JP5986908B2 - Printing device - Google Patents

Description

  The present invention relates to a printing apparatus that prints on a printing medium, and more particularly, to a printing apparatus that starts printing quickly when the power is turned on or when starting from a power saving mode.

  The stencil printing apparatus winds the stencil sheet made on a rotating drum, feeds the printing paper to the drum, and presses the supplied printing paper against the drum by a press roll while rotating the drum. Printing is performed, and the printed paper is discharged onto a paper discharge tray.

  In such a stencil printing machine, when a start-up operation such as turning on the power or returning from the power saving mode is performed, the rotation position of the drum or the fence position of the paper discharge tray is set to the initial position so that printing can be started. It is necessary to execute the initialization process to move to. Since this initialization process requires a considerable amount of time, there is a problem in that the start of printing is delayed if the initialization process is executed when a startup operation is performed.

  In Patent Document 1, in a recording apparatus having a power saving control (power saving mode) for reducing power consumption, an internal device of the recording apparatus is always monitored during the power saving control, and an operation performed by the user during the power saving control. Recording device that initializes the mechanical position and cleans the recording head when it shifts from the power saving control to the recording control only when it is determined that the initialization of the mechanical position or the cleaning of the recording head is necessary. Has been proposed.

JP 2004-345307 A

  However, since the recording apparatus described in Patent Document 1 always needs to monitor the internal device of the recording apparatus during power saving control, it consumes extra power for monitoring even during power saving control. It was. Further, since the internal devices of the recording apparatus cannot be monitored while the power is off, there is a problem that when the power is turned on, it is difficult to properly initialize and the start of printing is delayed.

  The present invention has been made in view of the above problems, and does not consume extra power during power-off or power-saving mode, and quickly prints even when the power is turned on or when starting from the power-saving mode. It is an object of the present invention to provide a printing apparatus that starts printing.

  In order to achieve the above object, the first feature of the printing apparatus according to the present invention is that, at the start of printing, a drive member that is controlled to start an operation from a preset initial position, and a position of the drive member. Detection means for detecting, storage means for storing the initial position of the drive member, initialization means for executing initialization processing for moving the drive member to the initial position, and control with reduced power consumption as stop processing A transition process to the power saving mode to be performed or a process to turn off the power is set, and as a startup process, a transition process to the printing mode for executing the printing process from the power saving mode or a process to turn on the power is set. A determination unit that determines whether the stop process or the start-up process is requested; and when the determination unit determines that the stop process is requested, the initialization unit After the initialization process is executed, the stop process is executed, and the position of the drive member detected by the detection means when the determination means determines that the activation process is requested, and the storage means And a control means for causing the initialization means to execute an initialization process when the initial position stored by is different from the initial position.

  According to a second aspect of the printing apparatus of the present invention, the detection unit irradiates the driving member with sensor light and receives transmitted light or reflected light of the irradiated sensor light, thereby the driving member. The storage means stores the light reception state detected by the detection means at the initial position of the drive member as an initial light reception state, and the control means requests the activation process by the determination means. When it is determined that the light receiving state of the driving member detected by the detecting unit is different from the initial light receiving state stored by the storage unit, the initialization unit is caused to execute initialization processing. It is in.

  A third feature of the printing apparatus according to the present invention is that, when the determination unit determines that the stop process is requested by the determination unit, the detection unit performs after the initialization process by the initialization unit. The storage means stores the detected light receiving state with respect to the driving member as the initial light receiving state.

  According to the first feature of the printing apparatus of the present invention, the control unit causes the initialization unit to execute the initialization process when the determination unit determines that the stop process is requested, and then performs the stop process. If the position of the drive member detected by the detection means differs from the initial position stored by the storage means when the determination means determines that the activation process has been requested, the initialization means initializes the initialization means. Since the process is executed, it is possible to quickly start printing even when the power is turned on or when starting from the power saving mode without consuming extra power during power off or the power saving mode.

  According to the second feature of the printing apparatus of the present invention, the control means stores the light receiving state for the driving member detected by the detection means and the storage means when it is determined that the activation process is requested. When the initial light receiving state is different, the initialization unit is caused to execute initialization processing. Therefore, even when the light receiving state at the initial position of the drive member is not constant, the initialization process is executed only when the drive member is moved during power-off or control in the power saving mode, so that Printing can be started.

  According to the third feature of the printing apparatus according to the present invention, when it is determined that the stop process is requested, the control unit applies the drive member detected by the detection unit after the initialization process is performed by the initialization unit. Since the light receiving state is stored in the storage means as the initial light receiving state, whether or not the driving member has been accurately moved even when the light receiving state detected by the detecting means when the driving member is in the initial position is not constant. Can be determined.

It is an apparatus block diagram which shows the hardware constitutions of the stencil printing apparatus which is one Embodiment of this invention. It is the perspective view which showed the paper discharge stand with which the stencil printing apparatus which is one Embodiment of this invention is provided. It is the top view which showed the paper discharge stand with which the stencil printing apparatus which is one Embodiment of this invention is provided. It is a functional block diagram which showed the functional structure of the stencil printing apparatus which concerns on one Embodiment of this invention. It is the flowchart which showed the processing flow of the stop process in the stencil printing apparatus which is one Embodiment of this invention. It is the flowchart which showed the processing flow of the starting process in the stencil printing apparatus which is one Embodiment of this invention.

  Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.

  In one embodiment of the present invention, a stencil printing apparatus will be described as an example of a printing apparatus.

<Configuration of stencil printing machine>
A configuration of a stencil printing apparatus according to an embodiment of the present invention will be described.

  FIG. 1 is an apparatus configuration diagram showing a hardware configuration of a stencil printing apparatus according to an embodiment of the present invention.

  As shown in FIG. 1, the stencil printing apparatus 1 includes a plate making unit 2, a printing unit 3, a paper feeding unit 4, a paper discharging unit 5 and a plate discharging unit 6.

  The plate making unit 2 is arranged at a position opposite to the thermal head 23, a base paper storage unit 22 that stores the rolled long stencil sheet 21, a thermal head 23 that is disposed downstream of the base paper storage unit 22, and the thermal head 23. The platen roll 24, a pair of base paper feed rolls 25 disposed downstream of the platen roll 24 and the thermal head 23, a light pulse motor 26 for rotating the platen roll 24 and the base paper feed roll 25, and a pair of A base paper cutter 27 disposed downstream of the base paper feed roll 25.

  The plate making unit 2 conveys the long stencil sheet 21 by the rotation of the platen roll 24 and the base paper feed roll 25, and each dot of the thermal head 23 based on the image data read by the image reading unit (not shown). When the heat generating element selectively generates heat, the stencil sheet 21 is thermally perforated to make a plate, and the stencil sheet 21 thus made is cut with a sheet cutter 27 to produce a stencil sheet 21 having a predetermined length.

  The printing unit 3 includes a drum 32 that rotates in the direction of arrow A in FIG. 1 by the driving force of the main motor 31, and a base paper clamp unit 33 that is provided on the outer peripheral surface of the drum 32 and clamps the front end of the stencil base paper 21. ing.

  The printing unit 3 includes a base paper confirmation sensor 34 that detects whether or not the stencil paper 21 is wound around the outer peripheral surface of the drum 32, a reference position detection sensor 35 that detects the reference position of the drum 32, and a main motor. And a rotary encoder 36 that outputs a pulse signal at a predetermined period in accordance with the rotation of 31. The rotation angle of the drum 32 can be calculated by detecting the output pulse signal of the rotary encoder 36 based on the detection output of the reference position detection sensor 35. Specifically, in the rotary encoder 36, a light shielding plate notched at a fixed interval (not shown) is fixed to the rotating shaft of the main motor 31. A light-emitting element that emits sensor light and a light-receiving element that receives sensor light emitted from the light-emitting element are provided so as to sandwich the light-shielding plate. By receiving the sensor light that has passed through the notched portion, the light receiving state is detected as “on” or “off”. Thereby, when the rotating shaft of the main motor 31 rotates, the light receiving state of the light receiving element changes at a constant cycle, and a pulse signal can be output based on this change.

  Further, the printing unit 3 includes a press roll 37 disposed at a position below the drum 32. The press roll 37 is pressed against the outer peripheral surface of the drum 32 by the driving force of the solenoid unit 38. It is configured to be able to change between a standby position separated from the outer peripheral surface. The press roll 37 is shifted from the standby position to the pressing position in synchronization with the sheet feeding operation from the sheet feeding unit 4, and is positioned at the pressing position only when the printing paper 41 passes through the lower part of the drum 32. It is positioned at the standby position.

  Then, the leading end of the stencil sheet 21 conveyed from the plate making unit 2 is clamped by the stencil sheet clamping unit 33, and the drum 32 is rotated in this clamped state, and the stencil sheet 21 is wound around the outer peripheral surface of the drum 32. Then, the printing paper 41 fed from the paper feeding unit 4 in synchronization with the rotation of the drum 32 is pressed against the stencil paper 21 wound around the drum 32 by a press roll 37, whereby the stencil paper 21 is placed on the printing paper 41. An image is printed by transferring ink from the perforations.

  The paper feed unit 4 includes a paper feed tray 42 on which the print paper 41 is stacked, primary paper feed rolls 43 and 44 that transport only the uppermost print paper 41 from the paper feed base 42, and the primary paper feed. Between the pair of secondary paper feed rolls 45 and a pair of secondary paper feed rolls 45 that convey the printing paper 41 conveyed by the rolls 43 and 44 between the drum 32 and the press roll 37 in synchronization with the rotation of the drum 32. A paper feed sensor 46 that detects whether or not the print paper 41 has been transported, and a paper presence sensor 48 that detects the print paper 41 stacked on the paper feed tray 42. The rotation of the main motor 31 is selectively transmitted to the primary paper feed rolls 43 and 44 via a paper feed clutch 47.

  The paper discharge unit 5 includes a paper separation claw 51 that separates the printed print paper 41 from the drum 32, a paper discharge roller 52 that conveys the print paper 41 separated from the drum 32 by the paper separation claw 51, and this discharge A paper discharge motor 55 that drives the paper roller, a paper jam detection sensor 53 that detects whether or not the print paper 41 passes over the paper discharge roller 52, and the print paper 41 that is discharged by the paper discharge roller 52 are provided. And a paper discharge tray 54 to be placed.

  The paper discharge roller 52 is provided with a paper discharge fan 52 a that sucks the printing paper 41 toward the paper discharge roller 52 so that the paper discharge roller 52 can discharge the print paper 41.

  The paper jam detection sensor 53 detects whether or not the printing paper 41 printed by the printing unit 3 is correctly conveyed. If the paper jam detection sensor 53 does not detect the conveyance of the printing paper 41 even after a predetermined time has elapsed after printing, it is determined that the printing paper 41 remains in the printing unit 3.

  The plate discharging unit 6 guides the leading end of the stencil sheet 21 unclamped from the outer peripheral surface of the drum 32, and transports the guided stencil sheet 21 while being peeled off from the drum 32, and this plate discharging transport. A stencil box 62 for storing the stencil sheet 21 conveyed by the means 61 and a stencil compression member 63 for pushing the stencil sheet 21 conveyed into the stencil box 62 by the stencil conveying means 61 into the stencil box 62 are provided. Have.

  FIG. 2 is a perspective view showing the paper discharge tray 54 provided in the stencil printing apparatus 1 according to an embodiment of the present invention.

  As shown in FIG. 2, the paper discharge tray 54 is disposed at a position where the printed paper 41 to be discharged falls, and a pair of side fences 103 and 104 serving as a paper discharge fence and an end fence are disposed on the paper discharge tray 54. 105 is provided. The pair of side fences 103 and 104 and the end fence 105 can be shifted between an upright position that interferes with the discharged print paper 41 and restricts the placement position and a tilt position that cannot restrict the placement position of the print paper 41. Is provided.

  Here, a position where the pair of side fences 103 and 104 tilt in the direction of the arrow Y1 in the figure and the placement position of the printing paper 41 on the paper discharge tray 54 cannot be regulated is called a tilted position. , 104 stand up in the direction of arrow Y2 in the figure and interfere with the printing paper 41 to restrict the placement position is called the standing position.

  The pair of side fences 103, 104 are provided so as to be movable in the left-right direction indicated by the arrow X1 or X2 in the figure, and the end fence 105 is provided so as to be movable in the front-rear Z1 or Z2 direction. 104 restricts the left and right edges of the discharged print paper 41, and the end fence 105 restricts the front edge of the discharged print paper 41.

  FIG. 3 is a plan view showing the paper discharge tray 54 provided in the stencil printing apparatus 1 according to an embodiment of the present invention.

  As shown in FIG. 3, a rack gear 107 that supports the side fence 103 is attached to the side fence 103 in the moving direction of the side fence 103, that is, in the X1-X2 direction. When the rotation shaft of the motor 109 rotates, the worm gear 108 attached to the rotation shaft rotates, and the rotation of the worm gear 108 moves the rack gear 107 and the side fence 103 attached to the rack gear 107 in the X1-X2 direction. To do. In addition, a home position sensor 116 that detects an initial position of the side fence 103 is provided in the vicinity of the side fence 103.

  The home position sensor 116 detects the light receiving state with respect to the side fence 103 by irradiating the side fence 103 with sensor light and receiving reflected light of the irradiated sensor light. Specifically, the position at which the side fence 103 is moved most in the X2 direction is set as the initial position, and the home position sensor 116 detects the light receiving state as “on” when the side fence 103 is at the initial position, When the side fence 103 is not in the initial position, the light receiving state is detected as “off”.

  Similarly, a rack gear 110 that supports the side fence 104 is attached to the side fence 104 in the moving direction of the side fence 104, that is, in the X1-X2 direction. When the rotation shaft of the motor 112 is rotated, the worm gear 111 attached to the rotation shaft is rotated, and the rack gear 110 and the side fence 104 attached to the rack gear 110 are moved in the X1-X2 direction by the rotation of the worm gear 111. To do. In addition, a home position sensor 117 that detects an initial position of the side fence 104 is provided in the vicinity of the side fence 104.

  The home position sensor 117 detects a light receiving state with respect to the side fence 104 by irradiating the side fence 104 with sensor light and receiving reflected light of the irradiated sensor light. Specifically, the position where the side fence 104 is moved most in the X1 direction is set as the initial position, and the home position sensor 117 detects the light receiving state as “on” when the side fence 104 is in the initial position, When the side fence 104 is not in the initial position, the light receiving state is detected as “off”.

  A rack gear 113 that supports the end fence 105 is attached to the end fence 105 in the moving direction of the end fence 105, that is, in the Z1-Z2 direction. When the rotation shaft of the motor 115 rotates, the worm gear 114 attached to the rotation shaft rotates, and the rotation of the worm gear 114 moves the rack gear 113 and the end fence 105 attached to the rack gear 113 in the Z1-Z2 direction. To do. A home position sensor 118 that detects an initial position is provided in the vicinity of the end fence 105.

  The home position sensor 118 detects the light receiving state with respect to the end fence 105 by irradiating the end fence 105 with sensor light and receiving reflected light of the irradiated sensor light. Specifically, the position where the end fence 105 is moved most in the Z1 direction is set as the initial position, and the home position sensor 118 detects the light receiving state as “on” when the end fence 105 is in the initial position, When the end fence 105 is not in the initial position, the light receiving state is detected as “off”.

  FIG. 4 is a functional configuration diagram showing a functional configuration of the stencil printing apparatus 1 according to an embodiment of the present invention.

  As shown in FIG. 4, the stencil printing apparatus 1 according to an embodiment of the present invention includes a control unit 70, a storage unit 80, a power control unit 81, an operation unit 90, a main motor 31, and a drum 32. The rotary encoder 36, the motor 109, the side fence 103, and the home position sensor 116 are provided.

  The storage unit 80 is a non-volatile storage medium, and the light reception state detected by each sensor such as the rotary encoder 36 and the home position sensor 116 at the initial position of the driving member such as the drum 32 and the side fence 103 is an initial light reception state. Remember as.

  The power control unit 81 controls power supply to the control unit 70.

  The operation unit 90 is provided on the upper part of the stencil printing apparatus 1 and includes a start key for starting plate-making and printing, a stop key for stopping plate-making and printing, and a numeric keypad for inputting the number of prints (whichever And an operation signal based on a user operation is supplied to the control unit 70.

  As described above, the main motor 31 rotates the drum 32 in the direction of arrow A in FIG. 1, and the rotary encoder 36 irradiates the light shielding plate attached to the rotating shaft of the drum 32 with the sensor light. By receiving the transmitted light or reflected light of the sensor light, the light receiving state with respect to the light shielding plate attached to the rotating shaft of the drum 32 is detected.

  As described above, the motor 109 rotates the rotation shaft to move the rack gear 110 and the side fence 103 attached to the rack gear 110 via the worm gear 111 in the X1-X2 direction. The home position sensor 116 detects the light receiving state with respect to the side fence 103 by irradiating the side fence 103 with sensor light and receiving reflected light of the irradiated sensor light. Note that the drum 32 and the side fence 103 are controlled to start operation from a preset initial position when printing is started.

  The control unit 70 performs central control of the stencil printing apparatus 1. And the control part 70 is provided with the initialization part 71, the determination part 72, and the apparatus control part 73 on the function.

  The initialization unit 71 executes an initialization process for moving a driving member that is a driving member such as the drum 32 and the side fence 103 to an initial position.

  The determination unit 72 determines whether or not a shift process to a power saving mode for performing control with reduced power consumption or a stop process that is a process of turning off the power is requested. In addition, the determination unit 72 determines whether or not a startup process that is a process of switching from the power saving mode to the print mode for executing the print process or a process of turning on the power is requested.

  If the determination unit 72 determines that the stop process is requested, the device control unit 73 causes the initialization unit 71 to execute the initialization process, and then executes the stop process.

  In addition, when the determination unit 72 determines that the activation process has been requested, the device control unit 73 differs from the light reception state for the driving member detected by each sensor and the initial light reception state stored by the storage unit 80. In this case, the initialization unit 71 is caused to execute initialization processing.

  Furthermore, when the determination unit 72 determines that the stop process is requested, the device control unit 73 sets the light reception state for the driving member detected by each sensor after the initialization unit 71 performs the initialization process as the initial light reception state. Is stored in the storage unit 80.

<Operation of Stencil Printing Apparatus 1>
Next, a stop process and a start process of the stencil printing apparatus 1 according to an embodiment of the present invention will be described below.

≪Stop processing≫
Details of the stop process in the stencil printing apparatus 1 according to an embodiment of the present invention will be described.

  FIG. 5 is a flowchart showing a processing flow of stop processing in the stencil printing apparatus 1 according to an embodiment of the present invention. Here, the stop process refers to a process for shifting to a power saving mode for performing control with reduced power consumption or a process for turning off the power.

  As illustrated in FIG. 5, the determination unit 72 determines whether or not a stop process that is a process of shifting to a power saving mode that performs control with reduced power consumption or a process of turning off the power is requested (step S <b> 101). .

  In step S101, when it is determined that the stop process is requested (YES), the initialization unit 71 executes the initialization process (step S103). For example, the initialization unit 71 rotates the main motor 31 to rotate the drum 32 to the reference position, and rotates the motor 109 to move the side fence 103 to the reference position.

  Next, the memory | storage part 80 memorize | stores the light reception state detected by each sensor in the initial position of a drive member as an initial light reception state (step S104). For example, the light reception state of the rotary encoder 36 when the main motor 31 is rotationally driven and the drum 32 reaches the reference position is stored as the initial light reception state, and the motor 109 is rotationally driven so that the side fence 103 reaches the reference position. The light receiving state of the home position sensor 116 at this time is stored as the initial light receiving state.

  Then, based on the request, the control unit 70 executes a transition process to a power saving mode for performing control with reduced power consumption or a stop process that is a process for turning off the power (step S105). Specifically, the control unit 70 performs power saving control with the power control unit 81 and the control unit 70 when shifting to the power saving mode. When the power is turned off, only the power control unit 81 is energized. Stop the power supply of the component equipment.

  As described above, when it is determined that the stop process is requested, not at the time of startup such as when the power is turned on or when the power saving mode is restored, the initialization unit 71 executes the stop process after executing the initialization process. Therefore, it is not necessary to execute the initialization process when starting up such as when the power is turned on or when recovering from the power saving mode, and printing can be started quickly.

  In addition, since the stop process is executed after storing as the initial light reception state, it is not necessary to monitor the state of each sensor during power-off or power-saving control, and extra power is required during power-off or power-saving control. Is not consumed.

≪Startup process≫
Details of the start-up process in the stencil printing apparatus 1 according to an embodiment of the present invention will be described.

  FIG. 6 is a flowchart showing a processing flow of the start-up process in the stencil printing apparatus 1 according to an embodiment of the present invention. Here, the activation process refers to a process for shifting from the power saving mode to a print mode for executing a print process or a process for turning on the power.

  As illustrated in FIG. 6, the determination unit 72 determines whether or not a start process, which is a process for switching from the power saving mode to the print mode for executing the print process or a process for turning on the power, is requested (step S <b> 201). .

  If it is determined in step S201 that the activation process has been requested (YES), the control unit 70 reads the initial light receiving state from the storage unit 80 (step S203).

  Next, each sensor such as the rotary encoder 36 and the home position sensor 116 detects the light receiving state (step S205).

  Then, the device control unit 73 determines whether or not the light reception state detected by each sensor in step S205 matches the initial light reception state read in step S203 (step S207).

  In step S207, when it is determined that the detected light reception state matches the read initial light reception state (in the case of YES), driving members such as a drum and a side fence are moved during the power saving mode or power off. In other words, since each driving member holds the initial position, the device control unit 73 executes a starting process (step S211).

  On the other hand, if it is determined in step S27 that the detected light reception state does not match the read initial light reception state (in the case of NO), the drum 32, the side fence 103, etc., during the power saving mode or power off. Since the drive members have been moved, that is, each drive member has not been maintained in the initial position, the initialization unit 71 executes an initialization process for the drive members corresponding to the light receiving states that do not match ( Step S209).

  For example, when the light reception state of the rotary encoder 36 does not match the initial light reception state, the initialization unit 71 rotates the main motor 31 to rotate the drum 32 to the reference position. If the light reception state of the home position sensor 116 does not match the initial light reception state, the initialization unit 71 rotates the motor 109 to move the side fence 103 to the reference position.

  As described above, according to the stencil printing apparatus 1 according to an embodiment of the present invention, when printing is started, the driving member such as the drum 32 and the side fence 103 that are driven from the initial position, and the driving member are moved to the initial position. It is determined whether or not an initialization unit 71 that executes initialization processing to be moved to and a transition processing to a power saving mode that performs control with reduced power consumption or a stop processing that is processing to turn off the power is requested. Since the determination unit 72 and the device control unit 73 that executes the stop process after the initialization unit 71 executes the initialization process when the determination unit 72 determines that the stop process is requested, the power source There is no need to monitor during the power-off mode or the power saving mode, and it is not necessary to execute the initialization process at the time of startup such as when the power is turned on or when the power saving mode is restored. Therefore, it is possible to quickly start printing even when starting up such as when the power is turned on or when recovering from the power saving mode without consuming extra power during the power off or power saving mode.

  In the embodiment of the present invention, the drum 32 and the side fence 103 have been described as examples of the driving member. However, the present invention is not limited to this, and the light reception of the side fence 104, the end fence 105, the paper feed table 42, and the like. Any driving member having a sensor for detecting the state may be used.

  When the driving member is in the initial position, when the light receiving state detected by the sensor is constant, the storage of the light receiving state corresponding to the target driving member in the storage unit 80 can be omitted.

  The rotary encoder 36 has a light shielding plate cut out at a fixed interval on the rotation shaft of the main motor 31. The rotary encoder 36 emits sensor light to the light shielding plate and receives the sensor light that has passed through the cutout portion. Thus, the light receiving state is detected as “ON” or “OFF”. Therefore, when the drum 32 is in the initial position, the light receiving state is not always fixed to either “ON” or “OFF”. That is, even when the drum 32 is in the initial position, the light receiving state may be “on” or may be “off”.

  Therefore, the light reception state detected by the rotary encoder 36 needs to be stored in the storage unit 80 as an initial light reception state before the stop process is executed.

  On the other hand, the home position sensor 116 detects the light receiving state as “ON” when the side fence 103 is in the initial position, and detects the light receiving state as “OFF” when the side fence 103 is not in the initial position. Therefore, when the side fence 103 is in the initial position, the light receiving state is always “on” and constant.

  For this reason, the initial light reception state detected by the home position sensor 116 is always constant, so that storage in the storage unit 80 during the stop process can be omitted. That is, the initial light receiving state may be stored in advance in the storage unit 80, or may be stored in the storage unit 80 each time as in the process of step S104 shown in FIG.

  In one embodiment of the present invention, the stencil sheet thus made is wound around a rotating drum 32, and then the printing paper is fed to the drum 32, and the supplied printing paper is pressed while rotating the drum. Although the stencil printing apparatus 1 that performs printing by press-contacting the drum 32 with the sheet 37 and discharges the printed sheet to the sheet discharge table 54 is described as an example, the present invention is not limited thereto.

  Any printing device that detects the position of the driving member with an optical sensor may be used, and may be a printing device such as an ink-jet line color printer, a serial ink-jet ink jet printer, or a laser printer that performs printing line by line. Also good.

DESCRIPTION OF SYMBOLS 1 ... Stencil printing apparatus 2 ... Plate making part 3 ... Printing part 4 ... Paper feed part 5 ... Paper discharge part 6 ... Plate discharge part 32 ... Drum 36 ... Rotary encoder 54 ... Paper discharge stand 70 ... Control part 71 ... Initialization part 72 ... Determination unit 73 ... Device control unit 80 ... Storage unit 81 ... Power control unit 90 ... Operation unit 103, 104 ... Side fence 105 ... End fence 107, 110, 113 ... Rack gear 108, 111, 114 ... Worm gear 109, 112, 115 ... Motor 116, 117, 118 ... Home position sensor

Claims (3)

A drive member that is controlled to start operation from a preset initial position at the start of printing;
Detecting means for detecting the position of the driving member;
Storage means for storing an initial position of the drive member;
Initialization means for executing an initialization process for moving the drive member to an initial position;
A transition process to a power saving mode for performing control with reduced power consumption or a process to turn off the power is set as a stop process, and a transition from the power saving mode to a print mode for executing a print process is performed as a start process. A determination means for determining whether the process or the process for turning on the power is set and the stop process or the start process is requested;
When it is determined that the stop process is requested by the determination unit, the initialization unit is caused to execute the initialization process, and then the stop process is executed, and the determination unit requests the start process. Control means for causing the initialization means to execute initialization processing when the position of the driving member detected by the detection means differs from the initial position stored by the storage means when determined;
A printing apparatus comprising: The detection means irradiates the driving member with sensor light and detects transmitted light or reflected light of the irradiated sensor light to detect a light receiving state with respect to the driving member,
The storage means stores the light receiving state detected by the detecting means at the initial position of the driving member as an initial light receiving state,
The control means includes
When the determination means determines that the activation process is requested, if the light reception state for the drive member detected by the detection means is different from the initial light reception state stored by the storage means, the initialization is performed. The printing apparatus according to claim 1, wherein an initialization process is executed by the unit. The control means includes
When it is determined by the determination means that the stop process is requested, after the initialization process is performed by the initialization means, the light reception state with respect to the driving member detected by the detection means is set as the initial light reception state. The printing apparatus according to claim 2, wherein the printing apparatus is stored.

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