JPS61162432A - Paper feed device - Google Patents

Abstract

PURPOSE:To isolate copying paper sheets from moisture when they are unused, and to maintain the quality of the copying paper sheets for a long time by sealingly closing cassette casing when no copying operation is taken. CONSTITUTION:When a power source in a copying machine body is turned on and an original copy is set and when a copying operation button is turned on, a control means causes the rod 17 of a plunger 16 to extend so that a projection 11 of a slide roller 10 is hooked to a half blanking hole 12 in an upper cover 9, Further, the roller 10 is rotated to move the upper cover 9 leftward, and the upper cover 9 is topped at a position where a magnet 23 attached to the upper cover 9 faces a sensor 21. Then a paper feed roller 8 lowers, and is rotated counterclockwise to carry out copying operation. After completion of the copying operation the roller 8 is returned to the position indicated with the chain line, and the roller 10 is rotated counterclockwise. When the magnet 23 faces a sensor 20, the rod 17 is retracted to lift up the roller 10. Accordingly, the paper feed port is opened only upon copying operation, the quality of paper sheets may be maintained.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of the Invention The present invention relates to a paper supply device that prevents deterioration in the quality of copy paper stored in a paper supply cassette case that is detachably attached to a copying machine.

Conventional technology In general, in a high humidity environment, if the paper feed port formed in the paper cassette case is left open, the copy paper stored in the paper cassette case will absorb moisture and become damaged. quality will deteriorate.

Therefore, conventional paper feed cassette cases are equipped with a lid that can be slid open and closed at the upper opening of the cassette case body, and when the cassette case body is attached to the copying machine body, the lid moves to feed the paper. It has been proposed to form an opening and close the paper feed opening with a lid when the cassette case body is removed from the copying machine body (Japanese Utility Model Publication No. 58-7148).

To explain this paper feed cassette case, when the cassette case body is inserted into the copying machine, the paper feed opening formed in the cassette case body is opened, and conversely, when the cassette case body is pulled out from the copying machine body, the paper feed opening formed in the cassette case body is opened. I try to close the paper feed slot.

However, according to this conventional paper feed cassette case, the paper feed opening is formed in the cassette case when the cassette case body is attached to the copying machine body, so even when the copying operation is stopped in the copying machine However, there have been problems in that dust in the outside air enters through the paper feed port and light is directly irradiated onto the copy paper, resulting in deterioration of copy quality.

An object of the present invention is to solve the above problems, namely, to automatically open the paper feed slot of the paper cassette case when performing a copying operation, and automatically open the top cover of the cassette case during non-copying operations. By closing the cassette case, the original good quality of the copy paper is maintained by preventing outside air from directly contacting the copy paper inside the cassette case.

Means for Solving the Same Point To this end, the paper supply device of the present invention provides a paper feed cassette case that supplies paper to the copying machine main body with a top cover for opening and closing the paper feed port, and drives the top cover to the copying machine main body. The copier main body is provided with means for detecting the position of the top cover and a means for detecting the position of the top cover, and a control unit for operating the drive unit based on the detected top cover position signal.

The paper cassette case body is detachably attached to the copying machine body, and the upper opening of the paper cassette case body is provided with a freely movable top cover that opens and closes the lid by driving both sides thereof. . For example, it is desirable to use a flexible shutter-type upper lid that can be moved in and out according to the shape of the cassette case body.

Operation When the main body of the paper feed cassette case is inserted into the main body of the copying machine with the lid closed and the copy operation button of the copying machine is turned on, the top lid is opened by the operation of the driving means. When the upper lid position detection means detects that the paper feed opening has reached a predetermined opening width, the opening operation of the upper lid is stopped at that position.

Next, the copy paper in the paper feed cassette case body is transferred to the copying machine main body through this paper feed port, and a predetermined copying operation is started within the copying machine main body.

When the copying machine finishes the copying operation, the control means detects this and operates the drive means to move the top cover, thereby closing the paper feed port.

In this way, even if the cassette case is inserted into the copying machine, the top cover closes and the cassette case remains sealed until the copy operation button is pressed, and then until the cassette case is removed from the copying machine. Keep sealed.

Example Embodiments of the present invention will be described below based on the drawings.

As shown in FIGS. 1 to 3, a side plate 2 for positioning both sides of copy paper 3 is provided inside the paper cassette case body 1, and a fulcrum a is located at the front end (right end) of this side plate 2. A peeling claw 5 for peeling off the copy paper is attached to rotate around . The middle plate 6 on which the copy paper 3 is loaded is designed to rotate around a fulcrum, and when the cassette is attached to the copying machine body, a spring 7 is applied.
The urging force pushes up the copy paper 3 and presses it against a paper feed roller 8, which will be described later.

A bellows-shaped upper lid 9 is attached from the rear upper end of the cassette case body 1.
can move in and out of the cassette case main body 1 in the front and rear directions (in the left and right directions in the figure). The upper lid 9 is of a sliding type in which vertically long flexible plates extending in the width direction of the cassette case body 1 are connected in the front and back direction with respect to the cassette case body 1, and approximately in the center of each plate is a A half-open hole 12 is provided for hooking a protrusion 11 formed on the outer periphery of the slide roller 10. When the handle 13 provided on the plate at the front end of the upper M9 is fully opened in the rear direction (to the left in the figure) with respect to the cassette case body 1, the copy paper 3 can be freely taken in and out of the cassette case body 1. is now possible.

Note that 15 is a magnet for rotating the middle plate 6 clockwise and attracting the copy paper 3 to the lowest position.

The copying machine main body (not shown) is provided with a paper feed roller 8 that directly contacts the copy paper inside the cassette case main body 1 and supplies it into the copying machine main body. A plunger 16 is attached that is driven to hook into the hole 12. When the rod 17 of the plunger 16 is extended, the lever 18 rotates around the fulcrum C, and the protrusion 11 of the slide roller 10, which is rotatably supported at the tip of the lever 18, moves onto the upper lid 1.
It fits into the half punched hole 12 of No. 1. The slide roller 11 is rotated in a predetermined direction in response to a command from a control means provided in the main body of the copying machine, and the top cover 9 is opened and closed in a predetermined direction.

A cassette mounting section (not shown) of the copying machine main body into which the cassette case main body 1 is mounted is provided with top lid position sensors 20 and 21 for detecting the position of the top lid 9, and 20 of them serve as a copy paper path from the cassette case to the copying machine. The closed position of the paper feed port is detected, and the method 21 is to detect the open position of the paper feed port. These top lid position sensors 20.2
A magnet 23 that sends a magnetic signal to the top cover sensor 2 is attached to the side edge of the frontmost plate of the top cover 9 when the paper feed port is closed or opened.
0 or 21.

The output signals of the upper lid position sensors 20 and 21 are sent to a control means (not shown) provided in the copying machine main body, which sends a rod extension/contraction signal to the plunger 16 in response to the copying operation in the copying machine main body, and also sends a rod extension/contraction signal to the plunger 16 as shown in FIG. The slide roller 10 interlocked with the drive shaft 25 via the joint 24 is rotated in a predetermined direction to slide the top cover 9 to open or close.

Now, assume that the cassette case body 1 is inserted into the copying machine body with the upper cover 9 of the cassette case body 1 moved to the right end in FIG. 2 to fully open the paper feed port.

When the copy operation button is turned on after the copying machine is powered on and a document is placed, the top cover position sensor 20 detects that the top cover 9 is in the fully open position, and the control means operates to close the rod 17 of the plunger 16. Extend arm 1
8, the slide roller 10 is installed in the position shown in FIG. When the protrusion 11 is hooked into the half-blanked hole 12, the drive @25,
The slide roller 10 is rotated clockwise in FIG. 1 via the joint 24, and the top cover 9 is moved to the left in the figure. When the top lid 9 opens to the open position shown in FIG. 2, the magnet 23 provided on the top lid 9 faces the top lid position sensor 21, and a paper feed opening open position signal is detected. Sent to means. The control means issues a command to a drive source (not shown) to stop the rotation of the slide roller 10 based on the upper lid open position signal.

When the top cover 9 stops at the position shown in FIG. 2, the paper feed roller 8 descends from the position shown by the dotted line in FIG. 1 to the position shown by the solid line.
When the top copy paper is pressed by this, the paper feed roller 8 is rotated counterclockwise and the copy paper is sent out through the paper feed port to the main body of the copying machine (not shown). Thereafter, a series of copying operations are performed within the copying machine main body.

When the copying operation is completed, the command from the control means causes the
Raise the paper feed roller 8 to the position indicated by the dotted line, and then
The slide roller 10 is rotated counterclockwise in FIG. 1, and when the upper lid position sensor 20 faces the magnet 23 and detects the closed position of the paper feed port, the slide roller 10 is stopped.

Then, the rod 17 contracts based on a signal sent from the control means to the plunger 16, and the arm 18 is rotated counterclockwise about the fulcrum C from the state shown in FIG. 1, and the slide roller 10 is moved upward from the upper M9. be separated.

In this way, the paper feed port of the paper feed cassette case communicating with the main body of the copying machine is opened only while the copying machine is performing a copying operation, and the upper cover 9 is closed during non-copying operations to keep the paper feed cassette case in a sealed state.

Therefore, dust floating in the atmosphere and outside air will not enter the inside of the cassette case, and the copy paper inside the cassette will not absorb moisture from the outside air and deteriorate its quality.

When replenishing the paper cassette case with copy paper, remove the cassette case body from the copying machine body, manually grasp the handle 13, and slide the top cover 9 from the state shown in Figure 2 to the left end. New copy paper may be inserted onto the middle plate 6 from the upper opening of the opened cassette case main body.

Please note that when installing the paper cassette case into the copier,
When the magnet 23 of the top cover 9 does not face either of the top cover position sensors 20 and 21, a display means or an alarm that emits a warning sound may be attached to the main body of the copier to notify the operator of this fact. It is possible.

DETAILED DESCRIPTION OF THE INVENTION According to the present invention, by sealing the cassette case when the copy paper in the paper cassette case is not in use, it is possible to prevent quality deterioration of the copy paper due to water content, etc. This not only improves the moisture resistance of the paper cassette case, especially in high-humidity environments, but also eliminates the troublesome manual work of manually opening the top cover each time you install the cassette case into the copying machine. This has the effect of reducing the labor burden on the operator.

In the present invention, even when the paper cassette case is attached to the copying machine main body, the cassette case is completely sealed when no copying operation is performed, so copy paper is always stored when copy paper is not in use. It is isolated from moisture and can maintain good copy paper quality over a long period of time.

[Brief explanation of drawings]

FIG. 1 is a perspective side view of an embodiment of the present invention, FIG. 2 is a plan view thereof, and FIG. 3 is a perspective view of FIG. 1: Paper cassette case body 3: Copy paper 8: Paper feed roller 9: Top lid

Claims (1)

[Claims] The paper feed cassette case that supplies paper to the copying machine body is provided with a top cover that opens and closes the paper feed port, and means for driving the top cover and means for detecting the position of the top cover are attached to the copying machine body. 1. A paper supply device, characterized in that a control means for operating said drive means based on said copying machine body is built in said copying machine main body.