JPS60197541A - Transfer paper supply device - Google Patents

Abstract

PURPOSE:To make the space of a transfer paper supply device in a compact size, by moving a single paper supply device with respect to a plurality of copying paper storing sections. CONSTITUTION:In association with a selection signal, a paper supply device 3 is raised through a wire 4 by driving a motor up to a position higher than a selected tray 7, and is stopped there. After a tray 7 is pushed out by means of a cam 9 the paper supply device 3 is lowered down to the level position of the selected tray 7 to make a pick-up roller 15 on the paper supply device 3 side in contact with a transfer paper P in the tray 7 to set up a condition in which copying is possible. In this condition, a copying button is depressed to drive rollers in the paper supply device 3 by means of a drive device to feed papers P in the tray 7 one by one.

Description

Detailed Description of the Invention (Technical Field) The present invention relates to a transfer paper supply device in an image forming apparatus, and particularly to a transfer paper storage S (cassette, paper mounting table).
This relates to a transfer paper supply device # in which a plurality of stages are provided in the vertical direction.

(Prior art) Conventionally, in image forming devices such as photographic machines, transfer paper is stored in a cassette or tray and stored in the image forming device. Supplied one by one. In such image forming apparatuses, when changing the size, type, and feeding direction of the transfer paper, it is necessary to replace the cassette or replace the transfer paper in the tray.

In order to reduce this work as much as possible, copying machines have been proposed that are equipped with a plurality of paper feeding devices and that house a plurality of cassettes or trays in an image forming apparatus.

However, in order to accommodate all the sizes and types that can be copied in such a copying machine, a large number of paper feeding devices are required, making the copying machine cumbersome, expensive, and large. The paper feed device fit is about 3 stages.

However, as copying machines have recently become more multi-functional, functions such as reduction and enlargement have been added, and users are considering preparing different cassettes for the same size but different types of transfer paper depending on their purposes. Currently, it is necessary to prepare six to eight types of cassettes, and the user is inevitably required to change the cassettes. Furthermore, when such a large number of cassettes are prepared, the user has to worry about where to store the cassettes. In addition, recent copiers have added an automatic paper feed selection function that detects the document size and automatically selects the transfer paper, and for this reason, it is desirable to have a device that can accommodate all sizes that can be copied. ing.

(Objective) The present invention has been made in view of the drawbacks and background of the conventional examples, and provides a transfer paper supply device that has a simple mechanism and takes up little space, but can accommodate all sizes of copyable paper. The purpose is to do.

(composition) EMBODIMENT OF THE INVENTION Hereinafter, the structure of this invention is demonstrated based on the illustrated Example.

FIG. 1 is a side view showing the entire transfer paper supply device according to an embodiment of the present invention.

In this embodiment, a copying machine main body 1 and a transfer paper supply device 2 are used in combination as separate units.

In the embodiment, the transfer paper supply device 2 includes six trays 7, and can accommodate six types of transfer paper P.

The tray 7 is placed on the tray pedestal 8 by a cam 9 at C and D in the figure.
The tray holder 8 is engaged with the main body frame of the transfer paper supply device &2 via a rail member 10 so as to be freely drawn out in the front direction in FIG.

The cam 9 is selectively driven by a clutch, which is not shown in the drawings.

The paper feeding device 3 engages with the main body frame via a guide member so as to be able to move up and down, and is moved up and down by a motor 5 via a wire 4 . In addition, in the event of a jam, etc., the transfer paper inside the machine can be removed by opening it along with the conveyance path, using O as a fulcrum, as shown by the dashed line in the figure.

Next, the operation of the pickup roller 15 for adjusting the paper feeding pressure will be explained based on the operation diagrams shown in FIGS. 1, 2, and 3.

Suppose now that the user selects one of the six trays. In response to the selection command, the paper feeder 3 is first moved to a higher position than the selected tray (as shown in FIG. The higher position, δ〉0 in the figure
move and stop to the position).

Next, the selected tray 7 is pushed out to the paper feeding position by the cam 9, and when it stops, the paper feeding device 3 descends. The height of the paper feeding device 3 is controlled so that the pick-up roller 15 and the transfer paper P are in contact with each other and the arm angle θ of the pick-up roller 15 shown in FIG. 3 is always within a certain range. Therefore, as the number of transfer sheets decreases, the paper feeding device 3 moves down. When the paper feeding device 3 comes into contact with the transfer paper and stops,
The state becomes copyable. When the user presses down the copy button in this state, each roller of the paper feeding device 3 is driven by a drive device not shown in the drawings, and the transfer paper P is fed one by one. The fed transfer paper P is separated and changed direction within the paper feeder 3, and is transferred to the copying machine by two conveyor belts (6) disposed in front and behind the paper feeder 30 in FIG. Main body 1
and copied.

FIG. 4 is an external perspective view of the main part centered on the tray 7 section;
FIG. 5 is a side view thereof.

The tray 7 is movably engaged with the tray holder 8 by a rail member 11, and is biased by a spring member 13 so as to be constantly pressed against the cam 9. Therefore, the tray 7 moves forward and backward in accordance with the operation of the cam 9. The tray pedestal 8 is engaged with the frame of the main body of the transfer paper supply device 2 via a rail member 1O so as to be freely removable in and out of the machine.

Reference numeral 12 in the figure is a rotary piece rotatably supported by the tray holder 8, and a spring member not shown in the figure applies a force to rotate it in the direction of arrow A in the figure. Forced.

Therefore, when the tray 7 is at the paper feeding position m (the position f pushed out by the cam) K, the tray 7 is tipped over by the tip of the tray 7, and the tray 7
It is raised when it moves back from the paper feeding position, and serves as a guide fence for the two bundles of transfer paper in the paper feeding direction, and serves as a reference for the paper stacking position when replenishing paper.

FIG. 6 and FIG. 7 are a schematic side view and a front view of the paper feeding and conveying section, respectively.

The paper feeding device 3 includes a pickup roller 15. Drive roller 1
6. Consists of a separation roller 17, a pair of transport rollers 18 and 19, a guide plate 14, arm parts, side plates, etc., and is vertically movably engaged with the main body frame via a guide member not shown in the drawings. It is moved up and down by a motor 5 via a wire 4. The paper feeding device 3 is located between two conveyor belts 6 as shown in FIG. 7, and the guide plate 14 and the belts 6 are substantially on the same plane as shown in FIG. Therefore, the fed transfer paper P is separated and changed direction within the paper feeding device la, and is transported by the transport bell (6). In this embodiment, the conveyor belt 6 is of a type that attracts the transfer paper using a vacuum.

In this embodiment, the transfer paper storage section is a tray, but the tray 7 in this embodiment can easily be configured to serve as a cassette holder on which a cassette is placed.

A device using a conventional cassette is also easily conceivable. In order to push out the tray 7, the cam 9 is used in this embodiment, but there are also methods that use a rack and pinion gear, methods that press rollers against the sides of the tray 7, and methods that use air pressure. Many woodcutter methods and mechanisms such as these can also be considered.

Furthermore, in this embodiment, the paper feeder 3 is lowered as the number of transfer sheets decreases, but as shown in FIG. A system in which the transfer paper P is stopped by a fixed arm 21 and pushed up by the arm 21 may also be considered.

(Effects) The present invention has the configuration and operation as described above.According to the present invention, a single paper feeder is used for a plurality of transfer paper storage units, and the paper feeder is a movable type. The cost and space required are significantly lower than those with paper feeding devices in each storage compartment.

More storage parts can be provided.

[Brief explanation of the drawing]

FIG. 1 is an overall side view showing a transfer paper supply device according to an embodiment of the present invention, FIGS. 2 and 3 are explanatory diagrams showing the state of a pickup roller for adjusting paper feeding pressure, and FIG. A perspective view of the main parts, centering on the tray part, and Fig. 5 is a side view of the same.
Fig. 6 is a side view of the main parts centering on the paper feeding device, Fig. 7 is a front view of the same, and Fig. 8 is a simplified side view of the main parts of another embodiment showing how to apply paper feeding pressure. be. 3...Paper feeding device, 7...Transfer paper storage section (tray). Figure 1 Figure 4 Figure 5

Claims (1)

[Claims] A transfer paper feeding device characterized in that a single paper feeding device is movable to a plurality of transfer paper storage portions and to each transfer paper storage portion.