JPS63225048A - Image forming device - Google Patents

Abstract

PURPOSE:To simplify the operation in the paper feed trouble by automatically carrying out the resetting for the paper feed trouble state by opening an opening/closing door, in order to remove a copying paper in clogging state when no copying paper reaches the position of a switch within a prescribed time after the start of paper feed. CONSTITUTION:When feeding of copying paper sheets is started by turning-ON a paper feeding roller 32, a timer 1 is set. When a switch 21 is turned-ON before the ending of the set time of the timer 1, it is judged that the copying paper reaches the installation position of the switch 21 within a prescribed time from the start of paper feed. While, if the set time of the timer 1 terminates before the switch 21 is turned-ON, it is judged that no copying paper arrives at the prescribed position within the prescribed time. In this case, an opening/closing door 50 is opened to remove the copying paper sheet in clogging state. Therefore, the resetting for the trouble in paper feed can be carried out automatically. Therefore, the operation for the paper feed trouble can be simplified.

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial Application Field] The present invention relates to an image forming apparatus such as a copying machine, and more specifically, to simplifying a reset procedure in case of a paper feed error such as a paper jam.

[Prior Art] In copying machines and the like, paper feeding errors such as copy paper jams may occur. In such a case, the copying machine is placed in a standby state or in a power-off state. Also, to deal with this
The operator opens the swing door of the copying machine case and removes the copy paper causing the paper jam, and then operates a predetermined trouble reset switch to cancel the standby state, and
Turn on the power if necessary, and then perform the copying operation again.

Note that the paper feeding error is detected by determining, for example, a case where the copy paper does not reach a predetermined position in the oil paper path within a predetermined time from the paper feeding start time as a "paper feeding error state." There is.

[Problems to be Solved by the Invention] When a paper feeding error is detected, the copying machine is put into a standby state or a power-off state, as described above, in the same way as when other troubles occur. Therefore, in order to restart the copying operation, the operator must operate a predetermined trouble reset switch.

This is a cumbersome method for dealing with simple paper feeding errors.

The present invention aims to solve such problems.

[Means and effects for solving the problems] The present invention provides an image forming apparatus that transports a sheet of paper to an image forming means via a paper passing means and forms an image on the sheet of paper, the image forming apparatus comprising: a timer for measuring time or the elapsed time from a time having a predetermined relationship with the time; and paper passing for detecting the presence or absence of the conveyed paper as a binary state at a predetermined position of the paper passing means. a detecting means; a paper feeding error determining means for determining a paper feeding error state when paper is not detected at the predetermined position within a predetermined time from the time; an opening/closing door used when removing paper; a switching means that operates in conjunction with the opening/closing of the opening/closing door to switch the paper passage detection means on and off; and in the paper feeding error state, the switching means operates the An image forming apparatus characterized by comprising: a reset control means for canceling a paper feeding error state when the paper feeding detection means is switched on and off.

By adopting such a configuration, in the event of a paper feeding error, the rfI is used to remove jammed copy paper.
When m is opened (or closed), the paper feed error state is automatically reset. That is, the operation is simplified.

[Example] The present invention will be explained in detail below.

(Description of the copying machine main body) FIG. 1 is an explanatory diagram showing the configuration of a copying machine according to an embodiment. The illustrated copying machine is an original moving type device.

Approximately in the center of the copying machine, there are
A charger 2 that uniformly charges the photoreceptor drum 1, a developing device 3 that develops the electrostatic latent image on the photoreceptor drum 1 with toner, a transfer charger 4 that transfers the toner image on the photoreceptor drum onto copy paper, etc. An image forming section composed of the following components is disposed. Note that the photoreceptor 1 is rotationally driven in the direction of the arrow in the figure by a main motor (not shown).

Further, an optical system including an original exposure lamp 11, an original platen position detection switch 12, 13, a SELFOC lens array 14, etc. is disposed at the top of the copying machine. A reflected light image from the original image located between the switches 12 and 13 is formed on the surface of the photosensitive drum 1 via the SELFOC lens array 14, forming an electrostatic latent image on the surface of the drum 1.

Note that the original is held between the original IT table 16 and the original cover 17, and is moved by the drive motor 15 in the left-right direction in the figure together with the four original stackers 16 and the original cover 17.

Further, a paper cassette 31 for storing copy paper is disposed at the bottom of the copying machine, and the copy paper in the cassette 31 is fed out from the cassette 31 one by one by a paper feed roller 32, and the copy paper is fed out from the cassette 31 one by one by a paper feed roller 32. 33, 34, etc., and reaches between the photoreceptor drum 1 and the transfer charger 4, where the toner image is formed.

is electrostatically transferred, and then thermally pressed between a pair of fixing rollers 41 of a fixing device 40 via a pair of rollers 36 and 37, and is discharged onto a paper discharge tray 39 via a pair of discharge rollers 38.

The passing state of the copy paper is detected by paper passing detection switches 21 and 22 disposed in the paper passing path. The switches 21, 22 are reed switches that are turned on and off by contact with copy paper.

At the lower right side of the figure, there is a paper feed section cover 50, which is an opening/closing door.
It is disposed so as to be rotatable about the shaft portion 51 in the direction of the arrow in the figure. By opening the cover 50, the switch 21 is turned off as described later.

(Description of Switching Means) FIGS. 8(a), (b), and (C) are explanatory diagrams showing the configuration and operation of the switching means used in the above-mentioned copying machine, and (a)
) is a perspective view, (b) is a front view with the cover 50 removed, and (C) is a front view with the cover 50 opened.

As shown in the figure, the switch 21 includes a storage member 213 that stores the contact portion of the switch 21, and a paper detection actuator 210 that detects contact with the copy paper conveyed through the paper passage path.
The rotary wheel member 211 is arranged coaxially with respect to the storage member 213, and the receiver member 212 is integrally protruded from the side of the rotary shaft member 211.

Further, one end of an open/close detection actuator 501 that detects the open/closed state of the cover 50 is in contact with the upper surface of the receiver member 212, and the other end of the actuator 501 is in contact with the cover 50. Here, the opening/opening detection actuator 501
has a substantially U-shape, is rotatably supported by a shaft member 502, and is biased in the direction of arrow B (counterclockwise) by a spring (not shown).

The switching means functions as follows.

When the actuator 210 is pushed by copying paper (not shown) advancing from the right side of the figure and rotates in the six directions of arrows (clockwise) in the figure, the contacts of the switch 21 are closed and turned on.

Further, when the cover 50 rotates clockwise about the shaft member 51 (FIG. 1) and the left end of the cover 50 separates from the opening/opening detection actuator 501, the actuator 501
is rotated in the direction of arrow B (counterclockwise) by the spring force of the spring, and the receiver presses the member 212 downward in the figure. As a result, the rotation shaft member 211 rotates clockwise,
The contacts of the switch 21 are closed and turned on.

That is, the contacts of the switch 21 are closed and turned on when passing of copy paper is detected and when the cover 50 is opened.

(Description of Operation Panel) FIG. 2 is a plan view showing a part of the operation panel of the copying machine.

As shown in the figure, on the panel 60, there are a print key 61 for starting a copy operation, a clear/stop key 62 for instructing to clear and stop operation of I'l1, etc., an up key 63 and a down key for increasing/decreasing numerical values. key 6
4. A volume 65 for setting copy density and a segment display section 66 are arranged.

(Explanation of control part) FIG. 3 is an explanatory diagram of the configuration of the control section of the copying machine.

As shown in the figure, the control unit is mainly configured with CPLJ.

That is, the CPU receives signals from various sensors such as switches 21 and 22, and various key switches shown in FIG.
1. Signals for driving the drive motor 15, the clutch solenoid of the paper feed roller 32, the electrostatic charger 2, the transfer charger 4, etc. are output. Note that in FIG. 3, diagrams showing input/output relationships that are not directly related to the essential parts of the present invention are omitted.

(Operation Description) FIG. 4 is a main flowchart of control of the copying machine according to the embodiment.

For example, the CPU starts processing when the power is turned on,
First, initial settings are executed (8102).

In the first 11 settings, as shown in Figure 5, the paper feed error flag F
1 <8202), and various displays, modes, etc. are set to initial states (8204).

Next, in 8103, a routine timer that defines the time for one routine is started, and in 8104, input processing, display processing, and paper feeding error processing are executed. Details of 5104 will be described later.

Furthermore, if the copying machine is in the process of copying (S106:
Yes), execute various processes necessary for copy operation <8
108>, the paper feeding error detection process is executed (81
10). 5110 will be described in detail.

Thereafter, after waiting for the end of the internal timer set in step 5103 (8112>, the process returns to step 5103, and the above processes are repeatedly executed).

FIG. 6 is a flowchart showing details of 8104 in FIG.

If the paper feed error flag F1 has been reset (83
02: NO), displays the number of copies on the segment display section 66 (5310), and executes other input processing such as manual input of various keys and sensor input (8312>).

If the paper feed error flag F1 is set in 8302, rPCJ is displayed in the segment display area (paper feed error display).
3304), and also determines the state of the switch 21 <8306). As described above, the switch 21 is activated when the copy paper conveyed from the cassette 31 reaches the position of the switch 21, and when the switch 21 is opened/closed! In other words, when the paper feed error flag F1 is opened (under a paper feed error condition), the paper feed error flag F1 is reset (8308), and the paper feed error condition is released. be done.

FIG. 7 is a flowchart showing details of 8110 in FIG.

When the paper feed roller 32 is turned on and feeding of copy paper is started (8402>), timer 1 is set (8404).

If the switch 21 is turned on before the timer 1 ends (8
406: Yes), timer 1 is set to IJ7 (840B), and the paper feed error flag F1 is reset (840B).
410). This is because the copy paper reaches the location where the switch 21 is installed within a predetermined time from the paper feeding start time, and there is no paper feeding error.

Conversely, before switch 21 is turned on (8406; No)
, When timer 1 ends (8412; Yes), it is determined that the copy paper did not reach the predetermined position within the predetermined time, and a paper feeding error flag F1 is set (8414).

As described above, in the present embodiment, when the copy paper does not reach the position of the switch 21 within a predetermined time after the start of paper feeding and a paper feeding error occurs, there is a function to remove the jammed copy paper. Opening IF! Opening 50 automatically resets the misfeed condition.

[Effects] In summary, the present invention provides an image forming apparatus that automatically resets the paper feeding error state when the opening door is opened to remove the jammed copy paper when a paper feeding error occurs due to a paper jam or the like. be.

According to the present invention, as described in the embodiment, there is no need for a special reset operation in response to a paper feeding error state, and therefore,
The operation when a paper feeding error occurs is simplified.

[Brief explanation of drawings]

FIG. 1 is an explanatory diagram showing the configuration of a copying machine according to an embodiment. FIG. 2 is a plan view of the operation panel of the copying machine. FIG. 3 is an explanatory diagram of the configuration of the control section of the copying machine. FIG. 4 is a main flowchart of control of the copying machine according to the embodiment. FIG. 5 is a flowchart showing details of 8102 in FIG. Figure 6 shows 8104 in Figure 4.
2 is a flowchart showing details of the process. FIG. 7 is a flowchart showing details of 8110 in FIG. Figure 8 (
a), (b), and (c) are explanatory diagrams showing the configuration and operation of the switching means used in the copying machine, where (a) is a perspective view and (b) is a front view with the cover 50 closed. ,(C)
is a front view of the cover 50 in an open state. 32...Paper feed roller 50...Cover 21...
・Paper passing detection switch

Claims (1)

[Claims] (1) An image forming device that transports a sheet of paper to an image forming means via a sheet passing means and forms an image on the sheet, the device starting from a time when sheet transport starts or a time having a predetermined relationship with the time. a timer for measuring the elapsed time of the paper passing means; a paper passing detection means for detecting the presence or absence of the transported paper as a binary state at a predetermined position of the paper passing means; a paper feeding error determination means for determining a paper feeding error state when paper is not detected at the position; an opening/closing door installed in a case of the image forming device and used for removing paper in the event of a paper feeding error; a switching means that operates in conjunction with opening and closing and switches the paper passing detection means on and off; and when the switching means switches the paper passing detection means on and off in the paper feeding error state. An image forming apparatus comprising: a reset control means for canceling a paper feeding error state;