JP5337772B2 - Image forming apparatus - Google Patents

Description

  The present invention relates to an image forming apparatus.

  In recent years, energy saving has been advocated, and an image forming apparatus is not an exception, and a sleep mode is provided in which standby power is reduced by energizing only the minimum necessary functions to reduce standby power. For example, the image forming apparatus is provided with one open / close sensor for one stage of paper feed cassettes in order to detect the opening / closing of the paper feed cassette that stores recording paper. In the sleep mode, power is supplied only to the minimum necessary functions such as an engine board, which is a control circuit including an open / close sensor and a CPU (Central Processing Unit) to which a detection result from the open / close sensor is input. This saves energy. For example, Patent Document 1 below discloses a power saving method using such a sleep mode.

JP 2008-216829 A

  However, in the above prior art, it is necessary to energize the open / close sensor of each paper feed cassette in order to detect the open / close of each of the plurality of paper feed cassettes. Power consumption will increase. In addition, in an optional paper feed cassette device mounted as an optional device on the main body of the image forming apparatus, a control circuit having a CPU (Central Processing Unit) for controlling the optional paper feed cassette device separately from the main body device And an engine board having a CPU (Central Processing Unit) separately from the main body apparatus, and the CPU controls the operation of the optional paper feed cassette apparatus based on serial communication with the main body apparatus. As described above, in order to return from the sleep mode by opening / closing the paper cassette in the optional paper cassette apparatus, it is necessary to energize the engine board of the optional paper cassette apparatus together with the control circuit of the main body apparatus. is there. For this reason, the optional sheet cassette apparatus needs to supply power to the engine board and the open / close sensor even in the sleep mode. As described above, the conventional technique has a problem that the power consumption increases even in the sleep mode for detecting the opening / closing of the paper feed cassette.

  The present invention has been made in view of the above-described circumstances, and an object thereof is to suppress power consumption necessary for detection of opening / closing of a paper feed cassette in a sleep mode.

  In order to achieve the above object, according to the present invention, as a first solving means relating to an image forming apparatus, an image forming apparatus comprising a plurality of paper feed cassettes that accommodate recording paper and that can be opened and closed by insertion and removal, A vibration sensor that outputs a detection signal corresponding to a vibration pattern; and an open / close detection unit that detects opening / closing of the paper feed cassette based on a detection result of the vibration sensor. The opening / closing detection means identifies the vibrations of the plurality of paper feed cassettes based on the detection signal of the vibration sensor, and detects the opened / closed paper feed cassettes based on the vibration. Adopt the means.

  In the present invention, as a second solving means relating to the image forming apparatus, in the first solving means, a convex portion is provided on one surface of the engaging surface of the guide rail of the sheet feeding cassette, and the other surface is provided on the other surface. A means is provided in which a concave portion is provided, a convex portion and a concave portion having a different pattern for each of the plurality of paper feeding cassettes are provided, and the convex portion is fitted into the concave portion when the paper feeding cassette is inserted and removed.

  According to the present invention, as a third solving means relating to the image forming apparatus, in the second solving means, the predetermined surface of the engagement surface of the guide rail of the sheet feeding cassette may be on the pulling direction side or the inserting direction side of the convex portion. A second convex portion that generates a second vibration having a pattern different from the vibration of the pattern (first vibration) is provided, and the open / close detection means is in accordance with the order of the first vibration and the second vibration. Then, a means of distinguishing between open and closed is adopted.

  According to the present invention, the open / close detection unit identifies vibrations of the plurality of paper feed cassettes based on a detection signal of the vibration sensor, and identifies a paper feed cassette that has been opened and closed. In this way, by detecting the opening / closing of the sheet cassette based on the detection result of the vibration sensor, it is not necessary to provide an opening / closing sensor at each stage of the sheet feeding cassette. Can be suppressed. Further, when the optional paper cassette apparatus is installed, conventionally, it is necessary to supply power to the control circuit and the open / close sensor of the optional paper cassette apparatus in the sleep mode. When the main body device is equipped with a vibration sensor, it is not necessary to provide a vibration sensor in the optional paper feed cassette device, and furthermore, it is possible to suppress power required for the open / close sensor and control circuit of the optional paper feed cassette device.

1 is a front view illustrating an external configuration of a multifunction peripheral A according to an embodiment of the present invention. FIG. 3 is a functional block diagram of a multifunction peripheral A according to an embodiment of the present invention. FIG. 3 is a diagram illustrating a first paper feed cassette 51, a second paper feed cassette 52, a third paper feed cassette 21, and a fourth paper feed cassette 22 of the multifunction peripheral A according to the embodiment of the present invention. It is a figure which shows the modification of the guide rail 51a of the 1st paper feed cassette 51 of the multifunctional machine A which concerns on embodiment of this invention.

Embodiments of the present invention will be described below with reference to the drawings.
The multifunction peripheral (image forming apparatus) A according to the present embodiment has a copy function, a print function, a scan function, a facsimile transmission / reception function, and an e-mail transmission function. As shown in FIGS. 1 and 2, the multi-function peripheral A includes a main body apparatus A1 that executes image forming processing and an optional paper feed cassette apparatus A2 that supplies recording paper to the main body apparatus A1.

  The main body apparatus executes image forming processing as main processing. As shown in FIG. 2, the operation display unit 1, the image reading unit 2, the image data storage unit 3, the image processing unit 4, paper conveyance / images are performed. A forming unit 5, a communication unit 6, a main body side communication I / F unit 7, a power source 8, a vibration sensor 9, and a main control unit 10 are provided. The main control unit 10 is an open / close detection unit in the present embodiment.

The operation display unit 1 includes operation keys and a touch panel, and functions as a man-machine interface that associates the user with the multifunction device A. The operation display unit 1 outputs an operation instruction for each pressed operation key to the main control unit 10 and displays various screens on the touch panel based on a control signal from the main control unit 10.
The image reading unit 2 is a document automatically fed by a DP (Document Processor: automatic document feeder) based on a control signal input from the main control unit 10 or an image of a document placed on a platen glass (original document). The image) is read by the line sensor and converted into document image data, and the document image data is output to the image data storage unit 3.

  The image data storage unit 3 is a semiconductor memory or a hard disk device or the like, and receives document image data, print image data, and facsimile image data (received by the communication unit 6 from the outside) based on a control signal input from the main control unit 10. The image data is stored and read out and output to the image processing unit 4.

  The image processing unit 4 performs various types of image processing (for example, image processing corresponding to enlargement / reduction copying) on the image data input from the image data storage unit 3 based on a control signal input from the main control unit 10. At the same time, the image data is converted into image data in an image forming format and output to the paper transport / image forming unit 5. When the image reading unit 2 reads a color original, the image data input from the image data storage unit 3 to the image processing unit 4 is RGB image data (color image data) corresponding to the three primary colors of light. Reference numeral 4 denotes image data corresponding to the image forming format using such RGB image data, for example, YMCK image data, that is, an image using Y (yellow), M (magenta), C (cyan), and K (black) as reference colors. The data is converted and output to the paper transport / image forming unit 5.

 As shown in FIGS. 1 and 2, the paper transport / image forming unit 5 includes a first paper feed cassette 51 and a second paper feed cassette 52 that store recording paper of a predetermined paper type, and a print engine (photosensitive drum, A charger, a developing device, a fixing roller, and the like), a paper feed roller, a paper discharge roller, and the like. The paper transport / image forming unit 5 transports the recording paper by the paper feed roller based on the control signal of the main control unit 10, and transfers and fixes the image based on the image data input from the image processing unit 4 to the recording paper. The recording paper is discharged out of the apparatus by a paper discharge roller.

 As shown in FIG. 3, the first paper feed cassette 51 is provided with a convex portion 513 on the surface on the recording paper storage portion 512 side on the engagement surface of the guide rail 511 that guides insertion / removal when opening and closing, and a receiving portion 514. Two recesses 515 are provided on the side surface, and the projection 513 fits into the recess 515 during insertion and removal to generate vibration.

  The second paper feed cassette 52 is provided with a convex portion 523 on the surface of the recording paper accommodating portion 522 side on the engaging surface of the guide rail 521 that guides insertion / removal when opening and closing, and a concave portion 525 on the surface on the receiving portion 524 side. Is provided. Unlike the first paper feed cassette 51, the second paper feed cassette 52 is provided with two pairs of concave portions 525, each having two consecutive concave portions 525, and the convex portion 523 fits into the concave portion 525 during insertion and removal. As a result, the first sheet feeding cassette 51 is configured to generate a vibration having a different pattern.

  The communication unit 6 communicates with an external multifunction device, a facsimile machine, a client computer or the like using a LAN (Local Area Network) or a telephone line based on a control signal from the main control unit 10. That is, the communication unit 6 has both a communication function conforming to a LAN standard such as Ethernet (registered trademark) and a communication function conforming to a facsimile standard such as G3. The communication unit 6 can perform e-mail transmission or facsimile transmission / reception, for example.

The main body side communication I / F unit 7 is an interface that communicates with the optional paper feed cassette device A2 based on a control signal input from the main control unit 10, and the optional paper feed cassette device A2 via a serial cable. Connected with.
Based on a control signal input from the main control unit 10, the power supply 8 supplies electric power taken from the outside to the main body apparatus A 1 and the optional sheet feeding cassette apparatus A 2.
As shown in FIG. 1, the vibration sensor 9 is provided so as to be in contact with the first sheet feeding cassette 51 inside the main body apparatus A1, and detects vibration generated in the main body apparatus A1 and the optional sheet feeding cassette apparatus A2. Yes, a detection signal corresponding to the vibration pattern of the multifunction device A is output to the main control unit 10. This vibration sensor 9 is, for example, an acceleration sensor.

  The main control unit 10 includes a central processing unit (CPU), a read only memory (ROM), a random access memory (RAM), the operation display unit 1, an image reading unit 2, an image data storage unit 3, an image processing unit 4, and a sheet. An interface circuit for inputting / outputting signals to / from the conveyance / image forming unit 5, the communication unit 6, and the main body side communication I / F unit 7, and the like. From the control program stored in the ROM and the operation display unit 1 Based on the input operation instruction, the overall operation of the multifunction device A is controlled. Note that the control program stored in the ROM includes a failure handling program, and the main control unit 10 performs processing based on this failure handling program when detecting a failure of the optional sheet cassette apparatus A2. Run. The details of the processing executed by the main control unit 10 will be described as the operation of the multifunction device A below.

  The optional paper feed cassette device A2 is a detachable optional device that accommodates recording paper to be transported to the paper transport / image forming unit 5. As shown in FIG. 1, the optional paper feed cassette device A2 includes a third paper feed cassette 21, a fourth paper feed cassette 22, a device-side communication I / F unit 23, and a paper feed cassette control unit 24.

  The third paper feed cassette 21 is provided with a convex portion 213 on the surface on the recording paper accommodating portion 212 side on the engagement surface of the guide rail 211 that guides insertion / removal when opening and closing, and a concave portion 215 on the surface on the receiving portion 214 side. Is provided. Unlike the first paper feed cassette 51 and the second paper feed cassette 52, the third paper feed cassette 21 is provided with three pairs of concave portions 215, each having two consecutive concave portions 215. When the portion 213 is fitted into the recess 215, the first sheet cassette 51 and the second sheet cassette 52 generate different vibration patterns.

  The fourth paper feed cassette 22 is provided with a convex portion 223 on the surface of the recording paper accommodating portion 222 side on the engaging surface of the guide rail 221 that guides insertion / removal when opening and closing, and a concave portion 225 on the surface on the receiving portion 224 side. Is provided. Unlike the first paper feed cassette 51, the second paper feed cassette 52, and the third paper feed cassette 21, the fourth paper feed cassette 22 is provided with four pairs of concave portions 225, with two consecutive concave portions 225 as a pair. In the insertion / removal, the convex portion 223 is fitted into the concave portion 225 to generate a vibration having a different pattern from that of the first paper feeding cassette 51, the second paper feeding cassette 52, and the third paper feeding cassette 21.

  The device-side communication I / F unit 23 is an interface for performing communication with the main body device A1 based on a control signal input from the paper feed cassette control unit 24, and the main body side communication of the main body device A1 by a serial cable. It is connected to the I / F unit 7.

  The paper feed cassette control unit 24 includes a CPU, a ROM, a RAM, an interface circuit for inputting / outputting signals to / from the third paper feed cassette 21, the fourth paper feed cassette 22, and the device side communication I / F unit 23. Based on the control program stored in the ROM and the control signal input from the main control unit 10 via the device-side communication I / F unit 23, the overall operation of the optional sheet cassette apparatus A2 is controlled.

Next, the operation of the MFP A according to the present embodiment configured as described above will be described in detail.
In the multifunction device A, the main control unit 10 sets the entire multifunction device A to the sleep mode when the operation display unit 1 is not operated by the user for a predetermined time. That is, the main control unit 10 is a unit other than the operation display unit 1, the vibration sensor 9, and the main control unit 10, that is, the image reading unit 2, the image data storage unit 3, the image processing unit 4, and the paper transport / image forming unit 5. Then, the power source 8 stops the energization of the communication unit 6, the main body side communication I / F unit 7, and the optional sheet feeding cassette apparatus A2. In the sleep mode, the main control unit 10 receives an operation instruction from the operation display unit 1 or the first paper feed cassette 51 and the second paper feed cassette 52, the third paper feed cassette 21 of the optional paper feed cassette device A2, and The sleep mode is maintained until the fourth paper feed cassette 22 is opened and closed.

  When the first paper feeding cassette 51 is opened / closed by insertion / removal after entering the sleep mode, the convex portion 513 fits into the concave portion 515 to generate a predetermined pattern of vibration. Further, when the second paper feed cassette 52 is opened and closed by insertion / removal, a vibration having a pattern different from that of the first paper feed cassette 51 is generated. Further, when the third paper feed cassette 21 is opened and closed by insertion / removal, vibration of a pattern different from that of the first paper feed cassette 51 and the second paper feed cassette 52 is generated. Further, when the fourth paper feed cassette 22 is opened and closed by insertion / removal, vibrations of a different pattern from the first paper feed cassette 51, the second paper feed cassette 52, and the third paper feed cassette 21 are generated. When the vibration sensor 9 detects vibration generated by opening / closing of the first paper feed cassette 51, the second paper feed cassette 52, the third paper feed cassette 21, or the fourth paper feed cassette 22, the vibration sensor 9 generates a detection signal corresponding to the vibration pattern. Output to the main control unit 10.

  When the detection signal is input from the vibration sensor 9, the main control unit 10 identifies vibration based on the detection signal, and the first paper feed cassette 51, the second paper feed cassette 52, the third paper feed cassette 21, and the first paper feed cassette 21. Which of the four paper feed cassettes 22 is opened and closed is detected based on the vibration. When the main control unit 10 detects that any of the first paper feed cassette 51, the second paper feed cassette 52, the third paper feed cassette 21, and the fourth paper feed cassette 22 is opened and closed, the main control unit 10 sets the multifunction peripheral A to the sleep mode. Return from. That is, the main control unit 10 includes an image reading unit 2, an image data storage unit 3, an image processing unit 4, a paper transport / image forming unit 5, a communication unit 6, a main body side communication I / F unit 7, and an optional paper feed cassette. The power supply 8 is started to supply power to the device A2.

  As described above, in the MFP A according to the present embodiment, the main control unit 10 identifies the vibration pattern based on the detection signal of the vibration sensor, and detects the opened / closed sheet cassette based on the vibration pattern. . When vibration of a predetermined pattern is detected based on the detection result of the vibration sensor 9, it is detected that one of the first paper feed cassette 51, the second paper feed cassette 52, and the third paper feed cassette 21 is opened and closed. Thus, the first paper feed cassette 51 is detected by detecting the opening and closing of the first paper feed cassette 51, the second paper feed cassette 52, and the third paper feed cassette 21 based on the detection result of the vibration sensor 9. Since it is not necessary to provide an open / close sensor at each stage of the second paper feed cassette 52, the third paper feed cassette 21, and the fourth paper feed cassette 22, the power required for each open / close sensor can be suppressed. Further, in the optional sheet feeding cassette apparatus A2, conventionally, it is necessary to supply power to the sheet feeding cassette control unit 24 in the sleep mode, but the power necessary for the sheet feeding cassette control unit 24 can be suppressed. .

As mentioned above, although one Embodiment of this invention was described, this invention is not limited to the said embodiment, For example, the following modifications can be considered.
(1) In the above embodiment, the first paper feed cassette 51, the second paper feed cassette 52, the third paper feed cassette 21, and the fourth paper feed cassette 22 are not distinguished from being opened and closed. The present invention is not limited to this.
For example, as shown in FIG. 4, by providing a second concave portion 516 having a concavo-convex surface on the front side of the first paper feed cassette 51, that is, the drawing direction side, vibration generated by the convex portion 513 and the concave portion 515 (first Vibration (second vibration) different from (vibration) is generated. When the main control unit 10 detects the first vibration after detecting the second vibration, the main control unit 10 detects opening, detects the first vibration, and then detects the second vibration. May detect closing. When the second recess 516 is provided on the insertion direction side, the main control unit 10 detects that the first vibration is detected after detecting the second vibration, and detects that the second recess 516 is closed. When the second vibration is detected after the first vibration is detected, the opening is detected. Similarly, the second paper feed cassette 52, the third paper feed cassette 21, and the fourth paper feed cassette 22 may be configured as described above.

(2) In the above embodiment, the first paper feed cassette 51, the second paper feed cassette 52, the third paper feed cassette 21, and the fourth paper feed cassette 22 are provided with convex portions, and the respective receiving portions 514 are provided with concave portions. However, the present invention is not limited to this.
For example, in the first paper feed cassette 51, a concave portion may be provided on the surface on the recording paper storage portion 512 side, and a convex portion may be provided on the surface on the receiving portion 514 side. A convex portion may be provided on the surface of the accommodating portion 512 and the surface of the accommodating portion 512 on the receiving portion 514 side, and the projections may come into contact with each other during insertion and removal to generate a predetermined pattern of vibration. Similarly, the second paper feed cassette 52, the third paper feed cassette 21, and the fourth paper feed cassette 22 may be configured as described above.

A ... MFP, A1 ... Main unit, A2 ... Optional paper feed cassette device, 1 ... Operation display unit, 2 ... Image reading unit, 3 ... Image data storage unit, 4 ... Image processing unit, 5 ... Paper transport / image formation 51, first paper cassette, 511, guide rail, 512, housing portion, 513, convex portion, 514, receiving portion, 515, concave portion, 516, second concave portion, 52, second paper cassette, 521,. Guide rail, 522 ... receiving portion, 523 ... convex portion, 524 ... receiving portion, 525 ... concave portion, 6 ... communication portion, 7 ... main body side communication I / F portion, 8 ... power source, 9 ... vibration sensor, 10 ... main control 21, the third paper feed cassette, 211, the guide rail, 212, the receiving portion, 213, the convex portion, 214, the receiving portion, 215, the concave portion, 22, the fourth paper feed cassette, 221, the guide rail, 222, the housing. Part, 223 ... convex part, 224 ... receiving part, 2 5 ... recess, 23 ... apparatus side communication I / F unit, 24 ... sheet cassette control unit

Claims (3)

An image forming apparatus comprising a plurality of paper feed cassettes that contain recording paper and can be opened and closed by insertion and removal,
A vibration sensor that outputs a detection signal corresponding to the vibration pattern;
Open / close detecting means for detecting opening / closing of the paper feed cassette based on the detection result of the vibration sensor;
The plurality of paper feeding cassettes generate vibrations of different predetermined patterns when opening and closing,
The image forming apparatus, wherein the open / close detection unit identifies vibrations of the plurality of paper feed cassettes based on a detection signal of the vibration sensor, and detects opened / closed paper feed cassettes based on the vibrations. In the engagement surface of the guide rail of the paper feed cassette, a convex portion is provided on one surface, a concave portion is provided on the other surface, and each of the plurality of paper feed cassettes is provided with a different number of concave portions, The image forming apparatus according to claim 1, wherein the vibration is generated by fitting the convex portion into the concave portion when the paper cassette is inserted and removed. A second vibration that generates a second vibration having a pattern different from the vibration (first vibration) of the predetermined pattern on the pulling direction side or the insertion direction side of the convex portion on the engagement surface of the guide rail of the paper feed cassette. a concave portion is provided,
The image forming apparatus according to claim 2, wherein the open / close detection unit identifies open and closed in accordance with an order of the first vibration and the second vibration.

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