JPS6333867Y2 - - Google Patents

Description

[Detailed description of the invention] <Technical field> This invention relates to a paper feeding device, and more specifically, the invention relates to a paper feeding device, and more specifically, a second paper feeding unit by a paper feeding cassette or manual feeding is provided above a first paper feeding unit by a paper feeding cassette. The present invention relates to a paper feeding device for an electrostatic copying machine or the like.

<Prior Art> Conventionally, as shown in FIG. 1, in the paper feeding device of the above-mentioned electrostatic copying machine, etc., a paper feeding device serves as a guide when installing the paper feeding cassette 1 on the side of the first paper feeding section A. An insertion guide member 2 is provided at a predetermined position above the insertion portion of the paper feed cassette 1, and a feed roller 3
Paper P when feeding one sheet of paper P by
A paper presser 4 is provided in parallel with the feed roller 3 by loosely fitting it onto the rotating shaft of the feed roller 3 to prevent the paper from rolling up (see FIG. 2).
The paper is fed into the paper feed section B side, and a pair of transport rollers 5, 5
A pair of feeding guide plates 6, 6 are provided to guide the upper and lower surfaces of the paper fed by the paper.

In this way, conventionally, the insertion guide member 2, the paper presser 4, and the feeding guide plates 6, 6 are each formed separately, and these are individually assembled to the copying machine. However, the structure became complicated and the assembly work was time-consuming, which hindered cost reduction.

<Purpose> This invention was made in view of this inconvenience, and has a structure that allows each function of the insertion guide member 2, paper presser 4, and lower feeding guide plate 6 to be performed by a single member. The purpose is to simplify, increase assembly capacity, and ultimately reduce costs.

<Configuration> The configuration of the paper feeding device of this invention to achieve the above purpose includes a first paper feeding unit with a paper feeding cassette, and a second paper feeding unit with a paper feeding cassette or a manual feeding unit.
In a paper feeding device of an image forming apparatus that constitutes a paper feeding section, a first guide section that guides insertion of a paper feeding cassette on the side of a first paper feeding section, and a first guide section that prevents sheets in the paper feeding cassette from rolling up. A guide member integrally formed with a main body part and a second guide part that guides the lower side of the paper fed to the second paper feeder side is attached to the feed roller of the first paper feeder. It is characterized by being installed at approximately the same height as the

<Example> Hereinafter, the present invention will be described in detail with reference to attached FIG. 3 and subsequent figures showing examples.

FIG. 3 is a sectional view of a main part of a paper feeding device of an electrostatic copying machine, and FIG. 4 is a side view thereof. A paper feed cassette 10 is inserted into the first paper feed section A.
Further, a second paper feed section B above the first paper feed section A is equipped with a paper feed table 11 for manual feeding. 20
is a feeding roller for taking out sheets of paper P from the paper feeding cassette 10 one by one, and is equipped so as to be able to rotate integrally with respect to the rotating shaft 21.

Reference numeral 30 denotes a guide member provided above the insertion depth of the paper feed cassette 10 at approximately the same height as the feed roller 20, and is parallel to the rotating shaft 21 and has both ends attached to the mounting shaft 22 fixed to the main body of the copying machine. A plurality of rotary shafts 21 are inserted through the main body 31 at predetermined intervals, and the rotating shaft 21 is inserted into an open hole 32 formed in the main body 31 whose lower part is close to or in contact with the paper P in the paper feed cassette 10. Rotation is restricted by insertion and engagement. The guide member 30 is formed into a flat plate shape, and has a first guide portion 33 whose lower side gradually rises outward from the right side portion of the main body portion 31 in FIG. , from the upper part of the main body part 31 to the opposite side of the first guide part 33, a second guide plate facing the upper paper feeding guide plate 6.
A guide portion 34 is extended.

With the above configuration, the paper feed cassette 10 is
When inserting the paper into the paper feed section A, the first guide section 33 of the guide member 30 can guide the upper side of the insertion, and also mainly rolls up the paper P when the paper is fed by the feed roller 20. On the other hand, the paper P' fed from the paper feed table 11 on the side of the second paper feed section B and fed to the inner part by the transport rollers 5, 5 is prevented from being prevented from being fed at the lower part of the paper feed section 31. can be guided by the second guide section 34. Further, since the guide member 30 is in the form of a flat plate, it can be manufactured easily and at low cost by press molding or the like.

In the figures, 13 is a bottom plate for placing the paper P, 14 is a coil spring for urging the bottom plate 13 upward and pressing the paper P against the feeding roller 20.
7 is a registration roller that feeds the paper to the transfer charger (not shown), and 8 is a lever for operating a paper feed detection switch that drives the transport rollers 5, 5 when feeding paper from the second paper feed section B. be.

Next, in the embodiment shown in FIG. 5, each guide member 30
The both ends of the mounting shaft 22 through which the guide member 30 is inserted are not fixed to the main body of the copying machine.
The guide member 30 is fixed in place by engaging its tip with an engagement plate 15 fixed to the main body of the copier. The engagement means is a bent piece 15' at the tip of the engagement plate 15 which is inserted and fitted into a clamping portion 35 formed at the tip of the first guiding portion 33 of the guide member 30.

With the above configuration, the guide member 30 can be easily removed in the direction perpendicular to the rotation axis 21 of the feed roller 20 by simply pulling the guide member 30 in the direction of the insertion opening 12 of the paper feed cassette 10. Furthermore, since it is easy to insert and engage again, even if a paper jam should occur, it can be dealt with easily and quickly, which is very convenient.

It should be noted that the above-mentioned paper feeding device according to this invention can of course be applied to a copying machine in which the second paper feeding section B shown in the figure is configured with a manual feeding table, as well as a copying machine in which this is configured with a paper feeding cassette. . Also,
The shape of the guide member 30 is not limited to the illustrated shape either.

Furthermore, the paper feeding device of this invention can of course be applied to other image forming apparatuses such as facsimile machines and document reading apparatuses.

<Effects> As described above, according to the paper feeding device of this invention, the first guide member provided at approximately the same height as the feeding roller
The guide part can guide the insertion of the paper feed cassette on the first paper feed unit side, and the main body part of the guide member can guide the paper roll-up when the paper is fed one by one by the feed roller. It can prevent rising,
Furthermore, the second guide section can guide the lower side of the paper fed to the second paper feed section, so that the insertion guide member of the paper feed cassette on the first paper feed section can be used as a conventional guide. Similarly, there is no need to configure the paper presser in the paper feed cassette on the first paper feed section side and the lower guide plate on the second paper feed section side separately, which simplifies the structure and facilitates assembly. This has unique practical effects, such as increased efficiency and cost reduction of the image forming apparatus.

[Brief explanation of the drawing]

FIG. 1 is a partially cutaway front view showing an example of a conventional electrostatic copying machine, FIG. 2 is a side view of the same main part, and FIG. 3 is a cross-sectional view of the main part showing the paper feeding device of this invention. Fourth
The same figure is a side view, and FIG. 5 is a sectional view of a main part showing another embodiment. 10...Paper feed cassette on the first paper feed unit side, 11...
...Paper feeding table on the second paper feeding unit side, 20...Feeding roller, 21...Rotary shaft for feeding roller, 30...
Guide member, 31... Main body part, 33... First guide part of the guide member, 34... Also second guide part, A... First paper feeding part, B... Second paper feeding part, P ，
P'...Paper.

Claims (1)

[Scope of Claim for Utility Model Registration] 1. In a paper feeding device of an image forming apparatus in which a second paper feeding section B is configured by a paper feeding cassette or manually fed above a first paper feeding section A formed by a paper feeding cassette 10, A first guide section 33 that guides insertion of the paper feed cassette 10 on the paper feed section A side, a main body section 31 that prevents the paper P in the paper feed cassette 10 from rolling up, and a second guide section 33 on the paper feed section B side. A second guide portion 34 that guides the lower side of the paper P′ that is fed to the
A guide member 30 integrally formed with
A paper feeding device characterized in that the paper feeding device is provided at substantially the same height as the feeding roller 20 of the first paper feeding section A. 2. The paper feeding device according to claim 1, wherein the guide member 30 is engaged with the rotating shaft 21 of the feeding roller 20. 3. The paper feeding device according to claim 2, wherein the guide member is removably engaged in a direction orthogonal to the rotation axis of the feeding roller. 4. The paper feeding device according to claim 1, wherein the guide member 30 is in the form of a flat plate.