JP2012201079A - Inkjet recording apparatus - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an inkjet recording apparatus in which a conveyance unit can be moved to a position away from a head part, when a main power supply is turned off in such a state that the conveyance unit is placed in a position close to the head part.SOLUTION: The inkjet recording apparatus 1 includes: a roll member 120 winding or unwinding a wire member 130, to move the conveyance unit 30 to a recording position and a non-recording position; a motor 105 receiving the supply of a first voltage, to output a rotational drive force; a clutch part 110 whose state is changed between a transmission state where the rotational drive force from the motor 105 is transmitted to the roll member 120 and a non-transmission state where the rotational force from the motor 105 is not transmitted to the roll member 120, when a second voltage is supplied; and a clutch control part 240 controlling a secondary power supply part 210, so as to output the second voltage to the clutch part 110, when it is determined that the voltage of a primary power supply part 200 is a threshold voltage or less.

Description

  The present invention relates to an ink jet recording apparatus that performs recording on a recording medium such as paper by ejecting ink from nozzles of a head.

2. Related Art Conventionally, an ink jet recording apparatus includes a head unit having a plurality of ink ejecting nozzles that eject ink.
As an ink jet recording apparatus, a type including an elevating unit that moves the head unit up and down between a printing position P1 close to the paper conveyance unit (drum) and a non-printing position P2 separated from the paper conveyance unit has been proposed (for example, , See Patent Document 1).

JP-A-10-324007

However, in the ink jet recording apparatus of Patent Document 1, the lifting means cannot separate the head unit from the transport unit when a power failure occurs when the head unit is located at the printing position P1.
For this reason, in the ink jet recording apparatus disclosed in Patent Document 1, when a sheet is placed between the head unit and the transport unit when the main power is turned off due to a power failure or the like, the sheet is jammed (paper jam). In some cases, nozzle ink may be ejected onto jammed paper. In this case, the nozzle performance in the head portion may deteriorate.

  The present invention provides an ink jet recording apparatus capable of moving a transport unit to a position separated from the head unit when the main power supply is turned off in a state where the transport unit is positioned close to the head unit. With the goal.

  The present invention provides a primary power supply unit capable of supplying a first voltage, and a secondary power supply unit that is supplied with the first voltage from the primary power supply unit and outputs a second voltage lower than the first voltage. A head portion having a nozzle for ejecting ink; a head portion disposed vertically below the head portion; and a movably disposed recording position close to the head portion and a non-recording position spaced from the head portion. A transport unit capable of transporting the image forming material, a wire member connected to the transport unit, and arranged on the upper side in the vertical direction of the transport unit and capable of winding or feeding the wire member, A roll member that moves the transport unit to the recording position and the non-recording position by winding or unwinding, and the first voltage is supplied to move the roll member forward. A rotation driving unit capable of outputting a rotation driving force for rotating the wire member so as to wind up or pay out, a transmission state for transmitting the rotation driving force output from the rotation driving unit to the roll member, and the rotation driving unit. From the primary power supply unit, a clutch unit that can be changed to a non-transmission state in which the output rotational driving force is not transmitted to the roll member, and that changes state when the second voltage is supplied. A voltage detection unit that detects an output voltage; a determination unit that determines whether the voltage detected by the voltage detection unit is less than a threshold voltage that is smaller than the first voltage and greater than the second voltage; and A clutch control unit configured to change the state of the clutch unit by supplying the second voltage output from the secondary power source unit to the clutch unit, wherein the clutch unit is in the transmission state; When the determination unit determines that the voltage detected by the voltage detection unit is equal to or lower than the threshold voltage, the second voltage output from the secondary power supply unit is supplied to the clutch unit. And a clutch control unit that changes the state of the clutch to the non-transmission state.

  Further, it is preferable that the transport unit is located at the non-recording position or moves from the recording position to the non-recording position by its own weight when the clutch is in the non-transmission state.

  In addition, it is preferable to include a holding unit that is disposed on the lower side in the vertical direction of the transport unit positioned at the non-recording position and holds the transport unit at the non-recording position.

  In addition, it is preferable to include a damper member disposed on the lower side in the vertical direction of the transport unit.

  The present invention provides a primary power supply unit capable of supplying a first voltage, and a secondary power supply unit that is supplied with the first voltage from the primary power supply unit and outputs a second voltage lower than the first voltage. A head portion having a nozzle for ejecting ink; a head portion disposed vertically below the head portion; and a movably disposed recording position close to the head portion and a non-recording position spaced from the head portion. A transport unit capable of transporting the image forming material, and a lifting mechanism for moving the transport unit to the recording position and the non-recording position, and a moving mechanism (wire + roll member) for moving the transport unit ), A rotation drive unit capable of outputting a rotation drive force for driving the movement mechanism, a transmission state for transmitting the rotation drive force output from the rotation drive unit to the movement mechanism, and from the rotation drive unit An elevating mechanism having a clutch portion that is changeable to a non-transmitting state in which the rotational driving force to be transmitted is not transmitted to the moving mechanism and is changed when the second voltage is supplied; A voltage detection unit that detects a voltage output from the primary power supply unit, and determines whether the voltage detected by the voltage detection unit is less than a threshold voltage that is smaller than the first voltage and greater than the second voltage And a clutch control unit that changes the state of the clutch unit by supplying the second voltage output from the secondary power supply unit to the clutch unit, wherein the clutch unit is in the transmission state. When it is determined that the voltage detected by the voltage detection unit is equal to or lower than the threshold voltage by the determination unit, the second voltage output from the secondary power supply unit is supplied to the clutch unit. A clutch control unit for state change to the non-transmission state the clutch unit feed, and an ink jet recording apparatus provided with.

  According to the present invention, there is provided an ink jet recording apparatus capable of moving a transport unit to a position separated from the head portion when the main power source is turned off while the transport unit is positioned close to the head portion. can do.

1 is a longitudinal sectional view schematically showing an outline of an inkjet recording apparatus 1 from the front side. FIG. 2 is a plan view showing a peripheral portion of the recording unit 20 and the transport unit 30 in a state where a cap unit 50 is mounted corresponding to each recording head 22 in the inkjet recording apparatus 1. 2 is a schematic configuration diagram schematically illustrating a configuration of an elevating mechanism 40 in the inkjet recording apparatus 1. FIG. 2 is a schematic configuration diagram schematically illustrating a configuration of an elevating mechanism 40 in the inkjet recording apparatus 1. FIG. 2 is a functional block diagram in the inkjet recording apparatus 1. FIG. 3 is a flowchart illustrating an operation in the inkjet recording apparatus 1.

Hereinafter, embodiments of the present invention will be described with reference to the drawings.
An overview of the overall structure of the inkjet recording apparatus 1 (image forming apparatus) of this embodiment will be described with reference to FIGS.

  FIG. 1 is a longitudinal sectional view schematically showing an outline of the ink jet recording apparatus 1 from the front side. FIG. 2 is a plan view showing the periphery of the recording unit 20 and the transport unit 30 in a state where the cap unit 50 is attached to each recording head 22 in the inkjet recording apparatus 1.

  As shown in FIGS. 1 and 2, the inkjet recording apparatus 1 of the present embodiment includes a recording unit 20, a cleaning unit 25, a transport unit 30, an ink supply unit 100, and a transport unit 30 in a main body 2. An elevating mechanism 40 that elevates, a cap unit 50, a first horizontal moving mechanism (not shown) that horizontally moves the cap unit 50, and a second horizontal moving mechanism (not shown) that horizontally moves the cleaning unit 25. Prepare. The ink jet recording apparatus 1 of the present embodiment further includes a paper feed cassette 3, a paper feed roller 4, a paper transport path 5, a registration roller pair 6, a drying device 7, a paper discharge roller pair 8, and paper discharge. A mouth 9 and a paper discharge tray 10 are provided. As described above, the ink jet recording apparatus 1 of the present embodiment has various operation units.

  As shown in FIGS. 1 and 2, the transport unit 30 includes a drive roller 32, a driven roller 33, a transport belt 31 that is stretched over the drive roller 32 and the driven roller 33, and a tension that adjusts the tension of the transport belt 31. It has a roller 34 and an air suction unit (not shown) provided on the lower side of the conveying surface of the conveying belt 31 (the side opposite to the recording unit 20). A number of through holes (not shown) for suction are provided on the upper surfaces of the transport belt 31 and the air suction unit, respectively.

When the driving roller 32 and the driven roller 33 rotate counterclockwise when viewed from the front, the transport surface 31A formed by the upper surface portion of the transport belt 31 is one of the paper transport directions P in the horizontal plane (XY plane). Horizontally to the other. That is, on the conveyance surface 31 </ b> A of the conveyance belt 31, the sheet conveyance direction P substantially coincides with the horizontal direction X. The air suction unit is disposed below the conveyance surface 31A of the conveyance belt 31 (on the side opposite to the recording unit 20), and applies a suction force that attracts the paper T as a recording medium to the conveyance surface 31A of the conveyance belt 31. .
As the conveyor belt 31, a belt in which both ends are overlapped and joined to form an endless shape, a seamless belt (seamless), or the like can be used.

  As shown in FIG. 2, at the time of predetermined recording, the paper T as a recording medium is introduced onto the transport surface 31 </ b> A of the transport belt 31 from one side in the paper transport direction P. A suction force acting on the transport belt 31 is generated on the transport surface 31A through the suction through-hole (not shown) with the operation of the air suction unit (not shown). The paper T introduced onto the transport surface 31A of the transport belt 31 is attracted to the transport surface 31A by the suction force and transported toward the other side in the paper transport direction P. Thus, an image or the like is recorded on the paper T by ejecting ink from the recording head 22 of the recording unit 20 to be described later toward the paper T being transported while being attracted to the transport surface 31A of the transport belt 31. (Printed).

  As shown in FIG. 1, the paper feed cassette 3 accommodates the paper T in a stacked state, and is disposed on the upstream side of the paper transport direction P of the transport unit 30 below the inside of the main body 2. The paper feed roller 4 is disposed above the paper feed cassette 3. The paper feed roller 4 feeds the paper T toward the upper right of the paper feed cassette 3 in FIG.

  The sheet conveyance path 5, the registration roller pair 6, the recording unit 20, and the conveyance unit 30 are disposed on the downstream side in the sheet conveyance direction P of the sheet feeding cassette 3. The paper T sent out from the paper feed cassette 3 reaches the registration roller pair 6 through the paper transport path 5. The registration roller pair 6 corrects the oblique feeding of the paper T and feeds the paper T again. The leading edge of the paper T is detected by a paper leading edge detection sensor (not shown) provided in the paper conveyance path 5 between the recording unit 20 and the registration roller pair 6, and recording is performed based on the detected timing. The unit 20 performs an ink ejection operation as will be described later.

  As shown in FIG. 1, the drying device 7 is arranged on the downstream side in the paper transport direction P of the transport unit 30 above the inside of the main body 2. The drying device 7 dries the ink on the paper T after being recorded by the ink ejected by the recording unit 20.

  The paper discharge roller pair 8, the paper discharge port 9, and the paper discharge tray 10 are arranged in this order on the downstream side in the paper transport direction P of the drying device 7. The paper T, which has been dried by the drying device 7, is sent to the downstream side in the paper transport direction P by the paper discharge roller pair 8, and passes through the paper discharge port 9 to a paper discharge tray 10 provided outside the main body 2. Sent to the outside of the main body 2.

  As shown in FIGS. 1 and 2, the recording unit 20 (head unit) includes recording heads 22 (head units) corresponding to four colors. The recording heads 22 corresponding to the four colors are a black recording head 22K, a cyan recording head 22C, a magenta recording head 22M, and a yellow recording head 22Y. These four color recording heads 22K, 22C, 22M, and 22Y extend long along the paper width direction Y orthogonal to the paper transport direction P (horizontal direction X). The recording heads 22 </ b> K, 22 </ b> C, 22 </ b> M, and 22 </ b> Y are arranged in order from the upstream side to the downstream side in the paper transport direction P along the paper transport direction P of the transport belt 31.

  The four-color recording heads 22K, 22C, 22M, and 22Y have nozzle surfaces on which ink ejection nozzles are formed. The nozzle surface is the lower surface of the four color recording heads 22K, 22C, 22M, 22Y. The nozzle surfaces of the recording heads 22K, 22C, 22M, and 22Y face the conveyance surface 31A of the conveyance belt 31. The four-color recording heads 22K, 22C, 22M, and 22Y record an image on the paper T with ink ejected from the ink ejection nozzles formed on the nozzle surface.

As shown in FIG. 1, the ink supply unit 100 includes four ink tanks 23K, 23C, 23M, and 23Y, and four pump mechanisms 24K, 24C, 24M, and 24Y.
The four ink tanks 23K, 23C, 23M, and 23Y are disposed below the transport unit 30 corresponding to the four color recording heads 22K, 22C, 22M, and 22Y, respectively. The four ink tanks 23K, 23C, 23M, and 23Y contain the inks that are supplied to the four color recording heads 22K, 22C, 22M, and 22Y. Each color ink stored in the four ink tanks 23K, 23C, 23M, and 23Y is supplied to four pump mechanisms 24K, 24C, 24M, and 24Y, which will be described later. The four ink tanks 23K, 23C, 23M, and 23Y are arranged along the paper transport direction P of the transport belt 31 in order from the upstream side to the downstream side in the paper transport direction P.

The four pump mechanisms 24K, 24C, 24M, and 24Y are arranged above the transport unit 30 corresponding to the four ink tanks 23K, 23C, 23M, and 23Y, respectively. The four pump mechanisms 24K, 24C, 24M, and 24Y are arranged in order from the upstream side to the downstream side in the paper transport direction P along the paper transport direction P of the transport belt 31.
The four pump mechanisms 24K, 24C, 24M, 24Y temporarily store the inks of the respective colors stored in the four ink tanks 23K, 23C, 23M, 23Y. The inks of the respective colors accommodated in the four pump mechanisms 24K, 24C, 24M, and 24Y are supplied from the four pump mechanisms 24K, 24C, 24M, and 24Y to the recording heads 22K, 22C, 22M, and 22Y of the four colors. .

  In the following description, unless otherwise specified, the four color recording heads 22K, 22C, 22M, 22Y, the four ink tanks 23K, 23C, 23M, 23Y, and the four pump mechanisms 24K, For 24C, 24M, and 24Y, the identification symbols “K”, “C”, “M”, and “Y” are omitted, and the “recording head 22”, “ink tank 23”, and “pump mechanism” are simply omitted. 24 ”.

  Each recording head 22 of the recording unit 20 is placed on the conveyance surface 31A of the conveyance belt 31 corresponding to image data information (for example, characters, figures, patterns) received from an external computer (not shown). Four colors of ink are ejected toward the paper T. As shown in FIG. 2, each recording head 22 is supported by a rectangular plate-shaped recording head support member 21, and is fixed to the main body 2 together with the recording head support member 21. Then, with the rotational movement of the transport belt 31, four color inks are sequentially ejected from each recording head 22 at a predetermined timing, so that the four color inks of black, cyan, magenta, and yellow are superimposed on the paper T. The color ink images are printed together.

  As an ink discharge method of the recording head 22, for example, a piezo method that pushes out ink using a piezo element (not shown), or bubbles are generated by a heating element (not shown), and ink is discharged by applying pressure. Various discharge methods such as a thermal ink jet method can be adopted.

  The elevating mechanism 40 raises and lowers the transport unit 30. The lifting mechanism 40 moves the transport unit 30 up and down (moves) with respect to the recording head 22 in a direction Z (hereinafter also referred to as “vertical direction Z”) perpendicular to the horizontal plane (XY plane). The transport surface 31 </ b> A of the transport belt 31 is configured to be relatively close to or away from the nozzle surface of the recording head 22 by the movement of the transport unit 30 in the vertical direction Z by the lifting mechanism 40. That is, the elevating mechanism 40 is configured to be able to move the conveyor belt 31 between the recording position and the non-recording position. The lifting mechanism 40 will be described in detail later.

  As shown in FIG. 1, the cap unit 50 is configured to be disposed below the recording unit 20 and above the conveyance unit 30 (between the recording unit 20 and the conveyance unit 30). As shown in FIG. 2, the cap unit 50 includes a plurality of cap cases 52 provided corresponding to the respective recording heads 22 and a cap base member 53 that fixes and supports the plurality of cap cases 52 in a predetermined positional relationship. .

  The cap unit 50 is configured to be movable up and down in conjunction with the elevation of the conveyance unit 30 in a state where the cap unit 50 is disposed between the recording unit 20 and the conveyance unit 30. The cap unit 50 is separated downward from the recording head 22 by a cap unit moving mechanism (not shown).

  As a result, the cap unit 50 is detached from the recording head 22. In the state where the cap unit 50 is detached from the recording head 22, ink is ejected from an ink ejecting nozzle (not shown) on the nozzle surface of the recording head 22, so that the high-viscosity ink remaining in the nozzle is discharged. It is possible to execute a discharge recovery process, i.e., a purge, for discharging the ink and removing the ink clogging.

  Here, in a state where the cap unit 50 is disposed between the recording unit 20 and the transport unit 30, the cap unit 50 can be attached to the nozzle surface of the recording head 22. When the cap unit 50 is not disposed between the recording unit 20 and the transport unit 30 by a first horizontal movement mechanism (not shown) described later, the recording head 22 is placed on the transport surface 31A of the transport belt 31. Ink can be ejected toward the loaded paper T.

  The cap unit 50 is configured to be horizontally movable in the paper transport direction P (see FIG. 1) when the cap base member 53 is moved in the horizontal direction by a first horizontal movement mechanism (not shown).

  The cap unit 50 is switched to an attaching / detaching position at which the cap case 52 can be attached to and detached from each recording head 22 or a retracted position away from the attaching / detaching position in the horizontal direction by a moving operation by the first horizontal moving mechanism. During the recording operation in the recording unit 20, the cap unit 50 is disposed at the retracted position.

  The cleaning unit 25 is configured to be disposed below the cap unit 50 and above the transport unit 30 (between the cap unit 50 and the transport unit 30). As with the cap unit 50, the cleaning unit 25 can be moved up and down in conjunction with the lifting and lowering of the transport unit 30 by a predetermined moving mechanism (not shown) while being arranged between the cap unit 50 and the transport unit 30. Composed.

  The cleaning unit 25 is configured to be horizontally movable in the paper transport direction P (see FIG. 1) by a second horizontal movement mechanism (not shown). The cleaning unit 25 is a wipe position that is disposed below each recording head 22 and can clean each recording head 22 by a moving operation by the second horizontal movement mechanism, or a retreat position that is separated from the wipe position in the horizontal direction. Can be switched to. When the recording unit 20 performs a recording operation or when the cap unit 50 is mounted on the nozzle surface of the recording head 22, the cleaning unit 25 is disposed at the retracted position.

Next, the configuration of the lifting mechanism 40 will be described with reference to FIGS. 3A and 3B.
FIG. 3A is a schematic configuration diagram schematically illustrating the configuration of the lifting mechanism 40 in the inkjet recording apparatus 1. FIG. 3B is a schematic configuration diagram schematically illustrating the configuration of the lifting mechanism 40 in the inkjet recording apparatus 1.

  As shown in FIGS. 3A and 3B, the ink jet recording apparatus 1 includes a recording unit 20, a transport unit 30, an elevating mechanism 40, a holding unit 45, and a damper member 60.

  As described above, the recording unit 20 includes the recording heads 22 (head units) corresponding to the four colors. The four color recording heads 22K, 22C, 22M, and 22Y are formed on nozzle surfaces and have ink ejection nozzles (nozzles) that eject ink.

As described above, the transport unit 30 is disposed below the recording head 22 in the recording unit 20 in the vertical direction, and is movably disposed between a recording position close to the recording head 22 and a non-recording position separated from the recording head 22. Is done.
As described above, the transport unit 30 can transport the paper T (image forming material).
Further, the transport unit 30 is located at a non-recording position or moves from the recording position to the non-recording position by its own weight when a clutch unit 110 described later is in a non-transmitting state.

  The elevating mechanism 40 includes a wire member 130, a roll member 120, a motor 105 (rotation drive unit), and a clutch unit 110. Here, the wire member 130 and the roll member 120 constitute a moving mechanism that moves the transport unit 30.

  One end side of the wire member 130 is connected to the transport unit 30, and the other end side is wound around the roll member 120.

The roll member 120 is disposed above the transport unit 30 in the vertical direction. The roll member 120 is rotationally driven by a rotational driving force transmitted from the motor 105 via the clutch unit 110.
The roll member 120 can wind or feed the wire member 130. The roll member 120 is driven to rotate to wind or unwind the wire member 130.
The roll member 120 moves the conveyance unit 30 to the recording position and the non-recording position by winding or unwinding the wire member 130.

The motor 105 is configured to be capable of outputting a rotational driving force that rotates the roll member 120 so as to wind up or feed out the wire member 130 by being supplied with a first voltage (for example, voltage 100 V) described later.
In this embodiment, the motor 105 does not output a rotational driving force when a primary power source (for example, a main power source unit) described later is turned off. In this state, the output shaft of the motor 105 is maintained in a state where it does not rotate due to an internal load. For example, when the primary power supply is turned off with the transport unit 30 positioned at the recording position, the transport unit 30 is held at the recording position if the clutch unit 110 is in the transmission state.

The clutch unit 110 is disposed between the motor 105 and the roll member 120. The clutch unit 110 can be changed between a transmission state in which the rotational driving force output from the motor 105 is transmitted to the roll member 120 and a non-transmission state in which the rotational driving force output from the motor 105 is not transmitted to the roll member 120. It is.
The state of the clutch unit 110 is changed when a second voltage (for example, a voltage of 24 V) is supplied.

The clutch unit 110 is switched from the transmission state to the non-transmission state or from the non-transmission state to the transmission state by supplying a second voltage output from the secondary power source unit 210 to the clutch unit 110 by a clutch control unit 240 described later. The state is changed.
Specifically, when the voltage detection unit 230 described later detects that the first voltage output (supplied) from the primary power supply unit 200 has become equal to or lower than a predetermined threshold voltage, the clutch unit 110 receives the clutch control unit. By 240, the state is changed from the transmission state to the non-transmission state. In this case, the transport unit 30 described above moves from the recording position to the non-recording position by its own weight.
Here, the clutch part 110 is comprised by the one-shot type clutch, the electromagnetic clutch, etc., for example.

  The holding unit 45 is disposed on the lower side in the vertical direction of the transport unit 30 located at the non-recording position. The holding unit 45 holds the transport unit 30 at the non-recording position.

  The damper member 60 is disposed on the lower side in the vertical direction of the transport unit 30. The damper member 60 absorbs an impact when the transport unit 30 that moves (drops) from the recording position to the non-recording position due to its own weight collides with the holding unit 45. The damper member 60 prevents the transport unit 30 from strongly colliding with the holding unit 45.

  Next, functional blocks in the inkjet recording apparatus 1 will be described with reference to FIG. FIG. 4 is a functional block diagram of the inkjet recording apparatus 1.

  As shown in FIG. 4, the inkjet recording apparatus 1 includes a primary power supply unit 200, a secondary power supply unit 210, a voltage detection unit 230, a determination unit 235, a clutch control unit 240, a motor 105, and a clutch unit. 110.

The primary power supply unit 200 is a power supply unit that can supply a first voltage. In the present embodiment, the primary power supply unit 200 supplies the first voltage to a plurality of operation units including the motor 105, for example.
In addition, the primary power supply unit 200 is a main power supply unit in the inkjet recording apparatus 1 in the present embodiment. The primary power supply unit 200 is configured to be switchable between a supply state (on state) and a non-supply state (off state) by a main power switch (not shown).

  Further, the primary power supply unit 200 is electrically connected to an external power supply by an electric wire and an outlet. When the outlet is disconnected from the external power supply (is not connected to the external power supply), the primary power supply unit 200 changes from the supply state to the non-supply state. In this case, the driving or the like of the operation unit that is driven by receiving the first voltage from the primary power supply unit 200 is stopped. Specifically, the motor 105 is not driven and the output shaft does not rotate.

The secondary power supply unit 210 is a power supply unit that is supplied with the first voltage from the primary power supply unit 200 and outputs a second voltage smaller than the first voltage. The secondary power supply unit 210 performs a step-down process or AC / DC conversion on the first voltage supplied from the primary power supply unit 200 and outputs a predetermined second voltage.
In the present embodiment, the secondary power supply unit 210 supplies the second voltage to a plurality of operation units including the clutch unit 110.

  The voltage detection unit 230 detects the voltage output from the primary power supply unit 200. The voltage detection unit 230 is provided for grasping a change in voltage output from the primary power supply unit 200. The voltage detection unit 230 outputs the detection result to the determination unit 235.

The determination unit 235 determines whether the voltage detected by the voltage detection unit 230 is equal to or lower than a threshold voltage that is smaller than the first voltage and larger than the second voltage. The threshold voltage is set with reference to the first voltage, for example. The threshold voltage is set to 80% of the first voltage, for example.
The determination unit 235 outputs a predetermined signal (information) to the clutch control unit 240 when determining that the voltage detected by the voltage detection unit 230 is equal to or lower than a threshold voltage that is smaller than the first voltage and larger than the second voltage. To do.

The clutch control unit 240 changes the state of the clutch unit 110 by supplying the second voltage output from the secondary power source unit 210 to the clutch unit 110.
The clutch control unit 240 is output from the secondary power source unit 210 when the determination unit 235 determines that the voltage detected by the voltage detection unit 230 is equal to or lower than the threshold voltage when the clutch unit 110 is in the transmission state. The second voltage is supplied to the clutch unit 110 to change the state of the clutch unit 110 to the non-transmission state.
More specifically, when the clutch control unit 240 receives a predetermined signal (information) output from the determination unit 235 when the clutch unit 110 is in the transmission state, the clutch control unit 240 switches a switch or the like (not shown) to turn on the secondary power supply. The second voltage output from the unit 210 is supplied to the clutch unit 110 to change the state of the clutch 110 to the non-transmission state.

Here, when the voltage output from the primary power supply unit 200 becomes equal to or lower than a predetermined threshold voltage, the primary power supply unit 200 is still outputting a voltage higher than the second voltage. Therefore, at that time, the secondary power supply unit 210 is in a state capable of outputting the second voltage.
Then, the clutch control unit 240 supplies the second voltage output from the secondary power supply unit 210 to the clutch unit 110 when the voltage output from the primary power supply unit 200 becomes equal to or lower than a predetermined threshold voltage. Thus, the state of the clutch unit 110 is changed from the transmission state to the non-transmission state.
Thereby, the inkjet recording apparatus 1 can position the conveyance unit 30 in the non-recording position by its own weight, and can avoid holding the conveyance unit 30 at the recording position.

  Next, the operation of the inkjet recording apparatus 1 will be described with reference to FIG. FIG. 5 is a flowchart for explaining the operation of the inkjet recording apparatus 1.

  As shown in FIG. 5, in step ST101, the transport unit 30 is located at the recording position. The transport unit 30 is disposed close to the lower side of the recording unit 20 (recording head 22).

  Next, in step ST102, the voltage detection unit 230 detects the voltage of the primary power supply unit 200. The voltage detector 230 detects the voltage output from the primary power supply unit 200 continuously or intermittently. Then, the voltage detection unit 230 outputs the detection result to the determination unit 235.

Subsequently, in step ST103, the determination unit 235 determines whether the voltage output from the primary power supply unit 200 is equal to or lower than the threshold voltage based on the detection result output from the voltage detection unit 230.
If determining unit 235 determines that the voltage output from primary power supply unit 200 is equal to or lower than the threshold voltage (ST103, YES), the process proceeds to step ST104.
Further, when the determination unit 235 does not determine that the voltage output from the primary power supply unit 200 is equal to or lower than the threshold voltage (determined to be larger than the threshold voltage) (ST103, NO), the process is performed in step ST102. Return to.

  Subsequently, in step ST <b> 104, the clutch control unit 240 supplies the second voltage output from the secondary power supply unit 210 to the clutch unit 110. Thereby, the state of the clutch unit 110 is changed from the transmission state to the non-transmission state. The clutch control unit 240 switches the state of the clutch unit 110 by supplying the second voltage output from the secondary power source unit 210 to the clutch unit 110.

  Subsequently, in step ST105, when the clutch unit 110 is changed to the non-transmission state, the transport unit 30 moves (drops) in the vertical direction under its own weight.

  Subsequently, in step ST <b> 106, the damper member 60 absorbs an impact when the transport unit 30 moving (falling) from the recording position to the non-recording position due to its own weight collides with the holding unit 45.

  Subsequently, in step ST107, the holding unit 45 holds the transport unit 30 moved from the recording position at the non-recording position.

According to the present embodiment, the ink jet recording apparatus 1 is configured such that when the primary power source (main power source) is turned off in a state where the transport unit 30 is located at a recording position close to the recording unit 20 (recording head 22), The transport unit 30 can be moved to a non-recording position separated from the recording unit 20 (recording head 22).
Thereby, the ink jet recording apparatus 1 is connected to the recording unit 20 (recording head 22) when the primary power source unit (main power source) is turned off (for example, due to power failure, circuit breaker down, outlet disconnection, etc.). When the paper T is disposed between the transport unit 30 and the paper T, it is possible to suppress the paper T from being jammed (paper jammed). As a result, the ink jet recording apparatus 1 prevents ink from being ejected onto the jammed paper, and the jammed paper coming into contact with the nozzle surface of the recording head 22 to prevent the nozzle performance of the recording head 22 from deteriorating.

Further, according to the present embodiment, the ink jet recording apparatus 1 changes the state of the clutch unit 110 to the non-transmitting state while the transport unit 30 is positioned at the recording position, so that the transport unit 30 moves to the non-recording position due to its own weight. Configured to move.
Accordingly, the inkjet recording apparatus 1 can easily move the transport unit 30 from the recording position to the non-recording position in the recording unit 20 (recording head 22).

Further, according to the present embodiment, when the voltage output from the primary power supply unit 200 becomes equal to or lower than the predetermined threshold voltage, the inkjet recording apparatus 1 before the output voltage becomes equal to or lower than the second voltage. By supplying the second voltage output from the secondary power supply unit 210 to the clutch unit 110, the state of the clutch unit 110 can be changed from the transmission state to the non-transmission state.
Accordingly, the inkjet recording apparatus 1 can reliably move the transport unit 30 from the recording position to the non-recording position when the main power supply is turned off.

  Further, according to the present embodiment, the ink jet recording apparatus 1 includes the holding unit 45 that is disposed on the lower side in the vertical direction of the transport unit 30 located at the non-recording position and holds the transport unit 30 at the non-recording position. Accordingly, the ink jet recording apparatus 1 can hold the transport unit 30 at the non-recording position even when the clutch unit 110 is in the non-transmitting state.

  In addition, according to the present embodiment, the inkjet recording apparatus 1 includes the damper member 60 that is disposed on the lower side in the vertical direction of the transport unit 30 and suppresses the movement of the transport unit that moves from the recording position to the non-recording position by its own weight. . Thereby, since the ink jet recording apparatus 1 can suppress the conveyance unit 30 from strongly colliding with the holding portion 45 by the damper member 60, it is possible to suppress noise and damage to the conveyance unit 30 and the like.

As mentioned above, although preferred embodiment of this invention was described, this invention can be implemented with a various form, without being limited to embodiment mentioned above.
For example, in the present embodiment, a color printer is described as the ink jet recording apparatus 1, but the present invention is not limited to this, and the ink jet recording apparatus 1 may be a monochrome printer, a monochrome copier, a color copier, a facsimile machine, or the like. It may be a multifunction machine or the like.
Further, the sheet-shaped transfer material is not limited to the paper T, and may be a film sheet, for example.

DESCRIPTION OF SYMBOLS 1 ... Inkjet recording device 20 ... Recording part 22 ... Recording head (head part)
30 …… Transport unit 105 …… Motor (rotary drive)
110 …… Clutch part 120 …… Roll member 130 …… Wire member 200 …… Primary power supply part 210 …… Secondary power supply part 230 …… Voltage detection part 235 …… Determination part 240 …… Clutch control part

Claims (5)

A primary power supply unit capable of supplying a first voltage;
A secondary power source that is supplied with the first voltage from the primary power source and outputs a second voltage lower than the first voltage;
A head portion having nozzles for discharging ink;
A transport unit that is disposed on the lower side in the vertical direction of the head unit and is movably disposed between a recording position close to the head unit and a non-recording position spaced from the head unit, and capable of transporting an image forming material; ,
A wire member connected to the transport unit;
A roll that is arranged on the upper side in the vertical direction of the transport unit and is capable of winding or feeding the wire member and moving the transport unit to the recording position and the non-recording position by winding or feeding the wire member. Members,
A rotation driving unit capable of outputting a rotation driving force for rotating the roll member so as to wind or feed out the wire member by being supplied with the first voltage;
The state can be changed between a transmission state in which the rotation driving force output from the rotation driving unit is transmitted to the roll member and a non-transmission state in which the rotation driving force output from the rotation driving unit is not transmitted to the roll member. A clutch portion that changes state when the second voltage is supplied;
A voltage detection unit for detecting a voltage output from the primary power supply unit;
A determination unit that determines whether a voltage detected by the voltage detection unit is equal to or lower than a threshold voltage that is smaller than the first voltage and larger than the second voltage;
A clutch control unit that changes the state of the clutch unit by supplying the second voltage output from the secondary power source unit to the clutch unit;
When the clutch unit is in the transmission state, the second voltage output from the secondary power source unit when the determination unit determines that the voltage detected by the voltage detection unit is equal to or lower than the threshold voltage. An ink jet recording apparatus comprising: a clutch control unit configured to supply the clutch unit to change the state of the clutch unit to the non-transmission state. 2. The ink jet recording apparatus according to claim 1, wherein the transport unit is positioned at the non-recording position or moves from the recording position to the non-recording position by its own weight when the clutch unit is in the non-transmitting state. The inkjet recording apparatus according to claim 2, further comprising: a holding unit that is disposed on a lower side in the vertical direction of the transport unit positioned at the non-recording position and holds the transport unit at the non-recording position. An ink jet recording apparatus according to claim 3, further comprising a damper member disposed on a lower side in the vertical direction of the transport unit. A primary power supply unit capable of supplying a first voltage;
A secondary power source that is supplied with the first voltage from the primary power source and outputs a second voltage lower than the first voltage;
A head portion having nozzles for discharging ink;
A transport unit that is disposed on the lower side in the vertical direction of the head unit and is movably disposed between a recording position close to the head unit and a non-recording position spaced from the head unit, and capable of transporting an image forming material; ,
An elevating mechanism for moving the transport unit to the recording position and the non-recording position,
A moving mechanism for moving the transport unit;
A rotation drive unit capable of outputting a rotation drive force for driving the moving mechanism;
The state can be changed between a transmission state in which the rotational driving force output from the rotational driving unit is transmitted to the moving mechanism and a non-transmission state in which the rotational driving force output from the rotational driving unit is not transmitted to the moving mechanism. An elevating mechanism having a clutch portion that changes state when the second voltage is supplied;
A voltage detection unit for detecting a voltage output from the primary power supply unit;
A determination unit that determines whether a voltage detected by the voltage detection unit is equal to or lower than a threshold voltage that is smaller than the first voltage and larger than the second voltage;
A clutch control unit that changes the state of the clutch unit by supplying the second voltage output from the secondary power source unit to the clutch unit;
When the clutch unit is in the transmission state, the second voltage output from the secondary power source unit when the determination unit determines that the voltage detected by the voltage detection unit is equal to or lower than the threshold voltage. An ink jet recording apparatus comprising: a clutch control unit configured to supply the clutch unit to change the state of the clutch unit to the non-transmission state.

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