JPS6322441A - Special cassette - Google Patents

Abstract

PURPOSE:To cope with various speeds of copying machines by making a first paper feed roller, a first timing roller, a first switch, a second paper feed roller, and a second switch which are provided in order on a cassette conveying passage for feeding sheets of paper to a copying machine cooperate with one another. CONSTITUTION:A first paper feed roller 22, a first timing roller 4, a first switch 45, and the driven roller 31 of a second paper feed roller 44 are provided in order on a conveying passage in a special cassette S connected to a copying machine body F. And, the second paper feed roller 44, a second switch 46, a third switch 47, and a second timing roller 48 are provided in the copying machine body F. A CPU generates a command for operating the first paper feed roller 22 when the first switch 45 is turned off and a command for operating the first timing roller 4 when the second switch 46 is changed from on to off. The second switch 46 is provided in a specific position, and when it is turned off, the first timing roller 4 is turned on to feed the next sheet of paper. The timing roller 4 is set at the maximum speed that can be estimated. Thereby, the special cassette can cope with various speeds of copying machines.

Description

[Detailed description of the invention] (a) Industrial application field This invention relates to a special cassette, and more specifically,
The present invention relates to a special cassette that is attached to a copying machine main body, stores a large amount of paper, and can sequentially supply the stocked paper to a conveyance path of the copying machine main body.

(B) Conventional technology A conventional special cassette has a first paper feed roller, a first timing roller downstream of this roller, and a first timing roller located downstream of this roller in the paper feed path of the cassette that leads to the conveyance path of the main body of the copying machine. a first switch on the downstream side, and a second switch on the upstream side of the second paper feed roller provided on the conveyance path further downstream, and further operates the first paper feed roller when the first switch is turned off; Next, when the second switch is turned from on to off, the first timing roller is actuated after a set time, and a control section is provided that instructs each roller to operate. The circumferential speed, operating timing, etc. of each roller are set (fixed) in accordance with the corresponding copying machine.

(c) Problems to be Solved by the Invention In the special cassette, since the circumferential speed and operating timing of each roller are constant as described above, the types of copying machines (main bodies) to which the special cassette can be installed are limited. In other words, it is necessary to prepare special cassettes for each copying machine with a different copying speed.

More specifically, for example, if the peripheral speed of the conveyance roller (first timing roller) in the special cassette is 360 mm/sec, the start timing of the secondary paper feeding of the special cassette (the operation timing of the first timing roller) is set to OFF of the second switch. If the second time is 100m seconds, the copiers that can handle the paper transport speed are 200+nn+/sec to 270[11m7sec,
Copy speed: 30 sheets/minute (A4> to 40 sheets/minute (A)
4).

If the speed of the main body is faster than this, the paper will not be fed in time for the main body during continuous copying, and if it is slower, the next paper will follow before the previous paper leaves the paper feed roller.

This invention was made in view of these circumstances, and one of its main purposes is to copy t1! The objective is to provide a special cassette that can accommodate a wide range of copy speeds.

(d) Means for Solving the Problems and Their Effects This invention is attached to the main body of a copying machine, stores a large amount of paper, and can sequentially supply the stocked paper to the conveyance path of the main body of the copying machine. In the special cassette, a first paper feed roller, a first timing roller on the downstream side of the first paper feed roller, and a first timing roller on the downstream side of the first paper feed roller are arranged in the paper feed path of the cassette connected to the conveyance path of the copying machine main body. a first switch on the downstream side, and a second switch on the downstream side of the second paper feed roller provided in the conveyance path further downstream, and further operates the first paper feed roller when the first switch is turned off; The special cassette is equipped with a control section that instructs each roller to operate in order to operate the first timing roller when the second switch is turned from on to off.

That is, in the present invention, by setting the position of the second switch that determines the start of operation of the first timing roller on the downstream side of the second paper feed roller of the main body of the copying machine, the timing of the first timing with the paper that physically precedes The purpose is to prevent the paper from overlapping with subsequent paper fed by the rollers, thereby creating a special cassette that can accommodate a wide range of copying speeds of the copying machine main body.

Of course, in this invention, the special cassette can be installed in a copying machine having any paper feeding speed by setting the paper feeding speed by the first timing roller so as to be adapted to the maximum paper feeding speed that can be assumed by the copying machine.

(e) Examples The present invention will be described in detail below based on examples shown in the drawings. Note that this invention is not limited to this.

First, in FIGS. 1 and 2, the special cassette S consists of a cassette body C and a coupling part for coupling to the copying machine body F. A movable elevating plate 11, a paper feeding upper/lower guide plate 26, 23 forming the paper feeding path 41, and a first guide plate 26, 23 that sequentially supplies the paper on the stomach descending plate 11 to the downstream side of the paper feeding path 41.
It mainly includes a paper feed roller 22, a downstream first timing roller 4 (driving side) 32 (driven side), and a control circuit 50.

On the other hand, in the joint part, there is a conveyance upper guide plate 3 which is a part corresponding to the "Paper normal cassette" and constitutes a paper feed path 43 that connects the paper feed path 41 and the conveyance path 42 of the copying machine main body F. ．．
Similarly, it mainly includes a B guide plate 2, a lower conveyance guide plate 29, and a second paper feed roller 31 (non-driving side).

Furthermore, in FIG. 2, the cassette main body C is inserted into the paper feed path 43 between the second paper feed roller 31 and the first timing roller 4.
The copying machine main body F has a second paper feed roller 44 (drive side) corresponding to the second paper feed roller 31 of the paper feed path 43, and a second paper feed roller 44 (drive side) on the downstream side of this paper feed roller. The second timing roller 48 (drive side) 4 via the second switch 46 of the paper feed path 43 and the third switch 47 of the conveyance path 42
It is equipped with 9.

In FIGS. 1 to 3, the control circuit 50 operates the first paper feed roller 22 after a predetermined time t1 when the first switch 45 is turned off, and then operates the first timing roller 4 when the second switch 46 is turned off from on. should be operated for a predetermined time t2 (it is possible to command each roller to operate).

On the other hand, when the third switch 47 of the copying machine body F is off, the second
Paper feed roller 44 is activated.

Here, the control circuit 50 sends a third command to each roller.
This will be explained in detail based on the drawings.

First, the copying machine body F starts copying, and the second paper feed roller 44 is turned on (To). The paper is thus fed by the second paper feed roller 44, and the second switch 46 is turned on (T1), and then the third switch 47 is turned on (T2).
. Then, when the first switch 45 is turned off from the trailing edge of the paper (T3), the first paper feed roller 22 is turned on after a time t□ set in advance with a predetermined number of pulses (T4), and is turned off after a predetermined time. (T5).

Further, the second timing roller (registration roller) 48 is turned on in synchronization with the optical system of the copying machine main body (Ts), and then the second switch 46 is turned off by the trailing edge of the paper (
At the same time, the first timing roller 4 is turned on and the next sheet is fed (T8). Since the paper feeding speed of the first timing roller 4 is preset to the maximum speed that the copying machine can assume, the special cassette S can be installed in any copying machine that is at any speed below the maximum speed that can be assumed. becomes.

According to this invention, since the position of the second switch is set at a specific location, a special cassette can be installed in a copying machine with a wide range of copy speeds, and the special cassette can be installed when replacing the copying machine. No need to replace. It also enables mass production of special cassettes, thereby reducing expenses and costs.

[Brief explanation of drawings]

FIG. 1 is a functional explanatory diagram showing one embodiment of the present invention, FIG. 2 is an explanatory diagram of the positional relationship between each roller and a switch, and FIG. 3 is a time chart of each roller and switch. S...Special cassette, F...Copier main body, 4...First timing roller, 22
...First paper feed roller, 44...Second paper feed roller, 48...Second timing roller, 45...
...First switch, 46...Second switch,
50... Control circuit.

Claims (1)

[Scope of Claims] 1. In a special cassette that is attached to the copying machine main body, stores a large amount of paper, and can sequentially supply the stocked paper to the transport path of the copying machine main body. A first paper feed roller, a first timing roller on the downstream side of this first paper feed roller, a first switch on the downstream side of this first timing roller, and a and a second switch downstream from the second paper feed roller provided on the conveyance path, and when the first switch is turned off, the first paper feed roller is operated, and then the second switch is turned from on to off. A special cassette comprising a control unit that instructs each roller to operate in order to operate the first timing roller.