JPH0712349Y2 - Multi-stage paper feeder - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Technical Field] In the present invention, a multi-stage feeding for replenishing recording paper into the paper feeding cassette is performed by sliding a paper feeding unit for accommodating multi-stage paper feeding cassettes from the main body by a slide rail. Regarding the paper device, more specifically, a guide is provided in the lower paper feeding cassette among the multi-stage paper feeding cassettes in the paper feeding unit,
The present invention relates to a multi-stage paper feeding device that makes it possible to slide in a direction perpendicular to the sliding direction of a paper feeding unit to easily supply recording paper to a lower paper feeding cassette.

[Prior art]

For example, in a copying machine, since recording papers of a plurality of sizes are used in correspondence with the document to be copied, a plurality of paper feed cassettes housed in the paper feed unit are also provided corresponding to the sizes of the recording papers. There must be.

In addition to the above, in consideration of the external appearance and downsizing of the copying machine, the paper feeding cassette tends to be built in the copying machine.

In view of the above, at present, a plurality of required paper feed cassettes in a copying machine tend to be stored in multiple stages in a narrow space in the copying machine or in a narrow space in a paper feeding device provided separately from the copying machine. .

When the sheet feeding cassettes are housed in the sheet feeding unit in such a narrow space in multiple stages, the method of supplying recording sheets to each of the sheet feeding cassettes must be different.

The first method of replenishing recording paper to each paper feed cassette is to pull out the paper feed unit containing the multi-stage paper feed cassettes from the main body of the copying machine by using slide rails.

Next, the recording paper is replenished in that state to the upper paper feed cassette exposed by the sliding movement of the paper feed unit.

Secondly, with respect to the lower sheet feeding cassette, first, the upper sheet feeding cassette is removed from the sheet feeding unit, recording paper is replenished to the lower sheet feeding cassette exposed by the removing operation, and then the upper sheet is again fed. Set the paper feed cassette of to the paper feed unit.

After that, the slide rail is used to push the paper feeding unit into the main body of the copying machine, thereby completing a series of recording paper supply processing.

However, in the conventional multi-stage paper feeding device, when the recording paper is replenished to the lower paper feeding cassette, the upper paper feeding cassette in the paper feeding unit has to be removed, so that the operability is deteriorated. There is a drawback that recording paper cannot be quickly replenished.

In addition, as described above, it is necessary to remove the upper sheet cassette in the sheet feeding unit, and at the time of removal, the upper sheet cassette may be dropped or bumped to impact the sheet cassette itself or peripheral devices. , Damage may occur. Further, in the conventional multi-stage paper feeding device, there is a problem that a work space is large when the recording paper is replenished to the paper feeding cassette, resulting in poor work efficiency.

〔Purpose〕

The present invention has been made in view of the above, and an object of the present invention is to facilitate recording paper replenishment to a lower sheet feeding cassette in a sheet feeding unit, improve its operability, and speed up recording. It enables paper replenishment, prevents the paper feed cassette from dropping during removal, avoids damage to the paper feed cassette or its peripherals, and replenishes the recording paper to the paper feed cassette. An object of the present invention is to provide a multi-stage sheet feeding device in which the working space during execution is minimized and the working efficiency is improved.

〔Constitution〕

In order to achieve the above-mentioned object, a multi-stage paper feeding device by the main building is configured such that a paper feeding unit for accommodating a multi-stage paper feeding cassette is slid out integrally from a main body of a device by a slide rail, and recording paper is stored in the paper feeding cassette. In a multi-stage paper feeding device for replenishing paper, a guide is provided at a side portion of a paper feeding cassette other than the uppermost one of the multi-stage paper feeding cassettes in the paper feeding unit, and a guide rail corresponding to the guide is provided in the paper feeding unit. Provided in the insertion part of the unit,
After the paper feeding unit is slid integrally from the main body of the apparatus, the paper feeding cassettes other than the uppermost one are slid from the paper feeding unit in a direction perpendicular to the sliding direction of the paper feeding unit. Is.

An embodiment of the multi-stage paper feeder according to the present invention will be described below with reference to the accompanying drawings.

FIG. 1 is a structural explanatory view of a copying machine 1 equipped with a multi-stage paper feeding device 2. The copying machine 1 optically scans a contact glass 3 on which an original is placed and a certain original placed on the contact glass 3. Optical scanning unit 4, a photoconductor drum 5 whose surface is exposed by the optical information of the document obtained by the optical scanning unit 4 to form a latent image, and a paper feed cassette 8 (which contains recording paper). This paper feed cassette is installed in the copying machine 1), and carrying rollers 6, 7, 12 for carrying the recording papers in the paper feed cassette 8 one by one to the transfer section.
A transfer device 9 for transferring an image visualized by a developing device (not shown) on the photosensitive drum 5 onto the conveyed recording paper, and a toner after the transfer. It has a fixing device 14 for fixing the recording paper holding the image, and a discharge tray 13 for discharging the recording paper after fixing.

Further, in order to convey recording sheets of plural sizes to the transfer section of the copying machine 1, a multi-stage paper feeding device 2 in which a plurality of paper feeding cassettes are stored in a multi-stage is connected to the lower part of the copying machine 1. Has been done.

The multi-stage sheet feeding device 2 includes a sheet feeding unit 25 for accommodating a plurality of sheet feeding cassettes in a multi-stage state, and a slide rail 28 for sliding the sheet feeding unit 25 to the outside of the multi-stage sheet feeding device 2.
And an upper paper feed cassette 23 which is housed in a multi-stage state in the paper feed unit 25, and a lower paper feed cassette 24 which is arranged and housed below the upper paper feed cassette 23. Transport rollers 15, 1 for transporting the recording papers 26 stored in the copying machine 23 one by one to the transfer section in the copying machine 1 are provided in the 23.
7, 18 and 7, a recording paper placing plate 27 for constantly contacting the recording paper 26 with the conveying roller 18, and an urging means 21 for urging the recording paper placing plate 27 upward. .

Similarly, the lower paper feed cassette 24 also has conveyance rollers 16, 19, 20,
A recording paper placing plate 27 and a biasing means 32 are provided, and further a guide rail 29 for slidingly moving the lower paper feeding cassette 24 to the outside of the paper feeding unit 25 is provided.

The guide rail 29, as shown in FIG.
The lower sheet feed cassette 24 is formed on the lower sheet feed cassette insertion portion, and the guide rail 29 has a tip end portion for accommodating the tip portion of the lower sheet feed cassette 24 and the lower sheet feed cassette 24 freely on the guide rail 29. Curved protrusion that locks against movement
30 are provided.

FIG. 3 is a partially enlarged perspective view of the lower sheet feeding cassette 24. The guide rail 29 is provided on the side of the lower sheet feeding cassette 24.
Is provided with a guide 34, and the guide 34 is provided with a recess 31 that engages with a protrusion 30 formed on the guide rail 29.

In addition, an alignment plate 36 for aligning the recording papers 26 in the cassette is provided in the lower paper feed cassette 24.

FIG. 4 is a cross-sectional view showing a state where the lower sheet feeding cassette 24 is housed in the sheet feeding unit 25.
Is a paper feed unit by a guide 34 provided on its side.
It is possible to slide on the guide rail 29 formed on the 25.

The operation of the above configuration will be described with reference to FIG.

When all the recording papers 26 in the lower paper feed cassette 24 are used up by the execution of the copying process of the copying machine 1, the recording papers 26 must be replenished in the lower paper feed cassette 24.

When replenishing the recording paper 26, first, the multi-stage paper feeding device 2 is opened, the grip 35 provided on the paper feeding unit 25 is held, and the paper feeding unit 25 is pulled out in the arrow A direction.

In this state, since the upper paper feed cassette 23 is exposed, the recording paper 26 can be easily replenished to the upper paper feed cassette 23 in this state.

Secondly, pull out the lower paper feed cassette 24 in the direction of arrow B.

As a result, the lower sheet feeding cassette 24 slides on the guide rail 29 formed on the sheet feeding unit 25 in the direction perpendicular to the sliding direction of the sheet feeding unit 25, and the lower sheet feeding cassette 24 is fed. The upper surface of the cassette 24 is exposed.

When pulling out the lower paper feed cassette 24, since the locking projection 30 is provided on the guide rail 29, the concave portion of the guide 34
Although 31 is in the locked state, since the locking projection 30 is curved, it does not cause much trouble.

Thirdly, the recording paper 26 is replenished in the lower paper feeding cassette 24 which is pulled out in the direction of the arrow B and the upper surface of which is exposed, and the recess 31 of the lower paper feeding cassette 24 is engaged with the locking 30 of the paper feeding unit 25 again. Slide it on the guide rail 29 until it does.

After that, as a fourth step, the paper feed unit 25 is slid on the slide rail 28 using the handle 35, is housed in the multi-stage paper feed device 2, and the multi-stage paper feed device 2 is closed to complete a series of operations. .

Like the present invention, the lower sheet feeding cassette 24 is used as a sheet feeding unit.
If it is slidable in a direction perpendicular to the sliding direction of 25, not only will it be easier to supply recording paper to the lower paper feed cassette 24, but it will not be necessary to remove the upper paper feed cassette 23 either; It also avoids the risk of damage.

〔effect〕

As described above, according to the multi-stage sheet feeding device of the present invention, a guide is provided at the side of the lower sheet feeding cassette in the multi-stage sheet feeding cassette, and the guide rail corresponding to the guide is provided in the lower stage of the sheet feeding unit. It is provided in the insertion part of the paper feed cassette, and the paper feed cassette of the lower stage from the paper feed unit is
The sliding movement facilitates recording paper replenishment to the lower paper feed cassette in the paper feed unit, improves its operability, and enables quick recording paper replenishment and the paper feed cassette associated with the removal operation. It is possible to prevent the paper sheet from dropping and to prevent damage to the paper feeding cassette or its peripheral devices. Further, it is possible to minimize the work space when replenishing the recording paper to the paper feed cassette and improve the work efficiency.

[Brief description of drawings]

FIG. 1 is a structural explanatory view of a copying machine equipped with a multi-stage paper feeding device according to the present invention, and FIG. 2 is a partially enlarged perspective view of an insertion portion of a lower paper feeding cassette of a paper feeding unit according to the present invention. FIG. 3 is a partially enlarged perspective view of a lower sheet feeding cassette according to the present invention, FIG. 4 is a sectional view showing a state where the lower sheet feeding cassette is stored in the sheet feeding unit of the present invention, and FIG. FIG. 4 is a perspective view showing a state in which a paper feeding unit and a lower paper feeding cassette according to the present invention are pulled out. Explanation of symbols 1 …… Copier, 2 …… Multi-stage paper feeding device 23 …… Upper paper feeding cassette 24 …… Lower paper feeding cassette 25 …… Feeding unit, 26 …… Recording paper 29 …… Guide rail 34 …… guide

Claims (1)

[Scope of utility model registration request] 1. A multi-stage paper feeding device for replenishing recording paper into the paper feeding cassette, wherein a paper feeding unit for accommodating a multi-stage paper feeding cassette is integrally slid out from a main body of a device by a slide rail, A guide is provided at a side of a paper feed cassette other than the uppermost one of the multi-stage paper feed cassettes in the paper unit, and a guide rail corresponding to the guide is provided at the insertion portion of the unit in the paper feed unit, and the apparatus main body is provided. From the sheet feeding unit, the sheet feeding cassettes other than the uppermost one slide from the sheet feeding unit in a direction perpendicular to the sliding direction of the sheet feeding unit. Paper feeder.