JPH0238241A - Sensor device of copying machine - Google Patents

Abstract

PURPOSE:To develop a plurality of sensing functions by a single sensor by arranging the single sensor in the transport passage of a paper feeding cassette device and detecting the connection state of the paper feeding cassette device, operation state, and the opening and closing state of a paper clogging processing part according to the position relation between the sensor and an actuator. CONSTITUTION:An actuator 31 installed in a paper transport passage on an opening/closing door 22 side is pushed up by a copying paper, when said paper passage, and said actuator 31 is separated from a sensor 30, and said sensor 30 is put into OFF state. Also in the case when the opening/closing door 22 is opened, the actuator 31 is separated from the sensor 30, which is put into OFF state. Further, when the clogging of copying paper is generated in the paper transport passage, the actuator 31 continues contact with the sensor 30, which is kept in ON state. Therefore, the passing of paper, clogging of paper, opening and closing of the processing door, and the connection state of a connector can be detected from the ON/OFF output of the sensor.

Description

DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention relates to a sensor device that detects the status of a paper feed cassette device such as an electrophotographic copying machine. The present invention relates to a sensor device for a copying machine that detects opening/closing, etc.

(Background of the Invention) FIG. 4 is a block diagram showing a schematic structure of an electrophotographic copying machine. In this figure, 1 is the main body of the copying machine, and 2 is an image reading section that reads an original image and exposes a drum to light. The detailed configuration of this image reading section 2 will be omitted. 3 is an image forming section for forming a read image on transfer paper. 4 is a drum on which a toner image is formed; 5 is a charging electrode that charges the drum 1 with corona discharge; and 6 is a charging electrode that erases the charges with light to prevent toner from adhering to the non-image area of the drum 1. An erasing unit (CEL); 7 is a developing device for forming a visible toner image on the electrostatic latent image formed on the surface of the drum 4; 8 is a developing device for improving toner transfer efficiency and paper separation efficiency; a pre-transfer exposure section (F'TL) that irradiates light onto the drum 1 to lower its surface potential; 9 a transfer rod that transfers the toner on the drum to paper by corona discharge; 1;
Reference numeral 0 denotes a separation electrode that separates the paper that is in close contact with the drum 4 by alternating current discharge, 11 a transfer paper transport section that transports the paper separated from the drum 4, and 12 a fixing section that fuses the toner to the paper using thermal pressure. It is. 13 is drum 4
A cleaning section 14 that removes the residual toner on the drum 1 with a blade is a pre-charging exposure device (PCL) that irradiates the entire surface of the drum 1 with light to erase the residual potential in preparation for the next copy.

Reference numeral 20 denotes a paper feed cassette device (hereinafter referred to as a blade cellar 1-module) attached to the lower part of the copying machine main body 1. Incidentally, the cassette module 20 and the copying machine main body 1 are used in a combined state. This cassette module stores a transfer paper 21, and this transfer paper 21 is sent to the main body 1 side for copying. Reference numeral 22 denotes an opening/closing door for opening when the transfer paper 21 becomes jammed. 23 is a door opening/closing detection sensor that detects whether the opening/closing 1j@22 is in an open state or a closed state, and 24 is a door opening/closing detection sensor 2 that detects the opening/closing state of m22.
This is an actuator for detecting door opening/closing to notify the door opening/closing.

The door opening/closing detection sensor 23 and the door opening/closing detection actuator 24 are mounted at positions where they do not interfere with the passage of the transfer paper 21 (for example, outside the document width). 25 is a paper jam detection sensor, and 26 is a paper jam detection actuator for transmitting the state of the paper jam to the paper jam detection sensor 25. This paper jam detection sensor 2
5 and the paper jam detection actuator 26 are
1 passes through the room.

] When there is an instruction to start the bee, the transfer paper 21 is moved to the roller 2.
The rotation of 0a feeds out one sheet at a time.

At this time, the sent-out transfer paper 21 passes through a cylindrical path in the module 20 and is sent to the copy main body 1 side. Normally, the paper jam detection sensor 25 and the paper jam detection actuator 26 are in contact (off state), but when paper is being passed, they are no longer in contact (off state). The detection result of the jam detection sensor 25 is connected to a CPU (not shown) on the copying machine main body 1 side via a connector (not shown). Therefore, if this paper jam detection sensor=25 is always on, it is determined that there is a paper jam.

Furthermore, the door opening/closing detection sensor 23 and the door opening/closing detection actuator 24 are in contact (on state) when the door is normally closed, but when the door is open, they do not come into contact (off state). . The detection result of this door opening/closing detection sensor 23 is sent to the CP on the copying machine main body 1 side via a connector (not shown).
U (not shown). Therefore, when the door opening/closing detection sensor 23 turns off, it is determined that the door is open.

The transfer paper sent to the copying machine main body 1 side is sent as shown by the broken line in the figure, and the toner image is transferred from the drum 4. and,
This toner image is fixed in the fixing section 12, and the transfer paper is discharged.

FIG. 5 is a block diagram showing the part related to the sensor in the electrical configuration of the device having this configuration. Detection outputs from the loaf opening/closing detection sensor 23 and the paper jam detection sensor 25 are transmitted to the CPU 28 via the connector 26 on the cassette module 20 side and the connector 27 on the copy grip main body 1 side.

This CPU 28 centrally controls the entire copying machine, and also detects the opening/closing of the door of the cassette module 20 and the jamming of the cassette module 20.
It's rIII. Two of the three signal lines to the CPU 20 are the door opening/closing detection sensor 23 and the paper jam detection sensor 4.
25, and the other one is for detecting the connection state of the connector.

For example, when the cassette module 20 is connected to the copying machine main body as an option, the copying machine main body needs to detect whether or not the cassette module is connected. Therefore, the CPU 28 is configured to detect the connection state of the connector and display on a display section (not shown) whether or not the option is installed.

(Problems to be Solved by the Invention) The apparatus having the configuration shown in FIGS. 4 and 5 requires a paper jam detection sensor and a door opening/closing detection sensor. Additionally, wiring for detecting the connection state of the connector is also required. As a result, three input ports of the CPU 28 had to be used.

Therefore, the number of parts and the number of wires increase, and the mounting becomes complicated.

The present invention has been made in view of the above-mentioned problems, and its purpose is to realize a sensor device for a copying machine that has a simple configuration and has the function of sensing multiple sheets using a single sensor. .

(Means for Solving the Problems) The present invention to solve the above problems is a sensor device for detecting the state of a paper feed cassette device having a paper jam removal door, the sensor device being disposed in a paper conveyance path of the paper feed cassette device. An actuator located on the side of the paper jam disposal door facing the sensor means, and an on/off output of the sensor means are connected via a connector, and the output of the sensor means is The sensor means and the actuator are configured to detect the opening/closing state of the previous opening/closing state of the paper jam removal door and the connection state of the connector by turning on/off the paper passing 9 paper jam removal door. The positional relationship is such that the output of the sensor means is reversed in other states, and depending on the positional relationship between the sensor means and the actuator, the connection state of the paper feed cassette device 9, the paper passing state, and the open/closed state of the paper jam removal door It is characterized by being configured to detect.

(Function) The detection means 2 monitors the output of the sensor means, and depending on the output state of the sensor means installed in the paper conveyance path of the paper feed cassette device, it is possible to determine whether the last paper jam was cleared or the opening/closing of the connector. Detects connection status.

(Example) Examples of the present invention will be described in detail below with reference to the drawings.

FIG. 1 is a block diagram showing the mechanical structure of the main part of an embodiment of the present invention, and FIG. 2 is a block diagram showing the electrical structure of the main part of the embodiment of the invention. 35 in these figures that have already been shown in FIGS. 4 and 5 are given the same numbers. 22
is an opening/closing door of the cassette module 20. This opening/closing door 22 is a door for handling paper jams. 22a is open/close m22
This is the central axis when rM is related. 30 is a sensor for detecting paper jam, door opening/closing, and connector connection. Reference numeral 31 denotes an actuator rotatably mounted in the paper conveyance path on the door 22 side.

When this actuator 31 pushes the sensor 30, the sensor 30 is turned on. When paper passes, the actuator 31 is pushed up by the transfer paper, and the sensor is turned off. Further, even if the opening 122 is opened, the sensor 30 is turned off.

FIG. 3 is a flowchart showing an abnormality detection routine among the operations of the apparatus of the present invention.

The operation of the apparatus of the present invention will be explained below using FIGS. 1 to 3.

The CPU 28, which is built into the copying machine and controls each part, is
During operation, an abnormality detection routine shown in FIG. 3 is executed. First, it is checked whether the output of the sensor 30 is high (H) level or low (L) level (step
). If the level is L, the display section displays that the optional cassette module 20 has been installed (step ■). Here, it is checked whether copying is in progress (step ■), and abnormality detection is performed depending on each state.

If normal, the sensor 30 is turned on by the actuator 31 except during copying, that is, during idling. Therefore, the input voltage to the CPU 28 should be at low (L) level. Therefore, the output of the sensor 30 is checked (step ■), and if the level is high, door oven processing is performed (step ■). That is, it is determined that the opening/closing door 22 is in the open state, and a display to that effect is displayed.

When the copying machine is copying, transfer paper is being sent from the cassette module 20 to the copying machine main body 1 side. At this time,
The output of the sensor 30 is supposed to change from L (before paper passing) to H (during paper passing) -> after proper paper passing). Further, the period during which the H level lasts is equal to a predetermined period A determined by the paper size. Then, when the sensor 30 is at the level 1, the paper is passed through step 1. If this time T is approximately equal to the predetermined time A, it is determined that the paper is passing normally (step 0). ). If the counted time T is a value other than A, perform door oven processing (step ■);
That is, since the opening/closing door 22 is open or there is a paper jam, this message is displayed on the display section.

As described above, one sensor can confirm the connection of the connectors 26 and 27, detect paper passage, and confirm the opening and closing of the door. Further, only one input port is required for the CPU 28.

In the above description, it is assumed that the output of the sensor 30 is detected by the program processing of the CPU (micro combi coater), but the present invention is not limited to this. That is,
It is also possible to process the output of sensor 30 with hard logic circuitry.

(Effects of the Invention) As explained in detail above, in the present invention, a single sensor is disposed on the conveyance path of the paper feed cassette device, and the output is sent to the CPU.
The state of the paper feed cassette device can be determined based on the state of the sensor's output. Therefore, a sensor device for a copying machine having multiple sensing functions can be realized with a single sensor.

[Brief explanation of the drawing]

FIG. 1 is a configuration diagram showing the mechanical configuration of the main part of an embodiment of the present invention, and FIG. 2 is an electrical configuration of the acid part of an embodiment of the present invention.
3 is a flowchart showing the operation of the present invention, FIG. 4 is a block diagram showing the configuration of a conventional multiplexer, and FIG. 5 is a diagram showing the electrical configuration of the main parts of the conventional device. 1 is a configuration diagram showing: 1... Copying machine main body 22... Opening/closing door 20...
・Cassette module 26.27...Connector 28...CPU30...
・Sensor 31... Actuator Figure 1 2E Week Procedures Wli JJE Book October 25, 1999 Display of the 5th District Case 1989 Patent Application No. 1.89719 Related to the 4th Generation Case Address Name (Name) University of Science address

Claims (1)

[Scope of Claims] A sensor device for detecting the state of a paper feed cassette device having a paper jam removal door, comprising: a sensor means disposed in a paper conveyance path of the paper feed cassette device; and a sensor device facing the sensor means. An actuator placed on the side of the paper jam removal door and the on/off output of the sensor means are connected via a connector, and depending on the on/off output of the sensor means, paper passes and the paper jam removal door is opened. and a detection means for detecting the open/close state of the door and the connection state of the connector, and the sensor means and the actuator have an output of the sensor means that is reversed between when paper passes, when the paper jam removal door is open, and in other states. Due to the positional relationship between the sensor means and the actuator,
A sensor device for a copying machine, characterized in that it is configured to detect the connection state of a paper feed cassette device, the paper feeding state, and the opening/closing state of a paper jam removal door.