JPH0678132B2 - Transfer paper supply device - Google Patents

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a feeding device in an image forming apparatus such as a copying machine, and more particularly to an improvement of a large-capacity transfer paper feeding device provided with a multi-stage transfer paper storage section separately from a main body. It is related.

(Prior Art) Recently, a large-capacity transfer paper which is unitized as a whole, in which a plurality of transfer paper storage units are provided in parallel with each other in the longitudinal direction in addition to the copying machine main body and a single vertically movable paper feeding device is provided. A feeding device has been proposed.

FIG. 4 is a diagram showing a configuration of a sheet feeding device 15 and a conveying path of a (large-capacity) transfer sheet feeding device according to the conventional example, in which the sheet feeding device 15 feeds the sheets one by one. The transfer sheet is guided to the transport section by the guide plate 14 and is transported to the copying machine main body by the transport belt 16 and the pressing roller 13. However, in this configuration, the paper feeding unit and the transport unit are configured as separate bodies, and the paper feeding device 15 remains on the side of the feeding device when the transport path is opened.

For this reason, the transfer paper remaining on the tray side of the paper feeding device 15 cannot be removed unless the tray is pulled out, and depending on the place where the transfer paper remains, when the tray is pulled out, the transfer paper is caught on the frame or the like. , It may be an obstacle when pulling out the tray. Further, the maintainability of the sheet feeding device 15 is also poor, and one guide plate 14 and one pressing roller 13 are required for each tray, resulting in an increase in cost due to an increase in the number of parts.

(Object) The present invention relates to an improvement of this large-capacity transfer paper device, and an object thereof is to provide a transfer paper supply device with higher reliability.

(Structure) To this end, the present invention is characterized in that a single vertically movable sheet feeding device can be opened and closed together with an openable and closable conveying path so that jammed paper can be taken out easily.

Embodiments of the present invention will be described below with reference to the drawings.

FIG. 1 is a front view according to an embodiment of the present invention, which is an example in which the copying machine main body 1 and the transfer paper feeding device 2 are provided separately and used in combination. In the embodiment, the transfer paper supply device 2 is equipped with 6 trays 7 and can store six kinds of transfer papers P. The tray 7 is engaged by a cam 9 on the tray pedestal 8 so as to be movable in the A and B directions in the figure.
1 is engaged with the main body frame of the transfer paper feeding device 2 through the so that it can be pulled out in the front direction in FIG. The cam 9 is selectively driven by a clutch not shown in the drawing. This clutch may be either half rotation or one rotation. In the case of the half rotation clutch, the tray 7 always operates in a state of being in contact with the cam 9, and in the case of the one rotation clutch, when the tray 7 is moved by the cam 9 in the maximum amount in the direction A,
It may be stopped by a stopper so that it does not move in the B direction.

The sheet feeding device 3 is vertically movably engaged with the main body frame via a guide member, and is vertically moved via a wire 4 by a motor 5.

The operation and details of each part will be described below.

Now, it is assumed that the user selects any one tray out of six trays. According to the selection command, first, when the paper feeding device 3 is above the selected tray 7 and the maximum number of transfer sheets is placed, the call roller 11 does not contact the uppermost paper (δ> 0 in FIG. 2). Move and stop.

Next, the selected tray 7 is fed by the cam 9 to the paper feeding position (first
When it is pushed out in the direction (A in the figure) and stopped, the sheet feeding device 3 descends. Then, the call roller 11 and the transfer sheet P come into contact with each other, and the position of the sheet feeding device 3 is controlled so that the inclination angle θ of the arm 12 of the call roller 11 shown in FIG. 3 is always within a certain range. This is achieved by the same control means as the control method in which the sheet feeding device 3 is lowered as the number of transfer sheets P decreases during copying. When θ is within the determined range, the sheet feeding device 3 is stopped and the copy is ready.

When the user pushes down the copy button, each roller of the paper feeding device 3 is driven by a driving device not shown in the drawing, and the transfer paper P is fed one by one. The fed transfer paper P is turned in the paper feeding device 3 at the same time as being separated, and by the two conveyor belts 6 arranged in front of and behind the paper feeding device 3 in FIG. The sheet is vertically transported to and the copy operation is performed in the copying machine.

Further, when an abnormality such as a paper jam occurs, the sheet feeding device 3 is opened around the 0 point as shown by the one-dot chain line in the figure together with the conveying path, and the transfer sheet remaining in the machine can be removed. Since both of the sheet feeding devices 3 are opened, it is possible to remove all the transfer sheet remaining in the device without pulling out the tray 7. Further, maintenance (replacement, cleaning) of each roller forming the sheet feeding device 3 can be easily performed.

(Effects) The present invention is as described above, and according to the present invention, when a paper jam occurs, the remaining paper in the device can be easily removed, and the rollers of the paper feeding device 3 Maintenance (replacement, cleaning) can be done easily.

[Brief description of drawings]

FIG. 1 is a front view showing an internal mechanism of a transfer paper feeding apparatus according to an embodiment of the present invention, FIG. 2 is a view showing a positional relationship between the uppermost paper and a calling roller during tray selection, and FIG. 3 is tray selection. FIG. 4 is a schematic front view showing the main part of the conventional example, and FIG.

 ─────────────────────────────────────────────────── ─── Continuation of the front page (56) Bibliographic references Sho 59-40239 (JP, U) Actual public Sho 58-3793 (JP, Y2) Actual public Sho 57-48835 (JP, Y2)

Claims (1)

[Claims] 1. A plurality of transfer paper accommodating sections are provided substantially horizontally, and a single sheet feeding device moves up and down to a selected transfer paper accommodating section position and a transfer paper accommodating section selected. A transfer paper feeding device having a means for moving to a paper feeding position in the feeding direction and having an openable and closable conveyance path provided on the transfer paper feeding side for carrying the transfer paper into the copying machine body; Transfer paper feeding device characterized in that the paper feeding device is opened and closed