JP2022151037A - Ink jet recording device - Google Patents

Abstract

To lift/lower a head unit and a processing unit by one motor and lift the head unit to a position higher than the processing unit.SOLUTION: A printer comprises: a head unit 11 which discharges ink to a sheet conveyed in the conveyance direction Y; a processing unit 14 which is adjacent to the downstream side in the conveyance direction Y with respect to the head unit 11 and has a cap unit 70 and a wipe unit 80 that perform processing on the head unit 11 by sliding to the head unit 11 side; a lifting mechanism 30 which takes up a first wire 31 suspending the head unit 11 and a second wire 32 suspending the processing unit 14 by one motor 35 and lifts/lowers the processing unit 14 at a speed slower than that of the head unit 11; and a control part which controls the lifting mechanism 30 so as to lift/lower the head unit 11 and the processing unit 14 to the image formation position where the head unit 11 forms an image and the processing position where the processing unit 14 performs processing.SELECTED DRAWING: Figure 9

Description

The present invention relates to an inkjet recording apparatus.

2. Description of the Related Art An inkjet recording apparatus is known that includes a processing unit that processes the nozzle surface of a head unit. For example, the processing unit includes a cap unit that covers the nozzle surface, a wipe unit that cleans the nozzle surface, and a slide mechanism that slides the cap unit and the wipe unit, and is provided on the side of the head unit. An inkjet recording apparatus includes an elevating mechanism that elevates a head unit, and a cap unit and a wipe unit are arranged by a slide mechanism below the head unit that is elevated by the elevating mechanism.

In the above configuration, when a sheet is jammed, the processing unit cannot be lifted, so there is a problem that it is difficult to remove the sheet even if the head unit is lifted. Therefore, conventionally, techniques for raising and lowering the processing unit have been studied. For example, in Patent Document 1, a recording unit includes a head frame that holds a full-line head and is movable in directions toward and away from a sheet conveying surface, and a head frame that holds cap means for capping the head. A cap frame movable in a direction substantially perpendicular to the moving direction of the body is integrally provided with the frame, and one end of the frame is rotatably supported by a shaft, thereby forming the entire recording unit. It has been proposed that the rollers be provided so as to be capable of swinging in the directions of approaching and retreating from the sheet conveying surface.

Japanese Patent Application Laid-Open No. 2004-74611

However, the configuration proposed in Patent Document 1 requires a motor for swinging the entire recording unit in addition to a motor for raising and lowering the head frame and a motor for sliding the cap frame, which increases costs and , there is a problem that the size of the apparatus is increased.

SUMMARY OF THE INVENTION It is an object of the present invention to provide an inkjet recording apparatus which can raise and lower a head unit and a processing unit with a single motor, and raise the head unit to a position higher than the processing unit. do.

In order to solve the above problems, an inkjet recording apparatus according to the present invention includes a head unit that ejects ink onto a sheet that is conveyed in a predetermined conveying direction, and a head unit that is adjacent to the head unit on the conveying direction upstream side or the conveying direction downstream side. A processing unit having a sliding portion that slides toward the head unit to perform processing on the head unit, a first wire that suspends the head unit, and a second wire that suspends the processing unit are operated by one motor. An elevating mechanism for winding up and elevating the processing unit at a slower speed than the head unit; an image forming position where the head unit forms an image; and a processing position where the processing unit performs the processing. and a control unit that controls the lifting mechanism to lift and lower the processing unit.

The elevating mechanism includes a first fixed pulley provided above the head unit, a second fixed pulley provided above the processing unit, and a movable pulley provided on the processing unit, A first wire has one end connected to the head unit and is wound around the first fixed pulley, and a second wire has one end fixed above the processing unit and includes the movable pulley and the second fixed pulley. It may be wrapped around.

The elevating mechanism includes a first fixed pulley provided above the head unit and a second fixed pulley provided above the processing unit, and the first wire has one end connected to the head unit. one end of the second wire is fixed to the processing unit and wound around the second fixed pulley; A first drum and a second drum having a diameter smaller than that of the first drum and winding the second wire may be provided.

The inkjet recording apparatus includes a detection unit that detects a jam of the sheet, and the control unit moves the head unit and the jam processing position to a jam processing position above the processing position when the detection unit detects the jam. It may be configured to raise the processing unit.

The slide portion includes a cap unit that slides toward the head unit to cover the nozzle surface of the head unit, and is provided above or below the cap unit, and slides toward the head unit to clean the nozzle surface. and a wipe unit.

According to the present invention, it is possible to raise and lower the head unit and the processing unit with one motor, and raise the head unit to a position higher than the processing unit.

1 is a front view schematically showing the internal configuration of a printer according to an embodiment of the invention; FIG. 4 is a diagram schematically showing an ink supply path according to one embodiment of the present invention; FIG. 3 is a cross-sectional view of an image forming unit according to one embodiment of the present invention; FIG. 1 is a perspective view of a head unit according to an embodiment of the invention; FIG. 1 is a perspective view of a processing unit according to one embodiment of the invention; FIG. FIG. 4 is a perspective view of a first slide mechanism and a second slide mechanism according to one embodiment of the present invention; FIG. 4 is a perspective view showing a state in which the cap unit according to one embodiment of the present invention is slid to an opposing position; FIG. 4 is a perspective view showing a state in which the wipe unit according to one embodiment of the present invention is slid to an opposing position; 1 is a front view schematically showing an elevating mechanism according to one embodiment of the present invention; FIG. It is a front view which shows operation|movement of the raising/lowering mechanism which concerns on one Embodiment of this invention. It is a front view which shows operation|movement of the raising/lowering mechanism which concerns on one Embodiment of this invention. It is a front view which shows operation|movement of the raising/lowering mechanism which concerns on one Embodiment of this invention. It is a front view which shows operation|movement of the raising/lowering mechanism which concerns on one Embodiment of this invention. It is a front view which shows operation|movement of the raising/lowering mechanism which concerns on one Embodiment of this invention. It is a front view which shows typically the raising/lowering mechanism based on the 1st modification of one embodiment of this invention. FIG. 11 is a front view schematically showing an elevating mechanism according to a second modified example of one embodiment of the present invention; FIG. 11 is a front view schematically showing a lift mechanism according to a third modified example of one embodiment of the present invention; FIG. 11 is a front view schematically showing a lift mechanism according to a fourth modified example of one embodiment of the present invention;

A printer 1 (inkjet recording apparatus) according to an embodiment of the present invention will be described below with reference to the drawings.

First, the overall configuration of the printer 1 will be described. FIG. 1 is a front view schematically showing the internal configuration of the printer 1. As shown in FIG. FIG. 2 is a diagram schematically showing an ink supply path. FIG. 3 is a cross-sectional view of the imaging unit 6. As shown in FIG. 4 is a perspective view of the head unit 11. FIG. Hereinafter, the front side of the printer 1 is defined as the front side of the paper surface of FIG. In each figure, U, Lo, L, R, Fr, and Rr indicate up, down, left, right, front, and rear, respectively.

The printer 1 is an inkjet image forming apparatus that forms an image by ejecting ink. The printer 1 has a rectangular parallelepiped housing 3 . In the lower portion of the housing 3 , a paper feed cassette 4 containing sheets S such as plain paper and coated paper, and a paper feed roller 5 for feeding the sheet S from the paper feed cassette 4 are provided. A conveying unit 7 that attracts and conveys the sheet S is provided above the sheet feeding cassette 4 . An inkjet image forming unit 6 is provided above the transport unit 7 . In the upper left part of the housing 3, a pair of discharge rollers 8 for discharging the sheet S on which an image is formed and a discharge tray 9 on which the discharged sheet S is stacked are provided.

The transport unit 7 is provided with a large number of ventilation holes (not shown), an endless transport belt 21 wound around a driving roller 22 and a driven roller 25, and a large number of ventilation holes. A conveying plate 23 that contacts the inner surface, and a suction unit 24 that sucks the sheet S to the conveying belt 21 by sucking air through the air holes of the conveying plate 23 and the air holes of the conveying belt 21 . By driving the driving roller 22 by a motor (not shown), the conveying belt 21 rotates counterclockwise in FIG. 1, and the sheet S attracted to the conveying belt 21 is conveyed in the Y direction.

The image forming unit 6 includes head units 11Y, 11Bk, 11C, and 11M (collectively referred to as head units 11), which eject yellow, black, cyan, and magenta inks, respectively. Ink containers 20Y, 20Bk, 20C, and 20M (collectively referred to as ink containers 20) filled with yellow, black, cyan, and magenta inks are connected to the head units 11Y, 11Bk, 11C, and 11M, respectively.

The head unit 11 includes one or more inkjet heads 12, for example, a plurality of inkjet heads 12 arranged in a staggered pattern (see FIGS. 2 to 4). The inkjet head 12 includes a rectangular parallelepiped housing 12H whose longitudinal direction is the front-rear direction, and a nozzle plate 12P provided at the bottom of the housing 12H. The nozzle plate 12P includes a large number of nozzles (not shown) arranged in the front-rear direction (the width direction of the transport belt 21 that intersects the transport direction Y of the transport belt 21). 12N). Each nozzle is provided with a piezoelectric element, and a drive circuit for driving the piezoelectric element is provided inside the housing 12H (not shown). The head unit 11 is provided with a cleaning liquid supply section 13 that supplies cleaning liquid to the nozzle surface 12N.

The printer 1 has an ink supply path 60 shown in FIG. In the same figure, the supply paths corresponding to one color of ink are shown, but in this embodiment, since four colors of ink are used, four systems of similar supply paths are provided. The ink supply path 60 includes a container mounting portion 61 to which the ink container 20 is mounted, a filter 62 for filtering the ink, a pump 63 for sucking the ink from the ink container 20 through the filter 62, and the pump 63. A sub-tank 64 for storing ink and a pump 65 for supplying the ink stored in the sub-tank 64 to the inkjet head 12 are provided.

Inside the housing 3, a transport path 10 is provided that extends from the paper feed cassette 4 through the gap between the image forming unit 6 and the transport unit 7 to the discharge tray 9. As shown in FIG. A plurality of transport roller pairs 17 that transport the sheet S are provided in the transport path 10 . A registration roller pair 18 is provided upstream of the image forming unit 6 in the transport direction.

Each unit of the printer 1 is controlled by the control unit 2 . The control unit 2 includes an arithmetic unit and a storage unit. The calculation unit is, for example, a CPU (Central Processing Unit). The storage unit includes storage media such as ROM (Read Only Memory), RAM (Random Access Memory), and EEPROM (Electrically Erasable Programmable Read Only Memory). The calculation unit performs various processes by reading and executing the control program stored in the storage unit. Note that the control unit 2 may be implemented by an integrated circuit that does not use software.

A basic image forming operation of the printer 1 is as follows. When an image forming job is input to the printer 1 from an external computer or the like, the paper feed roller 5 feeds the sheet S from the paper feed cassette 4 to the transport path 10, and the registration roller pair 18 whose rotation is stopped causes the sheet S to skew. Correct the line. When the registration roller pair 18 feeds the sheet S to the conveying unit 7 at a predetermined timing, the conveying unit 7 attracts the sheet S to the conveying belt 21 and conveys it in the Y direction. When the control unit 2 supplies gradation data corresponding to each nozzle of the inkjet head 12 to the drive circuit in synchronization with the conveyance of the sheet S, the drive circuit supplies a drive signal corresponding to the gradation data to the piezoelectric element. An image is formed on the sheet S by ejecting ink droplets from the nozzles. The discharge roller pair 8 discharges the image-formed sheet S to the discharge tray 9 .

Next, the configuration of the printer 1 will be described in detail. FIG. 5 is a perspective view of the processing unit 14. FIG. 6 is a perspective view of the first slide mechanism 75 and the second slide mechanism 85. FIG. FIG. 7 is a perspective view showing how the cap unit 70 is slid to the facing position. FIG. 8 is a perspective view showing how the wipe unit 80 is slid to the facing position.

The printer 1 is adjacent to a head unit 11 that ejects ink onto a sheet S conveyed in a predetermined conveying direction Y, and the head unit 11 on the upstream or downstream side in the conveying direction Y, and slides toward the head unit 11 side. A processing unit 14 having a slide portion (a cap unit 70 and a wipe unit 80) that performs processing on the head unit 11, a first wire 31 that suspends the head unit 11, and a second wire 32 that suspends the processing unit 14 are integrated into one. An elevating mechanism 30 that winds up with two motors 35 and raises and lowers the processing unit 14 at a speed slower than that of the head unit 11, an image forming position where the head unit 11 forms an image, and a processing position where the processing unit 14 performs processing. , and a control unit 2 that controls an elevating mechanism 30 to elevate the head unit 11 and the processing unit 14 . Since the head unit 11 is as described above, the components other than the head unit 11 will be described below.

[Processing unit]
The processing unit 14 (see FIGS. 3, 5, and 6) includes a cap unit 70, a first slide mechanism 75 (see FIG. 6) that slides the cap unit 70, a wipe unit 80, and a second mechanism that slides the wipe unit 80. A slide mechanism 85 (see FIG. 6) and a housing 14H that accommodates the cap unit 70 and the wipe unit 80 are provided. The housing 14H is formed in a rectangular parallelepiped shape whose longitudinal direction is the front-rear direction, and is provided with an opening on the right side. The processing unit 14 is provided to the left of each head unit 11 (downstream side in the transport direction Y) (see FIG. 3). The processing unit 14 may be provided on the right side of each head unit 11 (on the upstream side in the transport direction Y), and an opening may be provided on the left side of the housing 14H.

[Cap unit]
The cap unit 70 (see FIG. 7) includes a support plate 71 and a cap 72 provided on the upper surface of the support plate 71 . The same number of caps 72 as the ink jet heads 12 are arranged on the support plate 71 in a staggered manner. The cap 72 has a recess with an open top and a discharge port (not shown) provided at the bottom of the recess. The recess has a size that surrounds the nozzle surface 12N of one inkjet head 12 . At least the upper end portion of the cap 72 is made of resin such as rubber. A suction pump 68 for sucking the waste ink and a waste ink tank 69 for storing the waste ink are connected to the discharge port (see FIG. 2).

[First slide mechanism]
The first slide mechanism 75 (see FIG. 6) slides the cap unit 70 between a facing position facing the nozzle surface 12N and a retracted position accommodated in the housing 14H. The first slide mechanism 75 includes a slide rail 75S, a motor 75M, a reduction gear 75G, and a chain 75C. The support plate 71 is supported by the housing 14H via slide rails 75S and is slidable in the left-right direction with respect to the housing 14H. One end of the chain 75C is connected to the shaft of the reduction gear 75G, and the other end is connected to the support plate 71. As shown in FIG. When the motor 75M rotates forward, the chain 75C is wound around the shaft of the reduction gear 75G, and the cap unit 70 moves to the retracted position. When the motor 75M rotates in the reverse direction, the chain 75C is let out from the shaft of the reduction gear 75G, and the cap unit 70 moves to the opposite position (see FIG. 7). The cap unit 70 is an example of a slide portion.

[Wipe unit]
The wipe unit 80 (see FIG. 8) includes a support plate 81, a carriage 83 provided above the support plate 81, a wipe blade 82 projecting upward from the carriage 83, and a third slide mechanism 86 for sliding the carriage 83. (Omitted in FIG. 8). The same number of wipe blades 82 as the inkjet heads 12 are arranged on the carriage 83 in a zigzag pattern. The carriage 83 has a hollow structure, and an opening 83A is provided in front of each wipe blade 82 . The carriage 83 is supported by the support plate 81 and is slidable in the front-rear direction with respect to the support plate 81 . The third slide mechanism 86 is, for example, one that drives a wire coupled to the carriage 83 with a pulley, a rack and pinion, a ball screw, a linear motor, or the like, and moves the carriage 83 forward and backward with respect to the support plate 81. . A discharge port (not shown) is provided at the bottom of the carriage 83, and the suction pump 68 and the waste ink tank 69 are connected to the discharge port (see FIG. 2).

[Second slide mechanism]
The second slide mechanism 85 (see FIG. 6) slides the wipe unit 80 between a facing position facing the nozzle surface 12N and a retracted position accommodated in the housing 14H. The second slide mechanism 85 includes a slide rail 85S, a motor 85M, a reduction gear 85G, and a chain 85C. The support plate 81 is supported by the housing 14H via slide rails 85S and is slidable in the left-right direction with respect to the housing 14H. One end of the chain 85C is connected to the shaft of the reduction gear 85G, and the other end is connected to the support plate 81. As shown in FIG. When the motor 85M rotates forward, the chain 85C is wound around the shaft of the reduction gear 85G, and the wipe unit 80 moves to the retracted position. When the motor 85M rotates in the reverse direction, the chain 85C is let out from the shaft of the reduction gear 85G, and the wipe unit 80 moves to the opposite position (see FIG. 8). Wipe unit 80 is an example of a slide portion.

[lifting mechanism]
Next, the configuration of the lifting mechanism 30 will be described. FIG. 9 is a front view schematically showing the lifting mechanism 30. As shown in FIG. The drawing shows a state in which the head unit 11 is positioned at the image forming position. The image forming position is a position where the head unit 11 ejects ink to form an image on the sheet S. FIG. At this time, the bottom surface (nozzle surface 12N) of the inkjet head 12 faces the conveying belt 21 at a predetermined distance. The bottom surface of the housing 14H of the processing unit 14 also faces the conveying belt 21 at the same interval as the nozzle surface 12N.

Although similar elevating mechanisms 30 are provided in front of and behind the head unit 11 and the processing unit 14, the elevating mechanism 30 on the front side will be described here. The lifting mechanism 30 includes a first wire 31 , a second wire 32 , a motor 35 , a drum 36 , a first fixed pulley 41 , a second fixed pulley 42 and a movable pulley 43 .

The first fixed pulley 41 is provided above the head unit 11 . The second fixed pulley 42 is provided above the processing unit 14 . The motor 35 is provided between the first fixed pulley 41 and the second fixed pulley 42 . The motor 35 is, for example, an electric motor, but may be anything as long as it generates torque. A drum 36 is provided on the output shaft of the motor 35 . Driving of the motor 35 is controlled by the controller 2 . The first fixed pulley 41 , the second fixed pulley 42 and the motor 35 are supported by the housing 3 . The movable pulley 43 is provided on the front surface of the processing unit 14 .

The first wire 31 has one end connected to the connection point 11A on the front surface of the head unit 11 , is wound around the first fixed pulley 41 , and has the other end connected to the drum 36 . The second wire 32 has one end fixed to a fixed point 3</b>F above the processing unit 14 , wound around the movable pulley 43 and the second fixed pulley 42 , and the other end connected to the drum 36 . The fixing point 3</b>F is provided at a location above the processing unit 14 in the housing 3 .

[Detector]
The detection unit 26 (see FIG. 1) detects jamming of the sheets S on the conveying path 10 . Although only one detector 26 is shown in FIG. The detection unit 26 is, for example, an optical sensor. When the detection unit 26 faces the sheet S, reflected light is received with a reflectance specific to the sheet S. FIG. In this case, the detector 26 outputs a signal of the first level. When the detection unit 26 does not face the sheet S, the reflected light is received with a reflectance different from that of the sheet S. In this case, the detector 26 outputs a second level signal. The control unit 2 determines that the sheet S is jammed in the conveying path 10 when the first level signal continues for a predetermined time or longer.

Next, the operation of the lifting mechanism 30 will be described. 10 to 14 are front views showing the operation of the lifting mechanism 30. FIG. When the control unit 2 rotates the motor 35 forward (direction A in FIG. 9), the first wire 31 is wound and the head unit 11 is lifted. The second wire 32 is also wound in the same direction as the first wire 31 , but since the second wire 32 is wound around the movable pulley 43 , the processing unit 14 can operate at half the speed of the head unit 11 . Rise.

For example, when performing processing by the cap unit 70, the controller 2 rotates the motor 35 forward until the bottom surface (nozzle surface 12N) of the head unit 11 is slightly higher than the cap unit 70 (see FIG. 10). Next, the control section 2 slides the cap unit 70 below the head unit 11 by the first slide mechanism 75 (see FIG. 11), and reversely rotates the motor 35 (direction B in FIG. 11). Then, the head unit 11 and the processing unit 14 descend, but since the processing unit 14 descends at half the speed of the head unit 11, the nozzle surface 12N comes into contact with the cap 72 and the nozzle surface 12N touches the cap 72. covered (see Figure 12). The positions of the head unit 11 and the processing unit 14 at this time are called cap positions. The controller 2 stops the motor 35 at the cap position. A cap position is an example of a processing position.

On the other hand, when performing processing by the wipe unit 80, the controller 2 causes the motor 35 to rotate forward until the nozzle surface 12N is slightly higher than the upper end of the wipe blade 82, and the second slide mechanism 85 moves the wipe unit 80 to the head unit. 11, and reversely rotate the motor 35 until the upper end of the wipe blade 82 contacts the nozzle surface 12N (see FIG. 13). The position of the head unit 11 and the processing unit 14 at this time is called a wipe position. A wipe position is also an example of a processing position. At the wipe position, the controller 2 drives the wipe blade 82 with the third slide mechanism 86 to clean the nozzle surface 12N.

Further, when the detection unit 26 detects jamming of the sheet S during image formation, the control unit 2 raises the head unit 11 and the processing unit 14 to the jam processing position above the wipe position (see FIG. 14). . In this case, the distance between the head unit 11, the processing unit 14, and the transport belt 21 is maximized.

In this embodiment, the wiping unit 80 is provided at a position lower than the cap unit 70 in the processing unit 14, so the wiping position is higher than the cap position. , the wipe position is lower than the cap position.

According to the printer 1 according to the present embodiment described above, the head unit 11 ejects ink onto the sheet S transported in the predetermined transport direction Y, and the head unit 11 is arranged upstream or downstream in the transport direction Y with respect to the head unit 11. A processing unit 14 which is adjacent to and has a sliding portion (cap unit 70, wipe unit 80) that slides toward the head unit 11 to process the head unit 11, a first wire 31 that suspends the head unit 11, and the processing unit 14 and a second wire 32 for suspending a second wire 32 is wound by one motor 35, and a lifting mechanism 30 for lifting and lowering the processing unit 14 at a slower speed than the head unit 11, an image forming position where the head unit 11 forms an image, and a processing A control unit 2 for controlling an elevating mechanism 30 to move the head unit 11 and the processing unit 14 up and down is provided at a processing position where the unit 14 performs processing. According to this configuration, the head unit 11 and the processing unit 14 can be lifted and lowered with the single motor 35 and the head unit 11 can be raised to a position higher than the processing unit 14 . At the processing position, not only the head unit 11 but also the processing unit 14 are raised, which facilitates the work of removing the jammed sheet S. Further, the processing can be performed by sliding the slide portion downward of the head unit 11 at the processing position.

Further, according to the printer 1 according to the present embodiment, the lifting mechanism 30 includes the first fixed pulley 41 provided above the head unit 11, the second fixed pulley 42 provided above the processing unit 14, a movable pulley 43 provided in the processing unit 14, a first wire 31 having one end connected to the head unit 11 and wound around the first fixed pulley 41; Since one end is fixed upward and wound around the movable pulley 43 and the second fixed pulley 42, a difference in ascending speed between the head unit 11 and the processing unit 14 can be generated with a simple configuration.

Further, according to the printer 1 according to the present embodiment, the detection unit 26 that detects a jam of the sheet S is provided, and when the detection unit 26 detects a jam, the control unit 2 performs jam processing above the processing position. Since the head unit 11 and the processing unit 14 are raised to the position, the work of removing the jammed sheet S becomes easier.

Further, according to the printer 1 according to the present embodiment, the slide portion includes the cap unit 70 that slides toward the head unit 11 to cover the nozzle surface 12N of the head unit 11, and is provided above or below the cap unit 70, Since it includes the wipe unit 80 that slides toward the head unit 11 to clean the nozzle surface 12N, processing using the cap unit 70 and processing using the wipe unit 80 can be performed.

The above embodiment may be modified as follows.

[First modification]
FIG. 15 is a front view schematically showing the lifting mechanism 30 according to the first modified example. The second wire 32 has one end fixed to the first fixed point 3F1 above the processing unit 14, wound around the first movable pulley 431 and the second fixed pulley 42, and the other end connected to the drum 36. As shown in FIG. The first fixing point 3F1 is provided at a location above the processing unit 14 in the housing 3. As shown in FIG. A second movable pulley 432 is provided on the front surface of the processing unit 14 . The third wire 33 has one end fixed to the second fixing point 3F2 above the processing unit 14, wound around the second movable pulley 432, and the other end connected to the shaft 431A of the first movable pulley 431.

According to this configuration, the first movable pulley 431 rises at half the speed of the head unit 11 , and the second movable pulley 432 rises at half the speed of the first movable pulley 431 . Therefore, the processing unit 14 rises at one-fourth the speed of the head unit 11 . Therefore, the processing using the cap unit 70 and the processing using the wipe unit 80 can be performed with a shorter movement distance than in the above embodiment. Therefore, the size of the housing 3 can be reduced as compared with the above embodiment.

[Second modification]
FIG. 16 is a front view schematically showing the lifting mechanism 30 according to the second modified example. The second wire 32 has one end connected to the connection point 14A of the processing unit 14 and is wound around the second fixed pulley 42 . The motor 35 includes a first drum 361 that winds the first wire 31 and a second drum 362 that has a smaller diameter than the first drum 361 and winds the second wire 32 . In this configuration, by setting the diameter of the second drum 362 to half that of the first drum 361, the same effect as in the above embodiment can be obtained. Further, by changing the diameter ratio of the first drum 361 and the second drum 362, the speed ratio of the elevation of the head unit 11 and the processing unit 14 can be changed to other than 1/2.

[Third Modification]
FIG. 17 is a front view schematically showing an elevating mechanism 30 according to a third modified example. The lifting mechanism 30 includes a first drum 361 provided above the head unit 11 and a second drum 362 provided above the processing unit 14 . The lifting mechanism 30 includes a first driven gear 51 coaxial with the first drum 361, a second driven gear 52 coaxial with the second drum 362, an idle gear 54 meshed with the first driven gear 51, and a 2 A driven gear 52 and a drive gear 53 meshed with an idle gear 54 are provided, and the motor 35 drives the drive gear 53 . The first wire 31 has one end connected to the connection point 11A of the head unit 11 and the other end connected to the first drum 361 . The second wire 32 has one end connected to the connection point 14A of the processing unit 14 and the other end connected to the second drum 362 .

In this configuration, by making the diameter of the second driven gear 52 half that of the first driven gear 51, the same effects as in the above embodiment can be obtained. Further, by changing the ratio of the diameters of the first driven gear 51 and the second driven gear 52, the vertical speed ratio of the head unit 11 and the processing unit 14 can be changed to other than 1/2.

[Fourth Modification]
FIG. 18 is a front view schematically showing a lifting mechanism 30 according to a fourth modification. A spiral spring 57 is provided above the processing unit 14 . The second wire 32 has one end 32 T connected to the spiral spring 57 , is wound around the moving pulley 43 and the second fixed pulley 42 , and has the other end connected to the drum 36 . The maximum value of the torque for unwinding the spiral spring 57 when the spiral spring 57 is pulled out is less than the torque of the motor 35 . Therefore, when the motor 35 rotates in direction A, the second wire 32 is wound around the drum 36 and the spiral spring 57 is pulled out. At this time, the head unit 11 is lifted, but the processing unit 14 is not lifted.

When the spiral spring 57 is pulled out to the maximum possible amount, the one end 32T of the second wire 32 stops descending. The length of the spiral spring 57 is set so that the bottom surface of the head unit 11 is positioned above the upper end of the cap 72 at this time. After that, when the motor 35 further rotates in the A direction, the processing unit 14 rises because the one end 32T of the second wire 32 does not descend. The rising speed of the processing unit 14 at this time is half that of the head unit 11 . According to this configuration, the cap position, the wipe position, and the jam processing position are set at lower positions than in the above-described embodiment, so the housing 3 can be made smaller.

1 Printer (inkjet recording device)
2 control units 11, 11Y, 11Bk, 11C, 11M head unit 14 processing unit 30 lifting mechanism 31 first wire 32 second wire 35 motor 41 first fixed pulley 42 second fixed pulley 43 movable pulley 361 first drum 362 second Drum 70 cap unit (sliding part)
80 wipe unit (slide part)

Claims (5)

a head unit that ejects ink onto a sheet conveyed in a predetermined conveying direction;
a processing unit adjacent to the head unit on the upstream side or the downstream side in the transport direction and having a slide portion that slides toward the head unit side and performs processing on the head unit;
an elevating mechanism for winding a first wire for suspending the head unit and a second wire for suspending the processing unit by a single motor, and for elevating the processing unit at a slower speed than the head unit;
an image forming position where the head unit forms an image and a processing position where the processing unit performs the processing; An inkjet recording apparatus characterized by: The lifting mechanism is
a first fixed pulley provided above the head unit;
a second fixed pulley provided above the processing unit;
and a movable pulley provided in the processing unit,
the first wire having one end connected to the head unit and wound around the first fixed pulley;
2. An inkjet recording apparatus according to claim 1, wherein said second wire has one end fixed above said processing unit and is wound around said movable pulley and said second fixed pulley. The lifting mechanism is
a first fixed pulley provided above the head unit;
a second fixed pulley provided above the processing unit;
the first wire having one end connected to the head unit and wound around the first fixed pulley;
the second wire has one end connected to the processing unit and is wound around the second fixed pulley;
The motor is
a first drum for winding the first wire;
2. The inkjet recording apparatus according to claim 1, further comprising a second drum having a diameter smaller than that of the first drum and winding the second wire. A detection unit that detects jamming of the sheet,
4. The controller according to any one of claims 1 to 3, wherein, when said detection unit detects a jam, said control unit raises said head unit and said processing unit to a jam processing position above said processing position. 2. The inkjet recording apparatus according to item 1. The slide part
a cap unit that slides toward the head unit and covers a nozzle surface of the head unit;
5. The inkjet according to any one of claims 1 to 4, further comprising a wipe unit provided above or below the cap unit and sliding toward the head unit to clean the nozzle surface. recording device.

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