JPH0240059Y2 - - Google Patents

Description

[Detailed Description of the Invention] (Industrial Application Field) The present invention relates to a transport tray in an automatic double-sided copying machine that facilitates the feeding of paper.

(Prior Art) Conventional automatic double-sided copying machines usually include a reversing mechanism that reverses the conveyance state of paper that has already been copied on one side, an intermediate tray that temporarily stores the reversed paper, and a conveyance path between them. In addition to the copying mechanism of After switching the path and sending the paper with single-sided copies to the reversing mechanism and reversing it, the paper is dropped into the intermediate tray through the conveyance path and stored therein (for example,
(See Japanese Patent Application Laid-Open No. 50-99553 and Japanese Utility Model Application No. 58-31543).

In this way, conventional double-sided copying machines require a reversing mechanism and a path from the reversing mechanism to the intermediate tray, making the structure complex, heavy, and expensive to manufacture. When a paper jam occurs in the reversing mechanism or in the path from the reversing mechanism to the intermediate tray during use, it is troublesome to remove the jammed paper.

Therefore, in order to simplify the structure of an automatic duplex copying machine, we installed a tray storage device that extends from a position on the opposite side of the copying machine body from the paper feed cassette (paper storage position) to a position below the paper feed cassette (paper feed position). and a paper feed tray is movably installed therein, so that the tray accepts paper that has been copied on one side at a paper storage position, and is moved by a conveyance means such as a cable to a paper delivery position when copying the back side. something was proposed.

However, the automatic double-sided copying machine equipped with the above-mentioned transport tray eliminates the reversing mechanism and the paper movement path from the reversing mechanism to the intermediate tray.
Although the structure was simpler and less likely to cause paper jams, no improvements were made to the tray itself or the feeding mechanism.

That is, as shown in FIGS. 5 and 6,
Conventionally, the tray 1 is conveyed between a paper storage position and a paper delivery position by cables 5 and 6.
Since the rising portion 2' on the paper feeding side is fixed to the bottom, a mechanism is required to lift the paper 12b above the upper end of the rising portion 2' when feeding the paper at the paper feeding position.
Therefore, a bottom plate 17 is further provided on the bottom of the tray 1, and when the tray 1 reaches the paper feeding position, it is pushed up by a tongue 19 provided inside the main body of the copying machine.
A retard device including a paper feed roller, a paper feed roller, and a guide plate 20 feeds the paper 1.
He was starting to send out 2b.

As described above, conventional transport type trays require a mechanism to raise and lower the bottom plate at the paper feed position, which complicates the structure of the lower part of the copying machine.The tray itself also has a built-in bottom plate 17, which increases its weight, and the transport motor A device capable of generating a larger torque was required, which had the disadvantage of increasing the overall cost.

(Problems to be solved by the invention) By simplifying the paper feeding mechanism, the invention is lightweight and inexpensive, and can feed the paper easily and reliably, reducing the load on the transport motor. To provide a conveyance tray for an automatic double-sided copying machine that can perform the following functions.

(Means and Effects for Solving the Problems) According to the present invention, there is provided a transport type paper feed tray that temporarily stores paper that has been copied on one side and transports the paper from the paper storage position to the paper delivery position when copying the back side. By configuring the rising portion at the front end in the paper feeding direction to be rotatable, it is used as a paper stopper in the paper upright position, and tilted forward in the paper feeding position and used as a guide plate during paper feeding. This eliminates the need for a bottom plate and tongue, reduces the height of the tray, reduces the weight of the tray, and reduces the size of the motor, reducing costs.

(Example) Hereinafter, the present invention will be described based on an example with reference to FIGS. 1 to 4.

As shown in FIG. 3, a double-sided automatic copying machine 18 equipped with a transport type paper feed tray 1 according to the present invention feeds copy paper 12a from a paper feed cassette mounted on the right side of the main body to a copying mechanism by a paper feed roller 14, After single-sided copying, the sheet is ejected through the ejection roller 15 to the transport type paper feed tray 1 waiting on the left side of the main body. The ejected single-sided copied paper 12b is placed on the tray 1 via rollers 4 so as to be conveyed between the paper storage position and the paper delivery position shown in the figure by cables 5 and 6 on the guide rail 7. fall on top. Since the tray 1 is tilted at the paper storage position, the falling paper 12b stretches forward due to gravity.

A stopper/paper guide plate 2 constituting the front rising portion of the tray 1 is rotatably connected to the tray 1 by a shaft 3, as shown in FIG.
Also, as is clear from FIGS. 1 and 3, it is pulled rearward by a spring 16. Since the stopper and paper guide plate 2 stands upright due to the action of the spring 16 in the paper storage position, the single-sided copy paper 12b that is ejected from the paper ejection roller 15 and falls into the tray 1 is moved forward in the tray 1. When it leans over, it collides with stopper 2 and the front ends are aligned.

When all the sheets 12a have been single-sided copied, a transport motor (not shown) is activated to pull the cable 6, and the tray 1 is transported to the paper sending position.
When the tray 1 reaches the paper feeding position inside the right side of the main body near the paper feed cassette, the roller 4 collides with the rising portion 7a of the guide rail 7, and the tray 1 stops. Immediately before this, the downwardly projecting protrusion 2a of the stopper/paper guide 2 collides with the protrusion member 8 provided at the bottom of the copying machine 18, as shown in FIG. Then, the stopper/sheet guide 2 rotates forward as shown by the arrow, and is positioned at the same height as the sheet handling member 13, as shown in FIG. A paper feed roller 10 and a paper feed-in roller 11 are provided above the paper handling member 13 and work together with the paper feed roller 10.
Since it is retracted upward as shown in FIG. 3, it does not impede the rotation and advancement of the stopper/paper guide 2. Then, the stopper/paper guide 2 that has rotated forward collides with the stoppers 9 provided on both sides of the paper sorting device 13 and stops (fourth
(see figure).

Next, the paper feed roller 11 rotates around the axis of the paper feed roller 10, engages with the top sheet of the single-sided copied paper 12b in the transport tray 1, and feeds it out, and copying of the back side begins. The stopper 9 positions the stopper/guide plate 2 so as to be aligned with another guide plate for feeding a single-sided copy sheet into the copying mechanism.

When the transport tray 1 is empty, the tray 1 is returned to the paper storage position shown in FIG. 3 by the cable 5,
Prepare for the next copy. At this time, when the paper stopper/guide plate 2 retreats from the paper sorting device 13 and moves away from below the rollers 10, 11, the protrusion 2a separates from the protrusion 8 and gradually rises due to the action of the spring 16. The rotation of the paper stopper and guide plate 2 is controlled by the spring 16 and the protrusion 2a.
This is done automatically by the interaction of the projections 8 and 8.

(Effects of the invention) As configured as described above, the conveyance type paper feed tray of the invention has a paper stopper and paper guide that constitutes the rising portion on the front thereof, which is configured to be rotatable with respect to the tray. The interaction of springs, protrusions, and protrusions allows the tray to stand upright or tilt automatically, eliminating the need for a conventional bottom plate, a tongue for lifting it, and a guide plate at the paper feed position. In addition, the structure of the paper feed position is simplified, and the weight and height of the tray in particular are reduced, so the motor torque is also small and space can be saved.
Furthermore, in the case of the same space, it is possible to increase the number of copies.

[Brief explanation of the drawing]

FIG. 1 is a perspective view of the transport type paper feed tray of the present invention.
FIG. 2 is a perspective view of essential parts for explaining the operation at the paper feed position. FIG. 3 is a schematic side sectional view of an automatic double-sided copying machine equipped with a tray according to the present invention. FIG. 4 is a side view showing the paper feeding state of the tray according to the present invention. FIG. 5 is a perspective view of a conventional conveyance tray. FIG. 6 is a perspective view showing the paper feeding state. 1... Transport type paper feed tray, 2... Stopper and paper guide (rising portion), 2a... Protrusion, 3...
Axis, 8...protrusion.

Claims (1)

[Scope of utility model registration request] In a transport type paper feed tray that temporarily stores paper that has been copied on one side and transports the paper from the paper storage position to the paper delivery position when copying the back side, the rising portion at the front end in the paper delivery direction is configured to be rotatable,
A transport type paper feed tray, characterized in that it stands upright in a paper storage position and is used as a paper stopper, and in a paper delivery position it tilts forward and is used as a guide plate for paper delivery.