JPS63171727A - Image forming device - Google Patents

Abstract

PURPOSE:To dispense with any program change in the sequence of a control circuit, by setting up both first and second sheet feeders symmetrically to a vertical conveying passage. CONSTITUTION:When a deck 10 is selected, a control circuit C commands it so as to connect a clutch which drives and connects a paper feeder select signal A and a paper feeder driving signal B to a pickup roller 11 via a gate 30a and a buffer 31a. If a start button is pressed, the pickup roller 11 gets rotating, a sheet S is fed out of the deck 10, whereby the sheet S passes through a conveying route 12 and conveyed to a resist roller pair 22 of a pair of feed rollers 13. On the other hand, when a deck 17 is selected, the control circuit C commands it so as to connect a pickup roller 15 to a driving route via a gate 30b and a buffer 31b. When the start button is pressed, the pickup roller 15 rotates, feeding the sheet S from the deck 17, and the sheet is conveyed to the resist roller pair 22 by the paired feed rollers 13 through the conveying route 12.

Description

Detailed Description of the Invention (a) Field of Industrial Application The present invention relates to an image forming apparatus such as a copying machine or a laser beam printer (hereinafter referred to as a copying machine), and more specifically, the present invention relates to an image forming apparatus such as a copying machine or a laser beam printer (hereinafter referred to as a copying machine). The present invention relates to a copying machine each equipped with a sheet feeding device and a sheet storage device.

(B) Prior Art Copying machines that can load sheets of various sizes and large quantities of regular size sheets have been known in the past.
a includes a plurality of cassettes 17a, 1 as shown in FIG.
7a and a large capacity deck 17b. Also, the third
As shown in the figure, there was also a copying machine 1b equipped with cassettes 10a, 10a and a deck 10b inside the machine.

(C) Problems to be Solved by the Invention By the way, when trying to store multiple types of sheets in the above-mentioned copiers 1a and 1b (since only one type of regular size sheet can be stored in a large amount), As shown in FIG. 4, a large deck 16' was connected to the copying machine 1c.

However, the above-mentioned copying machine IC requires a wider installation space and is 1-up, and the copying machine IC
When connecting the large deck 16' to the paper feed sequence program of the control circuit had to be changed.

(b) Means for Solving the Problems The present invention aims to solve the above-mentioned problems, and includes a first seat storage device disposed inside the aircraft, and a first seat storage device arranged inside the aircraft. In an image forming apparatus that includes a first sheet feeding device that feeds a sheet I- of the device, and a vertical conveyance path that guides the sheet fed by the first sheet feeding device, A second sheet feeding device that feeds sheets of the second sheet storage device is provided with a second sheet storage device mounted on the side of the first sheet feeding device with respect to the vertical conveyance path. It is characterized by being placed in a symmetrical position.

(E) Operation Based on the above-described configuration, when the operator selects the first sheet storage device using the input key on the operation unit of the copying machine, the first sheet feeding device feeds the sheet from the sheet storage device and images the image. It is formed.

Further, when the second sheet 1 and the storage device are selected using the input key, sheets are fed from the storage device by the second sheet feeding device. At this time, the first sheet feeding device and the second sheet feeding device
By arranging the sheet feeding device and the sheet feeding device at symmetrical positions with respect to the vertical conveyance path, there is no need to change the sequence program of the control circuit.

(f) Example Embodiments of the present invention will be described below along with the drawings.

As shown in FIG. 1, the copying machine 1 has a copying machine main body 3 in which a copying section 2 is built-in, and the main body 3 houses a document mounting table 5, a light source 6, a lens system 7, and a large number of sheets S. Deck 1
0 and a pickup roller 11 that feeds the sheet S. A conveyance path 12 for guiding the sheet to the copying section 2 is provided downstream of the pickup roller 11, and a pair of conveyance rollers 13 is disposed in a vertical portion 12a of the conveyance path 12. Further, a position 12 (=1
．． ) is provided with a pickup roller 15, and below the roller 15 is provided a deck 17 for storing a large amount of sheets 1-3. Further, the conveyance path 12 is connected to a feed path 20 for feeding manual sheets +-S from the manual feed tray 19, and the path 20 has a pair of paper feed rollers 21. A pair of registration rollers 22 for conveying the sheet S in synchronization with the image in the copying section 2 is disposed downstream of the conveyance path 12, and downstream of the pair of registration rollers 22, scraps are stored in the copying section 2. 2. A transport unit 23 that transports the sheet S, a fixing device 25 that fixes the sheet S, and a pair of discharge rollers 2 that discharges the sheet Sel to the outside of the copying machine body 3.
6 are arranged.

On the other hand, the deck 17 is formed by protruding the left upper part 17a, as shown in detail in FIG.
A groove 17b that engages with a pin 27 supported by the copying machine main body 3 to support the deck 17 is carved on the lower side of the plate.

Further, an abutment member 29 is provided at the lower left side of the deck 17.
is fixed to the deck 17, and the abutting member 29
When the deck 17 is attached to the copying machine main body 3, it comes into contact with the lower part of the copying machine main body 3 to stabilize the deck 17.

Further, the copying machine 1 has a control circuit C, as shown in FIG. and bye
The driving force is transmitted to either the pickup roller 11 or 15 via the rollers 7y 31a and 31b.

Since this embodiment has the above-described configuration, when the operator selects the deck 10 using the input key (both not shown) on the operation section of the copying machine main body 3 when making a copy using the copying machine 1, the control The circuit C connects a clutch (not shown) that connects the pickup 4-ra 11 with the drive path through the gate 30a and the buffer 31a to receive the paper feeder selection signal A and the paper feeder drive signal B. command. Next, when a start button (not shown) is pressed, the pickup roller 11 starts rotating and the sheet S is fed from the deck 10, and the sheet S is passed through the conveyance path 12 by a pair of conveyance rollers 13 to the registration rollers. Transported to pair 22.

Next, the sheet S is conveyed by a pair of registration rollers 22 in synchronization with the image in the copying section 2, and the image is copied by the copying section 2. Next, sheet S in the copying department is
It is transported to the fixing device 25 by the transport section 23, and the fixing device 25
The image is fixed thereon, and is further discharged to the outside of the copying machine main body 3 by a pair of discharge rollers 26.

On the other hand, when the operator selects the deck 17 using the input key, the control circuit C uses the paper feeder selection signal A and the paper feeder selection signal B to move the pickup roller 15 to the drive path via the gate 30b and buffer 31b. A command is given to connect a clutch (not shown) to be connected. Then,
When the start button is pressed, the pickup roller 15
rotates to feed the sheet S from the deck 17, and the sheet S is conveyed by the pair of conveying rollers 13 through the conveying path 12 to the pair of registration rollers 22. Next, the sheet S is conveyed by a pair of registration rollers 22 in synchronization with the image in the copying section 2, and the image is copied by the copying section 2. Next, the sheet S in the copying section is conveyed by the conveyance section 23 to the fixing device 25, the image is fixed by the fixing device 25, and further discharged to the outside of the copying machine main body 3 by a pair of discharge rollers 26.

In the above-described embodiment, the copying machine 1 is provided with a plurality of decks 10.17 inside the machine and outside the machine, but the present invention is not limited to this. A copying machine equipped with multiple Ω decks and capable of feeding paper in multiple stages may also be used.

(G) As described in detail, according to the present invention, there is provided a first sheet storage device disposed inside the machine, and a first sheet storage device for feeding sheets of the first sheet storage device H. In an image forming apparatus comprising a sheet 1 feeding device and a vertical conveyance path for guiding sheets fed by the first sheet feeding device, a second sheet storage device is provided outside the machine body. The second sheet feeding device that feeds the sheets of the second sheet I/storage device is arranged at a position symmetrical to the first sheet feeding device with respect to the vertical conveyance path. In addition to being able to store commonly used size sheets compactly and inexpensively,
There is no need to change the sequence program of the control circuit.

[Brief explanation of the drawing]

FIG. 1 is a front sectional view showing an image forming apparatus according to the present invention;
2 to 4 are front sectional views showing a conventional example, FIG. 5 is a block diagram showing a control circuit, and FIG. 6 is a front view showing main parts of an image forming apparatus of the present invention. DESCRIPTION OF SYMBOLS 1... Image forming apparatus, 10... First sheet storage device, 11... First sheet feeding device, 12
a... Vertical conveyance path, 15... Second sheet feeding device, 17... Second sheet storage device. Figure 5 Figure 6

Claims (2)

[Claims] (1) A first seat storage device located inside the aircraft;
An image forming apparatus comprising: a first sheet feeding device that feeds the sheets of the first sheet storage device; and a vertical conveyance path that guides the sheets fed by the first sheet feeding device. In the method, a second sheet feeding device including a second rate storage device mounted on the outside of the machine body and feeding sheets of the second sheet storage device is connected to the first sheet feeding device with respect to the vertical conveyance path. An image forming apparatus characterized in that the image forming apparatus is arranged at a symmetrical position with a sheet feeding device. (2) the first sheet storage device is a sheet storage device that stores large size sheets such as A3 and B4;
The image forming apparatus according to claim 1, wherein the second sheet storage device is a sheet storage device that stores small size sheets such as A4, LTR, and B5.