It[ri printing speed is fast and can use various types of paper, and for example, it is used by being attached as an option in addition to the paper feed device t1. - For example, when using a large-capacity paper feeder 15 in addition to the paper feeder 1, in such a printing device, another paper intake port 16 is provided at the bottom of the mark 1ii+1 ft2, and a large-capacity paper feeder 15 is used. A structure is adopted in which paper is selectively fed to and taken into the paper registration roller 12 portion via a paper separation roller 17 inside the paper device 15 and a paper processing plate 18.

FIG. 5 shows another example of an electrophotographic image printing device 21, which was devised especially to reduce the floor area occupied, and in this case, a so-called auto sheet feeder 19 is used as a paper feeding device. There is.

Unlike the removable cassette type shown in the example shown in FIG. 4, such a paper feeding device replenishes paper by releasing the contact pressure of the paper separation roller 20 against the paper by some method, but it does not allow the paper to enter the printing device. The purpose of continuously feeding paper is the same. In FIG. 5, the image forming portion is the same as in the first row, such as a paper registration roller 12, a photosensitive drum 4, a charging device 5, a light filling head 6, a developing device 7, a transfer charging device 8, a cleaner mechanism 9, The printed paper is composed of an eraser lamp 10, a fixing device 11, etc., and is loaded onto an external tray 14 by a paper ejection roller 13. In the case of this example as well, a large-capacity paper feeder [22] is required as an option, but a second paper intake port 23 is provided at the rear of the printing device 21 as in the example shown in FIG.

[Problem that the invention seeks to solve]

As explained in the previous section, in the conventional configuration of an image printing device and a paper feeding device, if another paper feeding device f is used in combination, another paper intake port must be installed in the image printing device, and an option is required. For users who do not want to use this method, it is difficult to accept that it will increase the cost of the printer itself. Also @5
In the example shown in the figure, when replenishing toner to the developing device 7, the paper feeder [
19 is removed and the toner is replenished from above, but if there is a paper conveyance path here, it is necessary to configure this paper conveyance path so that it can be removed or moved.
Complication 1: Other toners may stain the paper/general feed path and may adhere to the printed area.

It is an object of the present invention to solve the above-mentioned problems and to provide a hanging paper feed device f that can be used in combination with other paper feed related devices without making any changes to the structure of the main body of the printing device. .

[Means for solving problems]

In order to solve the above-mentioned problems, the present invention provides a paper inlet that is separate from the original paper inlet in a commonly used paper-covering device, and allows paper fed from other paper feed-related devices to be passed through the inlet. The structure is such that the paper is fed into the image printing device body via the .

〔Example〕

FIG. 1 shows a cross-sectional view of an automatic paper feeding device 31 of the present invention attached to an image printing device 21 as shown in FIG. In the figure, 32 is the paper stamper, 33 is the support @53
34 is a front presser plate, 65 is a side plate, 36 is a paper separation roller, 57 is a paper guide, and multiple sheets of paper are held together by the paper presser plate and the front Presser plate 3
4 and the side plate 35, and the spring 33b of the paper press plate 33
is pressed against the paper separation roller 36 by the reaction force caused by the paper separation roller 36. In this state, when the paper separation roller 36 is driven by some means, the paper is separated one by one and conveyed along the paper guide 37 to the paper registration roller 12 portion of the image printing apparatus main body 21. On the other hand, another paper inlet 38 is provided at the rear of the paper feeder #31, and the paper inserted through this inlet is sent to the paper registration rollers 12 of the printing device along a pair of paper feed rollers 59vc and a paper guide 40. 9 including 1. Now the second
To explain an example in which paper is used in combination with a large-capacity paper feeder 41 as shown in the figure, normal paper is sent from the automatic paper feeder side to the printing device by operating the paper separation roller 36, but the large-capacity paper feeder When the device 41 is used, the drive is switched to the paper feed roller 39 by a switching means (not shown) such as a planetary gear based on a command from the printing device main body, and the paper separation roller inside the large capacity paper feed device 41 is switched. Then, the paper is separated one by one and fed to the paper feed roller 39, where it is fed into the main body of the printing apparatus. Further, FIG. 3 shows an example in which the printer is used in combination with an automatic double-sided printing device 51 that reverses the printed paper discharged from the image printing device and sends it back into the printing device. In this case as well, when paper is fed from the double-sided printing apparatus side, the paper feeding roller 39 is driven to feed the paper into the printing apparatus as in the previous example.

〔Effect of the invention〕

As described above, the automatic paper feeding device of the present invention can be used in combination with other paper feeding related devices without imposing any burden on the image printing device itself, and in particular, the automatic paper feeding device of the present invention can be used in conjunction with other paper feeding related devices, such as the one shown in FIG. When applied to a structure in which paper is fed from above, the desired purpose can be achieved without increasing the height of the image printing apparatus itself or imposing layout constraints.

[Brief explanation of the drawing]

FIG. 1 shows a sectional view of the automatic paper feeding device of the present invention in a state where it is torn into an image printing device. 51...Automatic paper feeder 32...Paper stunker 33...Paper presser plate 34...Front presser plate 35...Side plate 36 ... Paper separation roller 57 ... Paper guide 38 ... Paper intake port 59 ... Paper feed roller 40 ... Paper guide Fig. 2 and FIG. 3 show an example in which the automatic paper feeding device of the present invention is used in combination with other paper feeding related devices. 41...Large capacity paper feeder 51...Automatic duplex printing device Figures 4 and 5
The figure shows a conventional automatic paper feeding device and a conventional example in which the same is used in an image printing device. 1... Paper feeding device 2... Image printing device 3... Paper separation roller 4... Photosensitive drum 5... Charging device 6. ... Original writing head 7 ... Developer 8 ... Transfer charger 9 ... Cleaner mechanism 10 ... Eraser lamp 11 ... ... Fixing device 12 ... Paper registration roller 1'3 ... Paper ejection roller 14 ... Tray 15 ... Large capacity paper feeding device 16 ... ...Nine slots for sheets 17...Paper separation roller 18...Paper guide plate 19...Auto sheet feeder 20...
・Paper separation roller 21...Image printing device 22...Large capacity paper feed device 23...Paper intake port Applicant: Seiko Epson Corporation. Figure 4 it Figure 5

Claims (2)

[Claims] (1) A paper feeding device that is used by being attached to an image printing device using an electrophotographic method, etc., which includes a holding member that holds multiple sheets of paper, and a holding member that makes frictional contact with the sheets and feeds each sheet one by one. In an automatic paper feeding device, the paper feeding device includes a paper separation roller that separates the paper and sends it out toward the paper entrance direction of the image printing device, and a paper guide that guides the paper sent out by the separation roller toward the paper entrance direction. An automatic paper feeder characterized in that a separate paper intake port is provided at the rear of the paper feeder. (2) A claim characterized in that the invention includes a paper feed roller that conveys the paper inserted from the paper intake port toward the paper entrance of the image printing device, and selectively drives the paper separation roller and the paper feed roller. Automatic paper feeder according to scope 1.